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• User Session Management with Spring

  - by Chris

  I am developing a flex java - spring web app and have set up the business logic using hibernate. I want to maintain sessions so that when the user logs in , i can track the logged in user to display information that is related to the username. I want to do this using spring if possible and wondered if anyone could redirect me to a tutorial or even explain the method to which this is achieved , or if it is hard to achieve. Thanks Chris

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• Which unit test framework in VS2010 - MSTest or NUnit?

  - by Greg

  Any recommendations re whether to got MSTest or NUnit for a new project in VS2010 (C#), mainly focused at business logic layer unit tests? Is there any major reason why I wouldn't just go with the VS2010 MSTest which is integrated there?

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• Open ports for Apache Tomcat-7.0.32 on Linux Mandriva

  - by ivanov-void

  I installed Apache Tomcat-7.0.32 on Linux Mandriva and I want to make it accessible. for this I need to open ports in iptables. I added the following rules- iptables -A INPUT -p tcp -m tcp --dport 8081 --syn -j ACCEPT iptables -A INPUT -p tcp -m tcp --dport 8010 --syn -j ACCEPT iptables -A INPUT -p tcp -m tcp --dport 8444 --syn -j ACCEPT iptables -A INPUT -p tcp -m tcp --dport 8006 --syn -j ACCEPT then save and restart iptables - /etc/init.d/iptables save /etc/init.d/iptables restart verify, that ports is open - netstat -tulpn | less I am running command - netstat-ntpl | grep java and see - When I disable the firewall, I see the start page of the server on request - http://server_ip:8081/ When enable - server not accessible from outside. In what may be the cause? I would be most grateful for the information! Thank you!

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• Bad request - Invalid Hostname Error when using ARR IP address

  - by syloc

  I'm trying to setup a simple ARR system. I have 1 ARR machine load balancing between 2 APP servers. I can reach the app sites if i use the server name of the ARR machine. (http://arrserver/app) But i can't do it with its IP address. (http://10.7.10.25/app). It gives the "Bad Request - Invalid Hostname". In the ARR machine i configured the default site's bindings to "All Unassigned","80" (default values). Do i need to change the binding rule or need additional url rewrite rules? And also, in the ARR server http://127.0.0.1/app doesn't work. But http://localhost/app works fine. Thx in advance

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• Reading Web 2.0 HTML Source Code with Perl

  - by Sammy

  Is it possible to read HTML Web 2.0 Source Code that is dynamically generated ? The Perl LWP with its agent-response does not pick up any dynamically generated HTML code. Many websites today are generating dynamic html. If I am shoppping for best prices, and the prices are dynamically fetched and dumped, then I am out of business. Are we reaching the end of a era?

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• Can't reach custom C# forms application remotely.

  - by gnucom

  Hello, I'm working in Windows Server 2008. I have a very basic C# forms application (not a service) that is listening on a port, say 56112. When using telnet I can connect from the localhost and send and receive data. For some reason I cannot remotely connect to the application. I know I have a connection because I can telnet to 23 on the remotely fine. I've opened this port on the firewall, created rules in/out in advanced firewall, disabled the firewall completely, and more. Any suggestions would be great! This is the telnet output: Microsoft Telnet> open server.cc 56112 Connecting server.cc...Could not open connection to the host, on port 56112: Connect failed

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• iptables: built-in INPUT chain in nat table?

  - by ughmandaem

  I have a Gentoo Linux system running linux 2.6.38-rc8. I also have a machine running Ubuntu with linux 2.6.35-27. I also have a virtual machine running Debian Unstable with linux 2.6.37-2. On the Gentoo and Debian systems I have an INPUT chain built into my nat table in addition to PREROUTING, OUTPUT, and POSTROUTING. On Ubuntu, I only have PREROUTING, OUTPUT, and POSTROUTING. I am able to use this INPUT chain to use SNAT to modify the source of a packet that is destined to the local machine (imagine simulating an incoming spoofed IP to a local application or just to test a virtual host configuration). This is possible with 2 firewall rules on Gentoo and Debian but seemingly not so on Ubuntu. I looked around for documentation on changes to the SNAT target and the INPUT chain of the nat table and I couldn't find anything. Does anyone know if this is a configuration issue or is it something that was just added in more recent versions of linux?

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• Sendmail.mc: alias all incoming e-mails to one account

  - by Angus

  I need to alias all mail coming from another SMTP server to this one account "myinbox". The system in question is to receive all e-mail on the domain, if that's any help. http://william.shallum.net/random-notes/sendmailredirectallmailfordevelopment is a template for the beginning of a solution, but that routes everything (including outgoing and internal mail) to that one account, and trying to understand how these R rules work is making my head spin. I think the answer is in sendmail.mc rather than any Procmail configuration. So I think what I generally don't want the filter to do is: Interfere w/any outgoing e-mail Interfere w/any internal e-mail Sometimes some cron job causes "root" to mail to "root". I don't want these to go to myinbox. Cause infinite loops Who does? Bounce messages and any DSNs come to mind. I'm running Sendmail 8.13.1 and Procmail 3.22.

