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When a user enters captcha and then clicks download on a file hosting site (lets say 4shared.com), the download starts. Is clicking on download (after entering captcha) sends a request to server or is it just a javascript action?
Thanks in advance.
If
captchais validated just by javascript, one could easily bypass capture by sending request directly to server (using curl, for example). So it would defeat the purpose ofcaptchaas a tool against automatic downloads by script.So it must be validated on server.