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• Why do I need the isset() function in php?

  - by Chris

  I am trying to understand the difference between this: if (isset($_POST['Submit'])) { //do something } and if ($_POST['Submit']) { //do something } It seems to me that if the $_POST['Submit'] variable is true, then it is set. Why would I need the isset() function in this case?

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• PHP checking $_POST

  - by sea_1987

  I have some form fields that when a form is submitted creates an array within the $_POST, I needing to check the this array has atleast 4 keys, how can I check that? I have no idea

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• Can' get couchdb external http handlers to work.

  - by fuzzy lollipop

  following the instructions here http://wiki.apache.org/couchdb/ExternalProcesses this is what I get { * error: "{{badarg,[{erlang,port_command, [#Port<0.2056>, [123, [34,<<"info">>,34], 58, [123, [34,"db_name",34], 58, [34,<<"transfer_central">>,34], 44, [34,"doc_count",34], 58,"39441",44, [34,"doc_del_count",34], 58,"0",44, [34,"update_seq",34], 58,"56508",44, [34,"purge_seq",34], 58,"0",44, [34,"compact_running",34], 58,<<"false">>,44, [34,"disk_size",34], 58,"43593828",44, [34,"instance_start_time",34], 58, [34,<<"1272560477320483">>,34], 44, [34,"disk_format_version",34], 58,"5",125], 44, [34,<<"id">>,34], 58,<<"null">>,44, [34,<<"method">>,34], 58, [34,"GET",34], 44, [34,<<"path">>,34], 58, [91, [34,<<"transfer_central">>,34], 44, [34,<<"_test">>,34], 93], 44, [34,<<"query">>,34], 58,<<"{}">>,44, [34,<<"headers">>,34], 58, [123, [34,<<"Accept">>,34], 58, [34, <<"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8,application/json">>, 34], 44, [34,<<"Accept-Charset">>,34], 58, [34,<<"ISO-8859-1,utf-8;q=0.7,*;q=0.7">>,34], 44, [34,<<"Accept-Encoding">>,34], 58, [34,<<"gzip,deflate">>,34], 44, [34,<<"Accept-Language">>,34], 58, [34,<<"en-us,en;q=0.5">>,34], 44, [34,<<"Connection">>,34], 58, [34,<<"keep-alive">>,34], 44, [34,<<"Host">>,34], 58, [34,<<"127.0.0.1:5984">>,34], 44, [34,<<"Keep-Alive">>,34], 58, [34,<<"115">>,34], 44, [34,<<"User-Agent">>,34], 58, [34, <<"Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3">>, 34], 125], 44, [34,<<"body">>,34], 58, [34,"undefined",34], 44, [34,<<"peer">>,34], 58, [34,<<"127.0.0.1">>,34], 44, [34,<<"form">>,34], 58,<<"{}">>,44, [34,<<"cookie">>,34], 58,<<"{}">>,44, [34,<<"userCtx">>,34], 58, [123, [34,<<"db">>,34], 58, [34,<<"transfer_central">>,34], 44, [34,<<"name">>,34], 58,<<"null">>,44, [34,<<"roles">>,34], 58,<<"[]">>,125], 125,10]]}, {couch_os_process,writeline,2}, {couch_os_process,writejson,2}, {couch_os_process,handle_call,3}, {gen_server,handle_msg,5}, {proc_lib,init_p_do_apply,3}]}, {gen_server,call, [<0.110.0>, {prompt,{[{<<"info">>, {[{db_name,<<"transfer_central">>}, {doc_count,39441}, {doc_del_count,0}, {update_seq,56508}, {purge_seq,0}, {compact_running,false}, {disk_size,43593828}, {instance_start_time,<<"1272560477320483">>}, {disk_format_version,5}]}}, {<<"id">>,null}, {<<"method">>,'GET'}, {<<"path">>,[<<"transfer_central">>,<<"_test">>]}, {<<"query">>,{[]}}, {<<"headers">>, {[{<<"Accept">>, <<"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8,application/json">>}, {<<"Accept-Charset">>, <<"ISO-8859-1,utf-8;q=0.7,*;q=0.7">>}, {<<"Accept-Encoding">>,<<"gzip,deflate">>}, {<<"Accept-Language">>,<<"en-us,en;q=0.5">>}, {<<"Connection">>,<<"keep-alive">>}, {<<"Host">>,<<"127.0.0.1:5984">>}, {<<"Keep-Alive">>,<<"115">>}, {<<"User-Agent">>, <<"Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3">>}]}}, {<<"body">>,undefined}, {<<"peer">>,<<"127.0.0.1">>}, {<<"form">>,{[]}}, {<<"cookie">>,{[]}}, {<<"userCtx">>, {[{<<"db">>,<<"transfer_central">>}, {<<"name">>,null}, {<<"roles">>,[]}]}}]}}, infinity]}}" * reason: "{gen_server,call, [<0.109.0>, {execute,{[{<<"info">>, {[{db_name,<<"transfer_central">>}, {doc_count,39441}, {doc_del_count,0}, {update_seq,56508}, {purge_seq,0}, {compact_running,false}, {disk_size,43593828}, {instance_start_time,<<"1272560477320483">>}, {disk_format_version,5}]}}, {<<"id">>,null}, {<<"method">>,'GET'}, {<<"path">>,[<<"transfer_central">>,<<"_test">>]}, {<<"query">>,{[]}}, {<<"headers">>, {[{<<"Accept">>, <<"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8,application/json">>}, {<<"Accept-Charset">>, <<"ISO-8859-1,utf-8;q=0.7,*;q=0.7">>}, {<<"Accept-Encoding">>,<<"gzip,deflate">>}, {<<"Accept-Language">>,<<"en-us,en;q=0.5">>}, {<<"Connection">>,<<"keep-alive">>}, {<<"Host">>,<<"127.0.0.1:5984">>}, {<<"Keep-Alive">>,<<"115">>}, {<<"User-Agent">>, <<"Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3">>}]}}, {<<"body">>,undefined}, {<<"peer">>,<<"127.0.0.1">>}, {<<"form">>,{[]}}, {<<"cookie">>,{[]}}, {<<"userCtx">>, {[{<<"db">>,<<"transfer_central">>}, {<<"name">>,null}, {<<"roles">>,[]}]}}]}}, infinity]}" }

