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• Implementation communication protocols in C/C++

  - by MeThinks

  I am in the process of starting to implement some proprietary communication protocol stack in software but not sure where to start. It is the kind of work I have not done before and I am looking for help in terms of resources for best/recommended approaches. I will be using c/c++ and I am free to use use libraries (BSD/BOOST/Apache) but no GPL. I have used C++ extensively so using the features of C++ is not a problem. The protocol stack has three layers and it is already fully specified and formally verified. So all I need to do is implemented and test it fully in the specified languages. Should also mention that protocol is very simple but can run on different devices over a reliable physical transport layer Any help with references/recommendations will be appreciated. I am willing to use a different language if only to help me understand how to implement them but I will have to eventually resort to the language of choice.

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• diff implementation in Java

  - by Frór

  Hi, I'm looking for a diff implementation in Java. I've seen that Python has its own SequenceMatcher (with difflib), which is exactly what I need... in Java. Is there any portage? Or is there any other class/library that performs the same in Java? If not, where can I find the source code of that difflib (if free as in speech) to make my own implementation of SequenceMatcher in Java ? Unfortunately, Apache Commons Lang doesn't help me much. Thanks!

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• what this `^` mean here in solr

  - by Rahul Mehta

  I am confuse her but i want to clear my doubt. I think it is stupid question but i want to know. Use a TokenFilter that outputs two tokens (one original and one lowercased) for each input token. For queries, the client would need to expand any search terms containing upper case characters to two terms, one lowercased and one original. The original search term may be given a boost, although it may not be necessary given that a match on both terms will produce a higher score. text:NeXT ==> (text:NeXT^10 OR text:next) what this ^ mean here . http://wiki.apache.org/solr/SolrRelevancyCookbook#Relevancy_and_Case_Matching

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• How to use JAXB APIs to generate classes from xsd?

  - by Simran

  I need to generate bean classes from .xsd without using xjc command or ant. i have found the implementation in Apache Axis2 but i am unable to generate the artifacts. i have written the following code but i get NullPointerException : SchemaCompiler sc = XJC.createSchemaCompiler(); URL url = new URL("file://E:\\JAXB\\books.xsd"); sc.parseSchema(new InputSource(url.toExternalForm())); S2JJAXBModel model = sc.bind(); JCodeModel cm = model.generateCode(null, null); cm.build(new FileCodeWriter(new File("E:\\JAXBTest"))); Can anyone help me / provide some links???

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• Programmatically dial a series of numbers on a modem?

  - by Nathan Long

  At work, we just got a large number exotic cellular devices that need to be programmed. To do this, you plug in a standard home telephone and dial a series of numbers, with pauses between them. To me, this is a task that begs to be automated, and we've got one Linux desktop (a test Asterisk machine) with a modem on it. Does anybody know an easy way to approach this task? I could install Ruby or Python on that desktop. I also know PHP, but I'm not sure how to run it outside of a server setup, and it seems silly to install Apache for this.

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• Problem indexing files in Solr on Ubuntu

  - by nik

  Hi, What I want to do is index some documents in Solr and know how it works. I have installed Solr and Tomcat and can see Solr Admin UI at localhost:8080/ solr/ admin/ Now, I want to add some documents to the index, may I know how to proceed further? I find very less documentation on Internet regarding this. In the tutorial http://lucene.apache.org/solr/tutorial.html#Indexing+Data they asked to run java -jar post.jar solr.xml monitor.xml command but after running that I get connection refused error as it is jetty. After installing jetty I tried telnet: I get "Connection refused" error I am not able to understand what the problem is.

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• Web page with embedded .NET control in IBM WebSphere 6.1

  - by Borat

  Hello, I have very simple web page with embedded .NET control in it via the <object> tag. The problem is that when I deploy it to an IIS server it works fine (the .NET control is shown). The same is for the Apache server. But when I deploy it to the WebSphere server I get the html but the .NET control does not appear. Probably it is some kind of a server configuration issue, but I cannot figure it out. I would appreciate any suggestions. Best regards!

