i know how to implement this thing..
but i have few question like..
wot is the major purpose of using HttpHandler & HttpModules..
and how they work with page life cycle..?did they get executed b4 page life cycle..?where i got more control and more power
in order to utilize HttpHandler & HttpModules..
When exactly to use HttpHandlers and HttpModules?Can't I write that code in ASPX pages' code behind?
View 1 RepliesI have the following module
public class LowerCaseRequest : IHttpModule
{
public void Init(HttpApplication context)
{
context.BeginRequest += new EventHandler(this.OnBeginRequest);
[Code]....
It works grate on my PC running XP and IIS 5.1
but on my webserver running IIS7 and WS 2008 dosn't works.
I recently started learning about HttpModules and made my first one. I was wondering if someone could explain why some modules in the the web.config include a lot of extra info and others do not.
example: not much info
<add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah"/>
example a lot of info
<add name="UrlRoutingModule" type="System.Web.Routing.UrlRoutingModule, System.Web.Routing, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
What is a publickeytoken, version, culture. Do I need to do anything special to use those?
Suppose that both FirstModule and SecondModule handle the Application_BeginRequest event. Will it execute in the order defined in the web.config?
<httpModules>
<add type="MyApp.FirstModule, MyApp" name="FirstModule"/>
<add type="MyApp.SecondModule, MyApp" name="SecondModule"/>
<add type="OtherApp.OtherModule, OtherApp" name="OtherModule"/>
</httpModules>
Are there other ways that the order can be specified?
I'd like to clean up the web.config and remove unneeded XML.
A default ASP.NET 3.5 web application has the follow elements in the web.config:
<httpHandlers>
<remove verb="*" path="*.asmx"/>
<add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false"/>
</httpHandlers>
<httpModules>
<add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add name="UrlRoutingModule" type="System.Web.Routing.UrlRoutingModule, System.Web.Routing, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
</httpModules>
When running under IIS7, which has modules and handlers being registered under the system.webServer element, is the configuration above still needed?
I attempted to find any information in regards to best practices of handling errors inside of a HttpModule unfortunately I can't seem to find any information on Google in regards to this.
All the information I've found all pertains in how to use the global.asax or a custom http module to log errors which is completely not pertinent.
Edit: Clearly this question has been misunderstood. I am seeking information regarding software patterns that are employed to prevent a HttpModules from faulting, triggering custom errors redirection, and faulting again causing infinite exception chains until IIS shuts down the thread entirely.
This however is very nontrivial since the HttpSessionState collection can't be depended on for the life cycle of HttpModules. Since error conditions have already occurred it would be improper to expect that I could read the ASP.NET session cookie to get an identifier that I could store user specific data in the application cache. Storing data in the HttpRequest.Items collection would be pointless since that in no way exists across multiple requests.
In an ASP.NET application, I need to do some changes on every CSS file sent.So I created an HttpHandler (inside the app itself), added:
<add verb="*" path="*.css" type="MyWebsite.CssTestHandler,MyWebsite"/>
to Web.config in system.web/httpHandlers and modified the handler like this:
public void ProcessRequest(HttpContext context)
{
context.Response.Clear();
text.Response.Write("Hello World");
context.Response.End();
}
Can u explain me what ASHX HttpHandler uses for?
View 7 RepliesI have an aspx page that I want to convert to an HttpHandler, but I'm struggling withewState that's been used in the code behind of the aspx page
View 2 RepliesI have created a HttpHandler to be used with SWFUpload to upload images to the server. This upload is done in an administration backend so users need to be authenticated to upload images.Initially I made the whole administration area deny annonymous users but because of the way SWFUpload appears to work it wouldn't work correctly with Forms authentication and would return a 302 status code.I had thought it would be possible to make the location of my handler public in Web.config and use context.User.Identity.IsAuthenticated in my handler to determine if the user is logged in.
View 3 RepliesHow can I tell from within an ASP.NET HttpHandler if it is executing because of a call to Server.Execute("myHandler.ashx")or because of the user linking directly to myHandler.ashx? (Besides using a querystring parameter).
View 2 RepliesAs i know that asp.net fulfill all the requirements for any web application but what are the ground rules for creating custom httphandler and httpmodule in asp.net.Edit:For example I want to fetch image from database then what i should i use httphandler or normally read image from database.If httphandler then why?