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• Anti-Forgery Request Recipes For ASP.NET MVC And AJAX

  - by Dixin

  Background To secure websites from cross-site request forgery (CSRF, or XSRF) attack, ASP.NET MVC provides an excellent mechanism: The server prints tokens to cookie and inside the form; When the form is submitted to server, token in cookie and token inside the form are sent in the HTTP request; Server validates the tokens. To print tokens to browser, just invoke HtmlHelper.AntiForgeryToken():<% using (Html.BeginForm()) { %> <%: this.Html.AntiForgeryToken(Constants.AntiForgeryTokenSalt)%> <%-- Other fields. --%> <input type="submit" value="Submit" /> <% } %> This invocation generates a token then writes inside the form:<form action="..." method="post"> <input name="__RequestVerificationToken" type="hidden" value="J56khgCvbE3bVcsCSZkNVuH9Cclm9SSIT/ywruFsXEgmV8CL2eW5C/gGsQUf/YuP" /> <!-- Other fields. --> <input type="submit" value="Submit" /> </form> and also writes into the cookie: __RequestVerificationToken_Lw__= J56khgCvbE3bVcsCSZkNVuH9Cclm9SSIT/ywruFsXEgmV8CL2eW5C/gGsQUf/YuP When the above form is submitted, they are both sent to server. In the server side, [ValidateAntiForgeryToken] attribute is used to specify the controllers or actions to validate them:[HttpPost] [ValidateAntiForgeryToken(Salt = Constants.AntiForgeryTokenSalt)] public ActionResult Action(/* ... */) { // ... } This is very productive for form scenarios. But recently, when resolving security vulnerabilities for Web products, some problems are encountered. Specify validation on controller (not on each action) The server side problem is, It is expected to declare [ValidateAntiForgeryToken] on controller, but actually it has be to declared on each POST actions. Because POST actions are usually much more then controllers, the work would be a little crazy. Problem Usually a controller contains actions for HTTP GET and actions for HTTP POST requests, and usually validations are expected for HTTP POST requests. So, if the [ValidateAntiForgeryToken] is declared on the controller, the HTTP GET requests become invalid:[ValidateAntiForgeryToken(Salt = Constants.AntiForgeryTokenSalt)] public class SomeController : Controller // One [ValidateAntiForgeryToken] attribute. { [HttpGet] public ActionResult Index() // Index() cannot work. { // ... } [HttpPost] public ActionResult PostAction1(/* ... */) { // ... } [HttpPost] public ActionResult PostAction2(/* ... */) { // ... } // ... } If browser sends an HTTP GET request by clicking a link: http://Site/Some/Index, validation definitely fails, because no token is provided. So the result is, [ValidateAntiForgeryToken] attribute must be distributed to each POST action:public class SomeController : Controller // Many [ValidateAntiForgeryToken] attributes. { [HttpGet] public ActionResult Index() // Works. { // ... } [HttpPost] [ValidateAntiForgeryToken(Salt = Constants.AntiForgeryTokenSalt)] public ActionResult PostAction1(/* ... */) { // ... } [HttpPost] [ValidateAntiForgeryToken(Salt = Constants.AntiForgeryTokenSalt)] public ActionResult PostAction2(/* ... */) { // ... } // ... } This is a little bit crazy, because one application can have a lot of POST actions. Solution To avoid a large number of [ValidateAntiForgeryToken] attributes (one for each POST action), the following ValidateAntiForgeryTokenWrapperAttribute wrapper class can be helpful, where HTTP verbs can be specified:[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = true)] public class ValidateAntiForgeryTokenWrapperAttribute : FilterAttribute, IAuthorizationFilter { private readonly ValidateAntiForgeryTokenAttribute _validator; private readonly AcceptVerbsAttribute _verbs; public ValidateAntiForgeryTokenWrapperAttribute(HttpVerbs verbs) : this(verbs, null) { } public ValidateAntiForgeryTokenWrapperAttribute(HttpVerbs verbs, string salt) { this._verbs = new AcceptVerbsAttribute(verbs); this._validator = new ValidateAntiForgeryTokenAttribute() { Salt = salt }; } public void OnAuthorization(AuthorizationContext filterContext) { string httpMethodOverride = filterContext.HttpContext.Request.GetHttpMethodOverride(); if (this._verbs.Verbs.Contains(httpMethodOverride, StringComparer.OrdinalIgnoreCase)) { this._validator.OnAuthorization(filterContext); } } } When this attribute is declared on controller, only HTTP requests with the specified verbs are validated:[ValidateAntiForgeryTokenWrapper(HttpVerbs.Post, Constants.AntiForgeryTokenSalt)] public class SomeController : Controller { // GET actions are not affected. // Only HTTP POST requests are validated. } Now one single attribute on controller turns on validation for all POST actions. Maybe it would be nice if HTTP verbs can be specified on the built-in [ValidateAntiForgeryToken] attribute, which is easy to implemented. Specify Non-constant salt in runtime By default, the salt should be a compile time constant, so it can be used for the [ValidateAntiForgeryToken] or [ValidateAntiForgeryTokenWrapper] attribute. Problem One Web product might be sold to many clients. If a constant salt is evaluated in compile time, after the product is built and deployed to many clients, they all have the same salt. Of course, clients do not like this. Even some clients might want to specify a custom salt in