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What is Curl?
The Curl is a command-line tool available for Linux, Windows, and macOS and a cross-platform library (libcurl) that can be used with almost any application written in nearly any programming language. Curl uses URL syntax to transfer data to and from servers. With Curl, you can upload or download data, submit web forms, and make API requests using over 25 protocols, including HTTP, HTTPS, FTP, and SFTP.
What is Cookie?
Cookies are small blocks of data sent from a website and stored by a web browser on a user's computer. Cookies are placed on the device used to access the website (computer, mobile phone, etc.). Several cookies may be placed on the same computer during a session. Browsers send cookies back to the server with each subsequent request, allowing the server to determine if the request came from the same browser or not.
Cookies enable web servers to store state information on a user's device or track a user's online activity. The data stored in cookies are created by the server when it connects to the server. This data is tagged with an identifier that is unique to user and user's computer. Cookies are primarily used for user session management, user tracking, and personalization.
How set Cookie with Curl?
The following is a general form of the Curl command for sending a Cookies request :
What is cookie-jar?
The -c (or --cookie-jar) command-line option specifies the filename where Curl should write all cookies after the operation completes. Curl will report to the specified file all the cookies from its in-memory cookie store at the end of the process. If there are no cookies, Curl will not create the specified file. Below is an example of saving cookie syntax with Curl:
How to set cookies for Curl?
You can use the -b (or --cookie) command-line switch to pass cookies to Curl. Below is an example of setting cookies for Curl:
How to use Сookies with Libcurl?
|CURLOPT_COOKIE||Provide a cookie header to be sent to the server.|
|CURLOPT_COOKIEFILE||Read cookies from the given cookie jar file.|
|CURLOPT_COOKIEJAR||Save cookies to the specified cookie jar file.|
|CURLOPT_COOKIELIST||Provide details of one cookie.|
|CURLINFO_COOKIELIST||Extract cookie information from cookie storage.|