[fix] Fix host parsing for file URLs (#210)

Fixes: #209 (comment)

Author: lpinca

Diff for: index.js

@@ -4,6 +4,7 @@ var required = require('requires-port')
   , qs = require('querystringify')
   , slashes = /^[A-Za-z][A-Za-z0-9+-.]*:\/\//
   , protocolre = /^([a-z][a-z0-9.+-]*:)?(\/\/)?([\\/]+)?([\S\s]*)/i
+  , windowsDriveLetter = /^[a-zA-Z]:/
   , whitespace = '[\\x09\\x0A\\x0B\\x0C\\x0D\\x20\\xA0\\u1680\\u180E\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200A\\u202F\\u205F\\u3000\\u2028\\u2029\\uFEFF]'
   , left = new RegExp('^'+ whitespace +'+');
 
@@ -279,7 +280,8 @@ function Url(address, location, parser) {
   // component.
   //
   if (
-    url.protocol === 'file:' ||
+    extracted.protocol === 'file:' && (
+      extracted.slashesCount !== 2 || windowsDriveLetter.test(address)) ||
     (!extracted.slashes &&
       (extracted.protocol ||
         extracted.slashesCount < 2 ||

Diff for: test/test.js

@@ -593,6 +593,13 @@ describe('url-parse', function () {
       assume(data.pathname).equals('/c:/foo/bar/');
       assume(data.href).equals('file:///c:/foo/bar/');
 
+      data = parse('file://host/file');
+      assume(data.protocol).equals('file:');
+      assume(data.host).equals('host');
+      assume(data.hostname).equals('host');
+      assume(data.pathname).equals('/file');
+      assume(data.href).equals('file://host/file');
+
       data = parse('foo/bar', 'file:///baz');
       assume(data.protocol).equals('file:');
       assume(data.pathname).equals('/foo/bar');