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• Do url shortening services shorten the id or directly the url?

  - by Tatu Meriläinen

  Assuming the urls are saved to a database where they each have id and the url saved. For example a url www.example.com (let's say with id 1000) would possibly be shortened to www.url.com/c1hd5 etc. Is the url www.example.com shortened to c1hd5 with base64 or similar or are the ids shortened? The 566 id could be shortened like this: 1 = 1, 2 = 2, ... 9 = 9, 10 = a. The 1000 id would be fE if we used every possible letter from a-Z and - _. Is it good idea to use ids from database to shorten urls?

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• What program do you use to write technical documentation?

  - by Tatu Ulmanen

  I'm writing an architecture/technical documentation for an inhouse project and I'm becoming more and more frustrated with Microsoft Word as I seem to use most of my time getting things to align correctly. Word has horrible usability issues but I didn't come here to rant, rather I'd like to know whether there exists something more suitable for the job. The point of this documentation is to provide a "big picture" of the system, and as such I'm not generating documentation from source code but rather writing it all by hand. Are there any alternatives to Microsoft Word for writing properly formatted technical documentation with less frustration?

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• How do I stop postfix from handling my mail?

  - by Tatu Ulmanen

  Here's the situation: I have a domain, let's say domain.com. That domain has Google Apps for Business enabled, so all mail delivered to @domain.com will end up at Google (MX records point to Google). I have a PHP script at domain.com that I use to send mail to myself. But when the PHP script tries to send mail to [email protected], Postfix at that server decides that the recipient is a local user (because the address matches the domain Postfix itself is at), and tries to deliver the mail locally. But inevitably fails as the mailbox cannot be found. How can I instruct Postfix to not try to handle locally any emails to @domain.com and just send them forward so Google can pick them up? I have already removed $myhostname from mydestination field in Postfix's main.cf file, and I have restarted Postfix but Postfix still tries to deliver the mail locally. Here's a snip from mail.log that show the problem (addresses replaced): postfix/pickup[20643]: AF718422E5: uid=33 from=<server> postfix/cleanup[20669]: AF718422E5: message-id=<62e706bcca5a0de0bfec6baa576d88a5@server> postfix/qmgr[20642]: AF718422E5: from=<server>, size=517, nrcpt=1 (queue active) postfix/pipe[20678]: AF718422E5: to=<[email protected]>, relay=dovecot, delay=0.62, delays=0.47/0.03/0/0.13, dsn=5.1.1, status=bounced (user unknown) postfix/bounce[20680]: AF718422E5: sender non-delivery notification: 29598422E7 postfix/qmgr[20642]: AF718422E5: removed

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• Postfix sendmail -bs shows no output - permissions?

  - by Tatu Ulmanen

  When I run the sendmail -bs command as root, I get the expected output: $ sudo sendmail -bs 220 mydomain.com ESMTP Postfix ehlo localhost 250-mydomain.com 250-PIPELINING 250-SIZE 15728640 250-ETRN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN But when I run the same command without sudo, I get no output at all and sendmail doesn't respond to any commands: $ sendmail -bs ehlo localhost quit wtf ^C $ How can I configure Postfix so that sendmail works for every user (or at least for some specific users)? I need this because SwiftMailer for PHP uses sendmail -bs for sending mails and fails when it can't find any output.

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• Server not accepting uploads

  - by Tatu Ulmanen

  I'm having a strange problem with my VPS: I can download files from it, I can use PuTTy to connect to it and all behaves normally. But sometimes, when I try to upload a file to the server or save a file via SFTP, the connection inexplicably fails. I am using jEdit to edit files remotely via SFTP. When it works, it works fine. When it doesn't, I get an error message: Cannot save: java.io.IOException: inputstream is closed Cannot save: java.io.IOException: 4: I can see that a temporary save file (#file.php#save#) is created on the server with a filesize of 0. So the connection works, but when it comes to sending the actual data, something fails. The same thing with WinSCP, but the error is different: Copying file fatally failed. Copying files to remote side failed. And I can always browse the server with PuTTy without a problem. I see nothing abnormal in any log files. Auth.log shows this when I try to save: sshd[32638]: Accepted password for - from - port 62272 ssh2 sshd[32638]: pam_unix(sshd:session): session opened for user - by (uid=0) sshd[32640]: subsystem request for sftp sshd[32638]: pam_unix(sshd:session): session closed for user - When I wait for a while (say, an hour), everything works fine again. It can't be a temporary ban, as I am still allowed to connect to the server, right? I know this may not be enough info to solve the problem, but I am grateful for any clues or bits of information that might help me. What are the possible causes for this kind of behaviour, what log files can I check for clues etc.. I'm running out of ideas!

