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CURLOPT_COOKIEJAR(3) Library Functions Manual CURLOPT_COOKIEJAR(3) NAME CURLOPT_COOKIEJAR - filename to store cookies to SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_COOKIEJAR, char *filename); DESCRIPTION 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. Us- ing this option also enables cookies for this session, so if you for exam- ple 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 er- ror for this. Using CURLOPT_VERBOSE(3) or CURLOPT_DEBUGFUNCTION(3) displays a warning, but that is the only visible feedback you get about this possi- bly 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. Using this option multiple times makes the last set string override the previous ones. Set it to NULL to disable its use again. SECURITY CONCERNS libcurl cannot fully protect against attacks where an attacker has write access to the same directory where it is directed to save files. This is particularly sensitive if you save files using elevated privileges. libcurl creates the file to store cookies using default file permissions, meaning that on *nix systems you may need to restrict your umask to prevent other users on the same system to access the file. DEFAULT NULL PROTOCOLS This functionality affects http only EXAMPLE int main(void) { CURL *curl = curl_easy_init(); if(curl) { CURLcode result; curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin"); /* export cookies to this file when closing the handle */ curl_easy_setopt(curl, CURLOPT_COOKIEJAR, "/tmp/cookies.txt"); result = curl_easy_perform(curl); /* close the handle, write the cookies */ curl_easy_cleanup(curl); } } AVAILABILITY Added in curl 7.9 RETURN VALUE curl_easy_setopt(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). SEE ALSO CURLOPT_COOKIE(3), CURLOPT_COOKIEFILE(3), CURLOPT_COOKIELIST(3) libcurl 2026-06-11 CURLOPT_COOKIEJAR(3)
NAME | SYNOPSIS | DESCRIPTION | SECURITY CONCERNS | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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