Tony BenBrahim created BATIK-1113:
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Summary: Hard to solve XML External Entities problem
Key: BATIK-1113
URL: https://issues.apache.org/jira/browse/BATIK-1113
Project: Batik
Issue Type: Bug
Components: SVG DOM
Affects Versions: 1.8
Reporter: Tony BenBrahim
Even if one agrees with the sentiments expressed in the comments of BATIK-1018,
it should be possible to turn off XML external entity processing without
subclassing Batik classes.
Take for example {{SAXSVGDocumentFactory}}, which extends
{{SAXDocumentFactory}}. When it comes time to parse the SVG in {{Document
createDocument(InputSource is)}}, line 401 of {{SAXDocumentFacotry}}, the code
uses either a String classname to instantiate the parser, or an internal static
factory with package visibility.
Therefore, the only way to create a parser is to subclass
{{SAXDocumentFactory}}, override {{createDocument}}, and create your own
parser, so that it can be configured to not process XEE.
Any class that parses XML should either:
- provide a public accessor method to access the default parser factory
- allow passing in a parser factory
- allow passing in a parser factory class name (less than ideal, requires user
to write their own parser factory)
- allow passing in a parser instance
In the case of {{SAXDocumentFactory}}, a simple {{public static
SAXParserFactory getDefaultParserFactory()}} would have obviated the need to
subclass.
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