HttpHandlers / Modules :: Custom HttpHandler Generally Fails
Jun 22, 2010
I'm trying to secure my web application so XML files it contains can't be downloaded. I thought it would be as simple as adding these to the "httpHandlers" section of web.config:
<remove verb="*" path="*.xml"/>
<add verb="*" path="*.xml" type="System.Web.HttpForbiddenHandler"/>
This failed - the XML files could still be downloaded easily. I tried different browsers in case they were caching, but everything could download the XML files without any trouble. I thought this might be due to some special handling of XML, so I tried mocking up an alternative based on ".txt123" files. I added this file with some dummy content:
[code]....
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Mar 8, 2011
We have a handler to deal with .dat files.. everything is already setup and server is acknowledging the file type and doing its thing to handle it..
But the handler requires 1 bit of information along with the HTTP request which is a physical file path.. the file name it knows based on the file we call , but how can i pass a custom header along with the request so that the handler will use that when the request is made?
Basically when on our player.aspx page, i will have a button, when you click that button a request is made to the .dat file, but along with that request i need to send the physical file path.. how can i do that?
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Mar 3, 2010
what is httphandler?what is the use ?
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Oct 19, 2010
I am using Httphandler to access my pages. Have Loginstatus Control on the master pages.
OnLoggingOut for the Loginstatus control I am doing a Session.abandon()... But My session_end
does not get called in the Gobal.asax.I tried link button and everything. but when I take out the httphandler the Session_end gets executed in global.asax
I can handle the full session end on my own but is there any way to call Session_end in global.asax?
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Aug 5, 2010
I'm looking for link/tutorials/code samples on How to create HttpHandler for generating rss feeds for a website.
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May 3, 2010
HttpHandler and POST verb?
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Nov 30, 2010
I have this HttpHandler which works great ONLY for PDF files:
=================================================================
public void ProcessRequest(HttpContext context)
{
HttpResponse response = HttpContext.Current.Response;
[code]...
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Oct 29, 2010
How do I avoid ASP.NET session timeout from a httphandler?
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Oct 29, 2010
I need to access image files (.jpg) on a server other than the web server my app runs on. I would like to use an httphandler to do this but I am unsure of the syntax to specify the path. I have tried mapping a drive on the web server to the file server but that didn't work. I have tried using a UNC path but that did not work either.
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Nov 11, 2010
i have written httphandler which will display text of a label but processrequets of httphandler event is not being fired.
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Mar 1, 2010
I am using uploadify for a photography site I am building. I have an HTTPHandler that I'm using to save the posted file. What I am wondering is if I can resize images, insert a record of the image into a db and save the image from the HTTPHandler? This is my first experience with HTTPHandlers so forgive me if there is an obivious answer for this.
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Oct 4, 2010
I have a problem with large respones and IIS7, the server runs out of memory. I've written the test code below that works pretty much like my real code... When i start to download the file i can se the memory usage rise until it hits 100% and Firefox complaints about lost connection to server, looks like IIS7 does not release cache or something.. Works in IIS6 by the way
[Code]....
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Jan 26, 2010
After adding a custom module, Module list is showing MyModule "Entry Type" as "Local".
and Entry Type of all other modules is "Inherited".
what is Entry Type and difference between "Local" and "Inherited"?
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Oct 17, 2010
This seems as good a place as any for this question. It has to do with an .ASHX handler.
I have written a generic file serving handler in asp.net/vb.net - it has been working great. I recently moved to a windows 7 box and am now debugging under IIS7, and this is where the problems occure.
Whenever I serve a file to either FireFox or Chrome (IE8 works fine) from IIS 7, the download will fail.
- In FireFox the error is "[some file name and path].part could not be saved, because the source file could not be read."
- In Chrome the error is "Error 330 (net::ERR_CONTENT_DECODING_FAILED): Unknown error."
- In IE8 it works fine
If I run the same code in IIS6, it works fine. If I run the same code in the Visual Studio virtual web server, it works fine (on windows 7 or XP).
I am rather concerned about this as our production web server will soon be IIS7; which I'm starting to really love, and would hate to revert to IIS6 just because this won't work in IIS7.
Here is the code I'm using..I've tried a number of different patterns. It seems to always fail on the Flush() line with the error "System.Web.HttpException = {"The remote host closed the connection. The error code is 0x80070040."}"
One thing I have noticed, if I move the flush statment to the finally clause or remove it all together; firefox will attempt to read the entire file - it appears to be looping through the entire block of code just fine, until it hits the flush statement. If I remove the flush statment I still get an error and it still tries to read the entire file before asking me to save it.
--Edit: I removed the flush and tested again; firfox thinks it downloaded a zero byte file.
I'm assuming I just have some sort of header issue going on here, but I'm at a loss at this point as to what that would be.
[Code]....
