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Return an aspx page in an HttpHandler?
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This message was discovered on ASPFriends.com 'aspnghttphandlers' list.
Responses highlighted in red are from those people who are likely to be able to contribute good, authoratitive information to this discussion. They include Microsoft employees, MVP's and others who IMHO contribute well to these kinds of discussions.

David Brophy
-- Copied from [aspngfreeforall] to [aspnghttphandlers] by Charles M. Carroll <Click here to reveal e-mail address> --Hi,I want to return an aspx page to the browser in an HttpHandler. I'd like =to beable to change some stuff in my instance on the Page object before it =getsprocessed.=46or example - look at my made up code below, which illustrates what I =want todo...public class UserControlHandler : IHttpHandler{ public void ProcessRequest(HttpContext context) {=09 Page myPage =3D [LoadPageFromFile("mypage.aspx",context)];    myPage.myTitleProperty =3D "Hello, you requested: " + =context.Request.Url; [context.Response =3D myPage.Response.Output]; // or somthing } public bool IsReusable { get { return true; } }}What do you think?- David BrophyDirector, Cambro Limited,(023) 80 679550=Click here to reveal e-mail address
Reply to this message...
 
    
Mark Robson
I don't know what LoadPageFromFile is (I can't find it in the docs), but
can't you just add some parameters to the request (perhaps add a few extra
headers) and then use Server.Transfer() ?

I would be skeptical about setting the ASP.NET request up directly because
I'm not sure what order the events would need to be fired in.

Then it would operate somewhat like Struts in Java, where you have a
controller (Servlet or HttpHandler) which sets parameters up then forwards
the request (server-side) to the presentation which is handled by the script
layer (JSP or ASP.NET)?

Mark
Reply to this message...
 
    
David Brophy
On Wed, 23 Jan 2002 18:31:31 -0000, you wrote:

>I don't know what LoadPageFromFile is (I can't find it in the docs),=20

Sorry, I made that up to illustrate what I wanted to do.

[Original message clipped]

Hmmm, not really what I want to do, but I might look into that....

>I would be skeptical about setting the ASP.NET request up directly =
because
[Original message clipped]

I did a bit more investigation... It seems I can do sort of what I want =
with the
following:

public class MyFactory : IHttpHandlerFactory
{
public virtual IHttpHandler GetHandler(HttpContext context, String
requestType, String url, String pathTranslated)
{
myNamespace.myPageClass h =3D (myNamespace.myPageClass)
Activator.CreateInstance (Type.GetType("myNamespace.myPageClass"));
            =09
return (IHttpHandler)h;
}

// This is a must override method.
public virtual void ReleaseHandler(IHttpHandler handler)
{
}
}

This will display the output of a page class e.g. if I put
"Response.Write("Hello World")" in the Page_Load in the codebehind, it =
will
display it, _but_ it ignores everything in the .aspx page.

Anyone know a way to instantiate an aspx page object?

- David Brophy
Director, Cambro Limited,
(023) 80 679550=20
Click here to reveal e-mail address
Reply to this message...
 
    
David Staheli

System.Web.UI.Page _aspxPage;

// Get reference to page (modify path to path to page as needed)
_aspxPage =3D (System.Web.UI.Page)
PageParser.GetCompiledPageInstance(context_.Request.Path,
context_.Server.MapPath(context_.Request.Path), context_);

// Process requested page (if postback, the page's event handlers will
be called)
_aspxPage.ProcessRequest(context_);

-----Original Message-----
From: David Brophy [mailto:Click here to reveal e-mail address]=20
Sent: Thursday, January 24, 2002 1:33 AM
To: aspnghttphandlers
Subject: [aspnghttphandlers] RE: Return an aspx page in an HttpHandler?

On Wed, 23 Jan 2002 18:31:31 -0000, you wrote:

>I don't know what LoadPageFromFile is (I can't find it in the docs),=20

Sorry, I made that up to illustrate what I wanted to do.

[Original message clipped]

Hmmm, not really what I want to do, but I might look into that....

>I would be skeptical about setting the ASP.NET request up directly
because
[Original message clipped]

I did a bit more investigation... It seems I can do sort of what I want
with the
following:

public class MyFactory : IHttpHandlerFactory
{
public virtual IHttpHandler GetHandler(HttpContext context, String
requestType, String url, String pathTranslated)
{
myNamespace.myPageClass h =3D (myNamespace.myPageClass)
Activator.CreateInstance (Type.GetType("myNamespace.myPageClass"));
            =09
return (IHttpHandler)h;
}

// This is a must override method.
public virtual void ReleaseHandler(IHttpHandler handler)
{
}
}

This will display the output of a page class e.g. if I put
"Response.Write("Hello World")" in the Page_Load in the codebehind, it
will
display it, _but_ it ignores everything in the .aspx page.

