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How to remove a package entirely?

- by maria

Hi I'm quite new to Linux, but before using it I was hearing that Windows programs, after uninstallation, leaves a lot of remains on the hard disc, and Linux removes all. I'm using Ubuntu 10.04. To uninstall packages I'm using sudo apt-get autoremove application_name or sudo aptitude purge application_name. Recently I have installed texlive-full and for some reasons I had quickly to uninstall it. After I've entered to terminal updatedb, then locate *texlive* and the output was very long: maria@marysia-ubuntu:~$ locate *texlive* /etc/texmf/fmt.d/10texlive-base.cnf /etc/texmf/fmt.d/10texlive-formats-extra.cnf /etc/texmf/fmt.d/10texlive-lang-cyrillic.cnf /etc/texmf/fmt.d/10texlive-lang-czechslovak.cnf /etc/texmf/fmt.d/10texlive-lang-polish.cnf /etc/texmf/fmt.d/10texlive-latex-base.cnf /etc/texmf/fmt.d/10texlive-math-extra.cnf /etc/texmf/fmt.d/10texlive-metapost.cnf /etc/texmf/fmt.d/10texlive-omega.cnf /etc/texmf/fmt.d/10texlive-xetex.cnf /etc/texmf/hyphen.d/09texlive-base.cnf /etc/texmf/hyphen.d/10texlive-lang-arabic.cnf /etc/texmf/hyphen.d/10texlive-lang-croatian.cnf /etc/texmf/hyphen.d/10texlive-lang-cyrillic.cnf /etc/texmf/hyphen.d/10texlive-lang-czechslovak.cnf /etc/texmf/hyphen.d/10texlive-lang-danish.cnf /etc/texmf/hyphen.d/10texlive-lang-dutch.cnf /etc/texmf/hyphen.d/10texlive-lang-finnish.cnf /etc/texmf/hyphen.d/10texlive-lang-french.cnf /etc/texmf/hyphen.d/10texlive-lang-german.cnf /etc/texmf/hyphen.d/10texlive-lang-greek.cnf /etc/texmf/hyphen.d/10texlive-lang-hungarian.cnf /etc/texmf/hyphen.d/10texlive-lang-indic.cnf /etc/texmf/hyphen.d/10texlive-lang-italian.cnf /etc/texmf/hyphen.d/10texlive-lang-latin.cnf /etc/texmf/hyphen.d/10texlive-lang-latvian.cnf /etc/texmf/hyphen.d/10texlive-lang-lithuanian.cnf /etc/texmf/hyphen.d/10texlive-lang-mongolian.cnf /etc/texmf/hyphen.d/10texlive-lang-norwegian.cnf /etc/texmf/hyphen.d/10texlive-lang-other.cnf /etc/texmf/hyphen.d/10texlive-lang-polish.cnf /etc/texmf/hyphen.d/10texlive-lang-portuguese.cnf /etc/texmf/hyphen.d/10texlive-lang-spanish.cnf /etc/texmf/hyphen.d/10texlive-lang-swedish.cnf /etc/texmf/hyphen.d/10texlive-lang-ukenglish.cnf /etc/texmf/updmap.d/10texlive-base.cfg /etc/texmf/updmap.d/10texlive-fonts-extra.cfg /etc/texmf/updmap.d/10texlive-fonts-recommended.cfg /etc/texmf/updmap.d/10texlive-games.cfg /etc/texmf/updmap.d/10texlive-lang-african.cfg /etc/texmf/updmap.d/10texlive-lang-arabic.cfg /etc/texmf/updmap.d/10texlive-lang-cyrillic.cfg /etc/texmf/updmap.d/10texlive-lang-czechslovak.cfg /etc/texmf/updmap.d/10texlive-lang-french.cfg /etc/texmf/updmap.d/10texlive-lang-greek.cfg /etc/texmf/updmap.d/10texlive-lang-hebrew.cfg /etc/texmf/updmap.d/10texlive-lang-indic.cfg /etc/texmf/updmap.d/10texlive-lang-lithuanian.cfg /etc/texmf/updmap.d/10texlive-lang-mongolian.cfg /etc/texmf/updmap.d/10texlive-lang-polish.cfg /etc/texmf/updmap.d/10texlive-lang-vietnamese.cfg /etc/texmf/updmap.d/10texlive-latex-base.cfg /etc/texmf/updmap.d/10texlive-latex-extra.cfg /etc/texmf/updmap.d/10texlive-math-extra.cfg /etc/texmf/updmap.d/10texlive-omega.cfg /etc/texmf/updmap.d/10texlive-pictures.cfg /etc/texmf/updmap.d/10texlive-science.cfg /var/cache/apt/archives/texlive-base_2009-7_all.deb /var/cache/apt/archives/texlive-bibtex-extra_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-binaries_2009-5ubuntu0.2_i386.deb /var/cache/apt/archives/texlive-common_2009-7_all.deb /var/cache/apt/archives/texlive-doc-base_2009-2_all.deb /var/cache/apt/archives/texlive-doc-bg_2009-2_all.deb /var/cache/apt/archives/texlive-doc-cs+sk_2009-2_all.deb /var/cache/apt/archives/texlive-doc-de_2009-2_all.deb /var/cache/apt/archives/texlive-doc-en_2009-2_all.deb /var/cache/apt/archives/texlive-doc-es_2009-2_all.deb /var/cache/apt/archives/texlive-doc-fi_2009-2_all.deb /var/cache/apt/archives/texlive-doc-fr_2009-2_all.deb /var/cache/apt/archives/texlive-doc-it_2009-2_all.deb /var/cache/apt/archives/texlive-doc-ja_2009-2_all.deb /var/cache/apt/archives/texlive-doc-ko_2009-2_all.deb /var/cache/apt/archives/texlive-doc-mn_2009-2_all.deb /var/cache/apt/archives/texlive-doc-nl_2009-2_all.deb /var/cache/apt/archives/texlive-doc-pl_2009-2_all.deb /var/cache/apt/archives/texlive-doc-pt_2009-2_all.deb /var/cache/apt/archives/texlive-doc-ru_2009-2_all.deb /var/cache/apt/archives/texlive-doc-si_2009-2_all.deb /var/cache/apt/archives/texlive-doc-th_2009-2_all.deb /var/cache/apt/archives/texlive-doc-tr_2009-2_all.deb /var/cache/apt/archives/texlive-doc-uk_2009-2_all.deb /var/cache/apt/archives/texlive-doc-vi_2009-2_all.deb /var/cache/apt/archives/texlive-doc-zh_2009-2_all.deb /var/cache/apt/archives/texlive-extra-utils_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-font-utils_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-fonts-extra-doc_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-fonts-extra_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-fonts-recommended-doc_2009-7_all.deb /var/cache/apt/archives/texlive-fonts-recommended_2009-7_all.deb /var/cache/apt/archives/texlive-formats-extra_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-full_2009-7_all.deb /var/cache/apt/archives/texlive-games_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-generic-extra_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-generic-recommended_2009-7_all.deb /var/cache/apt/archives/texlive-humanities-doc_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-humanities_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-lang-african_2009-3_all.deb /var/cache/apt/archives/texlive-lang-arabic_2009-3_all.deb /var/cache/apt/archives/texlive-lang-armenian_2009-3_all.deb /var/cache/apt/archives/texlive-lang-croatian_2009-3_all.deb /var/cache/apt/archives/texlive-lang-cyrillic_2009-3_all.deb /var/cache/apt/archives/texlive-lang-czechslovak_2009-3_all.deb /var/cache/apt/archives/texlive-lang-danish_2009-3_all.deb /var/cache/apt/archives/texlive-lang-dutch_2009-3_all.deb /var/cache/apt/archives/texlive-lang-finnish_2009-3_all.deb /var/cache/apt/archives/texlive-lang-french_2009-3_all.deb /var/cache/apt/archives/texlive-lang-german_2009-3_all.deb /var/cache/apt/archives/texlive-lang-greek_2009-3_all.deb /var/cache/apt/archives/texlive-lang-hebrew_2009-3_all.deb /var/cache/apt/archives/texlive-lang-hungarian_2009-3_all.deb /var/cache/apt/archives/texlive-lang-indic_2009-3_all.deb /var/cache/apt/archives/texlive-lang-italian_2009-3_all.deb /var/cache/apt/archives/texlive-lang-latin_2009-3_all.deb /var/cache/apt/archives/texlive-lang-latvian_2009-3_all.deb /var/cache/apt/archives/texlive-lang-lithuanian_2009-3_all.deb /var/cache/apt/archives/texlive-lang-mongolian_2009-3_all.deb /var/cache/apt/archives/texlive-lang-norwegian_2009-3_all.deb /var/cache/apt/archives/texlive-lang-other_2009-3_all.deb /var/cache/apt/archives/texlive-lang-polish_2009-3_all.deb /var/cache/apt/archives/texlive-lang-portuguese_2009-3_all.deb /var/cache/apt/archives/texlive-lang-spanish_2009-3_all.deb /var/cache/apt/archives/texlive-lang-swedish_2009-3_all.deb /var/cache/apt/archives/texlive-lang-tibetan_2009-3_all.deb /var/cache/apt/archives/texlive-lang-ukenglish_2009-3_all.deb /var/cache/apt/archives/texlive-lang-vietnamese_2009-3_all.deb /var/cache/apt/archives/texlive-latex-base-doc_2009-7_all.deb /var/cache/apt/archives/texlive-latex-base_2009-7_all.deb /var/cache/apt/archives/texlive-latex-extra-doc_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-latex-extra_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-latex-recommended-doc_2009-7_all.deb /var/cache/apt/archives/texlive-latex-recommended_2009-7_all.deb /var/cache/apt/archives/texlive-latex3_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-luatex_2009-7_all.deb /var/cache/apt/archives/texlive-math-extra_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-metapost-doc_2009-7_all.deb /var/cache/apt/archives/texlive-metapost_2009-7_all.deb /var/cache/apt/archives/texlive-music_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-omega_2009-7_all.deb /var/cache/apt/archives/texlive-pictures-doc_2009-7_all.deb /var/cache/apt/archives/texlive-pictures_2009-7_all.deb /var/cache/apt/archives/texlive-plain-extra_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-pstricks-doc_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-pstricks_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-publishers-doc_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-publishers_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-science-doc_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-science_2009-7ubuntu3_all.deb /var/cache/apt/archives/texlive-xetex_2009-7_all.deb /var/cache/apt/archives/texlive_2009-7_all.deb /var/lib/dpkg/info/texlive-base.list /var/lib/dpkg/info/texlive-base.postrm /var/lib/dpkg/info/texlive-bibtex-extra.list /var/lib/dpkg/info/texlive-bibtex-extra.postrm /var/lib/dpkg/info/texlive-doc-base.list /var/lib/dpkg/info/texlive-doc-base.postrm /var/lib/dpkg/info/texlive-doc-bg.list /var/lib/dpkg/info/texlive-doc-bg.postrm /var/lib/dpkg/info/texlive-doc-cs+sk.list /var/lib/dpkg/info/texlive-doc-cs+sk.postrm /var/lib/dpkg/info/texlive-doc-de.list /var/lib/dpkg/info/texlive-doc-de.postrm /var/lib/dpkg/info/texlive-doc-en.list /var/lib/dpkg/info/texlive-doc-en.postrm /var/lib/dpkg/info/texlive-doc-es.list /var/lib/dpkg/info/texlive-doc-es.postrm /var/lib/dpkg/info/texlive-doc-fi.list /var/lib/dpkg/info/texlive-doc-fi.postrm /var/lib/dpkg/info/texlive-doc-fr.list /var/lib/dpkg/info/texlive-doc-fr.postrm /var/lib/dpkg/info/texlive-doc-it.list /var/lib/dpkg/info/texlive-doc-it.postrm /var/lib/dpkg/info/texlive-doc-ja.list /var/lib/dpkg/info/texlive-doc-ja.postrm /var/lib/dpkg/info/texlive-doc-ko.list /var/lib/dpkg/info/texlive-doc-ko.postrm /var/lib/dpkg/info/texlive-doc-mn.list /var/lib/dpkg/info/texlive-doc-mn.postrm /var/lib/dpkg/info/texlive-doc-nl.list /var/lib/dpkg/info/texlive-doc-nl.postrm /var/lib/dpkg/info/texlive-doc-pl.list /var/lib/dpkg/info/texlive-doc-pl.postrm /var/lib/dpkg/info/texlive-doc-pt.list /var/lib/dpkg/info/texlive-doc-pt.postrm /var/lib/dpkg/info/texlive-doc-ru.list /var/lib/dpkg/info/texlive-doc-ru.postrm /var/lib/dpkg/info/texlive-doc-si.list /var/lib/dpkg/info/texlive-doc-si.postrm /var/lib/dpkg/info/texlive-doc-th.list /var/lib/dpkg/info/texlive-doc-th.postrm /var/lib/dpkg/info/texlive-doc-tr.list /var/lib/dpkg/info/texlive-doc-tr.postrm /var/lib/dpkg/info/texlive-doc-uk.list /var/lib/dpkg/info/texlive-doc-uk.postrm /var/lib/dpkg/info/texlive-doc-vi.list /var/lib/dpkg/info/texlive-doc-vi.postrm /var/lib/dpkg/info/texlive-doc-zh.list /var/lib/dpkg/info/texlive-doc-zh.postrm /var/lib/dpkg/info/texlive-extra-utils.list /var/lib/dpkg/info/texlive-extra-utils.postrm /var/lib/dpkg/info/texlive-font-utils.list /var/lib/dpkg/info/texlive-font-utils.postrm /var/lib/dpkg/info/texlive-fonts-extra-doc.list /var/lib/dpkg/info/texlive-fonts-extra-doc.postrm /var/lib/dpkg/info/texlive-fonts-extra.list /var/lib/dpkg/info/texlive-fonts-extra.postrm /var/lib/dpkg/info/texlive-fonts-recommended-doc.list /var/lib/dpkg/info/texlive-fonts-recommended-doc.postrm /var/lib/dpkg/info/texlive-fonts-recommended.list /var/lib/dpkg/info/texlive-fonts-recommended.postrm /var/lib/dpkg/info/texlive-formats-extra.list /var/lib/dpkg/info/texlive-formats-extra.postrm /var/lib/dpkg/info/texlive-games.list /var/lib/dpkg/info/texlive-games.postrm /var/lib/dpkg/info/texlive-generic-extra.list /var/lib/dpkg/info/texlive-generic-extra.postrm /var/lib/dpkg/info/texlive-generic-recommended.list /var/lib/dpkg/info/texlive-generic-recommended.postrm /var/lib/dpkg/info/texlive-humanities-doc.list /var/lib/dpkg/info/texlive-humanities-doc.postrm /var/lib/dpkg/info/texlive-humanities.list /var/lib/dpkg/info/texlive-humanities.postrm /var/lib/dpkg/info/texlive-lang-african.list /var/lib/dpkg/info/texlive-lang-african.postrm /var/lib/dpkg/info/texlive-lang-arabic.list /var/lib/dpkg/info/texlive-lang-arabic.postrm /var/lib/dpkg/info/texlive-lang-armenian.list /var/lib/dpkg/info/texlive-lang-armenian.postrm /var/lib/dpkg/info/texlive-lang-croatian.list /var/lib/dpkg/info/texlive-lang-croatian.postrm /var/lib/dpkg/info/texlive-lang-cyrillic.list /var/lib/dpkg/info/texlive-lang-cyrillic.postrm /var/lib/dpkg/info/texlive-lang-czechslovak.list /var/lib/dpkg/info/texlive-lang-czechslovak.postrm /var/lib/dpkg/info/texlive-lang-danish.list /var/lib/dpkg/info/texlive-lang-danish.postrm /var/lib/dpkg/info/texlive-lang-dutch.list /var/lib/dpkg/info/texlive-lang-dutch.postrm /var/lib/dpkg/info/texlive-lang-finnish.list /var/lib/dpkg/info/texlive-lang-finnish.postrm /var/lib/dpkg/info/texlive-lang-french.list /var/lib/dpkg/info/texlive-lang-french.postrm /var/lib/dpkg/info/texlive-lang-german.list /var/lib/dpkg/info/texlive-lang-german.postrm /var/lib/dpkg/info/texlive-lang-greek.list /var/lib/dpkg/info/texlive-lang-greek.postrm /var/lib/dpkg/info/texlive-lang-hebrew.list /var/lib/dpkg/info/texlive-lang-hebrew.postrm /var/lib/dpkg/info/texlive-lang-hungarian.list /var/lib/dpkg/info/texlive-lang-hungarian.postrm /var/lib/dpkg/info/texlive-lang-indic.list /var/lib/dpkg/info/texlive-lang-indic.postrm /var/lib/dpkg/info/texlive-lang-italian.list /var/lib/dpkg/info/texlive-lang-italian.postrm /var/lib/dpkg/info/texlive-lang-latin.list /var/lib/dpkg/info/texlive-lang-latin.postrm /var/lib/dpkg/info/texlive-lang-latvian.list /var/lib/dpkg/info/texlive-lang-latvian.postrm /var/lib/dpkg/info/texlive-lang-lithuanian.list /var/lib/dpkg/info/texlive-lang-lithuanian.postrm /var/lib/dpkg/info/texlive-lang-mongolian.list /var/lib/dpkg/info/texlive-lang-mongolian.postrm /var/lib/dpkg/info/texlive-lang-norwegian.list /var/lib/dpkg/info/texlive-lang-norwegian.postrm /var/lib/dpkg/info/texlive-lang-other.list /var/lib/dpkg/info/texlive-lang-other.postrm /var/lib/dpkg/info/texlive-lang-polish.list /var/lib/dpkg/info/texlive-lang-polish.postrm /var/lib/dpkg/info/texlive-lang-portuguese.list /var/lib/dpkg/info/texlive-lang-portuguese.postrm /var/lib/dpkg/info/texlive-lang-spanish.list /var/lib/dpkg/info/texlive-lang-spanish.postrm /var/lib/dpkg/info/texlive-lang-swedish.list /var/lib/dpkg/info/texlive-lang-swedish.postrm /var/lib/dpkg/info/texlive-lang-tibetan.list /var/lib/dpkg/info/texlive-lang-tibetan.postrm /var/lib/dpkg/info/texlive-lang-ukenglish.list /var/lib/dpkg/info/texlive-lang-ukenglish.postrm /var/lib/dpkg/info/texlive-lang-vietnamese.list /var/lib/dpkg/info/texlive-lang-vietnamese.postrm /var/lib/dpkg/info/texlive-latex-base-doc.list /var/lib/dpkg/info/texlive-latex-base-doc.postrm /var/lib/dpkg/info/texlive-latex-base.list /var/lib/dpkg/info/texlive-latex-base.postrm /var/lib/dpkg/info/texlive-latex-extra-doc.list /var/lib/dpkg/info/texlive-latex-extra-doc.postrm /var/lib/dpkg/info/texlive-latex-extra.list /var/lib/dpkg/info/texlive-latex-extra.postrm /var/lib/dpkg/info/texlive-latex-recommended-doc.list /var/lib/dpkg/info/texlive-latex-recommended-doc.postrm /var/lib/dpkg/info/texlive-latex-recommended.list /var/lib/dpkg/info/texlive-latex-recommended.postrm /var/lib/dpkg/info/texlive-latex3.list /var/lib/dpkg/info/texlive-latex3.postrm /var/lib/dpkg/info/texlive-luatex.list /var/lib/dpkg/info/texlive-luatex.postrm /var/lib/dpkg/info/texlive-math-extra.list /var/lib/dpkg/info/texlive-math-extra.postrm /var/lib/dpkg/info/texlive-metapost-doc.list /var/lib/dpkg/info/texlive-metapost-doc.postrm /var/lib/dpkg/info/texlive-metapost.list /var/lib/dpkg/info/texlive-metapost.postrm /var/lib/dpkg/info/texlive-music.list /var/lib/dpkg/info/texlive-music.postrm /var/lib/dpkg/info/texlive-omega.list /var/lib/dpkg/info/texlive-omega.postrm /var/lib/dpkg/info/texlive-pictures-doc.list /var/lib/dpkg/info/texlive-pictures-doc.postrm /var/lib/dpkg/info/texlive-pictures.list /var/lib/dpkg/info/texlive-pictures.postrm /var/lib/dpkg/info/texlive-plain-extra.list /var/lib/dpkg/info/texlive-plain-extra.postrm /var/lib/dpkg/info/texlive-pstricks-doc.list /var/lib/dpkg/info/texlive-pstricks-doc.postrm /var/lib/dpkg/info/texlive-pstricks.list /var/lib/dpkg/info/texlive-pstricks.postrm /var/lib/dpkg/info/texlive-publishers-doc.list /var/lib/dpkg/info/texlive-publishers-doc.postrm /var/lib/dpkg/info/texlive-publishers.list /var/lib/dpkg/info/texlive-publishers.postrm /var/lib/dpkg/info/texlive-science-doc.list /var/lib/dpkg/info/texlive-science-doc.postrm /var/lib/dpkg/info/texlive-science.list /var/lib/dpkg/info/texlive-science.postrm /var/lib/dpkg/info/texlive-xetex.list /var/lib/dpkg/info/texlive-xetex.postrm maria@marysia-ubuntu:~$ I've used sudo apt-get autoclean without any change. I've installed deborphan and it showed nothing (maybe I've used it in wrong way: just entered command deborphan). Am I doing something wrong or I was told something which is not true? I would like to know two things: how to remove packages (if I'm doing it in wrong way) and how to clean hard disc from remains of all packages I've uninstalled till now (even if I don't remember what it was exactly). I have Ubuntu Tweak installed but I don't know how to use it and I think I prefere terminal commnands. Thanks