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• Using Apache Environment Variables to set custom ErrorDocument

  - by Tad

  I've got a set of RewriteCond rules that test for various mobile devices and then set environment variables like "env=device:.iphone" or "env=device:.smartphone" if the useragent matches an iPhone or Android device. I'm trying to now redirect the user to custom-styled 404/500 server error pages for each device, by way of the error pages. Ideally I'd like to be able to test for a variable being there, and then write in a custom ErrorDocument string. But an apache doesn't seem to work in this case. Any ideas how I can construct if/else tests in an apache conf file for environment vars?

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• Which is quicker, file_get_contents, fopen(fread) or curl?

  - by David B.

  I need to open and read a small XML file on a remote server -- speed is critical. Which option provides the quickest way of doing business?

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• Remove then Query fails in JPA/Hibernate (deleted entity passed to persist)

  - by Kevin

  I've got a problem with the removal of entities in my JPA application: basically, I do in this EJB Business method: load photo list ; for each photo { //UPDATE remove TagPhoto element from @OneToMany relation //DISPLAY create query involving TagPhoto ... } and this last query always throws an EntityNotFoundException (deleted entity passed to persist: [...TagPhoto#]) I think I understand the meaning of this exception, like a synchronization problem caused by my Remove, but how can I get rid of it?

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• LINQ2SQL: how many datacontexts ?

  - by sh00

  I have a SQL Server 2008 database with 300 tables. The application I have to design is an Windows Forms app, .NET 3.5, C#. Which is the best way to work with LINQ2SQL ? I intend to make a datacontext for each business entity. Is there any problem ? I need to know if this way of working with LINQ has any disadvantage or can create performance issues ? Thanks.

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• Why can't my networks reach each other?

  - by HOLOGRAPHICpizza

  We have two Buffalo WZR-HP-G300NH2 routers, with the default firmware, DD-WRT v24SP2-MULTI (10/31/11) std - build 17798. Each has a separate cable internet connection with a public static IP address. They are both in the 24.123.68.0/24 space. Both of them can contact pretty much the whole internet, and they can both be accessed out on the internet with no problem, but for some reason they can't talk to each other! When I try to ping one from the other I always get "Destination Host Unreachable". There are no strange routing or firewall rules in place. And they are both set to respond to pings, I can ping them from outside. Our main IT guy is going to call our ISP on Monday, but I'm impatient, so does anyone have any ideas?

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• Website content crawling

  - by klork

  We have a Business Listings directory hosted on IIS 6 Windows 2003. Our competitors crawl and steal our content and customers. We have tried IP blocking using honeypot URLs and log parsing without much success. Is anyone aware of a network device or a proxy server that I can run in front of my web server to minimize this issue? All suggestions are highly appreciated.

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• Key Value Database For Windows?

  - by Axl

  Other than MongoDB and Memcached, what key-value stores run on Windows? Most of the ones I've seen seem to only run on Linux (Hypertable, Redis, Lightcloud). Related links: http://stackoverflow.com/questions/639545/is-there-a-business-proven-cloud-store-keyvalue-database-open-source http://www.metabrew.com/article/anti-rdbms-a-list-of-distributed-key-value-stores/

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• How to find the ocean using Google Maps API

  - by geejay

  I am trying to figure out where the ocean is in an arbitrary Google Maps view. I actually have the lat lon (a range of points, when joined together form the coastline) of the coastline. But how do I tell which side of this line is the coastline? One possible solution would be to find the latlon of the nearest service or town or business or something, and then the ocean is obviously on the other side (given a small enough enclosing polygon). Is there a better way?

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• copy and Search Web services

  - by user171523

  We are in the process of integrating ASP.NET Business App with Sharepoint. I have some Design questions. Requirement - From ASP.NET buz application we upload document to Sharepoint Doc Lib 2010 using Web Services. And perform a Search using Serach web service. I would like to know from group are there any disadvantages doing this? Performance etc .. What kind of seacurity consideration i need to be thinking of.

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• How can I set up a rule in outlook for an alias account?