Anyone know a way to instantiate an aspx page object?

- David Brophy
Director, Cambro Limited,
(023) 80 679550=20
Click here to reveal e-mail address

| [aspnghttphandlers] member Click here to reveal e-mail address =3D YOUR ID
| http://www.asplists.com/asplists/aspnghttphandlers.asp =3D JOIN/QUIT
| http://www.asplists.com/search =3D SEARCH Archives
Reply to this message...
 
    
Steven A Smith (VIP)
I want to create a mapping between folders in the URL and pages. That is, I
want something like this:

http://mysite.com/abc/ --> http://mysite.com/default.aspx?site=abc
http://mysite.com/def/ --> http://mysite.com/default.aspx?site=def

I'm assuming I can do this with an httphandler -- can someone give me a hint
how to start?

Thanks,
Steve
Reply to this message...
 
    
Scott
What about using the Context.RewritePath method in your global.asax file?
-Scott

-----Original Message-----
From: Steven A Smith [mailto:Click here to reveal e-mail address]
Sent: Sunday, February 17, 2002 6:25 PM
To: aspnghttphandlers
Subject: [aspnghttphandlers] RE: Return an aspx page in an HttpHandler?

I want to create a mapping between folders in the URL and pages. That is, I
want something like this:

http://mysite.com/abc/ --> http://mysite.com/default.aspx?site=abc
http://mysite.com/def/ --> http://mysite.com/default.aspx?site=def

I'm assuming I can do this with an httphandler -- can someone give me a hint
how to start?

Thanks,
Steve

| [aspnghttphandlers] member Click here to reveal e-mail address = YOUR ID
| http://www.asplists.com/asplists/aspnghttphandlers.asp = JOIN/QUIT
| http://www.asplists.com/search = SEARCH Archives
Reply to this message...
 
    
David Brophy
On Sun, 17 Feb 2002 18:25:25 -0500, you wrote:

>I want to create a mapping between folders in the URL and pages. That =
is, I
[Original message clipped]

It's difficult.=20

I tried to do this, but I think directories are handled a bit differently=
by the
isapi routines (someone correct me if I'm wrong!).=20

Also, your page will think it's in a /abc/ directory, so all your client =
side
url's will have to be absolute (a pain for me).

What i've done is a cludge - 'hijack' one of the unused asp.net file =
extensions
- e.g. .asax, and map abc.asax --> this.aspx?site=3Dabc

This can easily be done with the instructions earlier in this thread.

I guess you're trying to make your site search-engine friendly?

The reason I hijacked one of the asp.net extensions is just so it's =
zero-set-up,
you can get the same results by adding a custom isapi filter for the =
extension
of your choice.

- David Brophy
Director, Cambro Limited,
(023) 80 679550=20
Click here to reveal e-mail address
Reply to this message...
 
    
Bob Dombroski
Havent tried it in 1.0, but in beta 2 what you propose
wouldnt work.
http://mysite.com/abc/ would not get processed by
asp.net, but only by iis, even if your default page in
the directory was an aspx file. The request must
specifically call a asp.net page (.aspx, .ashx, .asmx
or any file ext you map to the aspnet_isapi.dll) for
the httphandler to be invoked.

--- Scott <Click here to reveal e-mail address> wrote:
[Original message clipped]

__________________________________________________
Do You Yahoo!?
Yahoo! Sports - Coverage of the 2002 Olympic Games
http://sports.yahoo.com
Reply to this message...
 
    
David Brophy
On Mon, 18 Feb 2002 05:04:49 -0800 (PST), you wrote:

[Original message clipped]

Yes, that's more or less what I found.=20

- David Brophy
Director, Cambro Limited,
(023) 80 679550=20
Click here to reveal e-mail address
Reply to this message...
 
    
David Staheli
You can create a custom HttpModule (instead of an HttpHandler) to
intercept all incoming traffic. Then, use RewritePath() to serve the
correct page to the client.

-----Original Message-----
From: David Brophy [mailto:Click here to reveal e-mail address]=20
Sent: Monday, February 18, 2002 6:52 AM
To: aspnghttphandlers
Subject: [aspnghttphandlers] RE: Return an aspx page in an HttpHandler?

