How to use cURL to download web page with authentification (form)? Post: 302978812

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Top Forums UNIX for Beginners Questions & Answers How to use cURL to download web page with authentification (form)? Post 302978812 by MarcelOrMittal on Thursday 4th of August 2016 08:18:00 AM

08-04-2016

Registered User

How to use cURL to download web page with authentification (form)?

Hello,

I'm new in the forum and really beginer, and also sorry form my bad english.

I use linux and want to create little program to download automaticaly some pdf (invoices) and put in a folder of my computer. I learn how to do and programme with ubuntu but the program will be implemented on a mac osx so I look for compatible soft.

So I look for cURL.

I don't know if a subject is already open arround curl and authentification, if yes, please redirect me.

So,
I can download a pdf from a command line (good begining) but the file I want to get are on a web site with authentification form, and it's impossible to go directly to the url of the pdf, I have to go to login page, and when it's done I fall in the "home" part of the web site with an other authentification.

So I have to pass the form, pass a second form with just a number "personal code", and after go to the url of the file I want to download.

I try to pass the first authentification but I dont know if it's done or not, and i dont know how to, after authentification, keep the cookies and continu to pass the second authentification and ask cURL for the url of the file.

To begin, some body can maybe say me if with this command line I pass the form with succes or not: (XXXXX is the pass word and username)

Code:

curl --trace-ascii debugcyclosoftware.txt -d klantid=XXXXX -d wachtwoord=XXXXX https://s02.cyclesoftware.nl/app/cs/account/login/login/

You can see the form at the adress in the code.

And the debugcyclosoftware.txt is in attachement.

The second athentification is also a form but ask the "personnal code" to ride the web site.

When I look the debugcyclosoftware.txt file I see that I finish at location that I would like to go (home page), so it's done?

If i try to put a second url after the first to do a second post (for second form) I directly go back to the login page with a HTTP/1.1 302 Found.

But I maybe need a language like python or PHP to manage curl to do different action step by step and keep the cookie.

I don't know to mush php but I see that it work well with cURL.

Any advises or suggestion to help me to continu to learn and do?

I hope I m relatively clear...

Thanks a lot to having read =)

debugcyclosoftware.txt (10.3 KB)

MarcelOrMittal

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LEARN ABOUT PHP

curl_init

CURL_INIT(3)								 1							      CURL_INIT(3)

curl_init - Initialize a cURL session

SYNOPSIS

       resource curl_init NULL ([string  $url])

DESCRIPTION

	Initializes a new session and return a cURL handle for use with the curl_setopt(3), curl_exec(3), and curl_close(3) functions.

PARAMETERS

	      o $url
		- If provided, the CURLOPT_URL option will be set to its value. You can manually set this using the curl_setopt(3) function.

	      Note

		      The file protocol is disabled by cURL if open_basedir is set.

RETURN VALUES

	Returns a cURL handle on success, FALSE on errors.

EXAMPLES

       Example #1

	       Initializing a new cURL session and fetching a web page

	      <?php
	      // create a new cURL resource
	      $ch = curl_init();

	      // set URL and other appropriate options
	      curl_setopt($ch, CURLOPT_URL, "http://www.example.com/");
	      curl_setopt($ch, CURLOPT_HEADER, 0);

	      // grab URL and pass it to the browser
	      curl_exec($ch);

	      // close cURL resource, and free up system resources
	      curl_close($ch);
	      ?>

SEE ALSO

       curl_close(3), curl_multi_init(3).

PHP Documentation Group 													      CURL_INIT(3)