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How-to filter table filter input to only allow numeric input

- by frank.nimphius

In a previous ADF Code Corner post, I explained how to change the table filter behavior by intercepting the query condition in a query filter. See sample #30 at http://www.oracle.com/technetwork/developer-tools/adf/learnmore/index-101235.html In this OTN Harvest post I explain how to prevent users from providing invalid character entries as table filter criteria to avoid problems upon re-querying the table. In the example shown next, only numeric values are allowed for a table column filter. To create a table that allows data filtering, drag a View Object – or a data collection of a Web Service or JPA business service – from the DataControls panel and drop it as a table. Choose the Enable Filtering option in the Edit Table Columns dialog so the table renders with the column filter boxes displayed. The table filter fields are created using implicit af:inputText components that need to be customized for you to apply a custom filter input component, or to change the input behavior. To change the input filter, so only a defined set of input keys is allowed, you need to change the default filter field with your own af:inputText field to which you apply an af:clientListener tag that filters user keyboard entries. For this, in the Oracle JDeveloper visual editor, select the column which filter you want to change and expand the column node in the Oracle JDeveloper Structure Window. Part of the column definition is the Column facet node. Expand the facets so you see the filter facet entry. The filter facet is grayed out as there is no custom facet defined. In a next step, open theComponent Palette (ctrl+shift+P) and drag an Input Text component onto the facet. This demarks the first part in the filter customization. To make the custom filter component work, you need to map the af:inputText component value property to the ADF filter criteria that is exposed in the Expression Builder. Open the Expression Builder for the filter input component value property by clicking the arrow icon to its right. In the Expression Builder expand the JSP Objects | vs | filterCriteria node to select the attribute name represented by the table column. The vs entry is the name of a variable that is defined on the table and that grants you access to the table attributes. Now that the filter works as before – though using a custom filter input component – you can add the af:clientListener tag to your custom filter component – af:inputText – to call out to JavaScript when users type in the column filter field Point the client filter method property to a JavaScript function that you reference or add through using the af:resource tag and set the type property value to keyDown. <af:document id="d1"> <af:resource type="javascript" source="/js/filterHandler.js"/> … The filter definition looks as shown below <af:inputText label="Label 1" id="it1" value="#{vs.filterCriteria.Employe <af:clientListener method="suppressCharacterInput" type="keyDown"/> </af:inputText> The JavaScript code that you can use to either filter character inputs or numeric inputs is shown below. Just store this code in an external JavaScript (.js) file and reference it from the af:resource tag. //Allow numbers, cursor control keys and delete keys function suppressCharacterInput(evt) { var _keyCode = evt.getKeyCode(); var _filterField = evt.getCurrentTarget(); var _oldValue = _filterField.getValue(); if (!((_keyCode < 57) ||(_keyCode > 96 && _keyCode < 105))) { _filterField.setValue(_oldValue); evt.cancel(); } } //Allow characters, cursor control keys and delete keys function suppressNumericInput(evt) { var _keyCode = evt.getKeyCode(); var _filterField = evt.getCurrentTarget(); var _oldValue = _filterField.getValue(); //check for numbers if ((_keyCode < 57 && _keyCode > 47) || (_keyCode > 96 && _keyCode < 105)){ _filterField.setValue(_oldValue); evt.cancel(); } } But what if browsers don't allow JavaScript ? Don't worry about this. If browsers would not support JavaScript then ADF Faces as a whole would not work and you had a different problem.

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Prevent malicious vulnerability scan increasing load on a server

- by Simon

Hi all, this week we have been suffering some malicious vulnerability scans to our servers, increasing the load on them, making them nearly unusable. The attack is easy to defend, just blocking the offending ip, but only after discovering it. Is there any form of prevent it? Is it normal that one server becomes nearly unusable due to one of these scans? These are the requests done in just one second to our server: [Fri Mar 12 19:15:27 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/zope trunk 2 [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/8872fcacd7663c040f0149ed49f572e9 [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/188201 [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/74e118780caa0f5232d6ec393b47ae01 [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/87d4b821b2b6b9706ba6c2950c0eaefd [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/138917 [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/180377 [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/182712 [Fri Mar 12 19:15:28 2010] [error] [client 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/var/www/html/34367 [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/for_collaborators [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/pydeveclipseextensionsfabio [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/usingpdbinipython [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/142264 [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/49003 [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/gamelets [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/texturecoordinatearithmetic [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/project_interface [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/143177 [Fri 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does not exist: /var/www/html/lwedchoice-1999 [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/5099582 [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/100968 [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/j-emacs [Fri Mar 12 19:15:28 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/0206mathew [Fri Mar 12 19:15:29 2010] [error] [client 213.37.49.231] File does not exist: /var/www/html/10844356 Thanks in advance!

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Capturing and Transforming ASP.NET Output with Response.Filter