On Mon, 18 Feb 2002 05:04:49 -0800 (PST), you wrote:

[Original message clipped]

Yes, that's more or less what I found.=20

- David Brophy
Director, Cambro Limited,
(023) 80 679550=20
Click here to reveal e-mail address

| [aspnghttphandlers] member Click here to reveal e-mail address =3D YOUR ID
| http://www.asplists.com/asplists/aspnghttphandlers.asp =3D JOIN/QUIT
| http://www.asplists.com/search =3D SEARCH Archives
Reply to this message...
 
    
Steven A Smith (VIP)
What I would really like to do is allow easy, more descriptive shortcuts to
IBuySpy tabs via the URL. So for instance instead of going to
http://aspsmith.com/DesktopDefault.aspx?tabindex=2&tabid=32
I'd rather have it read
http://aspsmith.com/ibs/

If I can't have that, I suppose I'll make an ASPX page to handle it, like
this:
http://aspsmith.com/Tab.aspx?name=ibs

but the folder implementation would be my preference.

Steve

----- Original Message -----
From: "David Brophy" <Click here to reveal e-mail address>
To: "aspnghttphandlers" <Click here to reveal e-mail address>
Sent: Monday, February 18, 2002 6:04 AM
Subject: [aspnghttphandlers] RE: Return an aspx page in an HttpHandler?

On Sun, 17 Feb 2002 18:25:25 -0500, you wrote:

>I want to create a mapping between folders in the URL and pages. That is,
I
[Original message clipped]

It's difficult.

I tried to do this, but I think directories are handled a bit differently by
the
isapi routines (someone correct me if I'm wrong!).

Also, your page will think it's in a /abc/ directory, so all your client
side
url's will have to be absolute (a pain for me).

What i've done is a cludge - 'hijack' one of the unused asp.net file
extensions
- e.g. .asax, and map abc.asax --> this.aspx?site=abc

This can easily be done with the instructions earlier in this thread.

I guess you're trying to make your site search-engine friendly?

The reason I hijacked one of the asp.net extensions is just so it's
zero-set-up,
you can get the same results by adding a custom isapi filter for the
extension
of your choice.

- David Brophy
Director, Cambro Limited,
(023) 80 679550
Click here to reveal e-mail address

| [aspnghttphandlers] member Click here to reveal e-mail address = YOUR ID
| http://www.asplists.com/asplists/aspnghttphandlers.asp = JOIN/QUIT
| http://www.asplists.com/search = SEARCH Archives
Reply to this message...
 
    
Scott
I did a similar thing.

In my main navigation table I added a column called PageName. Which I used
to map a normal ("somepage.aspx") page name to an ugly page name
"index.aspx?navid=34....".

Then in the Application_BeginRequest event:

    string pagerequest = Request.Path.ToLower();
    if(pagerequest.IndexOf("default") == -1) && pagerequest.IndexOf("logoff")
== -1 ) //or any admin page
        {    //look up and retreive "real" page with QueryStrings
            //If any extra QueryStrings existed, add them to the end (for a forum or
etc...)
            string gotopage = NavigationFunctions.GetVanityPage(pagerequest) + "&" +
Request.QueryString;
            if(gotopage.EndsWith("&")) //remove extra &
            {
                gotopage = gotopage.Remove(gotopage.Length - 1, 1);
            }
            //RewritePath
            Context.RewritePath("~/" + gotopage);
        }

Then on with the rest of the portal.

HTH,
Scott

-----Original Message-----
From: Steven A Smith [mailto:Click here to reveal e-mail address]
Sent: Monday, February 18, 2002 3:34 PM
To: aspnghttphandlers
Subject: [aspnghttphandlers] RE: Return an aspx page in an HttpHandler?

What I would really like to do is allow easy, more descriptive shortcuts to
IBuySpy tabs via the URL. So for instance instead of going to
http://aspsmith.com/DesktopDefault.aspx?tabindex=2&tabid=32
I'd rather have it read
http://aspsmith.com/ibs/

If I can't have that, I suppose I'll make an ASPX page to handle it, like
this:
http://aspsmith.com/Tab.aspx?name=ibs

but the folder implementation would be my preference.

Steve

----- Original Message -----
From: "David Brophy" <Click here to reveal e-mail address>
To: "aspnghttphandlers" <Click here to reveal e-mail address>
Sent: Monday, February 18, 2002 6:04 AM
Subject: [aspnghttphandlers] RE: Return an aspx page in an HttpHandler?

On Sun, 17 Feb 2002 18:25:25 -0500, you wrote:

>I want to create a mapping between folders in the URL and pages. That is,
I
[Original message clipped]

It's difficult.

