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();
}
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..
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?
I have a strange issue where i have a a HttpHandler having its ProcessRequest() event firing twice.i have nothing else in the class except a pointer to a static method so i'm lost.I have done some googling to no avail even thought it appears a few people are having similar issues:
Code:
public bool IsReusable
{
get { return true; }
[code]...
I have a set of code (noted below) in ProcessRequest(HttpContext context) in a generic handler .ashx file.
HtmlGenericControl holder = new HtmlGenericControl("div");
//Set holder's properties and customization
HtmlGenericControl button1 = new HtmlGenericControl("input");[code]....
Now as I am in a HttpHander, I want to get the HTML of holder control and write it through context.Respose.Write().
I'm still trying to follow this sample:
http://www.codeproject.com/KB/aspnet/FlashUpload.aspx
Under Visual Studio it's working fine but, when I try to publish on IIS it doesn't works. This is the situation: under my Website I created a Upload.vb class under App_Code folder that implements IHttpHandler, IRequiresSessionState.
On web.xml I wrote this rows:
<remove verb="POST,GET" path="Upload.axd"/>
<add verb="POST,GET" path="Upload.axd" type="Upload"/>
On Page.aspx I added this code:
<FlashUpload:FlashUpload ID="flashUpload" runat="server"
UploadPage="Upload.axd"
FileTypeDescription="Images" FileTypes="*.doc; *.xls; *.pdf; *.docx; *.xlsx"
UploadFileSizeLimit="0" TotalUploadSizeLimit="0" />
I followed the sample and my class has not namespace. I read on internet that this error happens when IIS is not able to find the class.
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?
I'm writing a multi-tenant app that will receive requests like http://www.tenant1.com/content/images/logo.gif and http://www.anothertenant.com/content/images/logo.gif. I want the requests to actually map to the folder location /content/tenant1/images/logo.gif and /content/anothertenant/images/logo.gif
I'm using asp.net Mvc 2 so I'm sure there's probably a way to setup a route to handle this or a custom route handler?
I have a httphandler that is fitred for all .png files. I would to be able to rewite the name of the file into the html. Is this possible? So if test.png comes into the handler I want to write test.png?V=1
So far I have found the following:
context.Response.AddHeader("content-disposition", "inline; filename=" + context.Request.FilePath + "?V=1");
