from small one page howto to huge articles all in one place
 

search text in:





Poll
Which linux distribution do you use?







poll results

Last additions:
using iotop to find disk usage hogs

using iotop to find disk usage hogs

words:

887

views:

109214

userrating:

average rating: 1.7 (85 votes) (1=very good 6=terrible)


May 25th. 2007:
Words

486

Views

223236

why adblockers are bad


Workaround and fixes for the current Core Dump Handling vulnerability affected kernels

Workaround and fixes for the current Core Dump Handling vulnerability affected kernels

words:

161

views:

103513

userrating:

average rating: 1.3 (28 votes) (1=very good 6=terrible)


April, 26th. 2006:

Druckversion
You are here: manpages





CURLOPT_PROGRESSFUNCTION

Section: curl_easy_setopt options (3)
Updated: February 03, 2016
Index Return to Main Contents

 

NAME

CURLOPT_PROGRESSFUNCTION - callback to progress meter function  

SYNOPSIS

#include <curl/curl.h>

int progress_callback(void *clientp,
                      double dltotal,
                      double dlnow,
                      double ultotal,
                      double ulnow);

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROGRESSFUNCTION, progress_callback);  

DESCRIPTION

Pass a pointer to your callback function, which should match the prototype shown above.

We encourage users to use the newer CURLOPT_XFERINFOFUNCTION(3) instead, if you can.

This function gets called by libcurl instead of its internal equivalent with a frequent interval. While data is being transferred it will be called very frequently, and during slow periods like when nothing is being transferred it can slow down to about one call per second.

clientp is the pointer set with CURLOPT_PROGRESSDATA(3), it is not used by libcurl but is only passed along from the application to the callback.

The callback gets told how much data libcurl will transfer and has transferred, in number of bytes. dltotal is the total number of bytes libcurl expects to download in this transfer. dlnow is the number of bytes downloaded so far. ultotal is the total number of bytes libcurl expects to upload in this transfer. ulnow is the number of bytes uploaded so far.

Unknown/unused argument values passed to the callback will be set to zero (like if you only download data, the upload size will remain 0). Many times the callback will be called one or more times first, before it knows the data sizes so a program must be made to handle that.

Returning a non-zero value from this callback will cause libcurl to abort the transfer and return CURLE_ABORTED_BY_CALLBACK.

If you transfer data with the multi interface, this function will not be called during periods of idleness unless you call the appropriate libcurl function that performs transfers.

CURLOPT_NOPROGRESS(3) must be set to 0 to make this function actually get called.  

DEFAULT

By default, libcurl has an internal progress meter. That's rarely wanted by users.  

PROTOCOLS

All  

EXAMPLE

https://curl.haxx.se/libcurl/c/progressfunc.html  

AVAILABILITY

Always  

RETURN VALUE

Returns CURLE_OK.  

SEE ALSO

CURLOPT_VERBOSE(3), CURLOPT_NOPROGRESS(3),


 

Index

NAME
SYNOPSIS
DESCRIPTION
DEFAULT
PROTOCOLS
EXAMPLE
AVAILABILITY
RETURN VALUE
SEE ALSO


Please read "Why adblockers are bad".



Other free services
toURL.org
Shorten long
URLs to short
links like
http://tourl.org/2
tourl.org
.
Reverse DNS lookup
Find out which hostname(s)
resolve to a
given IP or other hostnames for the server
www.reversednslookup.org
rdf newsfeed | rss newsfeed | Atom newsfeed
- Powered by LeopardCMS - Running on Gentoo -
Copyright 2004-2017 Sascha Nitsch Unternehmensberatung UG(haftungsbeschränkt)
Valid XHTML1.1 : Valid CSS : buttonmaker
- Level Triple-A Conformance to Web Content Accessibility Guidelines 1.0 -
- Copyright and legal notices -
Time to create this page: 2.8 ms