Bug #51903 [NEW]: simplexml_load_file() doesn't use HTTP headers

From: Date: Tue, 25 May 2010 05:17:04 +0000
Subject: Bug #51903 [NEW]: simplexml_load_file() doesn't use HTTP headers
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-150784@lists.php.net to get a copy of this message
From:             
Operating system: 
PHP version:      5.3.2
Package:          SimpleXML related
Bug Type:         Bug
Bug description:simplexml_load_file() doesn't use HTTP headers

Description:
------------
Seen at http://stackoverflow.com/questions/2899274/

If you use simplexml_load_file() to load a remote document via HTTP,
SimpleXML assumes that the content is UTF-8 regardless of the HTTP headers.
In the test script below, at the time of writing, Google's web server
returns something like:

-------------
HTTP/1.1 200 OK
Content-Type: text/xml; charset=GB2312
Date: Tue, 25 May 2010 05:05:17 GMT
Pragma: no-cache
Expires: Fri, 01 Jan 1990 00:00:00 GMT
Cache-Control: no-cache, no-store, must-revalidate
expires=Thu, 24-May-2012 05:05:17 GMT; path=/; domain=.google.com
X-Content-Type-Options: nosniff
Server: igfe
X-XSS-Protection: 1; mode=block
Transfer-Encoding: chunked

<?xml version="1.0"?><xml_api_reply version="1">
<!-- single-byte encoded GB2312 stuff -->
</xml_api_reply>
-------------

The server advertises the content "text/xml; charset=GB2312", but since the
XML declaration doesn't mention the encoding, SimpleXML assumes it is UTF-8
and eventually fails to load it.

If it is at all possible, SimpleXML (and DOM, I assume) should look at the
HTTP headers to find the document's encoding.

Test script:
---------------
simplexml_load_file('http://www.google.com/ig/api?weather=11791&hl=zh-CN');

Actual result:
--------------
PHP Warning:  simplexml_load_file():
http://www.google.com/ig/api?weather=11791&hl=zh-CN:1:
parser error : Input
is not proper UTF-8, indicate encoding !
Bytes: 0xC7 0xE7 0x22 0x2F in Command line code on line 1

Warning: simplexml_load_file():
http://www.google.com/ig/api?weather=11791&hl=zh-CN:1:
parser error : Input
is not proper UTF-8, indicate encoding !
Bytes: 0xC7 0xE7 0x22 0x2F in Command line code on line 1
PHP Warning:  simplexml_load_file(): t_system
data="SI"/></forecast_information><current_conditions><condition
data=" in
Command line code on line 1

Warning: simplexml_load_file(): t_system
data="SI"/></forecast_information><current_conditions><condition
data=" in
Command line code on line 1
PHP Warning:  simplexml_load_file():                                       
                                        ^ in Command line code on line 1

Warning: simplexml_load_file():

-- 
Edit bug report at http://bugs.php.net/bug.php?id=51903&edit=1
-- 
Try a snapshot (PHP 5.2):            http://bugs.php.net/fix.php?id=51903&r=trysnapshot52
Try a snapshot (PHP 5.3):            http://bugs.php.net/fix.php?id=51903&r=trysnapshot53
Try a snapshot (PHP 6.0):            http://bugs.php.net/fix.php?id=51903&r=trysnapshot60
Fixed in SVN:                        http://bugs.php.net/fix.php?id=51903&r=fixed
Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=51903&r=needdocs
Fixed in release:                    http://bugs.php.net/fix.php?id=51903&r=alreadyfixed
Need backtrace:                      http://bugs.php.net/fix.php?id=51903&r=needtrace
Need Reproduce Script:               http://bugs.php.net/fix.php?id=51903&r=needscript
Try newer version:                   http://bugs.php.net/fix.php?id=51903&r=oldversion
Not developer issue:                 http://bugs.php.net/fix.php?id=51903&r=support
Expected behavior:                   http://bugs.php.net/fix.php?id=51903&r=notwrong
Not enough info:                     http://bugs.php.net/fix.php?id=51903&r=notenoughinfo
Submitted twice:                     http://bugs.php.net/fix.php?id=51903&r=submittedtwice
register_globals:                    http://bugs.php.net/fix.php?id=51903&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=51903&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=51903&r=dst
IIS Stability:                       http://bugs.php.net/fix.php?id=51903&r=isapi
Install GNU Sed:                     http://bugs.php.net/fix.php?id=51903&r=gnused
Floating point limitations:          http://bugs.php.net/fix.php?id=51903&r=float
No Zend Extensions:                  http://bugs.php.net/fix.php?id=51903&r=nozend
MySQL Configuration Error:           http://bugs.php.net/fix.php?id=51903&r=mysqlcfg



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