text: /***************************************************************************
   *                                  _   _ ____  _
   *  Project                     ___| | | |  _ \| |
   *                             / __| | | | |_) | |
   *                            | (__| |_| |  _ <| |___
   *                             \___|\___/|_| \_\_____|
   *
   * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
   *
   * This software is licensed as described in the file COPYING, which
   * you should have received as part of this distribution. The terms
   * are also available at https://curl.haxx.se/docs/copyright.html.
   *
   * You may opt to use, copy, modify, merge, publish, distribute and/or sell
   * copies of the Software, and permit persons to whom the Software is
   * furnished to do so, under the terms of the COPYING file.
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
   * KIND, either express or implied.
   *
   ***************************************************************************/
  #include "test.h"
  
  #include "memdebug.h"
  
  static char data[]="this is what we post to the silly web server\n";
  
  struct WriteThis {
    char *readptr;
    size_t sizeleft;
  };
  
  static size_t read_callback(void *ptr, size_t size, size_t nmemb, void *userp)
  {
    struct WriteThis *pooh = (struct WriteThis *)userp;
  
    if(size*nmemb < 1)
      return 0;
  
    if(pooh->sizeleft) {
      *(char *)ptr = pooh->readptr[0]; /* copy one single byte */
      pooh->readptr++;                 /* advance pointer */
      pooh->sizeleft--;                /* less data left */
      return 1;                        /* we return 1 byte at a time! */
    }
  
    return 0;                         /* no more data left to deliver */
  }
  
  int test(char *URL)
  {
    CURL *curl;
    CURLcode res = CURLE_OK;
  
    struct WriteThis pooh;
  
    pooh.readptr = data;
    pooh.sizeleft = strlen(data);
  
    if(curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK) {
      fprintf(stderr, "curl_global_init() failed\n");
      return TEST_ERR_MAJOR_BAD;
    }
  
    curl = curl_easy_init();
    if(!curl) {
      fprintf(stderr, "curl_easy_init() failed\n");
      curl_global_cleanup();
      return TEST_ERR_MAJOR_BAD;
    }
  
    /* First set the URL that is about to receive our POST. */
    test_setopt(curl, CURLOPT_URL, URL);
  
    /* Now specify we want to POST data */
    test_setopt(curl, CURLOPT_POST, 1L);
  
  #ifdef CURL_DOES_CONVERSIONS
    /* Convert the POST data to ASCII */
    test_setopt(curl, CURLOPT_TRANSFERTEXT, 1L);
  #endif
  
    /* Set the expected POST size */
    test_setopt(curl, CURLOPT_POSTFIELDSIZE, (long)pooh.sizeleft);
  
    /* we want to use our own read function */
    test_setopt(curl, CURLOPT_READFUNCTION, read_callback);
  
    /* pointer to pass to our read function */
    test_setopt(curl, CURLOPT_READDATA, &pooh);
  
    /* get verbose debug output please */
    test_setopt(curl, CURLOPT_VERBOSE, 1L);
  
    /* include headers in the output */
    test_setopt(curl, CURLOPT_HEADER, 1L);
  
    /* Perform the request, res will get the return code */
    res = curl_easy_perform(curl);
  
  test_cleanup:
  
    /* always cleanup */
    curl_easy_cleanup(curl);
    curl_global_cleanup();
  
    return res;
  }
  