configuration. In these scenarios, salt is required to be a runtime value. Solution In the above [ValidateAntiForgeryToken] and [ValidateAntiForgeryTokenWrapper] attribute, the salt is passed through constructor. So one solution is to remove this parameter:public class ValidateAntiForgeryTokenWrapperAttribute : FilterAttribute, IAuthorizationFilter { public ValidateAntiForgeryTokenWrapperAttribute(HttpVerbs verbs) { this._verbs = new AcceptVerbsAttribute(verbs); this._validator = new ValidateAntiForgeryTokenAttribute() { Salt = AntiForgeryToken.Value }; } // Other members. } But here the injected dependency becomes a hard dependency. So the other solution is moving validation code into controller to work around the limitation of attributes:public abstract class AntiForgeryControllerBase : Controller { private readonly ValidateAntiForgeryTokenAttribute _validator; private readonly AcceptVerbsAttribute _verbs; protected AntiForgeryControllerBase(HttpVerbs verbs, string salt) { this._verbs = new AcceptVerbsAttribute(verbs); this._validator = new ValidateAntiForgeryTokenAttribute() { Salt = salt }; } protected override void OnAuthorization(AuthorizationContext filterContext) { base.OnAuthorization(filterContext); string httpMethodOverride = filterContext.HttpContext.Request.GetHttpMethodOverride(); if (this._verbs.Verbs.Contains(httpMethodOverride, StringComparer.OrdinalIgnoreCase)) { this._validator.OnAuthorization(filterContext); } } } Then make controller classes inheriting from this AntiForgeryControllerBase class. Now the salt is no long required to be a compile time constant. Submit token via AJAX For browser side, once server side turns on anti-forgery validation for HTTP POST, all AJAX POST requests will fail by default. Problem In AJAX scenarios, the HTTP POST request is not sent by form. Take jQuery as an example:$.post(url, { productName: "Tofu", categoryId: 1 // Token is not posted. }, callback); This kind of AJAX POST requests will always be invalid, because server side code cannot see the token in the posted data. Solution Basically, the tokens must be printed to browser then sent back to server. So first of all, HtmlHelper.AntiForgeryToken() need to be called somewhere. Now the browser has token in both HTML and cookie. Then jQuery must find the printed token in the HTML, and append token to the data before sending:$.post(url, { productName: "Tofu", categoryId: 1, __RequestVerificationToken: getToken() // Token is posted. }, callback); To be reusable, this can be encapsulated into a tiny jQuery plugin:/// <reference path="jquery-1.4.2.js" /> (function ($) { $.getAntiForgeryToken = function (tokenWindow, appPath) { // HtmlHelper.AntiForgeryToken() must be invoked to print the token. tokenWindow = tokenWindow && typeof tokenWindow === typeof window ? tokenWindow : window; appPath = appPath && typeof appPath === "string" ? "_" + appPath.toString() : ""; // The name attribute is either __RequestVerificationToken, // or __RequestVerificationToken_{appPath}. tokenName = "__RequestVerificationToken" + appPath; // Finds the <input type="hidden" name={tokenName} value="..." /> from the specified. // var inputElements = $("input[type='hidden'][name='__RequestVerificationToken" + appPath + "']"); var inputElements = tokenWindow.document.getElementsByTagName("input"); for (var i = 0; i < inputElements.length; i++) { var inputElement = inputElements[i]; if (inputElement.type === "hidden" && inputElement.name === tokenName) { return { name: tokenName, value: inputElement.value }; } } return null; }; $.appendAntiForgeryToken = function (data, token) { // Converts data if not already a string. if (data && typeof data !== "string") { data = $.param(data); } // Gets token from current window by default. token = token ? token : $.getAntiForgeryToken(); // $.getAntiForgeryToken(window). data = data ? data + "&" : ""; // If token exists, appends {token.name}={token.value} to data. return token ? data + encodeURIComponent(token.name) + "=" + encodeURIComponent(token.value) : data; }; // Wraps $.post(url, data, callback, type). $.postAntiForgery = function (url, data, callback, type) { return $.post(url, $.appendAntiForgeryToken(data), callback, type); }; // Wraps $.ajax(settings). $.ajaxAntiForgery = function (settings) { settings.data = $.appendAntiForgeryToken(settings.data); return $.ajax(settings); }; })(jQuery); In most of the scenarios, it is Ok to just replace $.post() invocation with $.postAntiForgery(), and replace $.ajax() with $.ajaxAntiForgery():$.postAntiForgery(url, { productName: "Tofu", categoryId: 1 }, callback); // Token is posted. There might be some scenarios of custom token, where $.appendAntiForgeryToken() is useful:data = $.appendAntiForgeryToken(data, token); // Token is already in data. No need to invoke $.postAntiForgery(). $.post(url, data, callback); And there are scenarios that the token is not in the current window. For example, an HTTP POST request can be sent by an iframe, while the token is in the parent window. Here, token's container window can be specified for $.getAntiForgeryToken():data = $.appendAntiForgeryToken(data, $.getAntiForgeryToken(window.parent)); // Token is already in data. No need to invoke $.postAntiForgery(). $.post(url, data, callback); If you have better solution, please do tell me.

