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      1 /***************************************************************************
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      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel (at) 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  * Show how to extract Location: header and URL to redirect to.
     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   char *location;
     34   long response_code;
     35 
     36   curl = curl_easy_init();
     37   if(curl) {
     38     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     39 
     40     /* example.com is redirected, figure out the redirection! */
     41 
     42     /* Perform the request, res will get the return code */
     43     res = curl_easy_perform(curl);
     44     /* Check for errors */
     45     if(res != CURLE_OK)
     46       fprintf(stderr, "curl_easy_perform() failed: %s\n",
     47               curl_easy_strerror(res));
     48     else {
     49       res = curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &response_code);
     50       if((res == CURLE_OK) &&
     51          ((response_code / 100) != 3)) {
     52         /* a redirect implies a 3xx response code */
     53         fprintf(stderr, "Not a redirect.\n");
     54       }
     55       else {
     56         res = curl_easy_getinfo(curl, CURLINFO_REDIRECT_URL, &location);
     57 
     58         if((res == CURLE_OK) && location) {
     59           /* This is the new absolute URL that you could redirect to, even if
     60            * the Location: response header may have been a relative URL. */
     61           printf("Redirected to: %s\n", location);
     62         }
     63       }
     64     }
     65 
     66     /* always cleanup */
     67     curl_easy_cleanup(curl);
     68   }
     69   return 0;
     70 }
     71