Req #48080 [Com]: Add support for forcing DOM to validate a DOMDocument with a DTD

Edit report at http://bugs.php.net/bug.php?id=48080&edit=1 ID: 48080 Comment by: php at example dot com Reported by: jose dot rob dot jr at gmail dot com Summary: Add support for forcing DOM to validate a DOMDocument with a DTD Status: Open Type: Feature/Change Request Package: Feature/Change Request PHP Version: 5.2.9 Block user comment: N New Comment: It should also be noted that this affects any DOMDocuments using the standard XHTML SystemIDs. The W3C decided to block all requests to their URIs. See http://www.w3.org/blog/systeam/2008/02/08/w3c_s_excessive_dtd_traffic Previous Comments: ------------------------------------------------------------------------ [2009-04-26 17:17:38] jose dot rob dot jr at gmail dot com 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 this bug report at http://bugs.php.net/bug.php?id=48080&edit=1