104 lines
2.6 KiB
Markdown
104 lines
2.6 KiB
Markdown
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---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_COOKIEFILE
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_COOKIE (3)
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- CURLOPT_COOKIEJAR (3)
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- CURLOPT_COOKIESESSION (3)
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---
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# NAME
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CURLOPT_COOKIEFILE - filename to read cookies from
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_COOKIEFILE, char *filename);
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~~~
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# DESCRIPTION
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Pass a pointer to a null-terminated string as parameter. It should point to
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the filename of your file holding cookie data to read. The cookie data can be
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in either the old Netscape / Mozilla cookie data format or just regular HTTP
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headers (Set-Cookie style) dumped to a file.
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It also enables the cookie engine, making libcurl parse and send cookies on
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subsequent requests with this handle.
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By passing the empty string ("") to this option, you enable the cookie engine
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without reading any initial cookies. If you tell libcurl the filename is "-"
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(just a single minus sign), libcurl instead reads from stdin.
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This option only **reads** cookies. To make libcurl write cookies to file,
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see CURLOPT_COOKIEJAR(3).
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If you read cookies from a plain HTTP headers file and it does not specify a
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domain in the Set-Cookie line, then the cookie is not sent since the cookie
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domain cannot match the target URL's. To address this, set a domain in
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Set-Cookie line (doing that includes subdomains) or preferably: use the
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Netscape format.
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If you use this option multiple times, you add more files to read cookies
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from.
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The application does not have to keep the string around after setting this
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option.
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Setting this option to NULL (since 7.77.0) explicitly disables the cookie
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engine and clears the list of files to read cookies from.
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# SECURITY
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This document previously mentioned how specifying a non-existing file can also
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enable the cookie engine. While true, we strongly advise against using that
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method as it is too hard to be sure that files that stay that way in the long
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run.
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# DEFAULT
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NULL
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# PROTOCOLS
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HTTP
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode res;
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
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/* get cookies from an existing file */
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curl_easy_setopt(curl, CURLOPT_COOKIEFILE, "/tmp/cookies.txt");
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res = curl_easy_perform(curl);
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curl_easy_cleanup(curl);
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}
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}
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~~~
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# Cookie file format
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The cookie file format and general cookie concepts in curl are described
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online here: https://curl.se/docs/http-cookies.html
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# AVAILABILITY
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As long as HTTP is supported
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# RETURN VALUE
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Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not.
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