- by Rick Strahl

During one of my Handlers and Modules session at DevConnections this week one of the attendees asked a question that I didn’t have an immediate answer for. Basically he wanted to capture response output completely and then apply some filtering to the output – effectively injecting some additional content into the page AFTER the page had completely rendered. Specifically the output should be captured from anywhere – not just a page and have this code injected into the page. Some time ago I posted some code that allows you to capture ASP.NET Page output by overriding the Render() method, capturing the HtmlTextWriter() and reading its content, modifying the rendered data as text then writing it back out. I’ve actually used this approach on a few occasions and it works fine for ASP.NET pages. But this obviously won’t work outside of the Page class environment and it’s not really generic – you have to create a custom page class in order to handle the output capture. [updated 11/16/2009 – updated ResponseFilterStream implementation and a few additional notes based on comments] Enter Response.Filter However, ASP.NET includes a Response.Filter which can be used – well to filter output. Basically Response.Filter is a stream through which the OutputStream is piped back to the Web Server (indirectly). As content is written into the Response object, the filter stream receives the appropriate Stream commands like Write, Flush and Close as well as read operations although for a Response.Filter that’s uncommon to be hit. The Response.Filter can be programmatically replaced at runtime which allows you to effectively intercept all output generation that runs through ASP.NET. A common Example: Dynamic GZip Encoding A rather common use of Response.Filter hooking up code based, dynamic GZip compression for requests which is dead simple by applying a GZipStream (or DeflateStream) to Response.Filter. The following generic routines can be used very easily to detect GZip capability of the client and compress response output with a single line of code and a couple of library helper routines: WebUtils.GZipEncodePage(); which is handled with a few lines of reusable code and a couple of static helper methods: /// <summary> ///Sets up the current page or handler to use GZip through a Response.Filter ///IMPORTANT: ///You have to call this method before any output is generated! /// </summary> public static void GZipEncodePage() { HttpResponse Response = HttpContext.Current.Response; if(IsGZipSupported()) { stringAcceptEncoding = HttpContext.Current.Request.Headers["Accept-Encoding"]; if(AcceptEncoding.Contains("deflate")) { Response.Filter = newSystem.IO.Compression.DeflateStream(Response.Filter, System.IO.Compression.CompressionMode.Compress); Response.AppendHeader("Content-Encoding", "deflate"); } else { Response.Filter = newSystem.IO.Compression.GZipStream(Response.Filter, System.IO.Compression.CompressionMode.Compress); Response.AppendHeader("Content-Encoding", "gzip"); } } // Allow proxy servers to cache encoded and unencoded versions separately Response.AppendHeader("Vary", "Content-Encoding"); } /// <summary> /// Determines if GZip is supported /// </summary> /// <returns></returns> public static bool IsGZipSupported() { string AcceptEncoding = HttpContext.Current.Request.Headers["Accept-Encoding"]; if (!string.IsNullOrEmpty(AcceptEncoding) && (AcceptEncoding.Contains("gzip") || AcceptEncoding.Contains("deflate"))) return true; return false; } GZipStream and DeflateStream are streams that are assigned to Response.Filter and by doing so apply the appropriate compression on the active Response. Response.Filter content is chunked So to implement a Response.Filter effectively requires only that you implement a custom stream and handle the Write() method to capture Response output as it’s written. At first blush this seems very simple – you capture the output in Write, transform it and write out the transformed content in one pass. And that indeed works for small amounts of content. But you see, the problem is that output is written in small buffer chunks (a little less than 16k it appears) rather than just a single Write() statement into the stream, which makes perfect sense for ASP.NET to stream data back to IIS in smaller chunks to minimize memory usage en route. Unfortunately this also makes it a more difficult to implement any filtering routines since you don’t directly get access to all of the response content which is problematic especially if those filtering routines require you to look at the ENTIRE response in order to transform or capture the output as is needed for the solution the gentleman in my session asked for. So in order to address this a slightly different approach is required that basically captures all the Write() buffers passed into a cached stream and then making the stream available only when it’s complete and ready to be flushed. As I was thinking about the implementation I also started thinking about the few instances when I’ve used Response.Filter implementations. Each time I had to create a new Stream subclass and create my custom functionality but in the end each implementation did the same thing – capturing output and transforming it. I thought there should be an easier way to do this by creating a re-usable Stream class that can handle stream transformations that are common to Response.Filter implementations. Creating a semi-generic Response Filter Stream Class What I ended up with is a ResponseFilterStream class that provides a handful of Events that allow you to capture and/or transform Response content. The class implements a subclass of Stream and then overrides Write() and Flush() to handle capturing and transformation operations. By exposing events it’s easy to hook up capture or transformation operations via single focused methods. ResponseFilterStream exposes the following events: CaptureStream, CaptureString Captures the output only and provides either a MemoryStream or String with the final page output. Capture is hooked to the Flush() operation of the stream. TransformStream, TransformString Allows you to transform the complete response output with events that receive a MemoryStream or String respectively and can you modify the output then return it back as a return value. The transformed output is then written back out in a single chunk to the response output stream. These events capture all output internally first then write the entire buffer into the response. TransformWrite, TransformWriteString Allows you to transform the Response data as it is written in its original chunk size in the Stream’s Write() method. Unlike TransformStream/TransformString which operate on the complete output, these events only see the current chunk of data written. This is more efficient as there’s no caching involved, but can cause problems due to searched content splitting over multiple chunks. Using this implementation, creating a custom Response.Filter transformation becomes as simple as the following code. To hook up the Response.Filter using the MemoryStream version event: ResponseFilterStream filter = new ResponseFilterStream(Response.Filter); filter.TransformStream += filter_TransformStream; Response.Filter = filter; and the event handler to do the transformation: MemoryStream filter_TransformStream(MemoryStream ms) { Encoding encoding = HttpContext.Current.Response.ContentEncoding; string output = encoding.GetString(ms.ToArray()); output = FixPaths(output); ms = new MemoryStream(output.Length); byte[] buffer = encoding.GetBytes(output); ms.Write(buffer,0,buffer.Length); return ms; } private string FixPaths(string output) { string path = HttpContext.Current.Request.ApplicationPath; // override root path wonkiness if (path == "/") path = ""; output = output.Replace("\"~/", "\"" + path + "/").Replace("'~/", "'" + path + "/"); return output; } The idea of the event handler is that you can do whatever you want to the stream and return back a stream – either the same one that’s been modified or a brand new one – which is then sent back to as the final response. The above code can be simplified even more by using the string version events which handle the stream to string conversions for you: ResponseFilterStream filter = new ResponseFilterStream(Response.Filter); filter.TransformString += filter_TransformString; Response.Filter = filter; and the event handler to do the transformation calling the same FixPaths method shown above: string filter_TransformString(string output) { return FixPaths(output); } The events for capturing output and capturing and transforming chunks work in a very similar way. By using events to handle the transformations ResponseFilterStream becomes a reusable component and we don’t have to create a new stream class or subclass an existing Stream based classed. By the way, the example used here is kind of a cool trick which transforms “~/” expressions inside of the final generated HTML output – even in plain HTML controls not HTML controls – and transforms them into the appropriate application relative path in the same way that ResolveUrl would do. So you can write plain old HTML like this: <a href=”~/default.aspx”>Home</a> and have it turned into: <a href=”/myVirtual/default.aspx”>Home</a> without having to use an ASP.NET control like Hyperlink or Image or having to constantly use: <img src=”<%= ResolveUrl(“~/images/home.gif”) %>” /> in MVC applications (which frankly is one of the most annoying things about MVC especially given the path hell that extension-less and endpoint-less URLs impose). I can’t take credit for this idea. While discussing the Response.Filter issues on Twitter a hint from Dylan Beattie who pointed me at one of his examples which does something similar. I thought the idea was cool enough to use an example for future demos of Response.Filter functionality in ASP.NET next I time I do the Modules and Handlers talk (which was great fun BTW). How practical this is is debatable however since there’s definitely some overhead to using a Response.Filter in general and especially on one that caches the output and the re-writes it later. Make sure to test for performance anytime you use Response.Filter hookup and make sure it' doesn’t end up killing perf on you. You’ve been warned :-}. How does ResponseFilterStream work? The big win of this implementation IMHO is that it’s a reusable component – so for implementation there’s no new class, no subclassing – you simply attach to an event to implement an event handler method with a straight forward signature to retrieve the stream or string you’re interested in. The implementation is based on a subclass of Stream as is required in order to handle the Response.Filter requirements. What’s different than other implementations I’ve seen in various places is that it supports capturing output as a whole to allow retrieving the full response output for capture or modification. The exception are the TransformWrite and TransformWrite events which operate only active chunk of data written by the Response. For captured output, the Write() method captures output into an internal MemoryStream that is cached until writing is complete. So Write() is called when ASP.NET writes to the Response stream, but the filter doesn’t pass on the Write immediately to the filter’s internal stream. The data is cached and only when the Flush() method is called to finalize the Stream’s output do we actually send the cached stream off for transformation (if the events are hooked up) and THEN finally write out the returned content in one big chunk. Here’s the implementation of ResponseFilterStream: /// <summary> /// A semi-generic Stream implementation for Response.Filter with /// an event interface for handling Content transformations via /// Stream or String. /// <remarks> /// Use with care for large output as this implementation copies /// the output into a memory stream and so increases memory usage. /// </remarks> /// </summary> public class ResponseFilterStream : Stream { /// <summary> /// The original stream /// </summary> Stream _stream; /// <summary> /// Current position in the original stream /// </summary> long _position; /// <summary> /// Stream that original content is read into /// and then passed to TransformStream function /// </summary> MemoryStream _cacheStream = new MemoryStream(5000); /// <summary> /// Internal pointer that that keeps track of the size /// of the cacheStream /// </summary> int _cachePointer = 0; /// <summary> /// /// </summary> /// <param name="responseStream"></param> public ResponseFilterStream(Stream responseStream) { _stream = responseStream; } /// <summary> /// Determines whether the stream is captured /// </summary> private bool IsCaptured { get { if (CaptureStream != null || CaptureString != null || TransformStream != null || TransformString != null) return true; return false; } } /// <summary> /// Determines whether the Write method is outputting data immediately /// or delaying output until Flush() is fired. /// </summary> private bool IsOutputDelayed { get { if (TransformStream != null || TransformString != null) return true; return false; } } /// <summary> /// Event that captures Response output and makes it available /// as a MemoryStream instance. Output is captured but won't /// affect Response output. /// </summary> public event Action<MemoryStream> CaptureStream; /// <summary> /// Event that captures Response output and makes it available /// as a string. Output is captured but won't affect Response output. /// </summary> public event Action<string> CaptureString; /// <summary> /// Event that allows you transform the stream as each chunk of /// the output is written in the Write() operation of the stream. /// This means that that it's possible/likely that the input /// buffer will not contain the full response output but only /// one of potentially many chunks. /// /// This event is called as part of the filter stream's Write() /// operation. /// </summary> public event Func<byte[], byte[]> TransformWrite; /// <summary> /// Event that allows you to transform the response stream as /// each chunk of bytep[] output is written during the stream's write /// operation. This means it's possibly/likely that the string /// passed to the handler only contains a portion of the full /// output. Typical buffer chunks are around 16k a piece. /// /// This event is called as part of the stream's Write operation. /// </summary> public event Func<string, string> TransformWriteString; /// <summary> /// This event allows capturing and transformation of the entire /// output stream by caching all write operations and delaying final /// response output until Flush() is called on the stream. /// </summary> public event Func<MemoryStream, MemoryStream> TransformStream; /// <summary> /// Event that can be hooked up to handle Response.Filter /// Transformation. Passed a string that you can modify and /// return back as a return value. The modified content /// will become the final output. /// </summary> public event Func<string, string> TransformString; protected virtual void OnCaptureStream(MemoryStream ms) { if (CaptureStream != null) CaptureStream(ms); } private void OnCaptureStringInternal(MemoryStream ms) { if (CaptureString != null) { string content = HttpContext.Current.Response.ContentEncoding.GetString(ms.ToArray()); OnCaptureString(content); } } protected virtual void OnCaptureString(string output) { if (CaptureString != null) CaptureString(output); } protected virtual byte[] OnTransformWrite(byte[] buffer) { if (TransformWrite != null) return TransformWrite(buffer); return buffer; } private byte[] OnTransformWriteStringInternal(byte[] buffer) { Encoding encoding = HttpContext.Current.Response.ContentEncoding; string output = OnTransformWriteString(encoding.GetString(buffer)); return encoding.GetBytes(output); } private string OnTransformWriteString(string value) { if (TransformWriteString != null) return TransformWriteString(value); return value; } protected virtual MemoryStream OnTransformCompleteStream(MemoryStream ms) { if (TransformStream != null) return TransformStream(ms); return ms; } /// <summary> /// Allows transforming of strings /// /// Note this handler is internal and not meant to be overridden /// as the TransformString Event has to be hooked up in order /// for this handler to even fire to avoid the overhead of string /// conversion on every pass through. /// </summary> /// <param name="responseText"></param> /// <returns></returns> private string OnTransformCompleteString(string responseText) { if (TransformString != null) TransformString(responseText); return responseText; } /// <summary> /// Wrapper method form OnTransformString that handles /// stream to string and vice versa conversions /// </summary> /// <param name="ms"></param> /// <returns></returns> internal MemoryStream OnTransformCompleteStringInternal(MemoryStream ms) { if (TransformString == null) return ms; //string content = ms.GetAsString(); string content = HttpContext.Current.Response.ContentEncoding.GetString(ms.ToArray()); content = TransformString(content); byte[] buffer = HttpContext.Current.Response.ContentEncoding.GetBytes(content); ms = new MemoryStream(); ms.Write(buffer, 0, buffer.Length); //ms.WriteString(content); return ms; } /// <summary> /// /// </summary> public override bool CanRead { get { return true; } } public override bool CanSeek { get { return true; } } /// <summary> /// /// </summary> public override bool CanWrite { get { return true; } } /// <summary> /// /// </summary> public override long Length { get { return 0; } } /// <summary> /// /// </summary> public override long Position { get { return _position; } set { _position = value; } } /// <summary> /// /// </summary> /// <param name="offset"></param> /// <param name="direction"></param> /// <returns></returns> public override long Seek(long offset, System.IO.SeekOrigin direction) { return _stream.Seek(offset, direction); } /// <summary> /// /// </summary> /// <param name="length"></param> public override void SetLength(long length) { _stream.SetLength(length); } /// <summary> /// /// </summary> public override void Close() { _stream.Close(); } /// <summary> /// Override flush by writing out the cached stream data /// </summary> public override void Flush() { if (IsCaptured && _cacheStream.Length > 0) { // Check for transform implementations _cacheStream = OnTransformCompleteStream(_cacheStream); _cacheStream = OnTransformCompleteStringInternal(_cacheStream); OnCaptureStream(_cacheStream); OnCaptureStringInternal(_cacheStream); // write the stream back out if output was delayed if (IsOutputDelayed) _stream.Write(_cacheStream.ToArray(), 0, (int)_cacheStream.Length); // Clear the cache once we've written it out _cacheStream.SetLength(0); } // default flush behavior _stream.Flush(); } /// <summary> /// /// </summary> /// <param name="buffer"></param> /// <param name="offset"></param> /// <param name="count"></param> /// <returns></returns> public override int Read(byte[] buffer, int offset, int count) { return _stream.Read(buffer, offset, count); } /// <summary> /// Overriden to capture output written by ASP.NET and captured /// into a cached stream that is written out later when Flush() /// is called. /// </summary> /// <param name="buffer"></param> /// <param name="offset"></param> /// <param name="count"></param> public override void Write(byte[] buffer, int offset, int count) { if ( IsCaptured ) { // copy to holding buffer only - we'll write out later _cacheStream.Write(buffer, 0, count); _cachePointer += count; } // just transform this buffer if (TransformWrite != null) buffer = OnTransformWrite(buffer); if (TransformWriteString != null) buffer = OnTransformWriteStringInternal(buffer); if (!IsOutputDelayed) _stream.Write(buffer, offset, buffer.Length); } } The key features are the events and corresponding OnXXX methods that handle the event hookups, and the Write() and Flush() methods of the stream implementation. All the rest of the members tend to be plain jane passthrough stream implementation code without much consequence. I do love the way Action<t> and Func<T> make it so easy to create the event signatures for the various events – sweet. A few Things to consider Performance Response.Filter is not great for performance in general as it adds another layer of indirection to the ASP.NET output pipeline, and this implementation in particular adds a memory hit as it basically duplicates the response output into the cached memory stream which is necessary since you may have to look at the entire response. If you have large pages in particular this can cause potentially serious memory pressure in your server application. So be careful of wholesale adoption of this (or other) Response.Filters. Make sure to do some performance testing to ensure it’s not killing your app’s performance. Response.Filter works everywhere A few questions came up in comments and discussion as to capturing ALL output hitting the site and – yes you can definitely do that by assigning a Response.Filter inside of a module. If you do this however you’ll want to be very careful and decide which content you actually want to capture especially in IIS 7 which passes ALL content – including static images/CSS etc. through the ASP.NET pipeline. So it is important to filter only on what you’re looking for – like the page extension or maybe more effectively the Response.ContentType. Response.Filter Chaining Originally I thought that filter chaining doesn’t work at all due to a bug in the stream implementation code. But it’s quite possible to assign multiple filters to the Response.Filter property. So the following actually works to both compress the output and apply the transformed content: WebUtils.GZipEncodePage(); ResponseFilterStream filter = new ResponseFilterStream(Response.Filter); filter.TransformString += filter_TransformString; Response.Filter = filter; However the following does not work resulting in invalid content encoding errors: ResponseFilterStream filter = new ResponseFilterStream(Response.Filter); filter.TransformString += filter_TransformString; Response.Filter = filter; WebUtils.GZipEncodePage(); In other words multiple Response filters can work together but it depends entirely on the implementation whether they can be chained or in which order they can be chained. In this case running the GZip/Deflate stream filters apparently relies on the original content length of the output and chokes when the content is modified. But if attaching the compression first it works fine as unintuitive as that may seem. Resources Download example code Capture Output from ASP.NET Pages © Rick Strahl, West Wind Technologies, 2005-2010Posted in ASP.NET

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Subterranean IL: Filter exception handlers

- by Simon Cooper

Filter handlers are the second type of exception handler that aren't accessible from C#. Unlike the other handler types, which have defined conditions for when the handlers execute, filter lets you use custom logic to determine whether the handler should be run. However, similar to a catch block, the filter block does not get run if control flow exits the block without throwing an exception. Introducing filter blocks An example of a filter block in IL is the following: .try { // try block } filter { // filter block endfilter }{ // filter handler } or, in v1 syntax, TryStart: // try block TryEnd: FilterStart: // filter block HandlerStart: // filter handler HandlerEnd: .try TryStart to TryEnd filter FilterStart handler HandlerStart to HandlerEnd In the v1 syntax there is no end label specified for the filter block. This is because the filter block must come immediately before the filter handler; the end of the filter block is the start of the filter handler. The filter block indicates to the CLR whether the filter handler should be executed using a boolean value on the stack when the endfilter instruction is run; true/non-zero if it is to be executed, false/zero if it isn't. At the start of the filter block, and the corresponding filter handler, a reference to the exception thrown is pushed onto the stack as a raw object (you have to manually cast to System.Exception). The allowed IL inside a filter block is tightly controlled; you aren't allowed branches outside the block, rethrow instructions, and other exception handling clauses. You can, however, use call and callvirt instructions to call other methods. Filter block logic To demonstrate filter block logic, in this example I'm filtering on whether there's a particular key in the Data dictionary of the thrown exception: .try { // try block } filter { // Filter starts with exception object on stack // C# code: ((Exception)e).Data.Contains("MyExceptionDataKey") // only execute handler if Contains returns true castclass [mscorlib]System.Exception callvirt instance class [mscorlib]System.Collections.IDictionary [mscorlib]System.Exception::get_Data() ldstr "MyExceptionDataKey" callvirt instance bool [mscorlib]System.Collections.IDictionary::Contains(object) endfilter }{ // filter handler // Also starts off with exception object on stack callvirt instance string [mscorlib]System.Object::ToString() call void [mscorlib]System.Console::WriteLine(string) } Conclusion Filter exception handlers are another exception handler type that isn't accessible from C#, however, just like fault handlers, the behaviour can be replicated using a normal catch block: try { // try block } catch (Exception e) { if (!FilterLogic(e)) throw; // handler logic } So, it's not that great a loss, but it's still annoying that this functionality isn't directly accessible. Well, every feature starts off with minus 100 points, so it's understandable why something like this didn't make it into the C# compiler ahead of a different feature.