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• The connection was reset

  - by jabberbuzz

  "The connection to the server was reset while the page was loading." Hi, I am trying to load a php page on apache , but none of the static content gets loaded. Using firebug I captured the static url and tried it separately, when I received "The connection was reset" message. The site works other computers mac, windows, linux but no on mine. I have deleted the cache, disabled firewall, changed my dns service and followed every possible suggestion on the web. I have no clue on why this is happening. Stack-overflow has been my bible and has never let me down before, hope it still doesn't ... Thanks a lot in advance .... please please please , i really have to figure out this error. Regards Dilip

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• Getting 403 error when using CSRF filter with tomcat 6.0.32

  - by sps

  This is my filer config in web.xml <filter> <filter-name>CSRFPreventionFilter</filter-name> <filter-class>org.apache.catalina.filters.CsrfPreventionFilter</filter-class> <init-param> <param-name>entryPoints</param-name> <param-value>/login<param-value> </init-param> </filter> <filter-mapping> <filter-name>CSRFPreventionFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter> Am I missing something? Are any code-changes necessary to enable csrf protection in tomcat

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• Longish list of allowed referrers

  - by Tim

  I want to allow hotlinking only from a list of referrers (paying customers, probably a few hundred). I am on Apache 1.3 and I do not have access to the configuration (only .htaccess). What is the fastest way to implement this? My thoughts so far: PHP with database and readfile() (SSI with) Perl and database the list implemented as symlinks named after the allower referrer, then RewriteCond using HTTP_REFERER everything in .htaccess, lots of RewriteCond's everything in .htaccess, lots of SetEnvIf's Any better (faster) ways to do this? Thanks!

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• space in url; did browser got smarter or server?

  - by Xah Lee

  It looks like today you no longer to have to encode spaces by %20 in your html links or image links. For example, suppose you have this image at ?http://example.com/i/my house.jpg?. Notice the space there. In your html code, you can just do this: <img src="http://example.com/i/my house.jpg" alt="my house"> It work in all current version of browsers. Though, what i'm not sure is that whether the browser encodes it before requesting the url, or a particular server will do the right with with paths with space? (apache)

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• PHP connection_aborted doesn't work with nginx?

  - by TheOnly92

  I can't seem to get the function connection_aborted to work with nginx. The code I used to test is as follow: <?php ignore_user_abort(true); ob_implicit_flush(); $i = 0; while (!connection_aborted()) { echo $i; $i++; sleep(1); } file_put_contents('test',$i); In Apache, it works correctly, although it delays a little. i.e. When I press stop button on browser when "3", the 'test' file shows "8". That is an acceptable margin, but on nginx, it doesn't seem to output anything to the 'test' file.

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• Leave entity intact in XML + XSLT

  - by Kuroki Kaze

  I transform XML to (sort of) HTML with XSL stylesheets (using Apache Xalan). In XML there can be entities like &mdash;, which must be left as is. In beginning of XML file I have a doctype which references these entities. What should I do for entity to be left unchanged? <!DOCTYPE article [ <!ENTITY mdash "&mdash;"><!-- em dash --> ]> gives me SAXParseException: Recursive entity expansion, 'mdash' when encountering &mdash in XML text.

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• Should I use Spring or Guice for a Tomcat/Wicket/Hibernate project?

  - by Trevor Allred

  I'm building a new web application that uses Linux, Apache, Tomcat, Wicket, JPA/Hibernate, and MySQL. My primary need is Dependency Injection, which both Spring and Guice can do well. I think I need transaction support that would come with Spring and JTA but I'm not sure. The site will probably have about 20 pages and I'm not expect huge traffic. Should I use Spring or Guice? Feel free to ask and followup questions and I'll do my best to update this.

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• In Sinatra, how can I serve static index.html files in subdirectories in public folder?

