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80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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/* <DESC>
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* Extract headers post transfer with the header API
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* </DESC>
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*/
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#include <stdio.h>
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#include <curl/curl.h>
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static size_t write_cb(char *data, size_t n, size_t l, void *userp)
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{
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/* take care of the data here, ignored in this example */
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(void)data;
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(void)userp;
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return n*l;
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}
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int main(void)
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{
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CURL *curl;
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curl = curl_easy_init();
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if(curl) {
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CURLcode res;
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struct curl_header *header;
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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/* example.com is redirected, so we tell libcurl to follow redirection */
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curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
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/* this example just ignores the content */
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curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_cb);
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/* Perform the request, res will get the return code */
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res = curl_easy_perform(curl);
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/* Check for errors */
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if(res != CURLE_OK)
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fprintf(stderr, "curl_easy_perform() failed: %s\n",
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curl_easy_strerror(res));
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if(CURLHE_OK == curl_easy_header(curl, "Content-Type", 0, CURLH_HEADER,
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-1, &header))
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printf("Got content-type: %s\n", header->value);
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printf("All server headers:\n");
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{
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struct curl_header *h;
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struct curl_header *prev = NULL;
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do {
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h = curl_easy_nextheader(curl, CURLH_HEADER, -1, prev);
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if(h)
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printf(" %s: %s (%u)\n", h->name, h->value, (int)h->amount);
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prev = h;
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} while(h);
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}
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/* always cleanup */
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curl_easy_cleanup(curl);
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}
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return 0;
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}
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