From: jose dot rob dot jr at gmail dot com
Operating system:
PHP version: 5.2.9
PHP Bug Type: Feature/Change Request
Bug description: Add support for forcing DOM to validate a DOMDocument with a DTD
Description:
------------
I need to validate XML files before loading them, then I created a DTD and
hosted it.
With python I can distribute the DTD file with the program and validate
the XML file locally.
A python example:
---
from lxml import etree
from StringIO import StringIO
xmlstart="""<?xml version="1.0" encoding="utf8"?>
<!DOCTYPE example PUBLIC '-//Example//Example DTD'
'http://example.com/mydtd.dtd'>"""
xmlok=xmlstart+"<example>The XML file</example>";
xmlinvalid=xmlstart+"<example><a>test</a>The XML file</example>";
dtddata="<!ELEMENT example (#PCDATA) >";
f=StringIO(dtddata);
dtd=etree.DTD(f);
print "Valid XML:";
xml1=etree.XML(xmlok);
validation=dtd.validate(xml1);
print validation;
print dtd.error_log.filter_from_errors();
print "Invalid XML:";
xml2=etree.XML(xmlinvalid);
validation=dtd.validate(xml2);
print validation;
print dtd.error_log.filter_from_errors();
----
The only way I find to port this stript is using DOMDocument::validate()
but this method will get the DTD from http://example.com/mydtd.dtd and be
slower, generate traffic, and fail when example.com is off-line...
I suggest adding an attribute like DOMDocument::validate($source) where
$source is a string with DTD source to avoid situations like this...
Reproduce code:
---------------
<?php
$xmlstart=<<<XML
<?xml version="1.0" encoding="utf8"?>
<!DOCTYPE example PUBLIC '-//Example//Example DTD'
'http://example.com/mydtd.dtd'>
XML;
$xmlok=$xmlstart."<example>The XML file</example>";
$xmlinvalid=$xmlstart."<example><a>test</a>The XML
file</example>";
$dtddata="<!ELEMENT example (#PCDATA) >";
print "<h1>Valid XML:</h1>";
$xml1=DOMDocument::loadXML($xmlok);
$validation=(int)$xml1->validate($dtddata); //Example that would work
print "<p><b>$validation</b></p>";
print "<h1>Invalid XML:</h1>";
$xml1=DOMDocument::loadXML($xmlinvalid);
$validation=(int)$xml1->validate($dtddata); //Example that would work
print "<p><b>$validation</b></p>";
?>
Expected result:
----------------
Valid XML:
1
Invalid XML:
Warning: DOMDocument::validate() [function.DOMDocument-validate]: Element
example was declared #PCDATA but contains non text nodes in
/script/path/xml.php on line 19
Warning: DOMDocument::validate() [function.DOMDocument-validate]: No
declaration for element a in /script/path/xml.php on line 19
0
Actual result:
--------------
When no argument is passed to validate and DTD server is off-line:
Valid XML:
Warning: DOMDocument::validate(http://example.com/mydtd.dtd)
[function.DOMDocument-validate]: failed to open stream: HTTP request
failed! HTTP/1.1 404 Not Found in /script/path/xml.php on line 14
Warning: DOMDocument::validate() [function.DOMDocument-validate]: I/O
warning : failed to load external entity "http://example.com/mydtd.dtd" in
/script/path/xml.php on line 14
Warning: DOMDocument::validate() [function.DOMDocument-validate]: Could
not load the external subset "http://example.com/mydtd.dtd" in
/script/path/xml.php on line 14
0
Invalid XML:
Warning: DOMDocument::validate(http://example.com/mydtd.dtd)
[function.DOMDocument-validate]: failed to open stream: HTTP request
failed! HTTP/1.1 404 Not Found in /script/path/xml.php on line 19
Warning: DOMDocument::validate() [function.DOMDocument-validate]: I/O
warning : failed to load external entity "http://example.com/mydtd.dtd" in
/script/path/xml.php on line 19
Warning: DOMDocument::validate() [function.DOMDocument-validate]: Could
not load the external subset "http://example.com/mydtd.dtd" in
/script/path/xml.php on line 19
0
--
Edit bug report at http://bugs.php.net/?id=48080&edit=1
--
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=48080&r=trysnapshot52
Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=48080&r=trysnapshot53
Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=48080&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=48080&r=fixedcvs
Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=48080&r=needdocs
Fixed in release: http://bugs.php.net/fix.php?id=48080&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=48080&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=48080&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=48080&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=48080&r=support
Expected behavior: http://bugs.php.net/fix.php?id=48080&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=48080&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=48080&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=48080&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=48080&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=48080&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=48080&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=48080&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=48080&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=48080&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=48080&r=mysqlcfg