Interacting with reCAPTCHA using httpwebrequest/webresponse

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Homer Simpson72

Newbie

Dec 6, 2015

23

0

• Dec 12, 2015

• #1

I have tried creating this thread before but I was unable to post it due to the content restrictions guidelines. I am trying to process by hand a reCaptcha form which is processed using the httpwebrequest/httpwebresponse classes and I get an "ERROR: Invalid domain for site key" when I try to post the CAPTCHA without a response. When I tried posting this thread with code the content restrictions did not allow me to submit the thread. Any help would be appreciated.

 

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gimme4free

Elite Member

Oct 22, 2008

1,935

1,989

• Dec 14, 2015

• #2

The "ERROR: Invalid domain for site key" error means that your site key ?k=xxxxx is malformed. Have you made sure to include an & before the next variable? Post your code onto pastebin & put the pastebin.com?link up if you have some sample code.

Or cross reference with this code, note that I am using other http classes & functions, just check the URL calls:

 

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Homer Simpson72

Newbie

Dec 6, 2015

23

0

• Dec 14, 2015
• Thread Starter Thread Starter

• #3

Thanks for your reply. I can't show my code because I am a newbie and BHW will not allow me to post links or my code. You did point me in the right direction with your code, however

 

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Homer Simpson72

Newbie

Dec 6, 2015

23

0

• Dec 17, 2015
• Thread Starter Thread Starter

• #4

Do you happen to know how to work with the reCaptcha boxes that require the "I am not a robot" checkbox? As it is right now with your code, the first exception is thrown. Here is my code. I found a way to insert it

 

Last edited: Dec 17, 2015

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gimme4free

Elite Member

Oct 22, 2008

1,935

1,989

• Dec 17, 2015

• #5

Homer Simpson72 said:

Do you happen to know how to work with the reCaptcha boxes that require the "I am not a robot" checkbox? As it is right now with your code, the first exception is thrown.

Click to expand...

Recaptcha V2 uses different site keys setup for V2 & also has different URL calls. This is something you will have to track the headers of yourself to fully understand & put it to use, V2 is a right pain in the ass!

 

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Homer Simpson72

Newbie

Dec 6, 2015

23

0

• Dec 17, 2015
• Thread Starter Thread Starter

• #6

Would this involve sniffing for packets with Fiddler and figuring out what information to send from that?

 

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gimme4free

Elite Member

Oct 22, 2008

1,935

1,989

• Dec 17, 2015

• #7

Homer Simpson72 said:

Would this involve sniffing for packets with Fiddler and figuring out what information to send from that?

Click to expand...

Yes, use an old browser, E.g. iPhone 3 or similar (Using a user agent switcher plugin) & you will be shown the 1-9 images of 'street signs' or similar instead of the checkbox. If you want to click the checkbox instead then I wish you luck, that is not an easy task at all!

 

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Homer Simpson72

Newbie

Dec 6, 2015

23

0

• Dec 17, 2015
• Thread Starter Thread Starter

• #8

Thank you so much for your help and kind words. Having this class in my toolbox would make me a very valuable bot coder indeed!

 

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Homer Simpson72

Newbie

Dec 6, 2015

23

0

• Dec 19, 2015
• Thread Starter Thread Starter

• #9

I have managed to debug this program to where I download the reCAPTCHA image. Attached is a screencap of the error I get, which is a 400 Bad request from google's Recaptcha V2 servers.

EDIT: My newbie status makes it difficult to post code.

 

Last edited: Dec 19, 2015