intercepting HTML?

[L#]

Hi,
I'm looking for a starting point here. I want to 'intercept' incoming
HTML on the client, before it's handled by the browser. Is this
possible?
Kind regards ,
Ludwig

 

[Chad Z. Hower aka Kudzu]

I'm looking for a starting point here. I want to 'intercept' incoming
HTML on the client, before it's handled by the browser. Is this
possible?

You can do this by building a CERN proxy and configuring the browser to use
the proxy. But this requires the user to set the proxy settings. Is this
acceptable in your situation?

If not, you'll have to hook in at a much lower level, and its a LOT more
work.


--
Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/
"Programming is an art form that fights back"


ELKNews - Get your free copy at http://www.atozedsoftware.com

 

[L#]

You can do this by building a CERN proxy and configuring the browser to use
the proxy. But this requires the user to set the proxy settings. Is this
acceptable in your situation?

If not, you'll have to hook in at a much lower level, and its a LOT more
work.

Thanks for the answer. Letting the user set the proxy is not
acceptable. So like you suggested, it should be done at a lower level.
And that's the reason that I posted this message
So I guess it's not something that could easily be done in C#?

Regards,
Ludwig

 

[Chad Z. Hower aka Kudzu]

So I guess it's not something that could easily be done in C#?

Not easily no. And I dont think it can be done using managed code at all. I
think the interfaces for this are all at the low level.


--
Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/
"Programming is an art form that fights back"


ELKNews - Get your free copy at http://www.atozedsoftware.com

 

[pchapman]

The answer to your question is asyncronous url monikers.

I got the idea from Visual Studio. If you have ever used visual
studio help, you can see this in action. Bring up help and right
click on the page and bring up the properties: It uses help:\\. Now
try to go find the page referenced on your hard disk....

The browser actually does it's work via com monikers. There are
several installed as part of ie. For example, if you type
res:\\file.exe?foo.html, there is a res: com object that will open
file.exe and try to find a resource called foo.html and stream it
back to the browser.

I wrote a zip:\\ com object for the browser: Usage is
zip:\\file.zip?test.html. It opens the zip file, locates the file
and decompresses it back to the browswer.

I've also built thin thin clients that don't use a webserver using
this method. The com object does a standard three-tier client server
application, caching lots of information on the client and building
the html on the fly on the client. The only traffic to the server
was the database calls. Never have you seen webpages fly like this
(I had an application where the latency of the web was way too
slow!).

To write a com object to intercept calls between the server and
browser should be about 100 lines of code. You can write it an
managed or unmanaged code.