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curl

    1: /***************************************************************************
    2:  *                                  _   _ ____  _
    3:  *  Project                     ___| | | |  _ \| |
    4:  *                             / __| | | | |_) | |
    5:  *                            | (__| |_| |  _ <| |___
    6:  *                             \___|\___/|_| \_\_____|
    7:  *
    8:  * Copyright (C) 1998 - 2019, 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.haxx.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:  ***************************************************************************/
   22: /* <DESC>
   23:  * Simple HTTPS GET
   24:  * </DESC>
   25:  */
   26: #include <stdio.h>
   27: #include <curl/curl.h>
   28: 
   29: int main(void)
   30: {
   31:   CURL *curl;
   32:   CURLcode res;
   33: 
   34:   curl_global_init(CURL_GLOBAL_DEFAULT);
   35: 
   36:   curl = curl_easy_init();
   37:   if(curl) {
   38:     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
   39: 
   40: #ifdef SKIP_PEER_VERIFICATION
   41:     /*
   42:      * If you want to connect to a site who isn't using a certificate that is
   43:      * signed by one of the certs in the CA bundle you have, you can skip the
   44:      * verification of the server's certificate. This makes the connection
   45:      * A LOT LESS SECURE.
   46:      *
   47:      * If you have a CA cert for the server stored someplace else than in the
   48:      * default bundle, then the CURLOPT_CAPATH option might come handy for
   49:      * you.
   50:      */
   51:     curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
   52: #endif
   53: 
   54: #ifdef SKIP_HOSTNAME_VERIFICATION
   55:     /*
   56:      * If the site you're connecting to uses a different host name that what
   57:      * they have mentioned in their server certificate's commonName (or
   58:      * subjectAltName) fields, libcurl will refuse to connect. You can skip
   59:      * this check, but this will make the connection less secure.
   60:      */
   61:     curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
   62: #endif
   63: 
   64:     /* Perform the request, res will get the return code */
   65:     res = curl_easy_perform(curl);
   66:     /* Check for errors */
   67:     if(res != CURLE_OK)
   68:       fprintf(stderr, "curl_easy_perform() failed: %s\n",
   69:               curl_easy_strerror(res));
   70: 
   71:     /* always cleanup */
   72:     curl_easy_cleanup(curl);
   73:   }
   74: 
   75:   curl_global_cleanup();
   76: 
   77:   return 0;
   78: }