Detect XML UTF-16-BE & UTF-16-LE via pattern matching (#490)

sindresorhus · Sep 17, 2021 · a2cf2b3 · a2cf2b3
1 parent 8bca6b4
commit a2cf2b3
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diff --git a/core.js b/core.js
@@ -1210,6 +1210,16 @@ async function _fromTokenizer(tokenizer) {
 		};
 	}
 
+	if (
+		check([0xFE, 0xFF, 0, 60, 0, 63, 0, 120, 0, 109, 0, 108]) // UTF-16-BOM-LE
+			|| check([0xFF, 0xFE, 60, 0, 63, 0, 120, 0, 109, 0, 108, 0]) // UTF-16-BOM-LE
+	) {
+		return {
+			ext: 'xml',
+			mime: 'application/xml',
+		};
+	}
+
 	// -- Unsafe signatures --
 
 	if (

diff --git a/fixture/fixture-utf16-be-bom.xml b/fixture/fixture-utf16-be-bom.xml
diff --git a/fixture/fixture-utf16-le-bom.xml b/fixture/fixture-utf16-le-bom.xml
diff --git a/test.js b/test.js
@@ -209,6 +209,8 @@ const names = {
 	xml: [
 		'fixture',
 		'fixture-utf8-bom', // UTF-8 with BOM
+		'fixture-utf16-be-bom', // UTF-16 little endian encoded XML, with BOM
+		'fixture-utf16-le-bom', // UTF-16 big endian encoded XML, with BOM
 	],
 };