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