89 lines
2.3 KiB
Markdown
89 lines
2.3 KiB
Markdown
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---
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c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_PROTOCOLS_STR
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Section: 3
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Source: libcurl
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See-also:
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- CURLINFO_SCHEME (3)
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- CURLOPT_DEFAULT_PROTOCOL (3)
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- CURLOPT_REDIR_PROTOCOLS_STR (3)
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- CURLOPT_URL (3)
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- curl_version_info (3)
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---
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# NAME
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CURLOPT_PROTOCOLS_STR - allowed protocols
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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_PROTOCOLS_STR, char *spec);
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~~~
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# DESCRIPTION
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Pass a pointer to a string that holds a comma-separated list of case
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insensitive protocol names (URL schemes) to allow in the transfer. This
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option allows applications to use libcurl built to support a wide range of
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protocols but still limit specific transfers to only be allowed to use a
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subset of them. By default, libcurl accepts all protocols it was built with
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support for. See also CURLOPT_REDIR_PROTOCOLS_STR(3).
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If trying to set a non-existing protocol or if no matching protocol at all is
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set, it returns error.
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These are the available protocols:
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DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS,
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MQTT, POP3, POP3S, RTMP, RTMPE, RTMPS, RTMPT, RTMPTE, RTMPTS, RTSP, SCP, SFTP,
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SMB, SMBS, SMTP, SMTPS, TELNET, TFTP, WS, WSS
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You can set "ALL" as a short-cut to enable all protocols. Note that by setting
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all, you may enable protocols that were not supported the day you write this
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but are introduced in a future libcurl version.
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curl_version_info(3) can be used to get a list of all supported
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protocols in the current libcurl. CURLINFO_SCHEME(3) is the recommended
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way to figure out the protocol used in a previous transfer.
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# DEFAULT
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All protocols built-in
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# PROTOCOLS
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All
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# EXAMPLE
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~~~c
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int main(int argc, char **argv)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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/* pass in the URL from an external source */
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curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
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/* only allow HTTP, TFTP and SFTP */
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curl_easy_setopt(curl, CURLOPT_PROTOCOLS_STR, "http,tftp,sftp");
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/* Perform the request */
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curl_easy_perform(curl);
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}
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}
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~~~
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# AVAILABILITY
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Added in 7.85.0
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# RETURN VALUE
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Returns CURLE_UNKNOWN_OPTION if the option is not implemented,
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CURLE_UNSUPPORTED_PROTOCOL if a listed protocol is not supported or disabled,
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CURLE_BAD_FUNCTION_ARGUMENT if no protocol is listed else CURLE_OK.
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