From 76cb9c2a39d477a64824a985ade40507e3bbade1 Mon Sep 17 00:00:00 2001
From: Adam Mathes <adam@adammathes.com>
Date: Fri, 13 Feb 2026 21:34:48 -0800
Subject: feat(vanilla): add testing infrastructure and tests (NK-wjnczv)

---
 vanilla/node_modules/data-urls/lib/parser.js | 69 ++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 vanilla/node_modules/data-urls/lib/parser.js

(limited to 'vanilla/node_modules/data-urls/lib/parser.js')

diff --git a/vanilla/node_modules/data-urls/lib/parser.js b/vanilla/node_modules/data-urls/lib/parser.js
new file mode 100644
index 0000000..f3f708f
--- /dev/null
+++ b/vanilla/node_modules/data-urls/lib/parser.js
@@ -0,0 +1,69 @@
+"use strict";
+const { MIMEType } = require("whatwg-mimetype");
+const { parseURL, serializeURL, percentDecodeString } = require("whatwg-url");
+const { stripLeadingAndTrailingASCIIWhitespace, isomorphicDecode, forgivingBase64Decode } = require("./utils.js");
+
+module.exports = stringInput => {
+  const urlRecord = parseURL(stringInput);
+
+  if (urlRecord === null) {
+    return null;
+  }
+
+  return module.exports.fromURLRecord(urlRecord);
+};
+
+module.exports.fromURLRecord = urlRecord => {
+  if (urlRecord.scheme !== "data") {
+    return null;
+  }
+
+  const input = serializeURL(urlRecord, true).substring("data:".length);
+
+  let position = 0;
+
+  let mimeType = "";
+  while (position < input.length && input[position] !== ",") {
+    mimeType += input[position];
+    ++position;
+  }
+  mimeType = stripLeadingAndTrailingASCIIWhitespace(mimeType);
+
+  if (position === input.length) {
+    return null;
+  }
+
+  ++position;
+
+  const encodedBody = input.substring(position);
+
+  let body = percentDecodeString(encodedBody);
+
+  // Can't use /i regexp flag because it isn't restricted to ASCII.
+  const mimeTypeBase64MatchResult = /(.*); *[Bb][Aa][Ss][Ee]64$/u.exec(mimeType);
+  if (mimeTypeBase64MatchResult) {
+    const stringBody = isomorphicDecode(body);
+    body = forgivingBase64Decode(stringBody);
+
+    if (body === null) {
+      return null;
+    }
+    mimeType = mimeTypeBase64MatchResult[1];
+  }
+
+  if (mimeType.startsWith(";")) {
+    mimeType = `text/plain${mimeType}`;
+  }
+
+  let mimeTypeRecord;
+  try {
+    mimeTypeRecord = new MIMEType(mimeType);
+  } catch {
+    mimeTypeRecord = new MIMEType("text/plain;charset=US-ASCII");
+  }
+
+  return {
+    mimeType: mimeTypeRecord,
+    body
+  };
+};
-- 
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