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• apt-get update getting 404 on debian lenny

  - by JoelFan

  Here is my /etc/apt/sources.list ###### Debian Main Repos deb http://ftp.us.debian.org/debian/ lenny main contrib non-free ###### Debian Update Repos deb http://security.debian.org/ lenny/updates main contrib non-free deb http://ftp.us.debian.org/debian/ lenny-proposed-updates main contrib non-free When I do: # apt-get update I'm getting some good lines, then: Err http://ftp.us.debian.org lenny/contrib Packages 404 Not Found [IP: 35.9.37.225 80] Err http://ftp.us.debian.org lenny/non-free Packages 404 Not Found [IP: 35.9.37.225 80] Err http://ftp.us.debian.org lenny-proposed-updates/main Packages 404 Not Found [IP: 35.9.37.225 80] Err http://ftp.us.debian.org lenny-proposed-updates/contrib Packages 404 Not Found [IP: 35.9.37.225 80] Err http://ftp.us.debian.org lenny-proposed-updates/non-free Packages 404 Not Found [IP: 35.9.37.225 80] Err http://ftp.us.debian.org lenny/main Packages 404 Not Found [IP: 35.9.37.225 80] W: Failed to fetch http://security.debian.org/dists/lenny/updates/main/binary-i386/Packages 404 Not Found [IP: 149.20.20.6 80] W: Failed to fetch http://security.debian.org/dists/lenny/updates/contrib/binary-i386/Packages 404 Not Found [IP: 149.20.20.6 80] W: Failed to fetch http://security.debian.org/dists/lenny/updates/non-free/binary-i386/Packages 404 Not Found [IP: 149.20.20.6 80] W: Failed to fetch http://ftp.us.debian.org/debian/dists/lenny/contrib/binary-i386/Packages 404 Not Found [IP: 35.9.37.225 80] W: Failed to fetch http://ftp.us.debian.org/debian/dists/lenny/non-free/binary-i386/Packages 404 Not Found [IP: 35.9.37.225 80] W: Failed to fetch http://ftp.us.debian.org/debian/dists/lenny-proposed-updates/main/binary-i386/Packages 404 Not Found [IP: 35.9.37.225 80] W: Failed to fetch http://ftp.us.debian.org/debian/dists/lenny-proposed-updates/contrib/binary-i386/Packages 404 Not Found [IP: 35.9.37.225 80] W: Failed to fetch http://ftp.us.debian.org/debian/dists/lenny-proposed-updates/non-free/binary-i386/Packages 404 Not Found [IP: 35.9.37.225 80] W: Failed to fetch http://ftp.us.debian.org/debian/dists/lenny/main/binary-i386/Packages 404 Not Found [IP: 35.9.37.225 80] E: Some index files failed to download, they have been ignored, or old ones used instead. Now what?

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• What is the best practice with KML files when adding geositemap?