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What is the default file system of /var/run, /var/lock

- by Casey

Trying to figure out if my /var/run is using disk or not. See the command output: $ df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg0-root 40G 15G 26G 36% / none 3.9G 340K 3.9G 1% /dev none 3.9G 1.1M 3.9G 1% /dev/shm tmpfs 3.9G 600K 3.9G 1% /tmp none 3.9G 452K 3.9G 1% /var/run none 3.9G 0 3.9G 0% /var/lock none 3.9G 0 3.9G 0% /lib/init/rw /dev/md0 236M 59M 165M 27% /boot /dev/mapper/vg0-home 60G 58G 2.3G 97% /home

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YUM Update Failed - Error in POSTIN scriptlet in rpm package

- by Tiffany Walker

Running "yum update" and it gets to installing and then breaks. Not sure what the problem is. Google shows nothing. Error in POSTIN scriptlet in rpm package gtk2-2.18.9-10.el6.x86_64 error: error creating temporary file /var/tmp/rpm-tmp.NB84HC: Invalid argument error: Couldn't create temporary file for %post(gtk2-2.18.9-10.el6.x86_64): Invalid argument Updating : e2fsprogs-libs-1.41.12-12.el6.x86_64 44/378 Traceback (most recent call last): File "/usr/lib/python2.6/site-packages/yum/rpmtrans.py", line 387, in callback self._instCloseFile( bytes, total, h ) File "/usr/lib/python2.6/site-packages/yum/rpmtrans.py", line 463, in _instCloseFile self.base.history.trans_data_pid_end(pid, state) File "/usr/lib/python2.6/site-packages/yum/history.py", line 858, in trans_data_pid_end """, ('TRUE', self._tid, pid, state)) File "/usr/lib/python2.6/site-packages/yum/sqlutils.py", line 168, in executeSQLQmark return cursor.execute(query, params) sqlite3.OperationalError: unable to open database file error: python callback <bound method RPMTransaction.callback of <yum.rpmtrans.RPMTransaction instance at 0x45c2290>> failed, aborting! With a check all: yum check Loaded plugins: fastestmirror, rhnplugin, security MySQL-client-5.5.27-1.cp.1132.x86_64 is obsoleted by MySQL-client-5.5.27-1.cp.1132.x86_64 MySQL-server-5.5.27-1.cp.1132.x86_64 is obsoleted by MySQL-server-5.5.27-1.cp.1132.x86_64 abrt-libs-2.0.8-6.el6.x86_64 is a duplicate with abrt-libs-2.0.4-14.el6.centos.x86_64 audit-libs-2.2-2.el6.x86_64 is a duplicate with audit-libs-2.1.3-3.el6.x86_64 bandmin-1.6.1-5.noarch has missing requires of perl(bandmin.conf) bandmin-1.6.1-5.noarch has missing requires of perl(bmversion.pl) bandmin-1.6.1-5.noarch has missing requires of perl(services.conf) 32:bind-libs-9.8.2-0.10.rc1.el6_3.3.x86_64 is a duplicate with 32:bind-libs-9.7.3-8.P3.el6_2.2.x86_64 cagefs-safebin-3.6-6.el6.cloudlinux.x86_64 is a duplicate with cagefs-safebin-3.5-1.el6.cloudlinux.x86_64 chkconfig-1.3.49.3-2.el6.x86_64 is a duplicate with chkconfig-1.3.49.3-1.el6_2.x86_64 cloudlinux-release-6-6.3.0.x86_64 is a duplicate with cloudlinux-release-6-6.2.2.x86_64 coreutils-8.4-19.el6.x86_64 is a duplicate with coreutils-8.4-16.el6.x86_64 coreutils-libs-8.4-19.el6.x86_64 is a duplicate with coreutils-libs-8.4-16.el6.x86_64 1:cups-libs-1.4.2-48.el6_3.1.x86_64 is a duplicate with 1:cups-libs-1.4.2-44.el6_2.3.x86_64 1:dbus-libs-1.2.24-7.el6_3.x86_64 is a duplicate with 1:dbus-libs-1.2.24-5.el6_1.x86_64 12:dhcp-common-4.1.1-31.P1.el6_3.1.x86_64 is a duplicate with 12:dhcp-common-4.1.1-25.P1.el6_2.1.x86_64 e2fsprogs-libs-1.41.12-12.el6.x86_64 is a duplicate with e2fsprogs-libs-1.41.12-11.el6.x86_64 exim-4.80-0.x86_64 has missing requires of perl(SafeFile) expat-2.0.1-11.el6_2.x86_64 is a duplicate with expat-2.0.1-9.1.el6.x86_64 frontpage-2002-SR1.2.i386 has missing requires of libexpat.so.0 gawk-3.1.7-10.el6.x86_64 is a duplicate with gawk-3.1.7-9.el6.x86_64 glib2-2.22.5-7.el6.x86_64 is a duplicate with glib2-2.22.5-6.el6.x86_64 glibc-2.12-1.80.el6_3.5.x86_64 is a duplicate with glibc-2.12-1.47.el6_2.12.x86_64 glibc-common-2.12-1.80.el6_3.5.x86_64 is a duplicate with glibc-common-2.12-1.47.el6_2.12.x86_64 gtk2-2.18.9-10.el6.x86_64 is a duplicate with gtk2-2.18.9-6.el6.centos.x86_64 kernel-firmware-2.6.32-320.4.1.lve1.1.4.el6.noarch is obsoleted by kernel-firmware-2.6.32-320.4.1.lve1.1.4.el6.noarch kernel-firmware-2.6.32-320.4.1.lve1.1.4.el6.noarch is obsoleted by kernel-firmware-2.6.32-379.5.1.lve1.1.9.6.1.el6.noarch kernel-firmware-2.6.32-379.5.1.lve1.1.9.6.1.el6.noarch is a duplicate with kernel-firmware-2.6.32-320.4.1.lve1.1.4.el6.noarch kernel-firmware-2.6.32-379.5.1.lve1.1.9.6.1.el6.noarch is obsoleted by kernel-firmware-2.6.32-320.4.1.lve1.1.4.el6.noarch kernel-firmware-2.6.32-379.5.1.lve1.1.9.6.1.el6.noarch is obsoleted by kernel-firmware-2.6.32-379.5.1.lve1.1.9.6.1.el6.noarch kernel-headers-2.6.32-379.5.1.lve1.1.9.6.1.el6.x86_64 is a duplicate with kernel-headers-2.6.32-320.4.1.lve1.1.4.el6.x86_64 keyutils-libs-1.4-4.el6.x86_64 is a duplicate with keyutils-libs-1.4-3.el6.x86_64 krb5-libs-1.9-33.el6_3.3.x86_64 is a duplicate with krb5-libs-1.9-22.el6_2.1.x86_64 libblkid-2.17.2-12.7.el6.x86_64 is a duplicate with libblkid-2.17.2-12.4.el6.x86_64 libcom_err-1.41.12-12.el6.x86_64 is a duplicate with libcom_err-1.41.12-11.el6.x86_64 libgcc-4.4.6-4.el6.x86_64 is a duplicate with libgcc-4.4.6-3.el6.x86_64 libselinux-2.0.94-5.3.el6.x86_64 is a duplicate with libselinux-2.0.94-5.2.el6.x86_64 libstdc++-4.4.6-4.el6.x86_64 is a duplicate with libstdc++-4.4.6-3.el6.x86_64 libtiff-3.9.4-6.el6_3.x86_64 is a duplicate with libtiff-3.9.4-5.el6_2.x86_64 libudev-147-2.42.el6.x86_64 is a duplicate with libudev-147-2.40.el6.x86_64 libuuid-2.17.2-12.7.el6.x86_64 is a duplicate with libuuid-2.17.2-12.4.el6.x86_64 libxml2-2.7.6-8.el6_3.3.x86_64 is a duplicate with libxml2-2.7.6-4.el6_2.4.x86_64 nspr-4.9.1-2.el6_3.x86_64 is a duplicate with nspr-4.8.9-3.el6_2.x86_64 nss-util-3.13.5-1.el6_3.x86_64 is a duplicate with nss-util-3.13.1-3.el6_2.x86_64 openssl-1.0.0-25.el6_3.1.x86_64 is a duplicate with openssl-1.0.0-20.el6_2.5.x86_64 python-2.6.6-29.el6_3.3.x86_64 is a duplicate with python-2.6.6-29.el6.x86_64 python-libs-2.6.6-29.el6_3.3.x86_64 is a duplicate with python-libs-2.6.6-29.el6.x86_64 readline-6.0-4.el6.x86_64 is a duplicate with readline-6.0-3.el6.x86_64 sed-4.2.1-10.el6.x86_64 is a duplicate with sed-4.2.1-7.el6.x86_64 tzdata-2012c-3.el6.noarch is a duplicate with tzdata-2012c-1.el6.noarch xmlrpc-c-1.16.24-1209.1840.el6.x86_64 is a duplicate with xmlrpc-c-1.16.24-1200.1840.el6_1.4.x86_64 xmlrpc-c-client-1.16.24-1209.1840.el6.x86_64 is a duplicate with xmlrpc-c-client-1.16.24-1200.1840.el6_1.4.x86_64 Error: check all Tried: #rm /var/lib/rpm/__db* #rpm --rebuilddb #yum clean all Tried also running yum-complete-transaction still won't finish the update. ls -ld /var/tmp/ drwxrwxrwt. 20 root root 12288 Oct 3 18:44 /var/tmp/ df -h /var/tmp/ Filesystem Size Used Avail Use% Mounted on /tmp 3.9G 1.2G 2.6G 32% /var/tmp Latest errors: Error: Protected multilib versions: libgcc-4.4.6-4.el6.i686 != libgcc-4.4.6-3.el6.x86_64 Error: Protected multilib versions: glibc-2.12-1.80.el6_3.5.i686 != glibc-2.12-1.47.el6_2.12.x86_64 EDITED: yum repolist Loaded plugins: fastestmirror, rhnplugin, security Loading mirror speeds from cached hostfile * cloudlinux-x86_64-server-6: cl.banahosting.com repo id repo name status cloudlinux-x86_64-server-6 CloudLinux Server 6 x86_64 10,948+725 repolist: 10,948 [~]# package-cleanup --dupes Loaded plugins: fastestmirror, rhnplugin xmlrpc-c-client-1.16.24-1209.1840.el6.x86_64 xmlrpc-c-client-1.16.24-1200.1840.el6_1.4.x86_64 bind-libs-9.7.3-8.P3.el6_2.2.x86_64 bind-libs-9.8.2-0.10.rc1.el6_3.3.x86_64 libblkid-2.17.2-12.4.el6.x86_64 libblkid-2.17.2-12.7.el6.x86_64 libtiff-3.9.4-5.el6_2.x86_64 libtiff-3.9.4-6.el6_3.x86_64 audit-libs-2.1.3-3.el6.x86_64 audit-libs-2.2-2.el6.x86_64 libstdc++-4.4.6-3.el6.x86_64 libstdc++-4.4.6-4.el6.x86_64 sed-4.2.1-10.el6.x86_64 sed-4.2.1-7.el6.x86_64 python-libs-2.6.6-29.el6_3.3.x86_64 python-libs-2.6.6-29.el6.x86_64 coreutils-libs-8.4-16.el6.x86_64 coreutils-libs-8.4-19.el6.x86_64 libudev-147-2.40.el6.x86_64 libudev-147-2.42.el6.x86_64 chkconfig-1.3.49.3-2.el6.x86_64 chkconfig-1.3.49.3-1.el6_2.x86_64 keyutils-libs-1.4-4.el6.x86_64 keyutils-libs-1.4-3.el6.x86_64 glibc-2.12-1.47.el6_2.12.x86_64 glibc-2.12-1.80.el6_3.5.x86_64 tzdata-2012c-3.el6.noarch tzdata-2012c-1.el6.noarch coreutils-8.4-19.el6.x86_64 coreutils-8.4-16.el6.x86_64 dbus-libs-1.2.24-7.el6_3.x86_64 dbus-libs-1.2.24-5.el6_1.x86_64 libxml2-2.7.6-4.el6_2.4.x86_64 libxml2-2.7.6-8.el6_3.3.x86_64 abrt-libs-2.0.8-6.el6.x86_64 abrt-libs-2.0.4-14.el6.centos.x86_64 expat-2.0.1-9.1.el6.x86_64 expat-2.0.1-11.el6_2.x86_64 python-2.6.6-29.el6.x86_64 python-2.6.6-29.el6_3.3.x86_64 gtk2-2.18.9-6.el6.centos.x86_64 gtk2-2.18.9-10.el6.x86_64 libcom_err-1.41.12-12.el6.x86_64 libcom_err-1.41.12-11.el6.x86_64 gawk-3.1.7-10.el6.x86_64 gawk-3.1.7-9.el6.x86_64 readline-6.0-4.el6.x86_64 readline-6.0-3.el6.x86_64 glibc-common-2.12-1.80.el6_3.5.x86_64 glibc-common-2.12-1.47.el6_2.12.x86_64 libselinux-2.0.94-5.2.el6.x86_64 libselinux-2.0.94-5.3.el6.x86_64 cups-libs-1.4.2-48.el6_3.1.x86_64 cups-libs-1.4.2-44.el6_2.3.x86_64 nspr-4.9.1-2.el6_3.x86_64 nspr-4.8.9-3.el6_2.x86_64 cagefs-safebin-3.5-1.el6.cloudlinux.x86_64 cagefs-safebin-3.6-6.el6.cloudlinux.x86_64 libuuid-2.17.2-12.4.el6.x86_64 libuuid-2.17.2-12.7.el6.x86_64 xmlrpc-c-1.16.24-1209.1840.el6.x86_64 xmlrpc-c-1.16.24-1200.1840.el6_1.4.x86_64 openssl-1.0.0-20.el6_2.5.x86_64 openssl-1.0.0-25.el6_3.1.x86_64 dhcp-common-4.1.1-25.P1.el6_2.1.x86_64 dhcp-common-4.1.1-31.P1.el6_3.1.x86_64 krb5-libs-1.9-33.el6_3.3.x86_64 krb5-libs-1.9-22.el6_2.1.x86_64 nss-util-3.13.5-1.el6_3.x86_64 nss-util-3.13.1-3.el6_2.x86_64 cloudlinux-release-6-6.2.2.x86_64 cloudlinux-release-6-6.3.0.x86_64 e2fsprogs-libs-1.41.12-11.el6.x86_64 e2fsprogs-libs-1.41.12-12.el6.x86_64 glib2-2.22.5-6.el6.x86_64 glib2-2.22.5-7.el6.x86_64 UPDATE 2 I removed all the dupes and then did update and got this: Updating : sudo-1.7.4p5-13.el6_3.x86_64 79/361 Error in POSTIN scriptlet in rpm package sudo-1.7.4p5-13.el6_3.x86_64 warning: /etc/sudoers created as /etc/sudoers.rpmnew error: error creating temporary file /var/tmp/rpm-tmp.hjTOqJ: Invalid argument error: Couldn't create temporary file for %post(sudo-1.7.4p5-13.el6_3.x86_64): Invalid argument Updating : pcre-7.8-6.el6.x86_64 80/361 Traceback (most recent call last): File "/usr/lib/python2.6/site-packages/yum/rpmtrans.py", line 399, in callback self._instCloseFile( bytes, total, h ) File "/usr/lib/python2.6/site-packages/yum/rpmtrans.py", line 475, in _instCloseFile self.base.history.trans_data_pid_end(pid, state) File "/usr/lib/python2.6/site-packages/yum/history.py", line 858, in trans_data_pid_end """, ('TRUE', self._tid, pid, state)) File "/usr/lib/python2.6/site-packages/yum/sqlutils.py", line 168, in executeSQLQmark return cursor.execute(query, params) sqlite3.OperationalError: unable to open database file error: python callback <bound method RPMTransaction.callback of <yum.rpmtrans.RPMTransaction instance at 0x5c7cfc8>> failed, aborting! - [~]# lsattr /var/tmp/ -------------e- /var/tmp/cache_5b07945563e03aec1c44917886fd99a6 -------------e- /var/tmp/sess_6edfafda1a191f6986bd020ed945eea0 -------------e- /var/tmp/sess_1b837feecdd4c9e6aa6ecd81d41fda75 -------------e- /var/tmp/sess_70bec5f392b4f5f75ac444f5c82db2dc -------------e- /var/tmp/sess_24cd226ba0a370a6d3838a37745b2e15 -------------e- /var/tmp/nginx_proxy -------------e- /var/tmp/sess_19fb1dd060e42c9de8786ef34d7fcf6e -------------e- /var/tmp/sess_b4ac777076c5122a6e27d776de0a2fcb -------------e- /var/tmp/sess_5077441775ef8d07a2185e8fd48a4aa8 -------------e- /var/tmp/cache_4e71d930fe8250e222ae4d1dc39646ff -------------e- /var/tmp/sess_eb6eb29b38b55b85303c3137611f0a2faa15c21d -------------e- /var/tmp/sess_81e7e8d93b395f2c8d7e3fe12cc59e56 -------------e- /var/tmp/sess_05c7f305bdbf9a4c7af251d33ac59766 -------------e- /var/tmp/sess_0ad9369063a37b6b399688a835d69ed2 -------------e- /var/tmp/cache_c780deda617678faeea8f8a34395ac27 -------------e- /var/tmp/sess_9773332e3c99ee18dca0b05e8f02a41e -------------e- /var/tmp/sess_1d9b02b068ea81a3975599ddc12bcfb1 -------------e- /var/tmp/sess_1ffeff444123e924834dc5e80d07571e -------------e- /var/tmp/sess_aa56725471c84d9a06745c56dc499db7 -------------e- /var/tmp/sess_51e19964d7e1a164c63f4c72fa43475c33debbc0 -------------e- /var/tmp/sess_a83c7a05bb189a465b8813ff9e566aa8f9124079 -------------e- /var/tmp/sess_2f506ba5b77c61107871e8cf80393cdb -------------e- /var/tmp/sess_7bfe1578605b259ec5e4fd2200df4cd0 -------------e- /var/tmp/sess_f6e47011789d8d48d56dd78a398d98d5719414a7 -------------e- /var/tmp/sess_b7c43a90a8b8d8f02b0fffca77796ce5 -------------e- /var/tmp/sess_6c3e7103453ad4daba815bd96a903785 -------------e- /var/tmp/sess_86f32a22507d8410b3f0fc7d71a135d5 -------------e- /var/tmp/sess_aaf72d3e8cfb2f27ffdff61323f97e7553855a05 -------------e- /var/tmp/sess_5de4488e2ee03ac0f99ab9494573ccb1 -------------e- /var/tmp/sess_716d97bba4abdb38704a9e4212f6fddc -------------e- /var/tmp/sess_534908a9510a32eda13a5dc95ac022cc -------------e- /var/tmp/sess_626a58203d93427c79621ea4fec0906d -------------e- /var/tmp/sess_827ca92d10d3797f2c187c41764a7036 -------------e- /var/tmp/sess_6282962d77f7bead20e785fbdb9a3d8f -------------e- /var/tmp/cache_b012c8a729fc54a296a700ed92930a0e -------------e- /var/tmp/sess_631e5ba769773da056108d3fbd143963 -------------e- /var/tmp/cache_30bb7f1333ba5f96a229c91a3385d8b5 -------------e- /var/tmp/sess_93e085706b29c3e4e3593bfe39b1079e -------------e- /var/tmp/sess_abd78bd6c285d681c90de8c617747ab3 -------------e- /var/tmp/sess_e144544ed925569018e6607b05f43f253f75e2aa -------------e- /var/tmp/sess_5d3d036c772847a4508d3e100b173d84 -------------e- /var/tmp/sess_f35243d1f40bd8d9ce08940fafc00d93 -------------e- /var/tmp/sess_761c3ffa811b959638ed0b266741eaa4 -------------e- /var/tmp/mm.sem.sNdxjf -------------e- /var/tmp/sess_006d45dbd807291f7bffbd1db3707ed6 -------------e- /var/tmp/cache_2d0162aac9f87c1978ac644923a5e2fe -------------e- /var/tmp/sess_22c534418c380b72d105935b59713dd1 -------------e- /var/tmp/sess_94f72ef408567a15f6287c518e93898e -------------e- /var/tmp/cache_6fe03c83bb87489f3921db1c974dfc0e -------------e- /var/tmp/sess_48bbfa2a2a8793a62c7fd6a389a2763e -------------e- /var/tmp/mm.sem.ERERMV -------------e- /var/tmp/sess_20aba82c03a69b2dc6af66c499c38ee67e27368f -------------e- /var/tmp/sess_f94fe0589a79c934815ef359bcb0a16c7080d937 -------------e- /var/tmp/sess_460390801eb004593b4dee83779f414e -------------e- /var/tmp/spamd-52811-init -------------e- /var/tmp/cache_6427fdb235d59b0b2fbd105bf23d2e87 -------------e- /var/tmp/cache_4ce12d8350d7c0361dc1bf15d552a2d8 -------------e- /var/tmp/sess_039fec2a643340f118b6355e4c836ae8 -------------e- /var/tmp/sess_fa46fa80b26e6cf3d9c7de942d5dbcff -------------e- /var/tmp/cache_664858e614367812148716536e22d030 -------------e- /var/tmp/sess_4c8d4c44fbd828dc17415ce6aa213115 -------------e- /var/tmp/sess_d231a6c0e5dd4d7bacbf9de3d8bb298f -------------e- /var/tmp/sess_a82f8a088a8e37d375f6a9fede4a54d2 -------------e- /var/tmp/sess_604697227ae5359e5783dc9407845338 -------------e- /var/tmp/sess_5b4e623536640abe671b40563d03817d -------------e- /var/tmp/sess_2aba0aff64f3c18f22e0b79d591259e2 -------------e- /var/tmp/sess_bfd52a2d2d80880f8e26ad460739a0494f0d1e9e -------------e- /var/tmp/sess_ba9f3e3a7c7111930d6b801aaa833b46 -------------e- /var/tmp/sess_5cc8c5b620015a465359359a0805fbdd -------------e- /var/tmp/sess_84945c41d604b4653a1bf45d83a1917c -------------e- /var/tmp/sess_5f52569b27430780c07d25cfb8177e5c1ef647f0 -------------e- /var/tmp/sess_45896aef9e77f16be1b3e94b3edb2599 -------------e- /var/tmp/sess_5a67d0ef8f826a2f103b429c8464bdd5f75d6218 -------------e- /var/tmp/sess_1fce98bb32e5b34c79fd5a313de32980 -------------e- /var/tmp/sess_f7ea772ff3fbb1eb2ad8712dd2c49ed8 -------------e- /var/tmp/sess_a9dc16bc5c1eb2768bb2600f0d102fde -------------e- /var/tmp/mm.sem.3zwRTu -------------e- /var/tmp/sess_e2cad140703338a4b8c9254ec6b0a1a2 -------------e- /var/tmp/sess_e7c8e85daf9c5424aecb83e066decf31 -------------e- /var/tmp/sess_800f878fa944370f42e76057e7c033e19520bd41 -------------e- /var/tmp/sess_4fdae64eb18599521ace18679795568b -------------e- /var/tmp/sess_958fb886b97de2e767b059376c4724b5 -------------e- /var/tmp/sess_3c832a31f17744a8bb3c59dde02e561aefbc2e48 -------------e- /var/tmp/sess_6d9d7bf04f34e0d82b101f882196a905 -------------e- /var/tmp/sess_7231c75ae4fad2ca5fbcb6de430a7b13 -------------e- /var/tmp/sess_2eadffa2285def9673ce784395d272d8 -------------e- /var/tmp/cache_2ff353b664d8028df967f807ac18593a -------------e- /var/tmp/sess_4138a267f1f5e3ad93c1d64547c63134ae7c0db3 -------------e- /var/tmp/sess_64cd9fa0d6af8e8041aafffbe3db986a -------------e- /var/tmp/tmpg3ycIG -------------e- /var/tmp/cache_b633ac8283d6de8e39d81160d63fc8cd -------------e- /var/tmp/sess_2cee03cf5eafd3ef55d8efa1b0390436 -------------e- /var/tmp/sess_608066c609e28621f2a29ac04a3a6441 -------------e- /var/tmp/sess_46dfb35cf8266699ba9304e5d8c6869d -------------e- /var/tmp/sess_fb202a0ed54cee8832c5f6e0ca7fc1b3 -------------e- /var/tmp/sess_8fe3c5fd8cdda02855e5f9b5a1ea85a4 -------------e- /var/tmp/sess_941376d5cb51e0ba73f9a27ee259c159 -------------e- /var/tmp/sess_4fa17b1eac1d18341d20d0d8d4991ceb -------------e- /var/tmp/cache_de647c956ca6a1b75744ad194aceaa82 -------------e- /var/tmp/mm.sem.Ugu7Be -------------e- /var/tmp/sess_656e8a50759d5b36b963e7eb85e0bb0d -------------e- /var/tmp/sess_983f77b607bbffa1748d6c49557381e9 -------------e- /var/tmp/sess_632860d092e5e374da522ed2f88e83ce -------------e- /var/tmp/sess_030f900b81cc2a4ad095d53ef3ee0791 -------------e- /var/tmp/yum.log -------------e- /var/tmp/cache_810174993c6a2c0efe2edbe4c39a4a81 -------------e- /var/tmp/sess_29e2c781643434e81d189fc41f47fd34 -------------e- /var/tmp/tmpE12ahd -------------e- /var/tmp/sess_935da512fb077e04610266748b3b77f3 - cat /etc/fstab /tmp as: loop,rw,noexec,nosuid,nodev

