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progressfunc: a simple CURLOPT_PROGRESSFUNCTION example

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This commit is contained in:
Daniel Stenberg 2011-09-13 22:47:34 +02:00
parent 2411adb40b
commit 6790a543d4
3 changed files with 61 additions and 1 deletions
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1
docs/examples/.gitignore vendored
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@ -26,6 +26,7 @@ multi-single
persistant
post-callback
postit2
progressfunc
resolve
rtsp
sendrecv

3
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.

58
docs/examples/progressfunc.c Normal file
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@ -0,0 +1,58 @@
/***************************************************************************
* _ _ ____ _
* 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;
}