  - by socrateos

  I noticed that Sinatra does not recognize index.html files in public folder's subdirectories and returns an error when url is pointing to a directory without specifiying the file name. For example, if user enters a url like "www.mydomain.com/subdiretory/", Sinatra fails to recognize the existence of an index.html file in that directory. There are hundreds of subdirectories in my public folder so that it is impossible to specify each one of them in code (and the number of subdirectories keeps growing). How can I tell Sinatra to leave my web server (Apache) alone (to server index.html file) if there is an index.html file in a subdirectory of public folder when url is pointing to that directory without the file name?

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• timeline charts with rich ui

  - by Karthick R

  hi all, I have a requirement to come up with a time line chart and a few more controls on a single page[with rich ui]. I have short listed Flex, JSF[apache trinidad], html5, gwt these technologies. None of them provide timeline charts on their own. I am looking at other options such as using third party libraries. The chart should have drill down capabilities as well. Let me know if there is any specific technology that I should try. regards

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• Mod_rewrite with multiple variables

  - by Andrei

  Hello, I'm using a PHP script that dynamically generates transparent PNGs for use as CSS backgrounds from a query string that takes RGBa and HSLa values. The original script can be found here, I've only added HSLa support. Because background URLs with PHP query strings aren't very pretty, and because it seems to break the IE 6 transparent PNG hack, I thought of using mod_rewrite to allow the script to be called when a .png with this syntax is called : /assets/colors/h[0-360 value]_s[0-100 value]_l[0-100 value]_a[0-100 value].png which would be rewritten to : /assets/colors.php?h=[0-360 value]&s=[0-100 value]&l=[0-100 value]&a=[0-100 value] Here's the issues I'm encountering : passing multiple variables with mod_rewrite using an underscore as a delimiter I know this could be done by passing a single variable and then exploding it in the PHP script, however I would prefer it to be done by Apache. Thanks in advance and if anyone wants my HSLa enabled version of the script just ask. Anyway I recommend you check it out on it's author's website.

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• Resources for dashboard app backend design

  - by Nix

  I am looking for examples of code/data/infrastructure design for a dashboard-style webapp. I am designing an interface for staff and faculty at a university to access departmental resources and be alerted of cyclical processes, events, deadlines, etc. Technologies I am working with: apache tomcat 6 and a mySQL database, JSP (including JSTL), bootstrap 3, and javascript/jquery. I have basic experience most of these technologies building smaller web apps but was hoping someone could direct me towards a book or other resource that discusses how to design the db architecture (and maybe how to template) for a dashboard, esp. for something like a notification systems. Any suggestions?

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• Win32 script environment for testing http redirects?

  - by Anders Lindahl

  The past few days I've been working with setting up an Apache server on Windows. The server is supposed to host several .htaccess files, each redirecting (or, in some cases, proxying) to different hosts. I want to create tests for these redirectons, and the solution I'm currently considering is a CGI script running on the same server, sending GET requests to it and verifying that it gets the correct redirection headers back. A scripting solution (vscript/jscript) seems worth exploring, but so far I've only managed to rule out Microsoft.XMLHTTP because it follows the redirect "behind the scenes". Are there any libraries or other solutions already present on a reasonably standard Windows Server that can do this kind of low-level HTTP work? If not, any other suggestions of simple environments to set up for verifying redirects?

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• Passing JS variable from child Iframe to parent JSP on cross sub domain

  - by Tarun

  I am stuck at 1 location and need some help. I created two subdomains on apache tomcat server like domain1.localhost.com and domain2.localhost.com in server.xml. On domain1 I have a JSP that includes iFrame (hosted on domain2). How can we pass the JS variable from child Iframe to parent JSP and store it in local variable of JSP hosted on domain1.localhost.com? I tried defining document.domain = "localhost" on both JSP but didn't work. Even parent DOM window is also not available in child iFrame (on sub-domain) because of obvious cross domain policies. Any help would be highly appreciated.