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• Inserting Google Maps into a WYSIWYG editor, then saving and retrieving properly

  - by Tatu Ulmanen

  Hi, I'm trying to extend jWysiwyg with an function to add a map from Google Maps. I can get the map all right, but I'm having problems with how to handle the generated map so it can be saved with the page and then retrieved. To open the process up a bit: User enters editor which is created using jWysiwyg. User clicks on a button which asks for an address, then returns the corresponding latitude and longitude. I use this location information to create a map using Google Maps API (V3), which I then insert into the editable WYSIWYG area. When I save the page, the whole Google generated HTML gets saved into the database, which will not work properly when opened next time (I get a grey box when I open up the page again). Now, the problem is that I need to insert the map in such a format that it will work afterwards (perhaps using <script> tags). I also need the map to be visible in the WYSIWYG editor itself, so I cannot just put in a placeholder tag which would later be populated with the correct map data. So, in short; how would you insert a Google Map into a WYSIWYG editor in a way that it is both visible/previewable from the editor itself and could also be saved in a format that would work properly when opened the next time?

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• How to embed images in a single HTML / PHP file?

  - by Tatu Ulmanen

  Hi, I am creating a lightweight, single-file database administration tool and I would like to bundle some small icons with it. What is the best way to embed images in a HTML/PHP file? I know a method using PHP where I would call the same file with a GET parameter that would output hardcoded binary data with the correct header, but that seems a bit complicated. Can I use something to pass the image directly in a CSS background-image declaration? This would allow me to utilize the CSS sprite technique. Browser support isn't an issue here, so more exotic methods are welcome also. EDIT Does someone have a link/example to how to generate Data URL's properly with PHP? I'd figure echo 'data:image/png;base64,'.base64_encode(file_get_contents('image.png')) would suffice but I could be wrong.

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• Set textarea selection in Internet Explorer

  - by Tatu Ulmanen

  I'm looking for a way to set a selection in a textarea in Internet Explorer. In other browsers, this works just fine: textarea.selectionStart = start; textarea.selectionEnd = end; In IE, I assume I have to use createRange and adjust the selection somehow, but I cannot figure out how. Extra bonus points for a link to a proper documentation about createRange and associated methods, MSDN isn't helping out much.

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• How to retrieve email from GMail account using PHP?

  - by Tatu Ulmanen

  Hi, I'm trying to automatically retrieve some email from my GMail account for further parsing, but I can't get my head around on how to do that. I've searched the internets and it suggested that I use PHP's imap functions, like this: $server = '{imap.gmail.com:993/ssl}'; $connection = imap_open($server, '[email protected]', 'password'); But using that code, I get: Warning: imap_open() [function.imap-open]: Couldn't open stream {imap.gmail.com:993/ssl} Any idea what I am doing wrong? Any server setting that might be preventing me from making a connection to GMail (I'm using a shared service)? Is the address even right? Has anyone ever managed to do something like this? I've found tons of examples on how to send email via GMail, but very little of retrieving. Any help is much appreciated.

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• How to select elements from a set that are children of another element

  - by Tatu Ulmanen

  Hi, The title is a bit confusing but here's what I'm after: I have a set of elements containing all the h3 elements in a page. In jQuery terms: var mySet = $('h3'). I also have an div element var myContainer = $('div#foo') I need to find all items in the set mySet that are children of myContainer. Any ideas? I bet there's some magical one liner for this but I cannot think of any. I'd rather not loop through every element in the set manually and use .closest(myContainer) or something like that to determine the relationship. Note that in my scenario, I cannot use a new selector like $('div#foo h3') (that would be too easy) as I don't have access to the actual selector values. So it has to be dynamic.

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