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File system loop detected in /var/named/chroot/var/named/ CentOS6.3

- by wilco

When I use find command on shell, I got the following error. find: File system loop detected; /var/named/chroot/var/named' is part of the same file system loop as/var/named'. I verified the inode number and it comes out the same as below. [root@serverone ~]# ls -ldi /var/named/chroot/var/named/ /var/named 6684673 drwxr-x--- 6 root named 4096 Sep 7 17:17 /var/named 6684673 drwxr-x--- 6 root named 4096 Sep 7 17:17 /var/named/chroot/var/named/ I cannot remove the directory with rm -f and it is saying this is directory. It is minimal CentOS6.3 install with plesk 11. Any help would be appreciated.

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problem with sIFR 3 not displaying in IE just getting XXX

- by user288306

I am having a problem with sIFR 3 not displaying in IE. I get 3 larges black XXX in IE yet it displays fine in Firefox. I have checked i do have the most recent version of flash installed correctly. Here is the code on the page <div id="features"> <div id="mainmessage_advertisers"><h2>Advertisers</h2><br /><br /><h3><a href="">Reach your customers where they browse. Buy directly from top web publishers.</a></h3><br /><br /><br /><a href=""><img src="img/buyads.gif" border="0"></a></div> <div id="mainmessage_publishers"><h2>Publishers</h2><br /><br /><h3>Take control of your ad space and start generating more revenue than <u>ever before</u>.</h3><br /><br /><br /><a href=""><img src="img/sellads.gif" border="0"></a></div> </div>` Here is the code from my global.css #mainmessage_advertisers { width: 395px; height: 200px; padding: 90px 50px; border: 1px; float: left; } #mainmessage_publishers { width: 395px; height: 200px; padding: 90px 50px; float: right; } and here is what i have in my sifr.js /*********************************************************************** SIFR 3.0 (BETA 1) FUNCTIONS ************************************************************************/ var parseSelector=(function(){var _1=/\s*,\s*/;var _2=/\s*([\s>+~(),]|^|$)\s*/g;var _3=/([\s>+~,]|[^(]\+|^)([#.:@])/g;var _4=/^[^\s>+~]/;var _5=/[\s#.:>+~()@]|[^\s#.:>+~()@]+/g;function parseSelector(_6,_7){_7=_7||document.documentElement;var _8=_6.split(_1),_9=[];for(var i=0;i<_8.length;i++){var _b=[_7],_c=toStream(_8[i]);for(var j=0;j<_c.length;){var _e=_c[j++],_f=_c[j++],_10="";if(_c[j]=="("){while(_c[j++]!=")"&&j<_c.length){_10+=_c[j]}_10=_10.slice(0,-1)}_b=select(_b,_e,_f,_10)}_9=_9.concat(_b)}return _9}function toStream(_11){var _12=_11.replace(_2,"$1").replace(_3,"$1*$2");if(_4.test(_12)){_12=" "+_12}return _12.match(_5)||[]}function select(_13,_14,_15,_16){return (_17[_14])?_17[_14](_13,_15,_16):[]}var _18={toArray:function(_19){var a=[];for(var i=0;i<_19.length;i++){a.push(_19[i])}return a}};var dom={isTag:function(_1d,tag){return (tag=="*")||(tag.toLowerCase()==_1d.nodeName.toLowerCase())},previousSiblingElement:function(_1f){do{_1f=_1f.previousSibling}while(_1f&&_1f.nodeType!=1);return _1f},nextSiblingElement:function(_20){do{_20=_20.nextSibling}while(_20&&_20.nodeType!=1);return _20},hasClass:function(_21,_22){return (_22.className||"").match("(^|\\s)"+_21+"(\\s|$)")},getByTag:function(tag,_24){return _24.getElementsByTagName(tag)}};var _17={"#":function(_25,_26){for(var i=0;i<_25.length;i++){if(_25[i].getAttribute("id")==_26){return [_25[i]]}}return []}," ":function(_28,_29){var _2a=[];for(var i=0;i<_28.length;i++){_2a=_2a.concat(_18.toArray(dom.getByTag(_29,_28[i])))}return _2a},">":function(_2c,_2d){var _2e=[];for(var i=0,_30;i<_2c.length;i++){_30=_2c[i];for(var j=0,_32;j<_30.childNodes.length;j++){_32=_30.childNodes[j];if(_32.nodeType==1&&dom.isTag(_32,_2d)){_2e.push(_32)}}}return _2e},".":function(_33,_34){var _35=[];for(var i=0,_37;i<_33.length;i++){_37=_33[i];if(dom.hasClass([_34],_37)){_35.push(_37)}}return _35},":":function(_38,_39,_3a){return (pseudoClasses[_39])?pseudoClasses[_39](_38,_3a):[]}};parseSelector.selectors=_17;parseSelector.pseudoClasses={};parseSelector.util=_18;parseSelector.dom=dom;return parseSelector})(); var sIFR=new function(){var _3b=this;var _3c="sIFR-active";var _3d="sIFR-replaced";var _3e="sIFR-flash";var _3f="sIFR-ignore";var _40="sIFR-alternate";var _41="sIFR-class";var _42="sIFR-layout";var _43="http://www.w3.org/1999/xhtml";var _44=6;var _45=126;var _46=8;var _47="SIFR-PREFETCHED";var _48=" ";this.isActive=false;this.isEnabled=true;this.hideElements=true;this.replaceNonDisplayed=false;this.preserveSingleWhitespace=false;this.fixWrap=true;this.registerEvents=true;this.setPrefetchCookie=true;this.cookiePath="/";this.domains=[];this.fromLocal=true;this.forceClear=false;this.forceWidth=true;this.fitExactly=false;this.forceTextTransform=true;this.useDomContentLoaded=true;this.debugMode=false;this.hasFlashClassSet=false;var _49=0;var _4a=false,_4b=false;var dom=new function(){this.getBody=function(){var _4d=document.getElementsByTagName("body");if(_4d.length==1){return _4d[0]}return null};this.addClass=function(_4e,_4f){if(_4f){_4f.className=((_4f.className||"")==""?"":_4f.className+" ")+_4e}};this.removeClass=function(_50,_51){if(_51){_51.className=_51.className.replace(new RegExp("(^|\\s)"+_50+"(\\s|$)"),"").replace(/^\s+|(\s)\s+/g,"$1")}};this.hasClass=function(_52,_53){return new RegExp("(^|\\s)"+_52+"(\\s|$)").test(_53.className)};this.create=function(_54){if(document.createElementNS){return document.createElementNS(_43,_54)}return document.createElement(_54)};this.setInnerHtml=function(_55,_56){if(ua.innerHtmlSupport){_55.innerHTML=_56}else{if(ua.xhtmlSupport){_56=["<root xmlns=\"",_43,"\">",_56,"</root>"].join("");var xml=(new DOMParser()).parseFromString(_56,"text/xml");xml=document.importNode(xml.documentElement,true);while(_55.firstChild){_55.removeChild(_55.firstChild)}while(xml.firstChild){_55.appendChild(xml.firstChild)}}}};this.getComputedStyle=function(_58,_59){var _5a;if(document.defaultView&&document.defaultView.getComputedStyle){_5a=document.defaultView.getComputedStyle(_58,null)[_59]}else{if(_58.currentStyle){_5a=_58.currentStyle[_59]}}return _5a||""};this.getStyleAsInt=function(_5b,_5c,_5d){var _5e=this.getComputedStyle(_5b,_5c);if(_5d&&!/px$/.test(_5e)){return 0}_5e=parseInt(_5e);return isNaN(_5e)?0:_5e};this.getZoom=function(){return _5f.zoom.getLatest()}};this.dom=dom;var ua=new function(){var ua=navigator.userAgent.toLowerCase();var _62=(navigator.product||"").toLowerCase();this.macintosh=ua.indexOf("mac")>-1;this.windows=ua.indexOf("windows")>-1;this.quicktime=false;this.opera=ua.indexOf("opera")>-1;this.konqueror=_62.indexOf("konqueror")>-1;this.ie=false/*@cc_on || true @*/;this.ieSupported=this.ie&&!/ppc|smartphone|iemobile|msie\s5\.5/.test(ua)/*@cc_on && @_jscript_version >= 5.5 @*/;this.ieWin=this.ie&&this.windows/*@cc_on && @_jscript_version >= 5.1 @*/;this.windows=this.windows&&(!this.ie||this.ieWin);this.ieMac=this.ie&&this.macintosh/*@cc_on && @_jscript_version < 5.1 @*/;this.macintosh=this.macintosh&&(!this.ie||this.ieMac);this.safari=ua.indexOf("safari")>-1;this.webkit=ua.indexOf("applewebkit")>-1&&!this.konqueror;this.khtml=this.webkit||this.konqueror;this.gecko=!this.webkit&&_62=="gecko";this.operaVersion=this.opera&&/.*opera(\s|\/)(\d+\.\d+)/.exec(ua)?parseInt(RegExp.$2):0;this.webkitVersion=this.webkit&&/.*applewebkit\/(\d+).*/.exec(ua)?parseInt(RegExp.$1):0;this.geckoBuildDate=this.gecko&&/.*gecko\/(\d{8}).*/.exec(ua)?parseInt(RegExp.$1):0;this.konquerorVersion=this.konqueror&&/.*konqueror\/(\d\.\d).*/.exec(ua)?parseInt(RegExp.$1):0;this.flashVersion=0;if(this.ieWin){var axo;var _64=false;try{axo=new ActiveXObject("ShockwaveFlash.ShockwaveFlash.7")}catch(e){try{axo=new ActiveXObject("ShockwaveFlash.ShockwaveFlash.6");this.flashVersion=6;axo.AllowScriptAccess="always"}catch(e){_64=this.flashVersion==6}if(!_64){try{axo=new ActiveXObject("ShockwaveFlash.ShockwaveFlash")}catch(e){}}}if(!_64&&axo){this.flashVersion=parseFloat(/([\d,?]+)/.exec(axo.GetVariable("$version"))[1].replace(/,/g,"."))}}else{if(navigator.plugins&&navigator.plugins["Shockwave Flash"]){var _65=navigator.plugins["Shockwave Flash"];this.flashVersion=parseFloat(/(\d+\.?\d*)/.exec(_65.description)[1]);var i=0;while(this.flashVersion>=_46&&i<navigator.mimeTypes.length){var _67=navigator.mimeTypes[i];if(_67.type=="application/x-shockwave-flash"&&_67.enabledPlugin.description.toLowerCase().indexOf("quicktime")>-1){this.flashVersion=0;this.quicktime=true}i++}}}this.flash=this.flashVersion>=_46;this.transparencySupport=this.macintosh||this.windows;this.computedStyleSupport=this.ie||document.defaultView&&document.defaultView.getComputedStyle&&(!this.gecko||this.geckoBuildDate>=20030624);this.css=true;if(this.computedStyleSupport){try{var _68=document.getElementsByTagName("head")[0];_68.style.backgroundColor="#FF0000";var _69=dom.getComputedStyle(_68,"backgroundColor");this.css=!_69||/\#F{2}0{4}|rgb$255,\s?0,\s?0$/i.test(_69);_68=null}catch(e){}}this.xhtmlSupport=!!window.DOMParser&&!!document.importNode;this.innerHtmlSupport;try{var n=dom.create("span");if(!this.ieMac){n.innerHTML="x"}this.innerHtmlSupport=n.innerHTML=="x"}catch(e){this.innerHtmlSupport=false}this.zoomSupport=!!(this.opera&&document.documentElement);this.geckoXml=this.gecko&&(document.contentType||"").indexOf("xml")>-1;this.requiresPrefetch=this.ieWin||this.khtml;this.verifiedKonqueror=false;this.supported=this.flash&&this.css&&(!this.ie||this.ieSupported)&&(!this.opera||this.operaVersion>=8)&&(!this.webkit||this.webkitVersion>=412)&&(!this.konqueror||this.konquerorVersion>3.5)&&this.computedStyleSupport&&(this.innerHtmlSupport||!this.khtml&&this.xhtmlSupport)};this.ua=ua;var _6b=new function(){function capitalize($){return $.toUpperCase()}this.normalize=function(str){if(_3b.preserveSingleWhitespace){return 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How can I back up my ubuntu system?

- by Eloff

I'm sure there's a lot of questions on here similar to this, and I've been reading them, but I still feel this warrants a new question. I want nightly, incremental backups (full disk images would waste a lot of space - unless compressed somehow.) Preferably rotating or deleting old backups when running out of space or after a fixed number of backups. I want to be able to quickly and painlessly restore my system from these backups. This is my first time running ubuntu as my main development machine and I know from my experience with it as a server and in virtual machines that I regularly manage to make it unbootable or damage it to the point of being unable to rescue it. So how would you recommend I do this? There are so many options out there I really don't know where to start. There seems to be a vocal school of thought that it's sufficient to backup your home directory and the list of installed packages from the package manager. I've already installed lots of things from source, or outside of the package manager (development tools, ides, compilers, graphics drivers, etc.) So at the very least, if I do not back up the operating system itself I need to grab all config files, all program binaries, all created but required files, etc. I'd rather backup too much than too little - an ubuntu install is tiny anyway. Also this drastically reduces the restore time, which would cost me more in my time than the extra storage space. I tried using Deja Dup to backup the root partition, excluding some things like /mnt /media /dev /proc etc. Although many websites assured me you can backup a running linux system this way - that seems to be false as it complained that it could not backup the following files: /boot/System.map-3.0.0-17-generic /boot/System.map-3.2.0-22-generic /boot/vmcoreinfo-3.0.0-17-generic /boot/vmlinuz-3.0.0-17-generic /boot/vmlinuz-3.2.0-22-generic /etc/.pwd.lock /etc/NetworkManager/system-connections/LAN Connection /etc/apparmor.d/cache/lightdm-guest-session /etc/apparmor.d/cache/sbin.dhclient /etc/apparmor.d/cache/usr.bin.evince /etc/apparmor.d/cache/usr.lib.telepathy /etc/apparmor.d/cache/usr.sbin.cupsd /etc/apparmor.d/cache/usr.sbin.tcpdump /etc/apt/trustdb.gpg /etc/at.deny /etc/ati/inst_path_default /etc/ati/inst_path_override /etc/chatscripts /etc/cups/ssl /etc/cups/subscriptions.conf /etc/cups/subscriptions.conf.O /etc/default/cacerts /etc/fuse.conf /etc/group- /etc/gshadow /etc/gshadow- /etc/mtab.fuselock /etc/passwd- /etc/ppp/chap-secrets /etc/ppp/pap-secrets /etc/ppp/peers /etc/security/opasswd /etc/shadow /etc/shadow- /etc/ssl/private /etc/sudoers /etc/sudoers.d/README /etc/ufw/after.rules /etc/ufw/after6.rules /etc/ufw/before.rules /etc/ufw/before6.rules /lib/ufw/user.rules /lib/ufw/user6.rules /lost+found /root /run/crond.reboot /run/cups/certs /run/lightdm /run/lock/whoopsie/lock /run/udisks /var/backups/group.bak /var/backups/gshadow.bak /var/backups/passwd.bak /var/backups/shadow.bak /var/cache/apt/archives/lock /var/cache/cups/job.cache /var/cache/cups/job.cache.O /var/cache/cups/ppds.dat /var/cache/debconf/passwords.dat /var/cache/ldconfig /var/cache/lightdm/dmrc /var/crash/_usr_lib_x86_64-linux-gnu_colord_colord.102.crash /var/lib/apt/lists/lock /var/lib/dpkg/lock /var/lib/dpkg/triggers/Lock /var/lib/lightdm /var/lib/mlocate/mlocate.db /var/lib/polkit-1 /var/lib/sudo /var/lib/urandom/random-seed /var/lib/ureadahead/pack /var/lib/ureadahead/run.pack /var/log/btmp /var/log/installer/casper.log /var/log/installer/debug /var/log/installer/partman /var/log/installer/syslog /var/log/installer/version /var/log/lightdm/lightdm.log /var/log/lightdm/x-0-greeter.log /var/log/lightdm/x-0.log /var/log/speech-dispatcher /var/log/upstart/alsa-restore.log /var/log/upstart/alsa-restore.log.1.gz /var/log/upstart/console-setup.log /var/log/upstart/console-setup.log.1.gz /var/log/upstart/container-detect.log /var/log/upstart/container-detect.log.1.gz /var/log/upstart/hybrid-gfx.log /var/log/upstart/hybrid-gfx.log.1.gz /var/log/upstart/modemmanager.log /var/log/upstart/modemmanager.log.1.gz /var/log/upstart/module-init-tools.log /var/log/upstart/module-init-tools.log.1.gz /var/log/upstart/procps-static-network-up.log /var/log/upstart/procps-static-network-up.log.1.gz /var/log/upstart/procps-virtual-filesystems.log /var/log/upstart/procps-virtual-filesystems.log.1.gz /var/log/upstart/rsyslog.log /var/log/upstart/rsyslog.log.1.gz /var/log/upstart/ureadahead.log /var/log/upstart/ureadahead.log.1.gz /var/spool/anacron/cron.daily /var/spool/anacron/cron.monthly /var/spool/anacron/cron.weekly /var/spool/cron/atjobs /var/spool/cron/atspool /var/spool/cron/crontabs /var/spool/cups

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Created .htaccess file in /var/www to redirect to folder /var/www/foo

- by Serg

Context: How can I configure a NameCheap domain to point to an Apache subfolder? Following Devin's answer here I've created a .htaccess file in /var/www and wrote in the following: RewriteEngine On RewriteCond !sergiotapia.me RewriteRule (.*) sergiotapia.me/$1 [QSA] My folder structure is such: /var/www/ /var/www/sergiotapia.me When visiting the URL sergiotapia.me I see the contents of /var/www when I would like to be directly redirected to /var/www/sergiotapia.me Any ideas?

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Modify the filter chain - Or select servlet to respond to request using filter

- by klonq

I am trying to use a filter to map requests. I am trying to do this for two reasons, firstly to dynamically generate URI's and have them mapped to the appropriate servlet and secondly to catch URI's which are not registered and handle them appropriately. So I'm using a catch-all filter to process the URI and determine the response. I would like some way of modifying the filter chain, or some way to set the servlet which responds to the request from within the filter. I have been unsuccessful using filterConfig.getServletContext().getRequestDispatcher().forward() to send to jsp, ideally though I would like to map to a servlet but can't figure out how. The reason I am not doing this from within a servlet is that I have some URIs which are fixed within web.xml and if I use a catch-all servlet those URIs do not get mapped. Is this possible, is it clean or it going to get really messy?

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I have a filter for jquery masonry - but I want to filter moomasonry

- by Jason

Hi, I'm using jquery masonry for layout. But I am considering moving to mootools. I have found a masonry port to mootools, called moomasonry - http://www.crionics.com/products/opensource/mooMasonry/Demos/basic.html With help here, I have a filter on the masonry divs by class: $('a.filter').click(function(){ filterBoxes(this.id); }) function filterBoxes(klass){ if (klass == "all") { klass = "box" } $('#holder').find('.' + klass) .hide() .appendTo('#main') .fadeIn('200') $('#main').find('.box:not(.' + klass + ')') .fadeOut( '200', function(){ $(this).appendTo('#holder') ; }); setTimeout(function(){ $('#main').masonry() },500); } But, how would I filter divs by class in mootools? and have it reload masonry after each filter. See my site for example: http://jasondaydesign.com/masonry_demo/

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Use of var keyword in C#

- by kronoz

After discussion with colleagues regarding the use of the 'var' keyword in C# 3 I wondered what people's opinions were on the appropriate uses of type inference via var? For example I rather lazily used var in questionable circumstances, e.g.:- foreach(var item in someList) { // ... } // Type of 'item' not clear. var something = someObject.SomeProperty; // Type of 'something' not clear. var something = someMethod(); // Type of 'something' not clear. More legitimate uses of var are as follows:- var l = new List<string>(); // Obvious what l will be. var s = new SomeClass(); // Obvious what s will be. Interestingly LINQ seems to be a bit of a grey area, e.g.:- var results = from r in dataContext.SomeTable select r; // Not *entirely clear* what results will be here. It's clear what results will be in that it will be a type which implements IEnumerable, however it isn't entirely obvious in the same way a var declaring a new object is. It's even worse when it comes to LINQ to objects, e.g.:- var results = from item in someList where item != 3 select item; This is no better than the equivilent foreach(var item in someList) { // ... } equivilent. There is a real concern about type safety here - for example if we were to place the results of that query into an overloaded method that accepted IEnumerable<int> and IEnumerable<double> the caller might inadvertently pass in the wrong type. Edit - var does maintain strong typing but the question is really whether it's dangerous for the type to not be immediately apparent on definition, something which is magnified when overloads mean compiler errors might not be issued when you unintentionally pass the wrong type to a method. Related Question: http://stackoverflow.com/questions/633474/c-do-you-use-var

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How to filter the jqGrid data NOT using the built in search/filter box

- by Jimbo

I want users to be able to filter grid data without using the intrinsic search box. I have created two input fields for date (from and to) and now need to tell the grid to adopt this as its filter and then to request new data. Forging a server request for grid data (bypassing the grid) and setting the grid's data to be the response data wont work - because as soon as the user tries to re-order the results or change the page etc. the grid will request new data from the server using a blank filter. I cant seem to find grid API to achieve this - does anyone have any ideas? Thanks.

