How CURL Login with Captcha and Session

Question

define(\'COOKIE\', \'./cookie.txt\');
define(\'MYURL\', \'https://register.pandi.or.id/main\');

function getUrl($url, $method=\'\', $vars=\'\', $open=false) {
    $agents =          


        

Answer 1

It happens because,
You took your captcha image from first getURL (ie first curl_exec) and processed the captcha but to submit your captcha you are requested getURL (ie again curl_exec) which means to a new page with a new captcha again.

So you are placing the old captcha and putting it in the new captcha. I'm having the same problem & resolved it.

Answer 2

A captcha is intended to differentiate between humans and robots (programs). Seems like you are trying to log in with a program. The captcha seems to do its job :).

I don't see a legal way around.

Answer 3

Yes, Andro Selva is right. On the second request it gives new captcha. Once it loads captcha with getUrl function and the second load is from the save_captcha function, so this are 2 different images.

It must do something like this: Download the captcha image before close the curl and before post and tell the script to wait untill you provide captcha answer - I will use preg_match. It will require some javascript as well.

If the captcha image is generated from javascript, you need to execute this javascript with the same cookie or token. In this situation, the easier solution is to record the headers with e.g. livehttpheaders addon for mozila ffox.

Answer 4

Using a headless browsing solution this is possible. ie: zombie.js coffee.js on Node.. Also it may be possible to extract the "image" from the captcha and, using image recognition, "read" the image and convert it to text, which is then posted with the form.

As of today, the only surefire method to "trick" a captcha is to use headless browsing.

Answer 5

Captcha is a dynamic image created by the server when you hit the page. It will keep changing, you must extract the captcha from the page and then parse it and then submit your page for a login. Captcha will keep changing as and when the page is triggered to load!

Answer 6

With PHP I do not know how to do it, you have to get the captcha and find a way to solve it. It has a lot of algorithms to do it for you, but if you want to use java, I already hacked the source code from this link to get the code to solve the captcha and it works very well for a lot of captcha systems.

So, you could try to implement your own captcha solver, that will take a lot of time, try to find an existing implementation for PHP, or, IMHO, the best option, to use the JDownloader code base.