protofeats.c
/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, 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 * ***************************************************************************/ /* <DESC> * Outputs all protocols and features supported * </DESC> */ #include <stdio.h> #include <curl/curl.h> #if !CURL_AT_LEAST_VERSION(7,87,0) #error "too old libcurl" #endif int main(void) { curl_version_info_data *ver; const char *const *ptr; curl_global_init(CURL_GLOBAL_ALL); ver = curl_version_info(CURLVERSION_NOW); printf("Protocols:\n"); for(ptr = ver->protocols; *ptr; ++ptr) printf(" %s\n", *ptr); printf("Features:\n"); for(ptr = ver->feature_names; *ptr; ++ptr) printf(" %s\n", *ptr); curl_global_cleanup(); return 0; }
Notice
This source code example is simplified and ignores return
codes and error checks to a large extent. We do this to highlight the libcurl
function calls and related options and reduce unrelated code.
A real-world application will of course properly check every return value and exit correctly at the first serious error.