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File system loop detected in /var/named/chroot/var/named/

- by Iko

The problem start with a message No space left on device. After investigating a little (with google's help) I found : find: File system loop detected; /var/named/chroot/var/named' is part of the same file system loop as/var/named'. What I don't know is what to do next. I found this on centos.org : and see if the inode numbers are the same (they shouldn't be). If they are then you need to remove the /var/named/chroot/var/named/ hard link and recreate it as a directory the inode number are the same but I don't know exactly which folder to delete and what to do next thank you for any help Linux xxxxx.onlinehome-server.info 2.6.32-220.13.1.el6.x86_64 #1 SMP Tue Apr 17 23:56:34 BST 2012 x86_64 x86_64 x86_64 GNU/Linux

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Resize the /var directory in redhat enterprise edition 4

- by Sri

I am running NDB mysql. the log files fills up the /var directory. therefore i cant start the ndbd service now. as a temporary fix, i have deleted the log files and again working fine. but again the log files fill up the /var directory. i got plenty of space in other partition. therefore i would like to swap the partition from one directory to /var. here if my input from df -h Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00 ext3 54G 2.9G 49G 6% / /dev/cciss/c0d0p1 ext3 99M 14M 81M 14% /boot none tmpfs 1013M 0 1013M 0% /dev/shm /dev/cciss/c0d0p2 ext3 9.7G 9.7G 0 100% /var there are plenty of space in /dev/mapper/VolGroup00-LogVol00. Therefore i will like to swap 10 G space from this directory to /var. could you please help me out to solve this problem?

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Exclude filter from certain url's

- by Mads Mobæk

I'm using a filter in web.xml to check if a user is logged in or not: <filter> <filter-name>LoginFilter</filter-name> <filter-class>com.mycompany.LoginFilter</filter-class> </filter> <filter-mapping> <filter-name>LoginFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> And this works like a charm until I have a stylesheet or image I want to exclude from this filter. I know one approach is to put everything that's protected inside /privateor similar, and then set the url-pattern to: <url-pattern>/private/*</url-pattern>. The downside to this is my URLs now looking like: http://www.mycompany.com/private/mypage instead of http://www.mycompany.com/mypage. Is there another solution to this problem, that let me keep my pretty-urls?

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Upload File to Windows Azure Blob in Chunks through ASP.NET MVC, JavaScript and HTML5

- by Shaun

Originally posted on: http://geekswithblogs.net/shaunxu/archive/2013/07/01/upload-file-to-windows-azure-blob-in-chunks-through-asp.net.aspxMany people are using Windows Azure Blob Storage to store their data in the cloud. Blob storage provides 99.9% availability with easy-to-use API through .NET SDK and HTTP REST. For example, we can store JavaScript files, images, documents in blob storage when we are building an ASP.NET web application on a Web Role in Windows Azure. Or we can store our VHD files in blob and mount it as a hard drive in our cloud service. If you are familiar with Windows Azure, you should know that there are two kinds of blob: page blob and block blob. The page blob is optimized for random read and write, which is very useful when you need to store VHD files. The block blob is optimized for sequential/chunk read and write, which has more common usage. Since we can upload block blob in blocks through BlockBlob.PutBlock, and them commit them as a whole blob with invoking the BlockBlob.PutBlockList, it is very powerful to upload large files, as we can upload blocks in parallel, and provide pause-resume feature. There are many documents, articles and blog posts described on how to upload a block blob. Most of them are focus on the server side, which means when you had received a big file, stream or binaries, how to upload them into blob storage in blocks through .NET SDK. But the problem is, how can we upload these large files from client side, for example, a browser. This questioned to me when I was working with a Chinese customer to help them build a network disk production on top of azure. The end users upload their files from the web portal, and then the files will be stored in blob storage from the Web Role. My goal is to find the best way to transform the file from client (end user’s machine) to the server (Web Role) through browser. In this post I will demonstrate and describe what I had done, to upload large file in chunks with high speed, and save them as blocks into Windows Azure Blob Storage. Traditional Upload, Works with Limitation The simplest way to implement this requirement is to create a web page with a form that contains a file input element and a submit button. 1: @using (Html.BeginForm("About", "Index", FormMethod.Post, new { enctype = "multipart/form-data" })) 2: { 3: <input type="file" name="file" /> 4: <input type="submit" value="upload" /> 5: } And then in the backend controller, we retrieve the whole content of this file and upload it in to the blob storage through .NET SDK. We can split the file in blocks and upload them in parallel and commit. The code had been well blogged in the community. 1: [HttpPost] 2: public ActionResult About(HttpPostedFileBase file) 3: { 4: var container = _client.GetContainerReference("test"); 5: container.CreateIfNotExists(); 6: var blob = container.GetBlockBlobReference(file.FileName); 7: var blockDataList = new Dictionary<string, byte[]>(); 8: using (var stream = file.InputStream) 9: { 10: var blockSizeInKB = 1024; 11: var offset = 0; 12: var index = 0; 13: while (offset < stream.Length) 14: { 15: var readLength = Math.Min(1024 * blockSizeInKB, (int)stream.Length - offset); 16: var blockData = new byte[readLength]; 17: offset += stream.Read(blockData, 0, readLength); 18: blockDataList.Add(Convert.ToBase64String(BitConverter.GetBytes(index)), blockData); 19: 20: index++; 21: } 22: } 23: 24: Parallel.ForEach(blockDataList, (bi) => 25: { 26: blob.PutBlock(bi.Key, new MemoryStream(bi.Value), null); 27: }); 28: blob.PutBlockList(blockDataList.Select(b => b.Key).ToArray()); 29: 30: return RedirectToAction("About"); 31: } This works perfect if we selected an image, a music or a small video to upload. But if I selected a large file, let’s say a 6GB HD-movie, after upload for about few minutes the page will be shown as below and the upload will be terminated. In ASP.NET there is a limitation of request length and the maximized request length is defined in the web.config file. It’s a number which less than about 4GB. So if we want to upload a really big file, we cannot simply implement in this way. Also, in Windows Azure, a cloud service network load balancer will terminate the connection if exceed the timeout period. From my test the timeout looks like 2 - 3 minutes. Hence, when we need to upload a large file we cannot just use the basic HTML elements. Besides the limitation mentioned above, the simple HTML file upload cannot provide rich upload experience such as chunk upload, pause and pause-resume. So we need to find a better way to upload large file from the client to the server. Upload in Chunks through HTML5 and JavaScript In order to break those limitation mentioned above we will try to upload the large file in chunks. This takes some benefit to us such as - No request size limitation: Since we upload in chunks, we can define the request size for each chunks regardless how big the entire file is. - No timeout problem: The size of chunks are controlled by us, which means we should be able to make sure request for each chunk upload will not exceed the timeout period of both ASP.NET and Windows Azure load balancer. It was a big challenge to upload big file in chunks until we have HTML5. There are some new features and improvements introduced in HTML5 and we will use them to implement our solution. In HTML5, the File interface had been improved with a new method called “slice”. It can be used to read part of the file by specifying the start byte index and the end byte index. For example if the entire file was 1024 bytes, file.slice(512, 768) will read the part of this file from the 512nd byte to 768th byte, and return a new object of interface called "Blob”, which you can treat as an array of bytes. In fact, a Blob object represents a file-like object of immutable, raw data. The File interface is based on Blob, inheriting blob functionality and expanding it to support files on the user's system. For more information about the Blob please refer here. File and Blob is very useful to implement the chunk upload. We will use File interface to represent the file the user selected from the browser and then use File.slice to read the file in chunks in the size we wanted. For example, if we wanted to upload a 10MB file with 512KB chunks, then we can read it in 512KB blobs by using File.slice in a loop. Assuming we have a web page as below. User can select a file, an input box to specify the block size in KB and a button to start upload. 1: <div> 2: <input type="file" id="upload_files" name="files[]" /><br /> 3: Block Size: <input type="number" id="block_size" value="512" name="block_size" />KB<br /> 4: <input type="button" id="upload_button_blob" name="upload" value="upload (blob)" /> 5: </div> Then we can have the JavaScript function to upload the file in chunks when user clicked the button. 1: <script type="text/javascript"> 1: 2: $(function () { 3: $("#upload_button_blob").click(function () { 4: }); 5: });</script> Firstly we need to ensure the client browser supports the interfaces we are going to use. Just try to invoke the File, Blob and FormData from the “window” object. If any of them is “undefined” the condition result will be “false” which means your browser doesn’t support these premium feature and it’s time for you to get your browser updated. FormData is another new feature we are going to use in the future. It could generate a temporary form for us. We will use this interface to create a form with chunk and associated metadata when invoked the service through ajax. 1: $("#upload_button_blob").click(function () { 2: // assert the browser support html5 3: if (window.File && window.Blob && window.FormData) { 4: alert("Your brwoser is awesome, let's rock!"); 5: } 6: else { 7: alert("Oh man plz update to a modern browser before try is cool stuff out."); 8: return; 9: } 10: }); Each browser supports these interfaces by their own implementation and currently the Blob, File and File.slice are supported by Chrome 21, FireFox 13, IE 10, Opera 12 and Safari 5.1 or higher. After that we worked on the files the user selected one by one since in HTML5, user can select multiple files in one file input box. 1: var files = $("#upload_files")[0].files; 2: for (var i = 0; i < files.length; i++) { 3: var file = files[i]; 4: var fileSize = file.size; 5: var fileName = file.name; 6: } Next, we calculated the start index and end index for each chunks based on the size the user specified from the browser. We put them into an array with the file name and the index, which will be used when we upload chunks into Windows Azure Blob Storage as blocks since we need to specify the target blob name and the block index. At the same time we will store the list of all indexes into another variant which will be used to commit blocks into blob in Azure Storage once all chunks had been uploaded successfully. 1: $("#upload_button_blob").click(function () { 2: // assert the browser support html5 3: ... ... 4: // start to upload each files in chunks 5: var files = $("#upload_files")[0].files; 6: for (var i = 0; i < files.length; i++) { 7: var file = files[i]; 8: var fileSize = file.size; 9: var fileName = file.name; 10: 11: // calculate the start and end byte index for each blocks(chunks) 12: // with the index, file name and index list for future using 13: var blockSizeInKB = $("#block_size").val(); 14: var blockSize = blockSizeInKB * 1024; 15: var blocks = []; 16: var offset = 0; 17: var index = 0; 18: var list = ""; 19: while (offset < fileSize) { 20: var start = offset; 21: var end = Math.min(offset + blockSize, fileSize); 22: 23: blocks.push({ 24: name: fileName, 25: index: index, 26: start: start, 27: end: end 28: }); 29: list += index + ","; 30: 31: offset = end; 32: index++; 33: } 34: } 35: }); Now we have all chunks’ information ready. The next step should be upload them one by one to the server side, and at the server side when received a chunk it will upload as a block into Blob Storage, and finally commit them with the index list through BlockBlobClient.PutBlockList. But since all these invokes are ajax calling, which means not synchronized call. So we need to introduce a new JavaScript library to help us coordinate the asynchronize operation, which named “async.js”. You can download this JavaScript library here, and you can find the document here. I will not explain this library too much in this post. We will put all procedures we want to execute as a function array, and pass into the proper function defined in async.js to let it help us to control the execution sequence, in series or in parallel. Hence we will define an array and put the function for chunk upload into this array. 1: $("#upload_button_blob").click(function () { 2: // assert the browser support html5 3: ... ... 4: 5: // start to upload each files in chunks 6: var files = $("#upload_files")[0].files; 7: for (var i = 0; i < files.length; i++) { 8: var file = files[i]; 9: var fileSize = file.size; 10: var fileName = file.name; 11: // calculate the start and end byte index for each blocks(chunks) 12: // with the index, file name and index list for future using 13: ... ... 14: 15: // define the function array and push all chunk upload operation into this array 16: blocks.forEach(function (block) { 17: putBlocks.push(function (callback) { 18: }); 19: }); 20: } 21: }); 22: }); As you can see, I used File.slice method to read each chunks based on the start and end byte index we calculated previously, and constructed a temporary HTML form with the file name, chunk index and chunk data through another new feature in HTML5 named FormData. Then post this form to the backend server through jQuery.ajax. This is the key part of our solution. 1: $("#upload_button_blob").click(function () { 2: // assert the browser support html5 3: ... ... 4: // start to upload each files in chunks 5: var files = $("#upload_files")[0].files; 6: for (var i = 0; i < files.length; i++) { 7: var file = files[i]; 8: var fileSize = file.size; 9: var fileName = file.name; 10: // calculate the start and end byte index for each blocks(chunks) 11: // with the index, file name and index list for future using 12: ... ... 13: // define the function array and push all chunk upload operation into this array 14: blocks.forEach(function (block) { 15: putBlocks.push(function (callback) { 16: // load blob based on the start and end index for each chunks 17: var blob = file.slice(block.start, block.end); 18: // put the file name, index and blob into a temporary from 19: var fd = new FormData(); 20: fd.append("name", block.name); 21: fd.append("index", block.index); 22: fd.append("file", blob); 23: // post the form to backend service (asp.net mvc controller action) 24: $.ajax({ 25: url: "/Home/UploadInFormData", 26: data: fd, 27: processData: false, 28: contentType: "multipart/form-data", 29: type: "POST", 30: success: function (result) { 31: if (!result.success) { 32: alert(result.error); 33: } 34: callback(null, block.index); 35: } 36: }); 37: }); 38: }); 39: } 40: }); Then we will invoke these functions one by one by using the async.js. And once all functions had been executed successfully I invoked another ajax call to the backend service to commit all these chunks (blocks) as the blob in Windows Azure Storage. 