  - by lucy

  I have 4 email aliases that all deliver to the same outlook inbox. 2 of them are stop@ addresses to be included in a mailing unubscribe link. Using the simple rules in outlook doesnt work, unless we set them to move emails titled stop, but for ease of unsubscribing, we do not want responders to have to do anything other than send a blank email to the stop@ address. Our IT guy tried to sort this out, by setting up a rule that all emails sent to stop@ got into a specified folder (stop folder created within inbox), but now, all that happens is all my emails go into the wrong boxes!!! Any help would be appreciated

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• Steps to make sure network is not blacklisted...Again

  - by msindle

  I have an interesting issue. I have a client that just got blacklisted due to spam being sent out over the last 2 days. I have my firewall configured to only allow mail to go outbound on port 25 from our mail server (Exchange 2010) exclusively and I have verified that there are no open relay's on our transport rules. We are running Vipre Business and after running deep scans with updated definitions all computers come back clean. I ran a message tracking report on our Exchange server that shows all mail sent via the mail server over the last couple of weeks and didn't see anything malicious or out of the ordinary. I have also verified that there are no home devices or rouge computers on the network. For all practical purposes it appears that the network is clean, but we still wound up on 5 or 6 blacklists...Where should I start looking next? Is there a "best practices" guide that can help eradicate this issue? Thanks in advance! msindle

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• Rewrite for robots.txt and favicon.ico [closed]

  - by BHare

  I have setup some rules in which subdomains (my users) will default to where I have located the robots.txt, favicon.ico, and crossdomain.xml therefore if a user creates a site say testing.mywebsite.com and they don't make their own favicon.ico at testing.mywebsite.com/favicon.ico, then it will use the favicon.ico I have in /misc/favicon.ico This works perfect, but it doesn't work for the main website. If you attempt to go to mywebsite.com/favicon.ico it will check if "/" exists, in which it does. And then never redirects to /misc/favicon.ico How can I get it so both instances redirect to /misc/favicon.ico ? # Set all crossdomain (openpalace file) favorite icons and robots.txt doesnt exist on their # side, then redirect to site's just to have something to go on. RewriteCond %{REQUEST_URI} crossdomain.xml$ RewriteCond ^(.+)crossdomain.xml !-f RewriteRule ^(.*)$ /misc/crossdomain.xml [L] RewriteCond %{REQUEST_URI} favicon.ico$ RewriteCond ^(.+)favicon.ico !-f RewriteRule ^(.*)$ /misc/favicon.ico [L] RewriteCond %{REQUEST_URI} robots.txt$ RewriteCond ^(.+)robots.txt !-f RewriteRule ^(.*)$ /misc/robots.txt [L]

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• DataGridview repaints very slowly

  - by Emad Suria

  I'm using datagridview in windows application developed in C# VS2005 .net 2.0. Datagridview is provided a list of business objects. It take annoying delay of 2-3 seconds before starting displaying the rows in datagridview in falling-curtain fashion. When I switch back to my application from any other window it start repaint process in the same falling-curtain fashion. This is quite annoying. Plz someone help me sort this out!

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• Statistics of IMAP vs POP vs Exchange ?

  - by Antares

  Hello, I'm desperately looking for some statistics about usage of POP versus IMAP versus Exchange-MAPI, especially in professional context. I know IMAP is used for accessing mails from mobile devices with limited bandwidth, whereas POP is the good old standard, and Exchange is more business-oriented. Does someone know the approximate percentage of usage of each protocol ? Thanks !

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• Can't Allow Specific Port in Windows Firewall Advanced Security - Windows 2008

  - by Jody

  In the Outbound Rules, I set up a rule to allow outbound connection from port 26. But, it doesn't work. However, if I allow "all port" for this rule, this will work, but then all ports will be allowed too. What is the reason? Is there any conflicting rule? I need to fix this as soon as possible. -Edit to add : I'm trying to allow email access to mail server outside (port 26). The thing is, even if I telnet using port 26, it will not work, unless I allow "all ports". Specific port will not do.

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• To decide where to crop an image, how can I highlight it's most compressible areas?

  - by Umber Ferrule

  I'm looking to get the most compression out of each of the most popular image formats, such as, JPEG, PNG, GIF, etc. Ideally, this would be a tool, or a series of transforms that could be performed (perhaps using a macro and then discarded) in popular image editors (Paint.NET/PaintShopPro/PhotoShop/GIMP) to highlight areas which will compress less. Alternatively, what rules of thumb can be used other than reducing colours (for PNG/GIF), reducing image dimensions, avoiding high detail areas... I'm not asking for help deciding what format to use for a particular image type as I think this is fairly common knowledge, i.e. diagram and images with few colours = PNG/GIF, photographs = JPEG.

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• How can I debug Cisco Firewall ASA "Dispatch Unit" very high CPU utilisation from ASDM?

  - by Andy

  I have recently had my first firewall installed so I am very new to this whole situation. I am finding that Dispatch unit is becoming overloaded and it would appear to be the reason I get serious bouts of lag on my server. The firewall has had little configuration apart from me blocking all the ports in "Access Rules" and allowing only the ones the server needs and from where it needs them. I guess what I am after is assistance with locating the issues causing "Dispatch Unit" to take up all the CPU Regards --Edit-- With ASDM statistics I found that packets inbound (peak of 70-100k/sec from <1k/sec normal), traffic inbound (peak of 40-50kbits/sec from <1kbits/sec normal) and CPU all peak at the same time so I am pretty sure it is an attack of some sort but as a beginner with ASA I am not sure how to resolve

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