xf.li | 6c8fc1e | 2023-08-12 00:11:09 -0700 | [diff] [blame] | 1 | /*************************************************************************** |
| 2 | * _ _ ____ _ |
| 3 | * Project ___| | | | _ \| | |
| 4 | * / __| | | | |_) | | |
| 5 | * | (__| |_| | _ <| |___ |
| 6 | * \___|\___/|_| \_\_____| |
| 7 | * |
| 8 | * Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al. |
| 9 | * |
| 10 | * This software is licensed as described in the file COPYING, which |
| 11 | * you should have received as part of this distribution. The terms |
| 12 | * are also available at https://curl.se/docs/copyright.html. |
| 13 | * |
| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell |
| 15 | * copies of the Software, and permit persons to whom the Software is |
| 16 | * furnished to do so, under the terms of the COPYING file. |
| 17 | * |
| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| 19 | * KIND, either express or implied. |
| 20 | * |
| 21 | * SPDX-License-Identifier: curl |
| 22 | * |
| 23 | ***************************************************************************/ |
| 24 | /* <DESC> |
| 25 | * Extract headers post transfer with the header API |
| 26 | * </DESC> |
| 27 | */ |
| 28 | #include <stdio.h> |
| 29 | #include <curl/curl.h> |
| 30 | |
| 31 | static size_t write_cb(char *data, size_t n, size_t l, void *userp) |
| 32 | { |
| 33 | /* take care of the data here, ignored in this example */ |
| 34 | (void)data; |
| 35 | (void)userp; |
| 36 | return n*l; |
| 37 | } |
| 38 | |
| 39 | int main(void) |
| 40 | { |
| 41 | CURL *curl; |
| 42 | |
| 43 | curl = curl_easy_init(); |
| 44 | if(curl) { |
| 45 | CURLcode res; |
| 46 | struct curl_header *header; |
| 47 | curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); |
| 48 | /* example.com is redirected, so we tell libcurl to follow redirection */ |
| 49 | curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L); |
| 50 | |
| 51 | /* this example just ignores the content */ |
| 52 | curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_cb); |
| 53 | |
| 54 | /* Perform the request, res will get the return code */ |
| 55 | res = curl_easy_perform(curl); |
| 56 | /* Check for errors */ |
| 57 | if(res != CURLE_OK) |
| 58 | fprintf(stderr, "curl_easy_perform() failed: %s\n", |
| 59 | curl_easy_strerror(res)); |
| 60 | |
| 61 | if(CURLHE_OK == curl_easy_header(curl, "Content-Type", 0, CURLH_HEADER, |
| 62 | -1, &header)) |
| 63 | printf("Got content-type: %s\n", header->value); |
| 64 | |
| 65 | printf("All server headers:\n"); |
| 66 | { |
| 67 | struct curl_header *h; |
| 68 | struct curl_header *prev = NULL; |
| 69 | do { |
| 70 | h = curl_easy_nextheader(curl, CURLH_HEADER, -1, prev); |
| 71 | if(h) |
| 72 | printf(" %s: %s (%u)\n", h->name, h->value, (int)h->amount); |
| 73 | prev = h; |
| 74 | } while(h); |
| 75 | |
| 76 | } |
| 77 | /* always cleanup */ |
| 78 | curl_easy_cleanup(curl); |
| 79 | } |
| 80 | return 0; |
| 81 | } |