Invalid DOCTYPE when parsing svg file

[gartcimore]

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• [ x] Have you included sample input, output, error, and expected output?
• Have you checked if you are using correct configuration?
• [ x] Did you try online tool?

Description

Library is-svg was using version 3.19.0. When upgrading to 4.1.2, some test cases are not successful anymore when parsing valid xml input samples
Branch with the change can be found here

Input

test cases from is-svg library is using this svg file
<?xml version="1.0" encoding="utf-8"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd" [ <!ENTITY Smile " <rect x='.5' y='.5' width='29' height='39' fill='black' stroke='red'/> <g transform='translate(0, 5)'> <circle cx='15' cy='15' r='10' fill='yellow'/><circle cx='12' cy='12' r='1.5' fill='black'/><circle cx='17' cy='12' r='1.5' fill='black'/><path d='M 10 19 L 15 23 20 19' stroke='black' stroke-width='2'/></g>"> ]><svg width="850px" height="700px" version="1.1" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(16,0,0,16,0,0)">&Smile;</g></svg>

Code

input = input.toString().trim();

if (XMLValidator.validate(input) !== true) {
		return false;
	}

	let jsonObject;
	const parser = new XMLParser();

	try {
		jsonObject = parser.parse(input);
	} catch (_) {
		return false;
	}

	if (!jsonObject) {
		return false;
	}

	if (!('svg' in jsonObject)) {
		return false;
	}

Output

Error: Invalid DOCTYPE
at readDocType (/Users/larustue/depots/is-svg/node_modules/fast-xml-parser/src/xmlparser/DocTypeReader.js:73:27)
at OrderedObjParser.parseXml (/Users/larustue/depots/is-svg/node_modules/fast-xml-parser/src/xmlparser/OrderedObjParser.js:246:24)
at XMLParser.parse (/Users/larustue/depots/is-svg/node_modules/fast-xml-parser/src/xmlparser/XMLParser.js:35:48)
at isSvg (/Users/larustue/depots/is-svg/index.js:24:23)
at /Users/larustue/depots/is-svg/test.js:66:14
at Test.callFn (/Users/larustue/depots/is-svg/node_modules/ava/lib/test.js:364:21)
at Test.run (/Users/larustue/depots/is-svg/node_modules/ava/lib/test.js:377:23)
at Runner.runSingle (/Users/larustue/depots/is-svg/node_modules/ava/lib/runner.js:259:19)
at /Users/larustue/depots/is-svg/node_modules/ava/lib/runner.js:322:16
at processTicksAndRejections (node:internal/process/task_queues:95:5)

expected data

I guess it should not failed because the XML is valid and doctype used to be correct, there seems to be backward compatibility broken somewhere

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[github-actions]

I'm glad you find this repository helpful. I'll try to address your issue ASAP. You can watch the repo for new changes or star it.

[amitguptagwl]

So many things were changed in version 3 and 4. Please check Changelog

[gartcimore]

I checked the changelog, nothing can be found about xml being invalid with entities in doctype. Is the provided example a valid xml in your opinion ? Should it trigger the exception of invalid doctype ?

[amitguptagwl]

After 4.0.0-beta.3 DOCTYPE are supported but with very limited features. You may probably want to set processEntities: false with XML parser.

[gartcimore]

I tried already with this option set, the behavior was the same, an error was still triggered

[amitguptagwl]

Have you tried with new version recently published?

[gartcimore]

I used the latest version 4.1.3 published, now everything is working perfectly, thanks