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  1. #1
    kamran_0313@yahoo.com is offline Novice
    Windows 7 32bit Access 2013 32bit
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    Dealing with captcha in ms access vba


    I develop app in ms access vba for data extraction from webpages.At present i am facing issue regarding captcha check.I use below mentioned methods for dealing with this check but unable to find permanent solution. I use sleep method and use 3 second time interval between each request.Also i use timer and stop code execution after every 8 minutes and restart execution after 10 minues.But still captcha check is creating problem for me.

  2. #2
    ranman256's Avatar
    ranman256 is offline VIP
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    captcha is there to prevent computer from using it. What are you wanting?

  3. #3
    kamran_0313@yahoo.com is offline Novice
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    Want to bypass captcha

  4. #4
    orange's Avatar
    orange is offline Moderator
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    I think the whole point of captcha is to prevent what you are trying to do with a program

  5. #5
    kamran_0313@yahoo.com is offline Novice
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    Because when i use above method i.e after 8 minutes i stop code and after 10 minutes restart with 3 minutes sleep time then captcha is visible after one hour i.e when data extraction is more then then captcha is visible so is there any method that captcha will be bypased for more hours.

  6. #6
    orange's Avatar
    orange is offline Moderator
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    ??? Try again to describe the issue. Simple English so we all understand the issue.
    Are you suggesting you can bypass captcha by pausing for some specified time??
    Or are you pausing your program, then manually responding to captcha, then continuing??
    Please clarify.

  7. #7
    AccessPower's Avatar
    AccessPower is offline Competent Performer
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    Why are you using VBA for this? There are plenty of reading resources and code libraries for bypassing captchas in other languages (Perl, PHP, Python to name a few). There are OCR tools already available.

    If you're feeling really fancy, you can develop an Artificial Neural Network in JS and create your own captcha bypassing system.

  8. #8
    kamran_0313@yahoo.com is offline Novice
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    Quote Originally Posted by orange View Post
    ??? Try again to describe the issue. Simple English so we all understand the issue.
    Are you suggesting you can bypass captcha by pausing for some specified time??
    Or are you pausing your program, then manually responding to captcha, then continuing??
    Please clarify.
    Yes actully at presennt after starting my script captcha message appears after 1-2 hours of data extraction.

  9. #9
    kamran_0313@yahoo.com is offline Novice
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    Quote Originally Posted by kamran_0313@yahoo.com View Post
    Yes actully at presennt after starting my script captcha message appears after 1-2 hours of data extraction.
    Did you get my point?

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