Screen captures via HTTP requests

[Andreik]

I saw many people look for a way to transfer screen camputres from a computer to another. Here I want to present a simple way to do that via HTTP requests (thanks to Manadar HTTP server example). It's very customizable, there are options to capture all screen or just some specific areas, to capture mouse cursor and set image quality.

EDIT:

- fixed memory leak in client

- add option to get desktop width & height from remoted computer

- fixed mouse cursor show/hide

I hope this will help some of you.

Server.au3

Client.au3

Edited March 24, 2012 by Andreik

[JScript]

Very nice, I'll do some tests and I return with results!

Thank you for sharing!

Regards,

João Carlos.

[Andreik]

Thank you! Check out the source now. There was a memory leak in client but now is fixed.

[JScript]

OK, I'll copy and update the code!

Regards,

João Carlos.

[JScript]

Hello @Andreik

I checked the operation of the code and made ​​some changes to accelerate the capture and use less CPU.

I was not able to close the window of the Client module, so I made ​​some changes too.

I confess I had never used the InetRead() function, I noticed that she makes the following call:

I captured this image from the program: Process Explorer (sysinternals)!

I think the should be called by DLLCall() function, it would be much better!

Download:

Screen_captures_via_HTTP_requests.zip

Regards,

João Carlos.

Edited March 26, 2012 by JScript

[Andreik]

Yup, InetGet() uses functions from wininet.dll but I'm not sure how much performance I gain if I call directly functions from wininet.dll. Anyway I found some good resources on MSDN. I'll make a test and come back with the results.

Some good links for start:

http://msdn.microsoft.com/en-us/library/windows/desktop/aa385096%28v=vs.85%29.aspx

http://msdn.microsoft.com/en-us/library/windows/desktop/aa384363%28v=vs.85%29.aspx

http://msdn.microsoft.com/en-us/library/windows/desktop/aa384233%28v=vs.85%29.aspx

Edited March 26, 2012 by Andreik

[JScript]

Surely the performance will be better, because if you open Process Explorer you will see the Rundll32.exe file opening and closing all the time!

In a frantic pace, very crazy!!!

Do You tested the changes I have made?

Regards,

João Carlos.

[Andreik]

Yes, I tested. It's much better. Today I was busy with creating AVI file of session. As you know it's easy as uncompressed AVI but finally I got it work fine with XVID and without getting SaveOption window. Next step now it's to replace InetRead() if you say isn't so performant. Thank you!

[Andreik]

I found on forum WinINet UDF (a little modified because of conflicts between variables from different UDFs) and I wrote an example using it but I don't see any performance even if are used dll calls. With my initial example server use max 10% CPU and client max 15% CPU (I run both on same PC). About memory server use ~15Mb memory and client same. And this example using WinINet: server use 15% CPU and max 25Mb memory and client use 25% CPU and 25-50 Mb memory (very variable). Let me know how it works for you.

WinInet Example.rar

[JScript]

Excellent!

Now I no longer see what was happening in this picture:

"Rundll32.exe" opening and closing like crazy, in a frenetic rhythm!

It may not make a difference in the CPU load, but in reading the HDD will be enough!

Updates that I'm doing in my program (), will have to be redone...

Best regards,

João Carlos.

Edited March 27, 2012 by JScript