Bug #71566 [NEW]: cURL SFTP Transfers Extremely Slow / Timing Out

From: Date: Wed, 10 Feb 2016 20:22:37 +0000
Subject: Bug #71566 [NEW]: cURL SFTP Transfers Extremely Slow / Timing Out
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-199152@lists.php.net to get a copy of this message
From:             cphill at email dot arizona dot edu
Operating system: Windows Server 2008 R2 Standard
PHP version:      5.6.18
Package:          cURL related
Bug Type:         Bug
Bug description:cURL SFTP Transfers Extremely Slow / Timing Out

Description:
------------
Note that the script below with the CURLOPT_BUFFERSIZE commented
illustrates the problem. Uncommenting the CURLOPT_BUFFERSIZE line that
sets a 4096 buffer size resolves the problem. 

This appears to confirm the issue report libssh2 #50 (see
https://github.com/libssh2/libssh2/issues/50).
We encountered timeout
failures on our sftp transfers immediately upon upgrading from PHP
5.6.17 to 5.6.18 that seems to have problems with SFTP transfers when
using the default buffer size.


Test script:
---------------
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $remote);
curl_setopt($curl, CURLOPT_PROTOCOLS, CURLPROTO_SFTP);
curl_setopt($curl, CURLOPT_SSH_AUTH_TYPES, CURLSSH_AUTH_PUBLICKEY);
curl_setopt($curl, CURLOPT_SSH_PRIVATE_KEYFILE,
$keysFolder.$keyFileName);         curl_setopt($curl, CURLOPT_KEYPASSWD,
$password);                                  //curl_setopt($curl,
CURLOPT_BUFFERSIZE, 4096);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
$data = curl_exec($curl);
$info = curl_getinfo($curl);
myPrintArray($info);


-- 
Edit bug report at https://bugs.php.net/bug.php?id=71566&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=71566&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=71566&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=71566&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=71566&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=71566&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=71566&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=71566&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=71566&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=71566&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=71566&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=71566&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=71566&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=71566&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=71566&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=71566&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=71566&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=71566&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=71566&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=71566&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=71566&r=mysqlcfg



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