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135665036f
In order to not encourage users to use incompatible function pointers, change the callback function definitions to use `char *` instead of `void *` for the first argument. Triggered by https://stackoverflow.com/questions/79921871/curl-c-c-library-based-application-produces-erronious-response-for-http-post-r#comment141032037_79921871 : "The code was mostly modified from [this example code](https://curl.se/libcurl/c/postinmemory.html), honestly I never knew this is wrong. Thanks for pointing it out." Signed-off-by: Ted Lyngmo <ted@lyncon.se> Closes #21265
88 lines
2.4 KiB
C
88 lines
2.4 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) 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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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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/* <DESC>
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* Extract lots of TLS certificate info.
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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 *ptr, size_t size, size_t nmemb, void *stream)
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{
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(void)stream;
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(void)ptr;
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return size * nmemb;
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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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CURLcode result;
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result = curl_global_init(CURL_GLOBAL_ALL);
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if(result != CURLE_OK)
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return (int)result;
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curl = curl_easy_init();
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/");
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curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_cb);
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curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
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curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
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curl_easy_setopt(curl, CURLOPT_VERBOSE, 0L);
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curl_easy_setopt(curl, CURLOPT_CERTINFO, 1L);
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result = curl_easy_perform(curl);
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if(result == CURLE_OK) {
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struct curl_certinfo *certinfo;
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result = curl_easy_getinfo(curl, CURLINFO_CERTINFO, &certinfo);
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if(!result && certinfo) {
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int i;
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printf("%d certs!\n", certinfo->num_of_certs);
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for(i = 0; i < certinfo->num_of_certs; i++) {
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struct curl_slist *slist;
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for(slist = certinfo->certinfo[i]; slist; slist = slist->next)
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printf("%s\n", slist->data);
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}
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}
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}
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curl_easy_cleanup(curl);
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}
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curl_global_cleanup();
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return (int)result;
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}
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