  - by Floran

  Im not sure how to deal with kml files. Now important particularly in reference to the Google Venice update. My site basically is a guide of many company listings (sort of Yellow Pages). I want each company listing to have a geolocation associated with it. Which of the options I present below is the way to go? OPTION 1: all locations in a single KML file with a reference to that KML file from a geositemap.xml MYGEOSITEMAP.xml <?xml version="1.0" encoding="UTF-8"?> <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:geo="http://www.google.com/geo/schemas/sitemap/1.0"> <url><loc>http://www.mysite.com/locations.kml</loc> <geo:geo> <geo:format>kml</geo:format></geo:geo></url> </urlset> ALLLOCATIONS.kml <kml xmlns="http://www.opengis.net/kml/2.2" xmlns:atom="http://www.w3.org/2005/Atom"> <Document> <name>MyCompany</name> <atom:author> <atom:name>MyCompany</atom:name> </atom:author> <atom:link href="http://www.mysite.com/locations/3454/MyCompany" rel="related" /> <Placemark> <name>MyCompany, Kalverstraat 26 Amsterdam 1000AG</name> <description><![CDATA[<address><a href="http://www.mysite.com/locations/3454/MyCompany">MyCompany</a><br />Address: Kalverstraat 26, Amsterdam 1000AG <br />Phone: 0646598787</address><p>hello there, im MyCompany</p>]]> </description><Point><coordinates>5.420686499999965,51.6298808,0</coordinates> </Point> </Placemark> </Document> </kml> <kml xmlns="http://www.opengis.net/kml/2.2" xmlns:atom="http://www.w3.org/2005/Atom"> <Document> <name>MyCompany</name><atom:author><atom:name>MyCompany</atom:name></atom:author><atom:link href="http://www.mysite.com/locations/22/companyX" rel="related" /><Placemark><name>MyCompany, Rosestreet 45 Amsterdam 1001XF </name><description><![CDATA[<address><a href="http://www.mysite.com/locations/22/companyX">companyX</a><br />Address: Rosestreet 45, Amsterdam 1001XF <br />Phone: 0642195493</address><p>some text about companyX</p>]]></description><Point><coordinates>5.520686499889632,51.6197705,0</coordinates></Point></Placemark> </Document> </kml> OPTION 2: a separate KML file for each location and a reference to each KML file from a geositemap.xml (kml files placed in a \kmlfiles folder) MYGEOSITEMAP.xml <?xml version="1.0" encoding="UTF-8"?> <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:geo="http://www.google.com/geo/schemas/sitemap/1.0"> <url><loc>http://www.mysite.com/kmlfiles/3454_MyCompany.kml</loc> <geo:geo> <geo:format>kml</geo:format></geo:geo></url> <url><loc>http://www.mysite.com/kmlfiles/22_companyX.kml</loc> <geo:geo> <geo:format>kml</geo:format></geo:geo></url> </urlset> *3454_MyCompany.kml* <kml xmlns="http://www.opengis.net/kml/2.2" xmlns:atom="http://www.w3.org/2005/Atom"> <Document><name>MyCompany</name><atom:author><atom:name>MyCompany</atom:name></atom:author><atom:link href="http://www.mysite.com/locations/3454/MyCompany" rel="related" /><Placemark><name>MyCompany, Kalverstraat 26 Amsterdam 1000AG</name><description><![CDATA[<address><a href="http://www.mysite.com/locations/3454/MyCompany">MyCompany</a><br />Address: Kalverstraat 26, Amsterdam 1000AG <br />Phone: 0646598787</address><p>hello there, im MyCompany</p>]]></description><Point><coordinates>5.420686499999965,51.6298808,0</coordinates></Point></Placemark> </Document> </kml> *22_companyX.kml* <kml xmlns="http://www.opengis.net/kml/2.2" xmlns:atom="http://www.w3.org/2005/Atom"> <Document><name>companyX</name><atom:author><atom:name>companyX</atom:name></atom:author><atom:link href="http://www.mysite.com/locations/22/companyX" rel="related" /><Placemark><name>companyX, Rosestreet 45 Amsterdam 1001XF </name><description><![CDATA[<address><a href="http://www.mysite.com/locations/22/companyX">companyX</a><br />Address: Rosestreet 45, Amsterdam 1001XF <br />Phone: 0642195493</address><p>some text about companyX</p>]]></description><Point><coordinates>5.520686499889632,51.6197705,0</coordinates></Point></Placemark> </Document> </kml> OPTION 3?

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• How to setup SyntaxHighlighter with GeeksWithBlogs in about 10 minutes.

  - by mbcrump

  SyntaxHighlighter is a fully functional self-contained code syntax highlighter developed in JavaScript. Below is a sample of what it looks like in your blog. class Test { static void Main() { System.Console.WriteLine("Sample SyntaxHighlighter"); } } This tutorial will help you setup SyntaxHighlighter with GeeksWithBlogs.net in about 10 minutes. Even though this guide is specifically for GWB, you can use it on any other hosting provider that does not allow you to upload custom CSS/JavaScript. It is recommended that if you are using LiveWriter to go ahead and download Code Snippet with SyntaxHighlighter Support to integrate this functionality within Live Writer. 1) Log into GWB and select Options->Configure Now under the Custom CSS insert the following code at the top of the textbox: @import url("http://alexgorbatchev.com/pub/sh/current/styles/shCore.css"); @import url("http://alexgorbatchev.com/pub/sh/current/styles/shThemeDefault.css"); Please note that you can change the default theme by changing the shThemeDefault.css to one listed below: shThemeDefault.css shThemeDjango.css shThemeEmacs.css shThemeFadeToGrey.css shThemeMidnight.css shThemeRDark.css 2) Under the Static News/Announcements insert the following code at the top: <script type="text/javascript" src="http://alexgorbatchev.com/pub/sh/current/scripts/shCore.js"></script> <script type="text/javascript" language="javascript" src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushCSharp.js"></script> <script type="text/javascript" language="javascript" src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushJScript.js"></script> <script src='http://alexgorbatchev.com/pub/sh/current/scripts/shBrushJava.js' type='text/javascript'></script> <script language='javascript'> SyntaxHighlighter.config.bloggerMode = true; SyntaxHighlighter.config.clipboardSwf = 'http://alexgorbatchev.com/pub/sh/current/scripts/clipboard.swf'; SyntaxHighlighter.all(); </script> Please note that this will only give you support for Java, JavaScript and C Sharp. If you want more languages like Ruby and SQL. Then add the proper tags listed below. The reason that I didn’t add them is because I do not want to load languages that I will not be blogging about. <link href='http://alexgorbatchev.com/pub/sh/current/styles/shCore.css' rel='stylesheet' type='text/css'/> <link href='http://alexgorbatchev.com/pub/sh/current/styles/shThemeDefault.css' rel='stylesheet' type='text/css'/> <script src='http://alexgorbatchev.com/pub/sh/current/scripts/shCore.js' type='text/javascript'></script> <script src='http://alexgorbatchev.com/pub/sh/current/scripts/shBrushCpp.js' type='text/javascript'></script> <script src='http://alexgorbatchev.com/pub/sh/current/scripts/shBrushCSharp.js' type='text/javascript'></script> <script src='http://alexgorbatchev.com/pub/sh/current/scripts/shBrushCss.js' type='text/javascript'></script> <script src='http://alexgorbatchev.com/pub/sh/current/scripts/shBrushJava.js' type='text/javascript'></script> <script src='http://alexgorbatchev.com/pub/sh/current/scripts/shBrushJScript.js' type='text/javascript'></script> <script src='http://alexgorbatchev.com/pub/sh/current/scripts/shBrushPhp.js' type='text/javascript'></script> <script src='http://alexgorbatchev.com/pub/sh/current/scripts/shBrushPython.js' type='text/javascript'></script> <script src='http://alexgorbatchev.com/pub/sh/current/scripts/shBrushRuby.js' type='text/javascript'></script> <script src='http://alexgorbatchev.com/pub/sh/current/scripts/shBrushSql.js' type='text/javascript'></script> <script src='http://alexgorbatchev.com/pub/sh/current/scripts/shBrushVb.js' type='text/javascript'></script> <script src='http://alexgorbatchev.com/pub/sh/current/scripts/shBrushXml.js' type='text/javascript'></script> <script src='http://alexgorbatchev.com/pub/sh/current/scripts/shBrushPerl.js' type='text/javascript'></script> <script language='javascript'> SyntaxHighlighter.config.bloggerMode = true; SyntaxHighlighter.config.clipboardSwf = 'http://alexgorbatchev.com/pub/sh/current/scripts/clipboard.swf'; SyntaxHighlighter.all(); </script> 3) Now install Code Snippet with SyntaxHighlighter Support and launch Windows Live Writer. Click on the PreCode Snippet plugin add copy/paste your code into the windows. Make sure you select “PRE” and the Language that you are using. It should look similar to the following screenshot.  After you finish editing the post, hit publish and your code should look nice and neat like the example shown earlier.

