CURLOPT_COOKIEJAR - filename to store cookies to

#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_COOKIEJAR, char *filename);

Pass a filename as a char *, null-terminated. This makes libcurl write all internally known cookies to the specified file when curl_easy_cleanup(3) is called. If no cookies are kept in memory at that time, no file is created. Specify "-" as filename to instead have the cookies written to stdout. Using this option also enables cookies for this session, so if you for example follow a redirect it makes matching cookies get sent accordingly.

Note that libcurl does not read any cookies from the cookie jar specified with this option. To read cookies from a file, use CURLOPT_COOKIEFILE(3).

If the cookie jar file cannot be created or written to (when the curl_easy_cleanup(3) is called), libcurl does not and cannot report an error for this. Using CURLOPT_VERBOSE(3) or CURLOPT_DEBUGFUNCTION(3) displays a warning, but that is the only visible feedback you get about this possibly lethal situation.

Cookies are imported in the Set-Cookie format without a domain name are not exported by this option.

The application does not have to keep the string around after setting this option.



int main(void)
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "");
    /* export cookies to this file when closing the handle */
    curl_easy_setopt(curl, CURLOPT_COOKIEJAR, "/tmp/cookies.txt");
    res = curl_easy_perform(curl);
    /* close the handle, write the cookies! */

Along with HTTP

Returns CURLE_OK if HTTP is supported, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.


2024-05-22 libcurl