CURLOPT_COOKIE(3) Library Functions Manual CURLOPT_COOKIE(3)

CURLOPT_COOKIE - HTTP Cookie header

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

Pass a pointer to a null-terminated string as parameter. It is used to set one or more cookies in the HTTP request. The format of the string should be NAME=CONTENTS, where NAME is the cookie name and CONTENTS is what the cookie should contain.

To set multiple cookies, set them all using a single option concatenated like this: "name1=content1; name2=content2;" etc.

This option sets the cookie header explicitly in the outgoing request(s). If multiple requests are done due to authentication, followed redirections or similar, they all get this cookie passed on.

The cookies set by this option are separate from the internal cookie storage held by the cookie engine and they are not be modified by it. If you enable the cookie engine and either you have imported a cookie of the same name (e.g. 'foo') or the server has set one, it has no effect on the cookies you set here. A request to the server sends both the 'foo' held by the cookie engine and the 'foo' held by this option. To set a cookie that is instead held by the cookie engine and can be modified by the server use CURLOPT_COOKIELIST(3).

Using this option multiple times makes the last set string override the previous ones.

This option does not enable the cookie engine. Use CURLOPT_COOKIEFILE(3) or CURLOPT_COOKIEJAR(3) to enable parsing and sending cookies automatically.

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

If libcurl is built with PSL (Public Suffix List) support, it detects and discards cookies that are specified for such suffix domains that should not be allowed to have cookies. If libcurl is not built with PSL support, it has no ability to stop super cookies. PSL support is identified by the CURL_VERSION_PSL feature bit returned by curl_version_info(3).

NULL, no cookies

HTTP

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
    curl_easy_setopt(curl, CURLOPT_COOKIE, "tool=curl; fun=yes;");
    curl_easy_perform(curl);
  }
}

If HTTP is enabled

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

CURLINFO_COOKIELIST(3), CURLOPT_COOKIEFILE(3), CURLOPT_COOKIEJAR(3), CURLOPT_COOKIELIST(3), CURLOPT_HTTPHEADER(3)

2024-05-22 libcurl