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Bug #48207 CURLOPT_FILE behaves unexpectedly with invalid file handle
Submitted: 2009-05-09 14:01 UTC Modified: 2009-05-21 12:53 UTC
From: mark at dynom dot nl Assigned:
Status: Closed Package: cURL related
PHP Version: 5.*, 6CVS (2009-05-09) OS: *
Private report: No CVE-ID:
 [2009-05-09 14:01 UTC] mark at dynom dot nl
Description:
------------
The option 'CURLOPT_FILE' takes a file handle as argument, however when you open the file read-only. cURL *silently* fails and downloads only 1 successful iteration of data.

This *only* happens when CURLOPT_RETURNTRANSFER is not defined, since that disables the 'CURLOPT_FILE' feature.

It's expected that some sort of warning/error is raised, just like when a write flag is set when the file is not writable. When the latter happens, cURL falls back on CURLOPT_RETURNTRANSFER = false.

Reproduce code:
---------------
<?php
error_reporting( E_ALL );

$ch = curl_init('http://kernel.org/pub/linux/kernel/v1.0/linux-1.0.tar.bz2');

$fp = fopen("/tmp/fubar", "r"); // Opening 'fubar' with the incorrect readonly flag
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_exec($ch);

// Debug
$info = curl_getinfo($ch);

if ($info['size_download'] !== $info["download_content_length"]) {
        echo 'fail';
} else {
        echo 'works';
}

curl_close($ch);


Expected result:
----------------
works

Actual result:
--------------
fail

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 [2009-05-09 14:03 UTC] mark at dynom dot nl
Sorry, the expected result is not 'works', it's an error being raised.
 [2009-05-10 08:17 UTC] mark at dynom dot nl
Tried it, but I don't get a notice, warning or error.
I'm testing with this roughly-edged test case: http://pastebin.com/f21c6a4e4
 [2009-05-10 17:04 UTC] jani@php.net
Thanks. That means it exists also in PHP_5_2. (That's why I asked..)
 [2009-05-21 12:53 UTC] iliaa@php.net
This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
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