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• Best Practices for a Web App Staging Server (on a budget)

  - by fig-gnuton

  I'd like to set up a staging server for a Rails app. I use git & github, Cap, and have a VPS with Apache/Passenger. I'm curious as to the best practices for a staging setup, as far as both the configuration of the staging server as well as the processes for interacting with it. I do know it should be as identical to the production server as possible, but restricting public access to it will limit that, so tips on securing it only for my use would also be great. Another specific question would be whether I could just create a virtual host on the VPS, so that the staging server could reside alongside the production one. I have a feeling there may be reasons to avoid this, though.

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• Zend Framework additional Get params with NGINX

  - by Johni

  I configured my NGINX for Zend in the following way (PHP 5.3 with fpm): server { root /home/page/public/; index index.php index.html index.htm; server_name localhost; location / { try_files $uri $uri/ /index.php; } location ~ \.php$ { fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; } location ~ /\.ht { deny all; } } Now i want to process additional get params like: http://web.site/index?par=1 WIth my local dev system (Apache) it works fine but not under NGINX which did'T deliver the get params. Anny suggestions? Edit: Now i use the following config which seems to work but i'm not happy with it since everybody suggests "use try_files whenever possible". location / { if (!-e $request_filename) { rewrite /(.*)$ /index.php?q=$1 last; break; } }

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• server.sh gives me following error Exception"main" java.lang.NoClassDefFoundError:

  - by NickNaik

  i am trying to start the "Program D" from the terminal, command in terminal "sh server.sh" gives me following error Starting Alicebot Program D. Exception in thread "main" java.lang.NoClassDefFoundError: org/alicebot/server/net/AliceServer Caused by: java.lang.ClassNotFoundException: org.alicebot.server.net.AliceServer at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) My Server.sh file ALICE_HOME=.SERVLET_LIB=lib/servlet.jar ALICE_LIB=lib/aliceserver.jar JS_LIB=lib/js.jar # Set SQL_LIB to the location of your database driver. SQL_LIB=lib/mysql_comp.jar # These are for Jetty; you will want to change these if you are using a different http server. HTTP_SERVER_LIBS=lib/org.mortbay.jetty.jar:lib/javax.xml.jaxp.jar:lib/org.apache.crimson.jar PROGRAMD_CLASSPATH=$SERVLET_LIB:$ALICE_LIB:$JS_LIB:$SQL_LIB:$HTTP_SERVER_LIBS java -classpath $PROGRAMD_CLASSPATH -Xms64m -Xmx64m org.alicebot.server.net.AliceServer $1

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• Continuations in Java

  - by nobeh

  I am looking for recent work presenting continuations in Java. I have come across the same question here but it dates back for a year or two. There is some work such as JavaFlow by Apache, RIFE Continuations (that I cannot download for any reason now). Also there is a blog post mentioning the support in JDK but it seems that the support will span to Java 8. I also reckon that continuations are also introduced in recent Scala versions. I am looking for implementations in Java presenting the continuations concept. And, I am not looking for the works that present continuation-passing-style (CSP). I'd be thankful for any other work you might know.

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• What's the most scalable way to handle somewhat large file uploads in a Python webapp?

  - by Jason Baker

  We have a web application that takes file uploads for some parts. The file uploads aren't terribly big (mostly word documents and such), but they're much larger than your typical web request and they tend to tie up our threaded servers (zope 2 servers running behind an Apache proxy). I'm mostly in the brainstorming phase right now and trying to figure out a general technique to use. Some ideas I have are: Using a python asynchronous server like tornado or diesel or gunicorn. Writing something in twisted to handle it. Just using nginx to handle the actual file uploads. It's surprisingly difficult to find information on which approach I should be taking. I'm sure there are plenty of details that would be needed to make an actual decision, but I'm more worried about figuring out how to make this decision than anything else. Can anyone give me some advice about how to proceed with this?

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