Commit 6790a543 authored by Daniel Stenberg's avatar Daniel Stenberg
Browse files

progressfunc: a simple CURLOPT_PROGRESSFUNCTION example

parent 2411adb4

docs/examples/.gitignore

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@@ -26,6 +26,7 @@ multi-single 
persistant

post-callback

postit2

progressfunc

resolve

rtsp

sendrecv

docs/examples/Makefile.inc

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@@ -4,7 +4,8 @@ check_PROGRAMS = 10-at-a-time anyauthput cookie_interface debug fileupload \ 
  https multi-app multi-debugcallback multi-double multi-post multi-single \

  persistant post-callback postit2 sepheaders simple simplepost simplessl  \

  sendrecv httpcustomheader certinfo chkspeed ftpgetinfo ftp-wildcard \

  smtp-multi simplesmtp smtp-tls rtsp externalsocket resolve

  smtp-multi simplesmtp smtp-tls rtsp externalsocket resolve \

  progressfunc



# These examples require external dependencies that may not be commonly

# available on POSIX systems, so don't bother attempting to compile them here.

docs/examples/progressfunc.c

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/***************************************************************************

 *                                  _   _ ____  _

 *  Project                     ___| | | |  _ \| |

 *                             / __| | | | |_) | |

 *                            | (__| |_| |  _ <| |___

 *                             \___|\___/|_| \_\_____|

 *

 * Copyright (C) 1998 - 2011, 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 http://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 <stdio.h>

#include <curl/curl.h>



#define STOP_DOWNLOAD_AFTER_THIS_MANY_BYTES 6000



static int progress(void *p,

                    double dltotal, double dlnow,

                    double ultotal, double ulnow)

{

  fprintf(stderr, "UP: %g of %g  DOWN: %g of %g\r\n",

          ulnow, ultotal, dlnow, dltotal);



  if(dlnow > STOP_DOWNLOAD_AFTER_THIS_MANY_BYTES)

    return 1;

  return 0;

}



int main(void)

{

  CURL *curl;

  CURLcode res=0;



  curl = curl_easy_init();

  if(curl) {

    curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/");

    curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress);

    curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);

    res = curl_easy_perform(curl);



    if(res)

      fprintf(stderr, "%s\n", curl_easy_strerror(res));



    /* always cleanup */

    curl_easy_cleanup(curl);

  }

  return (int)res;

}