feat: add 126 mail provider routing

tests/content-utils.test.js

@@ -0,0 +1,66 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+
+const source = fs.readFileSync('content/utils.js', 'utf8');
+
+function extractFunction(name) {
+  const start = source.indexOf(`function ${name}(`);
+  if (start < 0) {
+    throw new Error(`missing function ${name}`);
+  }
+
+  let parenDepth = 0;
+  let signatureEnded = false;
+  let braceStart = -1;
+  for (let index = start; index < source.length; index += 1) {
+    const ch = source[index];
+    if (ch === '(') {
+      parenDepth += 1;
+    } else if (ch === ')') {
+      parenDepth -= 1;
+      if (parenDepth === 0) {
+        signatureEnded = true;
+      }
+    } else if (ch === '{' && signatureEnded) {
+      braceStart = index;
+      break;
+    }
+  }
+
+  if (braceStart < 0) {
+    throw new Error(`missing body for function ${name}`);
+  }
+
+  let depth = 0;
+  let end = braceStart;
+  for (; end < source.length; end += 1) {
+    const ch = source[end];
+    if (ch === '{') depth += 1;
+    if (ch === '}') {
+      depth -= 1;
+      if (depth === 0) {
+        end += 1;
+        break;
+      }
+    }
+  }
+
+  return source.slice(start, end);
+}
+
+test('detectScriptSource maps 126 mail hosts to the shared 163 mail source', () => {
+  const bundle = [extractFunction('detectScriptSource')].join('\n');
+  const api = new Function(`
+${bundle}
+return { detectScriptSource };
+`)();
+
+  assert.equal(
+    api.detectScriptSource({
+      url: 'https://mail.126.com/js6/main.jsp',
+      hostname: 'mail.126.com',
+    }),
+    'mail-163'
+  );
+});