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/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 1998 - 2020, Daniel Stenberg, <[email protected]>, 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. * ***************************************************************************/ /* <DESC> * HTTP request with custom modified, removed and added headers * </DESC> */ #include <stdio.h> #include <curl/curl.h> int main(void) { CURL *curl; CURLcode res; curl = curl_easy_init(); if(curl) { struct curl_slist *chunk = NULL; /* Remove a header curl would otherwise add by itself */ chunk = curl_slist_append(chunk, "Accept:"); /* Add a custom header */ chunk = curl_slist_append(chunk, "Another: yes"); /* Modify a header curl otherwise adds differently */ chunk = curl_slist_append(chunk, "Host: example.com"); /* Add a header with "blank" contents to the right of the colon. Note that we're then using a semicolon in the string we pass to curl! */ chunk = curl_slist_append(chunk, "X-silly-header;"); /* set our custom set of headers */ curl_easy_setopt(curl, CURLOPT_HTTPHEADER, chunk); curl_easy_setopt(curl, CURLOPT_URL, "localhost"); curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); res = curl_easy_perform(curl); /* Check for errors */ if(res != CURLE_OK) fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res)); /* always cleanup */ curl_easy_cleanup(curl); /* free the custom headers */ curl_slist_free_all(chunk); } return 0; }