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• C# Request not timing out

  - by Joel Kennedy

  I have this code which runs in a BackgroundWorker, and should make a POST request to the server and get a response. It works fine when it is supposed to work, but when I try to induce a 404 error it doesn't catch the error reporting system. loginProcess.DoWork += delegate(object s, DoWorkEventArgs args) { // loginProcess BackgroundWorker try { // Try to login, if error, report loginProcess.ReportProgress(10); String method = "POST"; String postdata = "postdata=test"; String url = "http://localhost/dev/login.php"; loginProcess.ReportProgress(15); WebRequest rqst = HttpWebRequest.Create(url); rqst.Timeout = 5000; ((HttpWebRequest)rqst).KeepAlive = true; loginProcess.ReportProgress(20); //rqst.Timeout = this.Timeout; // only needed, if you use HTTP AUTH //CredentialCache creds = new CredentialCache(); //creds.Add(new Uri(url), "Basic", new NetworkCredential(this.Uname, this.Pwd)); //rqst.Credentials = creds; rqst.Method = method; if (!String.IsNullOrEmpty(postdata)) { //rqst.ContentType = "application/xml"; rqst.ContentType = "application/x-www-form-urlencoded"; loginProcess.ReportProgress(30); byte[] byteData = UTF8Encoding.UTF8.GetBytes(postdata); loginProcess.ReportProgress(40); rqst.ContentLength = byteData.Length; loginProcess.ReportProgress(50); using (Stream postStream = rqst.GetRequestStream()) { loginProcess.ReportProgress(50); postStream.Write(byteData, 0, byteData.Length); loginProcess.ReportProgress(60); postStream.Close(); loginProcess.ReportProgress(70); rqst.GetResponse().Close(); rqst.GetRequestStream().Close(); } } loginProcess.ReportProgress(90); using (var response1 = rqst.GetResponse()) { using (var responseStream1 = response1.GetResponseStream()) { using (var reader1 = new StreamReader(responseStream1)) { //StreamReader rsps = new StreamReader(rqst.GetResponse().GetResponseStream()); string strRsps = reader1.ReadToEnd(); loginProcess.ReportProgress(95); loginVars = strRsps; //rqst. //reader1.Close(); //rsps.Dispose(); } args.Result = "SUCCESS"; } } } catch(WebException err) { // Catch error and put into err variable if(err.Status == WebExceptionStatus.ProtocolError) { // If something is wrong with protocol LoginReporting.ErrorName = Convert.ToString(((HttpWebResponse)err.Response).StatusCode); LoginReporting.ErrorDescription = Convert.ToString(((HttpWebResponse)err.Response).StatusDescription); LoginReporting.ErrorNotes = "Error when logging in, Server returned: " + Convert.ToString(((HttpWebResponse)err.Response).StatusCode); LoginReporting.ErrorLocation = "LoginRequest.ProtocolError"; args.Result = "ERROR"; //MessageBox.Show(Convert.ToString(((HttpWebResponse)err.Response).StatusCode)); //MessageBox.Show(Convert.ToString(((HttpWebResponse)err.Response).StatusDescription)); } else { args.Result = "ERROR"; } } catch(Exception err) { // Catch unhandled error LoginReporting.ErrorName = Convert.ToString(err); LoginReporting.ErrorDescription = Convert.ToString(err.Message); LoginReporting.ErrorNotes = "Error when logging in, Server returned: " + Convert.ToString(err.Message); LoginReporting.ErrorLocation = "LoginRequest.ProtocolError"; args.Result = "ERROR"; } }; I have put a timeout on the request but it just doesn't work! Is this a bug, or am I doing something wrong here? Thanks

