Asp Net Error 400
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Http 400 Bad Request Fix
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Http Error 400. The Request Verb Is Invalid
ASP.Net: HTTP 400 Bad Request error when trying to process http://localhost:5957/http://yahoo.com up vote 4 down vote favorite I'm trying to create something similar to the diggbar : http://digg.com/http://cnn.com I'm using Visual Studio 2010 and Asp Development server. However, I can't get the ASP dev server to handle the request because it contains "http:" in the path. I've tried to create an HTTPModule to rewrite http error 400 - bad request the URL in the BeginRequest , but the event handler doesn't get called when the url is http://localhost:5957/http://yahoo.com. The event handler does get called if the url is http://localhost:5957/http/yahoo.com To summarize http://localhost:5957/http/yahoo.com works http://localhost:5957/http//yahoo.com does not work http://localhost:5957/http://yahoo.com does not work http://localhost:5957/http:/yahoo.com does not work Any ideas? asp.net http url-rewriting url-routing share|improve this question edited Jun 4 '09 at 15:01 Spencer Ruport 28.6k666116 asked Jun 4 '09 at 3:20 mat3 141115 6 How about marking an answer? –Scott Hanselman Apr 25 '11 at 20:20 add a comment| 12 Answers 12 active oldest votes up vote 12 down vote I've written an article with Stefan's help that explains how to do this: Experiments in Wackiness: Allowing percents, angle-brackets, and other naughty things in the ASP.NET/IIS Request URL share|improve this answer answered Jun 9 '10 at 21:56 Scott Hanselman 15.4k56586 add a comment| up vote 7 down vote From Stefan on the ASP.Net team: http://forums.asp.net/p/1431148/3221542.aspx In current versions of ASP.NET Urls containing characters like the colon character will be rejected as a potential security threat. The historical reason for this is that the underlying NTFS file system supports alterna
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always curious to know the root cause of an exception, even though they found the solution from elsewhere. So what is the reason of this exception (400 Bad Request).The answer is security. Security is an important http://weblogs.asp.net/imranbaloch/understanding-400-bad-request-exception feature for any application. ASP.NET try to his best to give you more secure application http://serverfault.com/questions/334420/how-to-fix-bad-request-response-from-iis-express-7-for-one-request-from-internet environment as possible. One important security feature is related to URLs. Because there are various ways a hacker can try to access server resource. Therefore it is important to make your application as secure as possible. Fortunately, ASP.NET provides this security by throwing an exception of Bad Request whenever he feels. In this Article I am try to present bad request when ASP.NET feels to throw this exception. You will also see some new ASP.NET 4 features which gives developers some control on this situation. Description: http.sys Restrictions: It is interesting to note that after deploying your application on windows server that runs IIS 6 or higher, the first receptionist of HTTP request is the kernel mode HTTP driver: http.sys. Therefore for completing your request successfully you need to present your validity to http.sys and 400 bad request must pass the http.sys restriction. Every http request URL must not contain any character from ASCII range of 0x00 to 0x1F, because they are not printable. These characters are invalid because these are invalid URL characters as defined in RFC 2396 of the IETF. But a question may arise that how it is possible to send unprintable character. The answer is that when you send your request from your application in binary format. Another restriction is on the size of the request. A request containg protocal, server name, headers, query string information and individual headers sent along with the request must not exceed 16KB. Also individual header should not exceed 16KB. Any individual path segment (the portion of the URL that does not include protocol, server name, and query string, for example, http://a/b/c?d=e, here the b and c are individual path) must not contain more than 260 characters. Also http.sys disallows URLs that have more than 255 path segments. If any of the above rules are not follow then you will get 400 Bad Request Exception. The reason for this restriction is due to hack attacks against web servers involve encoding the URL with different character representations. You can change the default behavior enforced by http.sys using some Registry switches present at HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\HTTP\Parameters ASP.NET Restrictions: After passing the restriction
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top How to fix Bad request response from IIS express 7 for one request from internet up vote 0 down vote favorite I'm trying IISExpress 7 in Windows XP to servr requests from internet for ASP .NET MVC2 applicaton I changed line in iisexpress 7 applicationhost.config from