.\" ************************************************************************** .\" * _ _ ____ _ .\" * Project ___| | | | _ \| | .\" * / __| | | | |_) | | .\" * | (__| |_| | _ <| |___ .\" * \___|\___/|_| \_\_____| .\" * .\" * Copyright (C) Daniel Stenberg, , et al. .\" * .\" * This software is licensed as described in the file COPYING, which .\" * you should have received as part of this distribution. The terms .\" * are also available at https://curl.se/docs/copyright.html. .\" * .\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell .\" * copies of the Software, and permit persons to whom the Software is .\" * furnished to do so, under the terms of the COPYING file. .\" * .\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY .\" * KIND, either express or implied. .\" * .\" * SPDX-License-Identifier: curl .\" * .\" ************************************************************************** .\" .TH CURLOPT_DEFAULT_PROTOCOL 3 "January 02, 2023" "libcurl 7.88.1" "curl_easy_setopt options" .SH NAME CURLOPT_DEFAULT_PROTOCOL \- default protocol to use if the URL is missing a scheme name .SH SYNOPSIS .nf #include CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DEFAULT_PROTOCOL, char *protocol); .fi .SH DESCRIPTION This option tells libcurl to use \fIprotocol\fP if the URL is missing a scheme name. Use one of these protocol (scheme) names: dict, file, ftp, ftps, gopher, http, https, imap, imaps, ldap, ldaps, pop3, pop3s, rtsp, scp, sftp, smb, smbs, smtp, smtps, telnet, tftp An unknown or unsupported protocol causes error \fICURLE_UNSUPPORTED_PROTOCOL\fP when libcurl parses a URL without a scheme. Parsing happens when \fIcurl_easy_perform(3)\fP or \fIcurl_multi_perform(3)\fP is called. The protocols supported by libcurl will vary depending on how it was built. Use \fIcurl_version_info(3)\fP if you need a list of protocol names supported by the build of libcurl that you are using. This option does not change the default proxy protocol (http). Without this option libcurl would make a guess based on the host, see \fICURLOPT_URL(3)\fP for details. The application does not have to keep the string around after setting this option. .SH DEFAULT NULL (make a guess based on the host) .SH PROTOCOLS All .SH EXAMPLE .nf curl = curl_easy_init(); if(curl) { /* set a URL without a scheme */ curl_easy_setopt(curl, CURLOPT_URL, "example.com"); /* set the default protocol (scheme) for schemeless URLs */ curl_easy_setopt(curl, CURLOPT_DEFAULT_PROTOCOL, "https"); /* Perform the request */ curl_easy_perform(curl); } .fi .SH AVAILABILITY Added in 7.45.0 .SH RETURN VALUE CURLE_OK if the option is supported. CURLE_OUT_OF_MEMORY if there was insufficient heap space. CURLE_UNKNOWN_OPTION if the option is not supported. .SH "SEE ALSO" .BR CURLOPT_URL "(3), "