XMLParser CDATA content lost on Linux when foundCDATA not implemented #5280
Description
When a delegate implements foundCharacters but NOT foundCDATA:
- macOS: CDATA content passed through
foundCharacters - Linux: CDATA content lost entirely
Reproduction
macOS
import Foundation
#if canImport(FoundationXML)
import FoundationXML
#endif
class TestDelegate: NSObject, XMLParserDelegate {
var foundText: [String] = []
func parser(_ parser: XMLParser, foundCharacters string: String) {
print("foundCharacters called with: '\(string)'")
foundText.append(string)
}
func parser(_ parser: XMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
print("didEndElement: \(elementName), accumulated: '\(foundText.joined())'")
}
}
let xml = """
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="html"><![CDATA[<b>Bold</b> text]]></string>
</resources>
"""
let data = Data(xml.utf8)
let parser = XMLParser(data: data)
let delegate = TestDelegate()
parser.delegate = delegate
print("Starting parse...")
let success = parser.parse()
print("Parse success: \(success)")
print("Total accumulated text: '\(delegate.foundText.joined())'")Linux
import Foundation
#if canImport(FoundationXML)
import FoundationXML
#endif
class TestDelegate: XMLParserDelegate {
var foundText: [String] = []
func parser(_ parser: XMLParser, foundCharacters string: String) {
print("foundCharacters called with: '\(string)'")
foundText.append(string)
}
func parser(_ parser: XMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
print("didEndElement: \(elementName), accumulated: '\(foundText.joined())'")
}
}
let xml = """
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="html"><![CDATA[<b>Bold</b> text]]></string>
</resources>
"""
let data = Data(xml.utf8)
let parser = XMLParser(data: data)
let delegate = TestDelegate()
parser.delegate = delegate
print("Starting parse...")
let success = parser.parse()
print("Parse success: \(success)")
print("Total accumulated text: '\(delegate.foundText.joined())'")macOS Output
Starting parse...
foundCharacters called with: '
'
foundCharacters called with: '<b>Bold</b> text'
didEndElement: string, accumulated: '
<b>Bold</b> text'
foundCharacters called with: '
'
didEndElement: resources, accumulated: '
<b>Bold</b> text
'
Parse success: true
Total accumulated text: '
<b>Bold</b> text
'
Linux Output
Starting parse...
foundCharacters called with: '
'
didEndElement: string, accumulated: '
'
foundCharacters called with: '
'
didEndElement: resources, accumulated: '
'
Parse success: true
Total accumulated text: '
'
The CDATA content <b>Bold</b> text is present on macOS but completely missing on Linux.
Environment
- Swift: 6.2 (swift-6.2-RELEASE)
- macOS: Sequoia 15.1 (Build 26.0.1)
- Linux: Ubuntu 24.04.3 LTS (Docker: swift:6.2)
Related Issues
- [SR-2301] NSXMLParser not fully implemented #4342 - NSXMLParser not fully implemented
- Error Domain=NSXMLParserErrorDomain Code=1 "(null)" on Linux when parsing larger amount of data #4851 - Error Domain=NSXMLParserErrorDomain Code=1 on Linux