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• Failed to load resource: the server responded with a status of 406 (Not Acceptable)

  - by skip

  I am trying to send json data and get back json data as well. I've <annotation-driven /> configured in my servlet-context.xml and I am using Spring framework version 3.1.0.RELEASE. When I send the request the browser tells me that it is not happy with the data returned from the server and gives me 406 error. And when I see the response from the server I see the whole 406 page returned by tomcat 6 server. I have got following in my pom for Jackson/Jackson processor: <!-- Jackson --> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-core-asl</artifactId> <version>1.9.4</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.4</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-xc</artifactId> <version>1.9.4</version> </dependency> <!-- Jackson JSON Processor --> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.8.1</version> </dependency> Following is the jquery code I am using to send the json request: $(function(){$(".sutmit-button").click(function(){ var dataString=$("#app-form").serialize(); $.ajax({ type:"POST", url:"apply.json", data:dataString, success:function(data, textStatus, jqXHR){ console.log(jqXHR.status); console.log(data); $('.postcontent').html("<div id='message'></div>"); $('#message').html("<h3>Request Submitted</h3>").append("<p>Thank you for submiting your request.</p>").hide().fadeIn(1500,function(){$('#message');}); }, error:function(jqXHR, textStatus, errorThrown) { console.log(jqXHR.status); $('.postcontent').html("<div id='message'></div>"); $('#message').html("<h3>Request failed.</h3>").hide().fadeIn(1500,function(){$('#message');}); }, dataType: "json" }); return false;});}); Following is the Controller that is handling the request: @RequestMapping(method = RequestMethod.POST, value="apply", headers="Accept=application/json") public @ResponseBody Application processFranchiseeApplicationForm(HttpServletRequest request) { //... Application application = new Application(...); //... logger.debug(application); return application; } I am not able to figure out the reason why I might be getting this error. Could someone help me understand why am I getting the given error? Thanks.

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• Do WebSockets have exclusive access to their sockets?

  - by Aoriste

  I'm curious to know if, after a WebSocket has been established (after having received the proper handshake from a server that supports them), whether or not the TCP socket used by the "WebSocket connection" is used exclusively by the WebSocket, or if the browser may still make regular HTTP requests with it. It only makes sense to me that WebSockets would have exclusive use of their TCP sockets, but I don't remember having read in any of the documentation that such is the case.

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• Detecting REFERRER 301 redirects in AwStats

  - by Riccardo

  About six months ago, I have moved a website to a new domain, and helped migration using 301 redirects into .htaccess of the old domain. This morning I was looking at AwStats log of the new domain, and was surpised to notice that in the "HTTP Status codes"section, 301 redirects score 77% of the whole codes (seems 200 are not tracked here). So, what is the proper meaning of the 301 code in those stats? Does it mean that 77% of traffic is incoming (referrer) from 301 redirects or?

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• Can URIs have non-ASCII characters?

  - by Cheeso

  I tried to find this in the relevant RFC, IETF RFC 3986, but couldn't figure it. Do URIs for HTTP allow Unicode, or non-ASCII of any kind? Can you please cite the section and the RFC that supports your answer. NB: For those who might think this is not programming related - it is. It's related to an ISAPI filter I'm building.

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• Mochiweb's Scalability Features

  - by ErJab

  From all the articles I've read so far about Mochiweb, I've heard this over and over again that Mochiweb provides very good scalability. My question is, how exactly does Mochiweb get its scalability property? Is it from Erlang's inherent scalability properties or does Mochiweb have any additional code that explicitly enables it to scale well? Put another way, if I were to write a simple HTTP server in Erlang myself, with a simple 'loop' (recursive function) to handle requests, would it have the same level scalability as a simple web server built using the Mochiweb framework?

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• How to expand URLs in C#?

  - by Hao Wooi Lim

  If I have a URL like http://popurls.com/go/msn.com/l4eba1e6a0ffbd9fc915948434423a7d5, how do I expand it back to the original URL programmatically? Obviously I could use an API like expandurl.com but that will limits me to 100 requests per hour.

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• Why is file_get_contents() faster than using fsock_open()?

  - by eds

  In PHP, sometimes I want to send an HTTP request to a remote site just to look at the response headers, so I declare it all manually and use the fsock_open() function. However, this goes much slower than calling file_get_contents() with a remote URL (which loads the whole page content). Why is this? Is there a good alternative way to get just the response headers (to check if a page returns a 404 error, for example) that works as fast as file_get_contents()?

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• How to configure maximum number of transport channels in WCF using basicHttpBinding?