1: $("#upload_button_blob").click(function () { 2: // assert the browser support html5 3: ... ... 4: // start to upload each files in chunks 5: var files = $("#upload_files")[0].files; 6: for (var i = 0; i < files.length; i++) { 7: var file = files[i]; 8: var fileSize = file.size; 9: var fileName = file.name; 10: // calculate the start and end byte index for each blocks(chunks) 11: // with the index, file name and index list for future using 12: ... ... 13: // define the function array and push all chunk upload operation into this array 14: ... ... 15: // invoke the functions one by one 16: // then invoke the commit ajax call to put blocks into blob in azure storage 17: async.series(putBlocks, function (error, result) { 18: var data = { 19: name: fileName, 20: list: list 21: }; 22: $.post("/Home/Commit", data, function (result) { 23: if (!result.success) { 24: alert(result.error); 25: } 26: else { 27: alert("done!"); 28: } 29: }); 30: }); 31: } 32: }); That’s all in the client side. The outline of our logic would be - Calculate the start and end byte index for each chunks based on the block size. - Defined the functions of reading the chunk form file and upload the content to the backend service through ajax. - Execute the functions defined in previous step with “async.js”. - Commit the chunks by invoking the backend service in Windows Azure Storage finally. Save Chunks as Blocks into Blob Storage In above we finished the client size JavaScript code. It uploaded the file in chunks to the backend service which we are going to implement in this step. We will use ASP.NET MVC as our backend service, and it will receive the chunks, upload into Windows Azure Bob Storage in blocks, then finally commit as one blob. As in the client side we uploaded chunks by invoking the ajax call to the URL "/Home/UploadInFormData", I created a new action under the Index controller and it only accepts HTTP POST request. 1: [HttpPost] 2: public JsonResult UploadInFormData() 3: { 4: var error = string.Empty; 5: try 6: { 7: } 8: catch (Exception e) 9: { 10: error = e.ToString(); 11: } 12: 13: return new JsonResult() 14: { 15: Data = new 16: { 17: success = string.IsNullOrWhiteSpace(error), 18: error = error 19: } 20: }; 21: } Then I retrieved the file name, index and the chunk content from the Request.Form object, which was passed from our client side. And then, used the Windows Azure SDK to create a blob container (in this case we will use the container named “test”.) and create a blob reference with the blob name (same as the file name). Then uploaded the chunk as a block of this blob with the index, since in Blob Storage each block must have an index (ID) associated with so that finally we can put all blocks as one blob by specifying their block ID list. 1: [HttpPost] 2: public JsonResult UploadInFormData() 3: { 4: var error = string.Empty; 5: try 6: { 7: var name = Request.Form["name"]; 8: var index = int.Parse(Request.Form["index"]); 9: var file = Request.Files[0]; 10: var id = Convert.ToBase64String(BitConverter.GetBytes(index)); 11: 12: var container = _client.GetContainerReference("test"); 13: container.CreateIfNotExists(); 14: var blob = container.GetBlockBlobReference(name); 15: blob.PutBlock(id, file.InputStream, null); 16: } 17: catch (Exception e) 18: { 19: error = e.ToString(); 20: } 21: 22: return new JsonResult() 23: { 24: Data = new 25: { 26: success = string.IsNullOrWhiteSpace(error), 27: error = error 28: } 29: }; 30: } Next, I created another action to commit the blocks into blob once all chunks had been uploaded. Similarly, I retrieved the blob name from the Request.Form. I also retrieved the chunks ID list, which is the block ID list from the Request.Form in a string format, split them as a list, then invoked the BlockBlob.PutBlockList method. After that our blob will be shown in the container and ready to be download. 1: [HttpPost] 2: public JsonResult Commit() 3: { 4: var error = string.Empty; 5: try 6: { 7: var name = Request.Form["name"]; 8: var list = Request.Form["list"]; 9: var ids = list 10: .Split(',') 11: .Where(id => !string.IsNullOrWhiteSpace(id)) 12: .Select(id => Convert.ToBase64String(BitConverter.GetBytes(int.Parse(id)))) 13: .ToArray(); 14: 15: var container = _client.GetContainerReference("test"); 16: container.CreateIfNotExists(); 17: var blob = container.GetBlockBlobReference(name); 18: blob.PutBlockList(ids); 19: } 20: catch (Exception e) 21: { 22: error = e.ToString(); 23: } 24: 25: return new JsonResult() 26: { 27: Data = new 28: { 29: success = string.IsNullOrWhiteSpace(error), 30: error = error 31: } 32: }; 33: } Now we finished all code we need. The whole process of uploading would be like this below. Below is the full client side JavaScript code. 1: <script type="text/javascript" src="~/Scripts/async.js"></script> 2: <script type="text/javascript"> 3: $(function () { 4: $("#upload_button_blob").click(function () { 5: // assert the browser support html5 6: if (window.File && window.Blob && window.FormData) { 7: alert("Your brwoser is awesome, let's rock!"); 8: } 9: else { 10: alert("Oh man plz update to a modern browser before try is cool stuff out."); 11: return; 12: } 13: 14: // start to upload each files in chunks 15: var files = $("#upload_files")[0].files; 16: for (var i = 0; i < files.length; i++) { 17: var file = files[i]; 18: var fileSize = file.size; 19: var fileName = file.name; 20: 21: // calculate the start and end byte index for each blocks(chunks) 22: // with the index, file name and index list for future using 23: var blockSizeInKB = $("#block_size").val(); 24: var blockSize = blockSizeInKB * 1024; 25: var blocks = []; 26: var offset = 0; 27: var index = 0; 28: var list = ""; 29: while (offset < fileSize) { 30: var start = offset; 31: var end = Math.min(offset + blockSize, fileSize); 32: 33: blocks.push({ 34: name: fileName, 35: index: index, 36: start: start, 37: end: end 38: }); 39: list += index + ","; 40: 41: offset = end; 42: index++; 43: } 44: 45: // define the function array and push all chunk upload operation into this array 46: var putBlocks = []; 47: blocks.forEach(function (block) { 48: putBlocks.push(function (callback) { 49: // load blob based on the start and end index for each chunks 50: var blob = file.slice(block.start, block.end); 51: // put the file name, index and blob into a temporary from 52: var fd = new FormData(); 53: fd.append("name", block.name); 54: fd.append("index", block.index); 55: fd.append("file", blob); 56: // post the form to backend service (asp.net mvc controller action) 57: $.ajax({ 58: url: "/Home/UploadInFormData", 59: data: fd, 60: processData: false, 61: contentType: "multipart/form-data", 62: type: "POST", 63: success: function (result) { 64: if (!result.success) { 65: alert(result.error); 66: } 67: callback(null, block.index); 68: } 69: }); 70: }); 71: }); 72: 73: // invoke the functions one by one 74: // then invoke the commit ajax call to put blocks into blob in azure storage 75: async.series(putBlocks, function (error, result) { 76: var data = { 77: name: fileName, 78: list: list 79: }; 80: $.post("/Home/Commit", data, function (result) { 81: if (!result.success) { 82: alert(result.error); 83: } 84: else { 85: alert("done!"); 86: } 87: }); 88: }); 89: } 90: }); 91: }); 92: </script> And below is the full ASP.NET MVC controller code. 1: public class HomeController : Controller 2: { 3: private CloudStorageAccount _account; 4: private CloudBlobClient _client; 5: 6: public HomeController() 7: : base() 8: { 9: _account = CloudStorageAccount.Parse(CloudConfigurationManager.GetSetting("DataConnectionString")); 10: _client = _account.CreateCloudBlobClient(); 11: } 12: 13: public ActionResult Index() 14: { 15: ViewBag.Message = "Modify this template to jump-start your ASP.NET MVC application."; 16: 17: return View(); 18: } 19: 20: [HttpPost] 21: public JsonResult UploadInFormData() 22: { 23: var error = string.Empty; 24: try 25: { 26: var name = Request.Form["name"]; 27: var index = int.Parse(Request.Form["index"]); 28: var file = Request.Files[0]; 29: var id = Convert.ToBase64String(BitConverter.GetBytes(index)); 30: 31: var container = _client.GetContainerReference("test"); 32: container.CreateIfNotExists(); 33: var blob = container.GetBlockBlobReference(name); 34: blob.PutBlock(id, file.InputStream, null); 35: } 36: catch (Exception e) 37: { 38: error = e.ToString(); 39: } 40: 41: return new JsonResult() 42: { 43: Data = new 44: { 45: success = string.IsNullOrWhiteSpace(error), 46: error = error 47: } 48: }; 49: } 50: 51: [HttpPost] 52: public JsonResult Commit() 53: { 54: var error = string.Empty; 55: try 56: { 57: var name = Request.Form["name"]; 58: var list = Request.Form["list"]; 59: var ids = list 60: .Split(',') 61: .Where(id => !string.IsNullOrWhiteSpace(id)) 62: .Select(id => Convert.ToBase64String(BitConverter.GetBytes(int.Parse(id)))) 63: .ToArray(); 64: 65: var container = _client.GetContainerReference("test"); 66: container.CreateIfNotExists(); 67: var blob = container.GetBlockBlobReference(name); 68: blob.PutBlockList(ids); 69: } 70: catch (Exception e) 71: { 72: error = e.ToString(); 73: } 74: 75: return new JsonResult() 76: { 77: Data = new 78: { 79: success = string.IsNullOrWhiteSpace(error), 80: error = error 81: } 82: }; 83: } 84: } And if we selected a file from the browser we will see our application will upload chunks in the size we specified to the server through ajax call in background, and then commit all chunks in one blob. Then we can find the blob in our Windows Azure Blob Storage. Optimized by Parallel Upload In previous example we just uploaded our file in chunks. This solved the problem that ASP.NET MVC request content size limitation as well as the Windows Azure load balancer timeout. But it might introduce the performance problem since we uploaded chunks in sequence. In order to improve the upload performance we could modify our client side code a bit to make the upload operation invoked in parallel. The good news is that, “async.js” library provides the parallel execution function. If you remembered the code we invoke the service to upload chunks, it utilized “async.series” which means all functions will be executed in sequence. Now we will change this code to “async.parallel”. This will invoke all functions in parallel. 1: $("#upload_button_blob").click(function () { 2: // assert the browser support html5 3: ... ... 4: // start to upload each files in chunks 5: var files = $("#upload_files")[0].files; 6: for (var i = 0; i < files.length; i++) { 7: var file = files[i]; 8: var fileSize = file.size; 9: var fileName = file.name; 10: // calculate the start and end byte index for each blocks(chunks) 11: // with the index, file name and index list for future using 12: ... ... 13: // define the function array and push all chunk upload operation into this array 14: ... ... 15: // invoke the functions one by one 16: // then invoke the commit ajax call to put blocks into blob in azure storage 17: async.parallel(putBlocks, function (error, result) { 18: var data = { 19: name: fileName, 20: list: list 21: }; 22: $.post("/Home/Commit", data, function (result) { 23: if (!result.success) { 24: alert(result.error); 25: } 26: else { 27: alert("done!"); 28: } 29: }); 30: }); 31: } 32: }); In this way all chunks will be uploaded to the server side at the same time to maximize the bandwidth usage. This should work if the file was not very large and the chunk size was not very small. But for large file this might introduce another problem that too many ajax calls are sent to the server at the same time. So the best solution should be, upload the chunks in parallel with maximum concurrency limitation. The code below specified the concurrency limitation to 4, which means at the most only 4 ajax calls could be invoked at the same time. 1: $("#upload_button_blob").click(function () { 2: // assert the browser support html5 3: ... ... 4: // start to upload each files in chunks 5: var files = $("#upload_files")[0].files; 6: for (var i = 0; i < files.length; i++) { 7: var file = files[i]; 8: var fileSize = file.size; 9: var fileName = file.name; 10: // calculate the start and end byte index for each blocks(chunks) 11: // with the index, file name and index list for future using 12: ... ... 13: // define the function array and push all chunk upload operation into this array 14: ... ... 15: // invoke the functions one by one 16: // then invoke the commit ajax call to put blocks into blob in azure storage 17: async.parallelLimit(putBlocks, 4, function (error, result) { 18: var data = { 19: name: fileName, 20: list: list 21: }; 22: $.post("/Home/Commit", data, function (result) { 23: if (!result.success) { 24: alert(result.error); 25: } 26: else { 27: alert("done!"); 28: } 29: }); 30: }); 31: } 32: }); Summary In this post we discussed how to upload files in chunks to the backend service and then upload them into Windows Azure Blob Storage in blocks. We focused on the frontend side and leverage three new feature introduced in HTML 5 which are - File.slice: Read part of the file by specifying the start and end byte index. - Blob: File-like interface which contains the part of the file content. - FormData: Temporary form element that we can pass the chunk alone with some metadata to the backend service. Then we discussed the performance consideration of chunk uploading. Sequence upload cannot provide maximized upload speed, but the unlimited parallel upload might crash the browser and server if too many chunks. So we finally came up with the solution to upload chunks in parallel with the concurrency limitation. We also demonstrated how to utilize “async.js” JavaScript library to help us control the asynchronize call and the parallel limitation. Regarding the chunk size and the parallel limitation value there is no “best” value. You need to test vary composition and find out the best one for your particular scenario. It depends on the local bandwidth, client machine cores and the server side (Windows Azure Cloud Service Virtual Machine) cores, memory and bandwidth. Below is one of my performance test result. The client machine was Windows 8 IE 10 with 4 cores. I was using Microsoft Cooperation Network. The web site was hosted on Windows Azure China North data center (in Beijing) with one small web role (1.7GB 1 core CPU, 1.75GB memory with 100Mbps bandwidth). The test cases were - Chunk size: 512KB, 1MB, 2MB, 4MB. - Upload Mode: Sequence, parallel (unlimited), parallel with limit (4 threads, 8 threads). - Chunk Format: base64 string, binaries. - Target file: 100MB. - Each case was tested 3 times. Below is the test result chart. Some thoughts, but not guidance or best practice: - Parallel gets better performance than series. - No significant performance improvement between parallel 4 threads and 8 threads. - Transform with binaries provides better performance than base64. - In all cases, chunk size in 1MB - 2MB gets better performance. Hope this helps, Shaun All documents and related graphics, codes are provided "AS IS" without warranty of any kind. Copyright © Shaun Ziyan Xu. This work is licensed under the Creative Commons License.