I tried to do this, but I think directories are handled a bit differently by
the
isapi routines (someone correct me if I'm wrong!).

Also, your page will think it's in a /abc/ directory, so all your client
side
url's will have to be absolute (a pain for me).

What i've done is a cludge - 'hijack' one of the unused asp.net file
extensions
- e.g. .asax, and map abc.asax --> this.aspx?site=abc

This can easily be done with the instructions earlier in this thread.

I guess you're trying to make your site search-engine friendly?

The reason I hijacked one of the asp.net extensions is just so it's
zero-set-up,
you can get the same results by adding a custom isapi filter for the
extension
of your choice.

- David Brophy
Director, Cambro Limited,
(023) 80 679550
Click here to reveal e-mail address

| [aspnghttphandlers] member Click here to reveal e-mail address = YOUR ID
| http://www.asplists.com/asplists/aspnghttphandlers.asp = JOIN/QUIT
| http://www.asplists.com/search = SEARCH Archives

| [aspnghttphandlers] member Click here to reveal e-mail address = YOUR ID
| http://www.asplists.com/asplists/aspnghttphandlers.asp = JOIN/QUIT
| http://www.asplists.com/search = SEARCH Archives
Reply to this message...
 
    
Gary Pupurs
On Mon, 18 Feb 2002 15:33:48 -0500, Steven A Smith wrote:
[Original message clipped]

This is actually quite EASY to do (but not if you haven't=
stumbled on
the best way to do it, as David reported).

I'm using it in my CMS project to handle two things:
- Handle redirects for moved pages through a database, instead of=

registering the URLs in IIS.
- Check to see if page is handled by my custom CMS. (If it is, I=
use
RewritePath, if not, the request passes through and is handled=
like
any other ASPX page.)

The cool thing is that this works for any .aspx Url on any=
'discount'
ISP, without custom IIS settings. However, if you don't want=
.aspx
at the end of your URLs, want legacy support for htm and asp
redirects(in my case), or prefer to use .html instead of .aspx,=
you
will have to tell IIS to send all Url requests through the aspnet=

executable.)

(Note that code is untested, I've uninstalled B2 on this machine=
and
not yet installed V1, sorry for any typos. Also note that the
web.config is Beta 2, I think the syntax changed slightly for v1.=

And I can't take complete credit for this code, it's based on=
ideas
from a VS.NET magazine article.).

Put something similar to this in your web.config:
=09=09<httpModules>
=09=09=09<add type=3D"IBuySpy.HttpModules.CleanUrlIntercept,
=09=09=09IBS.HttpModules" name=3D"IBuySpy.HttpModules" />
=09=09</httpModules>

Then put this in IBuySpy.HttpModules.cs and compile it to a dll=
in
/bin:

using System;
using System.Web;

namespace IBuySpy.HttpModules
{
=09public class CleanUrlIntercept : IHttpModule
=09{
=09=09public void Init(HttpApplication application)
=09=09{
=09=09=09//assign event handler to examine incoming page requests
=09=09=09application.BeginRequest +=3D
=09=09=09=09new EventHandler(Application_BeginRequest);
=09=09}

=09=09public void Application_BeginRequest(object sender, EventArgs=
e)
=09=09{
=09=09=09//cast sender into instance of HttpApplication class
=09=09=09HttpApplication application =3D (HttpApplication)sender;

=09=09=09//get the virtual path of the current request
=09=09=09string path =3D application.Request.Path;

=09=09=09// This is a simplified way of how I'm using this. =09=09
=09=09=09// LookupOidOfUrl, not included in this sample, just
=09=09=09// looks up the URL in a database table and retrieves
=09=09=09// the OID (GUID) of that URL, if exists.
=09=09=09string urlOid=3D LookupOidOfUrl(path);

=09=09=09if (!urlOid.Equals(String.Empty))
=09=09=09{
=09=09=09// Then I know this Url is part of my CMS, and the page below
=09=09=09// should handle it. Any other URLs simply pass through
=09=09=09// untouched, so my CMS can coexist with other full ASP.NET
=09=09=09// pages and applications on the same site. Nifty. Thanks=
MS!

=09=09=09// Rewrite the path to redirect processing of this request to
=09=09=09// another .aspx page. The browser URL will remain the
=09=09=09// 'clean' URL, unlike if we used Request.Redirect.
=09=09=09application.Context.RewritePath("/ShowAzaniPageObject.aspx?oid=
=3D" +
urlOid);
=09=09=09}
=09=09}
=09
=09}
}

Hope that gives you some ideas, Steven.