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Mar 4, 2011
I just bought an old domain name and am looking to redirect as many old URLs as possible to acquire backlinks intended for the original owner for pagerank reasons. The original site had a lot of static pages ending in .htm which need to be redirected to directories. I use httpcontext in my Global.asax file to initiate 301 redirects and this works great on folder names or .aspx files, but whenever I try to redirect a .htm it fails.
Sample code:
if (HttpContext.Current.Request.Url.ToString().ToLower().Contains("http://www.example.com/oldpage.htm"))
{
HttpContext.Current.Response.Status = "301 Moved Permanently";[code]....
I also tried using my Parallels H-Sphere interface provided by my hosting company to do a IIS redirect, but whenever I hit submit the page just starts an infinate loop of sending a request.
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Mar 31, 2010
I've tried to implement two different solutions that use either and HttpModule or and HttpHandler to do URLRewriting for me. These work great on IIS 7 within my local development environment in Integrated and Classic modes. Currently the production server is running IIS 6.0 on a shared hosting environment. It appears that the request at least hits both the Module and Handler as the URL above redirect to the particular friendly url, but it doesn't redirect and hit hte Module or Handler again. Instead I get a 404 error for the friendly URL.
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Jul 23, 2010
I have a very simple query. I have added custom header to my website. Now I want to read the custom header. I am using IIS 6.0 on windows XP. I have already tried using using the Request.ServerVariables and and Request.header method. But none of them give me the custom header added to website.
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Mar 15, 2011
I'm going to use aspx pages as templates for code-generator. I found two ways how to achieve it, but with both have troubles.
Test project consists of two files code.cs and test.aspx with only "Hello!" text.
[Code]....
1. GenerateA with GetDomainForGenerator failed with "This method cannot be called during the application's pre-start initialization stage."
in the out.txt and stack trace
[Code]....
2. GenerateB with copy-pasted CreateWorkerAppDomainWithHost from cassini source generates correct out.txt
But when I put smth related to my assembly in test.aspx (for ex.:<%@ Page Language="C#" %> <%@ Import Namespace="TestHost" %> Hello!)
the result is "Compilation Error" and the everything is good when import for example System.
I dislike both of listed approcahes.
The first is due to magic values in dom.SetData and the second one due to magic System.Web.Compilation.BuildManagerHost
and I don't know what is happaning in background.
So, how to create and configure AppDomain and Host?
Where can I read about background process of HttpRuntime?
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Oct 18, 2010
i have a custom handler which captures user's book mark entry. To debug this handler, i have created a file "test1.txt" in code behind which saves the user entry. After the debug, i removed the text file (test1.txt) then re-complied the web app and deployed new DLLs for the site. But, the site is still looking for test1.txt file. i dont know how to confirm if the handler is really removed from the new DLL. Also, looked at the handler code behind file and didn't find any entry with test1.txt. So,
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Mar 16, 2011
I am writing a custom HTTP module to implement user authentication and appropriate access rights. And for identifying access rights for the user also depends on identifying the client's machine details like IP address, machine name, etc. The access rights will depend based on from which location or machine the user is trying to login.
Can we get these details from the HttpApplication or HttpContext object?
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Feb 23, 2011
As im new to this concept,i request anyone to explain in detail about configuring the custom handlers in IIS 5.1 STEP by STEP and also about mapping the extension.
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Aug 10, 2010
I created an application and implemented IHTTPHandler for all incoming request ending with ".aspx" extension.Under "ProcessRequest" module, I am creating an instance of HttpContext (with URL attributes different from my application's URL i.e. if I am working on localhost then speciying Yahoo.com as its URL) and assigning it to "context" which comes as method argument.After redirection, an error is generated. Also, the custom HTTPContext is not passed to the requested page (default.aspx, in my case.)Code is as follows.
[Code]....
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Nov 28, 2010
When I have a HttpHandler class in C#/ASP.NET mapped to a file extension in IIS any file with that extension fails to download/display in web browsers (it's downloaded as a 0-byte file in some browsers and nothing at all in other browsers). After removing the application mapping for the HttpHandler in IIS so it doesn't call the IHttpHandler class in C#, the web browser downloads the file successfully.
This was tested with an IHttpHandler class in C# that has an empty ProcessRequest method.
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Jun 8, 2010
is httpmodules executed each and every time in request and response cycle ?? if Yes is it possible to disable a specific http module ??
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Feb 17, 2011
I have an application that uses an Asynchronous HttpHandler for retrieving images from a fileshare It appears the performance of this is quite poor. I have two questions:1. Does it make sense to use an IHttpAsyncHandler for this or will an IHttpHandler work fine? I have four images on a page that need to be loaded this way and it seems that they all load sequentially instead of in parallel. Since we have some JavaScript in the body onload event, it doesn't get excuted until all four images are finished loadingy bearing on this.
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