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Mac OS X Snow Leopard: permissions changed on /var results in dns lookup issues

- by Ivan

I was attempting to solve an issue ("/var/log/msmtp.log: permissions denied" error when attempting to send mail using msmtp) when I did this: > chmod -R 770 /var After that, my machine would not resolve domain names via cURL. (ping also fails) But, oddly, I can enter domain names into Safari and visit any web pages w/o a problem... I'm actually not sure if the chmod command is the cause of the problem, but I suspect it is. Also, if I ls -l on /var (or /private/var) it doesn't seem that any of the subdirectories or files there actually changed permission, but there are many, so I can't say that conclusively... Incidentally, I fixed the original error (msmtp.log permission denied) by setting TMPDIR=/tmp in my local environment (bash). Now the error goes away, but I get this error: msmtp: cannot locate host domainname.org: nodename nor servname provided, or not known Any ideas about how to go about getting DNS working again?

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PHP Filter, how to filter input array

- by esryl

I am using PHP filter to perfom basic sanitization and validation of form data. The principle problem I am having is that I mark my form up so that all the data is in one array for the POST input. e.g. form fields, page[name], page[slug], page[body], page[status], etc. Using the following: filter_input(INPUT_POST, 'page[name]', FILTER_SANITIZE_STRING); OR filter_input(INPUT_POST, "page['name']", FILTER_SANITIZE_STRING); I am unable to access the variable. Can someone please tell me the correct name to use to access array data using filter_input()

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Mounting /var /tmp /var/log to separate partition

- by William MacDonald

Per DISA hardening requirements for RHEL, I'm supposed to make sure a number of locations on the filesystem are mounted on separate partitions. A few of the locations they specify include /var /tpm /var/log etc. Is it possible to go about doing this on a live machine (without booting a separate OS)? And how would I go about doing that. I've backed up the OS so if I do screw something up I can recover. Thanks!

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SCO UNIX problem: "Cannot create /var/adm/utmp or /var/adm/utmpx"

- by Maktouch

Hey everyone, I have an old server that doesn't boot. I don't know the version of unix installed, but I see SCO UNIX. It stops with that error: UX:init: ERROR: Cannot create /var/adm/utmp or /var/adm/utmpx UX:init: ERROR: failed write of utmpx entry: " " UX:init: ERROR: failed write of utmpx entry: " " UX:init: INFO: SINGLE USER MODE After that message, it just stops. I cannot write or press anything. Even CTRL + ALT + DEL does not work. I cannot get into the system. I have tried booting with a DamnSmallLinux LiveCD but it does not recognize the file system on HDA. Is there a way to either log in as root or bypass this error? Thanks.

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Apply LADSPA filter to only one channel of multichannel output with Alsa and PulseAudio

- by justinzane

I want to apply a filter, specifically SWH's glame-bandpass-iir, to only one of several output channels. I want unfiltered output to go to the front, rear and LFE channels with bandpass filtered output for the center channel. I'm assuming that this needs to be done with Alsa's /etc/asound.conf but I cannot understand the documentation well enough to figure out how. If there is a better way, via PulseAudio, Jack or whatever, I'm open to whatever works. Thanks.

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Got a static var which is working, now need to get dynamic var which isnt working

- by Ritz

got this variable var zvmlist = { 'Huishoudelijke hulp': 'Huishoudelijke hulp', 'Verpleging thuis': 'Verpleging thuis', 'Verzorging thuis': 'Verzorging thuis', '24 uurs zorg': '24 uurs zorg', 'Ondersteunende begeleiding': 'Ondersteunende begeleiding', }; this var is used in a function to create a dropdownlist. $.each(zvmlist, function(key, value) { var selected=''; if(key==eventdata.title){var selected='selected' } $('<option value="'+key+'" '+selected+'>'+value+'</option>').appendTo($('#calendar_edit_entry_form_title')); }); which works lika a charm. Now i created a function to fetch the list from a mysql table. $.get('get_zorgvormen.php', function(data) { var zvmlist = '{'+data+'}'; //alert(zvmlist); }); when i enable the alert function it shows me the var(array). But i it wont act as a variable. How can i pass this data to my .each function? see it in action here: http://www.zorgzuster-zeeland.nl/site/static/calendar_test.php

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