(I suppose it'd be useful for me to post an article on how to do=
this
somewhere, I really should get an AspAlliance account, I guess!)

--
Gary Pupurs, Click here to reveal e-mail address on 18/02/2002
Reply to this message...
 
    
Jeff Widmer
Steve,
This solution has nothing to do with httphandlers but...
Why can't you have a default.aspx page in the ibs folder (and any other
folder that you want the user to browse to with an easy url) redirect to the
correct tab in the DesktopDefault.aspx? In other words:

The user would browse to the http://aspsmith.com/ibs/ directory.
The directory has a default page of default.aspx
The default.aspx page only contains a redirect to
http://aspsmith.com/DesktopDefault.aspx?tabindex=2&tabid=32
assuming tabindex=2 and tabid=32 are correct for the ibs directory.
Do the same for any other's such as http://aspsmith.com/store, etc.

To even extend this further, the default.aspx page in each directory could
read a database table to determine which tabid to send to in the
desktopdefault.aspx.

This may have already been presented to you in another thread or on another
list, if it was then this suggestion is way OT.

-Jeff

-----Original Message-----
From: Steven A Smith [mailto:Click here to reveal e-mail address]
Sent: Monday, February 18, 2002 3:34 PM
To: aspnghttphandlers
Subject: [aspnghttphandlers] RE: Return an aspx page in an HttpHandler?

What I would really like to do is allow easy, more descriptive shortcuts to
IBuySpy tabs via the URL. So for instance instead of going to
http://aspsmith.com/DesktopDefault.aspx?tabindex=2&tabid=32
I'd rather have it read
http://aspsmith.com/ibs/

If I can't have that, I suppose I'll make an ASPX page to handle it, like
this:
http://aspsmith.com/Tab.aspx?name=ibs

but the folder implementation would be my preference.

Steve

----- Original Message -----
From: "David Brophy" <Click here to reveal e-mail address>
To: "aspnghttphandlers" <Click here to reveal e-mail address>
Sent: Monday, February 18, 2002 6:04 AM
Subject: [aspnghttphandlers] RE: Return an aspx page in an HttpHandler?

On Sun, 17 Feb 2002 18:25:25 -0500, you wrote:

>I want to create a mapping between folders in the URL and pages. That is,
I
[Original message clipped]

It's difficult.

I tried to do this, but I think directories are handled a bit differently by
the
isapi routines (someone correct me if I'm wrong!).

Also, your page will think it's in a /abc/ directory, so all your client
side
url's will have to be absolute (a pain for me).

What i've done is a cludge - 'hijack' one of the unused asp.net file
extensions
- e.g. .asax, and map abc.asax --> this.aspx?site=abc

This can easily be done with the instructions earlier in this thread.

I guess you're trying to make your site search-engine friendly?

The reason I hijacked one of the asp.net extensions is just so it's
zero-set-up,
you can get the same results by adding a custom isapi filter for the
extension
of your choice.

- David Brophy
Director, Cambro Limited,
(023) 80 679550
Click here to reveal e-mail address

| [aspnghttphandlers] member Click here to reveal e-mail address = YOUR ID
| http://www.asplists.com/asplists/aspnghttphandlers.asp = JOIN/QUIT
| http://www.asplists.com/search = SEARCH Archives

| [aspnghttphandlers] member Click here to reveal e-mail address = YOUR ID
| http://www.asplists.com/asplists/aspnghttphandlers.asp = JOIN/QUIT
| http://www.asplists.com/search = SEARCH Archives
Reply to this message...
 
    
Steven A Smith (VIP)
This is actually what I'm doing currently, but it is a hack and I'd like
something that can be managed entirely from the IBS Admin tab, and so it
should really not involve creating folders and files and such.

I have an almost working solution using an ASPX file that I'll probably post
to my enhancements page on my ASPSmith.com site soon (like this week).

Steve

----- Original Message -----
From: "Jeff Widmer" <Click here to reveal e-mail address>
To: "aspnghttphandlers" <Click here to reveal e-mail address>
Sent: Tuesday, February 19, 2002 12:13 AM
Subject: [aspnghttphandlers] RE: Return an aspx page in an HttpHandler?

[Original message clipped]
Reply to this message...
 
 
System.Activator
System.EventArgs
System.EventHandler
System.Runtime.Remoting.Contexts.Context
System.String
System.Type
System.Web.HttpApplication
System.Web.HttpContext
System.Web.IHttpHandler
System.Web.IHttpHandlerFactory
System.Web.IHttpModule
System.Web.UI.Page
System.Web.UI.PageParser




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