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Annotation of embedaddon/curl/docs/examples/url2file.c, revision 1.1

1.1     ! misho       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:  * Download a given URL into a local file named page.out.
        !            24:  * </DESC>
        !            25:  */
        !            26: #include <stdio.h>
        !            27: #include <stdlib.h>
        !            28: #include <unistd.h>
        !            29: 
        !            30: #include <curl/curl.h>
        !            31: 
        !            32: static size_t write_data(void *ptr, size_t size, size_t nmemb, void *stream)
        !            33: {
        !            34:   size_t written = fwrite(ptr, size, nmemb, (FILE *)stream);
        !            35:   return written;
        !            36: }
        !            37: 
        !            38: int main(int argc, char *argv[])
        !            39: {
        !            40:   CURL *curl_handle;
        !            41:   static const char *pagefilename = "page.out";
        !            42:   FILE *pagefile;
        !            43: 
        !            44:   if(argc < 2) {
        !            45:     printf("Usage: %s <URL>\n", argv[0]);
        !            46:     return 1;
        !            47:   }
        !            48: 
        !            49:   curl_global_init(CURL_GLOBAL_ALL);
        !            50: 
        !            51:   /* init the curl session */
        !            52:   curl_handle = curl_easy_init();
        !            53: 
        !            54:   /* set URL to get here */
        !            55:   curl_easy_setopt(curl_handle, CURLOPT_URL, argv[1]);
        !            56: 
        !            57:   /* Switch on full protocol/debug output while testing */
        !            58:   curl_easy_setopt(curl_handle, CURLOPT_VERBOSE, 1L);
        !            59: 
        !            60:   /* disable progress meter, set to 0L to enable it */
        !            61:   curl_easy_setopt(curl_handle, CURLOPT_NOPROGRESS, 1L);
        !            62: 
        !            63:   /* send all data to this function  */
        !            64:   curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, write_data);
        !            65: 
        !            66:   /* open the file */
        !            67:   pagefile = fopen(pagefilename, "wb");
        !            68:   if(pagefile) {
        !            69: 
        !            70:     /* write the page body to this file handle */
        !            71:     curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, pagefile);
        !            72: 
        !            73:     /* get it! */
        !            74:     curl_easy_perform(curl_handle);
        !            75: 
        !            76:     /* close the header file */
        !            77:     fclose(pagefile);
        !            78:   }
        !            79: 
        !            80:   /* cleanup curl stuff */
        !            81:   curl_easy_cleanup(curl_handle);
        !            82: 
        !            83:   curl_global_cleanup();
        !            84: 
        !            85:   return 0;
        !            86: }