  - by Hemant

  Consider following code which is essentially a WCF host: [ServiceContract (Namespace = "http://www.mightycalc.com")] interface ICalculator { [OperationContract] int Add (int aNum1, int aNum2); } [ServiceBehavior (InstanceContextMode = InstanceContextMode.PerCall)] class Calculator: ICalculator { public int Add (int aNum1, int aNum2) { Thread.Sleep (2000); //Simulate a lengthy operation return aNum1 + aNum2; } } class Program { static void Main (string[] args) { try { using (var serviceHost = new ServiceHost (typeof (Calculator))) { var httpBinding = new BasicHttpBinding (BasicHttpSecurityMode.None); serviceHost.AddServiceEndpoint (typeof (ICalculator), httpBinding, "http://172.16.9.191:2221/calc"); serviceHost.Open (); Console.WriteLine ("Service is running. ENJOY!!!"); Console.WriteLine ("Type 'stop' and hit enter to stop the service."); Console.ReadLine (); if (serviceHost.State == CommunicationState.Opened) serviceHost.Close (); } } catch (Exception e) { Console.WriteLine (e); Console.ReadLine (); } } } Also the WCF client program is: class Program { static int COUNT = 0; static Timer timer = null; static void Main (string[] args) { var threads = new Thread[10]; for (int i = 0; i < threads.Length; i++) { threads[i] = new Thread (Calculate); threads[i].Start (null); } timer = new Timer (o => Console.WriteLine ("Count: {0}", COUNT), null, 1000, 1000); Console.ReadLine (); timer.Dispose (); } static void Calculate (object state) { var c = new CalculatorClient ("BasicHttpBinding_ICalculator"); c.Open (); while (true) { try { var sum = c.Add (2, 3); Interlocked.Increment (ref COUNT); } catch (Exception ex) { Console.WriteLine ("Error on thread {0}: {1}", Thread.CurrentThread.Name, ex.GetType ()); break; } } c.Close (); } } Basically, I am creating 10 proxy clients and then repeatedly calling Add service method. Now if I run both applications and observe opened TCP connections using netstat, I find that: If both client and server are running on same machine, number of tcp connections are equal to number of proxy objects. It means all requests are being served in parallel. Which is good. If I run server on a separate machine, I observed that maximum 2 TCP connections are opened regardless of the number of proxy objects I create. Only 2 requests run in parallel. It hurts the processing speed badly. If I switch to net.tcp binding, everything works fine (a separate TCP connection for each proxy object even if they are running on different machines). I am very confused and unable to make the basicHttpBinding use more TCP connections. I know it is a long question, but please help!

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• SMS GateWay in USA

  - by Punit

  Can somebody tell me best SMS gateway in USA . I want my application to send SMS using HTTP. So I would like to the best and cheap gateway which can provide api's to send sms. My App is written in VB.NET.

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• Is it ethical to let users see the request headers from visitors to a url shortening service?

  - by soniiic

  I'm currently in the progress of making a url shortening service that will let the creator see the http request headers that the browser has made when visitors visit the url. The visitors won't be made aware that they are being tracked, but obviously nothing is personally identifiable. Is there anything I should be made aware of ethically or legally that makes this a bad idea?

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• What does the question mark at then end of a css include url do?

  - by Bob Dylan

  I've noticed that on some websites (including SO) the link to the CSS will look like: <link rel="stylesheet" href="http://sstatic.net/so/all.css?v=6638"> I would say its safe to assume that ?v=6638 tells the browser to load version 6638 of the css file. But can I do this on my websites and can I include different versions of my CSS file just by changing the numbers?

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• flex - SWFLoader - authentication

  - by Hamish

  I have an issue where I am trying to load an external SWF using a SWFLoader, but the HTTP server requires authentication. <mx:SWFLoader source="assets/externalswf.swf"></mx:SWFLoader> Is there any way to pass the credentials to the SWFLoader?

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• Track results of a regular expression extractor in JMeter

  - by Glenn Slaven

  Our server returns a custom 'X-Execution-Time' HTTP response header that returns in miliseconds the time between the server getting a request and our code returning a page, ie how long our code takes to run. I'm using JMeter to do some testing & I'd like to be able to report on this number of over time. I've setup this regular expression extractor: X-Execution-Time:\s(\d+) but I don't know how to get JMeter to report on this number per request so i can get a trend over time

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• Strange 301 redirect problem

  - by user261231

  Hi all, I'm trying to redirect all URLs that start with "/?page=" to "/stuff/?page=" I have this in my .htaccess file: RewriteEngine on RedirectMatch 301 ^/?page=/(.*)$ http://www.mysite.com/stuff/$1 But it's not working.. What am I doing wrong?

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• RESTEasy - access to web folder for geting image

  - by Trick

  I would like to allow users to access images saved in web folder. For example - I have an image in web root folder "blank.png". But the link http://localhost:8080/myapp/blank.png returns 404 (not found). Adding type to resteasy.media.type.mappings does not work. I am a bit of a newbie in RESTEasy...

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• How much network overhead does TLS add compared to a non-encrypted connection?

  - by Daniel Sterling

  (Approximately) how many more bits of data must be transferred over the network during an encrypted connection compared to an unencrypted connection? IIUC, once the TLS handshake has completed, the number of bits transferred is equal to those transferred during an unencrypted connection. Is this accurate? As a follow up, is transferring a large file over https significantly slower than transferring that file over http, given fast processors and the same (ideal) network conditions?

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• Making sure a web page is not cached, across all browsers.

  - by Edward Wilde

  Our investigations have shown us that not all browsers respect the http cache directives in a uniform manner. For security reasons we do not want certain pages in our application to cached, ever, by the web browser. This must work for at least the following browsers: Internet Explorer versions 6-8 FireFox versions 1.5 - 3.0 Safari version 3 Opera 9 Our requirement came from a security test. After logging out from our website you could press the back button and view cached pages.

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