View 4 RepliesIm trying to write a small web application for forwarding requests to my page to the new pages on my web site. First off im implementing a IHttpHandler and in the ProcessRequest method i simple want to print out the requesting page, my conde looks like this:
public class RedirectHandler : IHttpHandler
{
public bool IsReusable
{
get { return true; }
[code]...
Can a httphandler in .net return a value? If yes how?
View 2 RepliesSo I am working on a project in ASP.NET MVC 2 with C#.I have a View with a file upload but this is a flash component (.swf).The result of the file upload (the storing of the file and processing of data in the database) is done in a HTTPHandler.I would like the HTTPHandler to send information to my active controller.
Is there a way to get the controller that was used to load the view? I'm having problems finding information about it online.
How to encrypt querystring using HttpHandler?
View 1 RepliesI am trying to pass an exception to an HttpHandler by doing the following:
catch (Exception e)
{
byte[] exceptionData;
MemoryStream stream = new MemoryStream();
BinaryFormatter formatter = new BinaryFormatter(null, new StreamingContext(StreamingContextStates.Persistence));
formatter.Serialize(stream, e);
exceptionData = stream.ToArray();
WebClient client = new WebClient();
Uri handler = new Uri(ApplicationUri, "TransferException.axd");
#if DEBUG
ServicePointManager.ServerCertificateValidationCallback += new RemoteCertificateValidationCallback(BypassAllCertificateStuff);
#endif
try
{
client.UploadData(handler, exceptionData);
}
catch (WebException) { }
}
EDIT
I am getting the following exception on the client.UploadData() line.
"Content-Length or Chunked Encoding cannot be set for an operation that does not write data."
EDIT
Even if I change my call to be client.UploadString(location, "THIS IS A TEST!"); it still fails with the same exception.
I have an website in IIS 6.0 (windows 2003). Inside that I had configured another application (As IIS Application).
Now, When I uncommend a "add verb" tag in main web.config file, the webservice inside the application throws "404 file not found exception" Is there anything which I need to update in child web.config?
My HttpHandler looks like:
[Code]....
How can I cache the entire xml document that I am generating?
Or do I only have the option of caching the DataTable object?
I'm trying to fashion a solution which will simulate App_Offline.htm for remote access but still allow local users to test the website out. I found some various options that I am trying out but the best one doesn't seem to work for our ASP.NET(2.0) site which relies on session state being enabled on all of the pages.
The HttpHandler is added into web.config
<add verb="*" path="*.aspx" type="AppOffline.AppOfflineHandler, AppOffline" />
and when the class is called, it boils down to this:
public void ProcessRequest( HttpContext context )
{
this.context = context;
[code]...
<asp:Image ID="imgVerify" Width="60" Height="18" runat="server" align="absmiddle" Style="border: 1px solid #999999" ImageUrl="/Common/GetCaptcha.aspx" />
It'll also trigger Page_Load() of abc.aspx. Is this that true? And if it is, can I avoid it?
what is httphandler?what is the use ?
View 7 RepliesI'm using the RssToolkit for .net. I'm using an Httphandler to return rss feeds. The feedID is passed in as a querystring parameter. If no parameter is passed in, I would like to have the the handler return a feed that is an aggreate of some of the feeds that the handler can handle. What I'm wondering is, can the handler recurse?
View 1 RepliesProviding web features through a custom HttpHandler such as in Elmah is extremely handy for ASP.NET Web Applications, because the handler can be embedded into any ASP.NET web app. It perfectly fits as a simple way to extend an existing web app. Now, developing any significant set of features through a custom handler is a very tedious process. I am wondering if it is possible to directly embed an ASP.NET Application into another one through a custom handler (as opposed to cut and pasting the whole app in a sub directory). Here is a small list of embedded web app that would be fit for such a purpose:
Health monitoring console. Provisioning console (for cloud web app with auto-scaling). App settings management console (considering a scheme IoC-settings-stored-in-DB). Each one of those web parts could be provided as an HttpHandler; but again implementation is really tedious. Does anyone know how to do that or how to achieve an equivalent behavior?