[fix] Ignore the slashes after the protocol for special URLs

Fixes #205
Fixes #206

index.js

@@ -98,6 +98,24 @@ function lolcation(loc) {
   return finaldestination;
 }
 
+/**
+ * Check whether a protocol scheme is special.
+ *
+ * @param {String} The protocol scheme of the URL
+ * @return {Boolean} `true` if the protocol scheme is special, else `false`
+ * @private
+ */
+function isSpecial(scheme) {
+  return (
+    scheme === 'ftp:' ||
+    scheme === 'file:' ||
+    scheme === 'http:' ||
+    scheme === 'https:' ||
+    scheme === 'ws:' ||
+    scheme === 'wss:'
+  );
+}
+
 /**
  * @typedef ProtocolExtract
  * @type Object
@@ -110,16 +128,32 @@ function lolcation(loc) {
  * Extract protocol information from a URL with/without double slash ("//").
  *
  * @param {String} address URL we want to extract from.
+ * @param {Object} location
  * @return {ProtocolExtract} Extracted information.
  * @private
  */
-function extractProtocol(address) {
+function extractProtocol(address, location) {
   address = trimLeft(address);
+  location = location || {};
 
-  var match = protocolre.exec(address)
-    , protocol = match[1] ? match[1].toLowerCase() : ''
-    , slashes = !!(match[2] && match[2].length >= 2)
-    , rest =  match[2] && match[2].length === 1 ? '/' + match[3] : match[3];
+  var match = protocolre.exec(address);
+  var protocol = match[1] ? match[1].toLowerCase() : '';
+  var rest = match[2] ? match[2] + match[3] : match[3];
+  var slashes = !!(match[2] && match[2].length >= 2);
+
+  if (protocol === 'file:') {
+    if (slashes) {
+      rest = rest.slice(2);
+    }
+  } else if (isSpecial(protocol)) {
+    rest = match[3];
+  } else if (protocol) {
+    if (rest.indexOf('//') === 0) {
+      rest = rest.slice(2);
+    }
+  } else if (slashes && location.hostname) {
+    rest = match[3];
+  }
 
   return {
     protocol: protocol,
@@ -214,7 +248,7 @@ function Url(address, location, parser) {
   //
   // Extract protocol information before running the instructions.
   //
-  extracted = extractProtocol(address || '');
+  extracted = extractProtocol(address || '', location);
   relative = !extracted.protocol && !extracted.slashes;
   url.slashes = extracted.slashes || relative && location.slashes;
   url.protocol = extracted.protocol || location.protocol || '';
@@ -224,7 +258,10 @@ function Url(address, location, parser) {
   // When the authority component is absent the URL starts with a path
   // component.
   //
-  if (!extracted.slashes || url.protocol === 'file:') {
+  if (
+    url.protocol === 'file:' ||
+    (!extracted.slashes && !isSpecial(extracted.protocol))
+  ) {
     instructions[3] = [/(.*)/, 'pathname'];
   }
 

test/test.js

@@ -93,7 +93,7 @@ describe('url-parse', function () {
       assume(parse.extractProtocol('//foo/bar')).eql({
         slashes: true,
         protocol: '',
-        rest: 'foo/bar'
+        rest: '//foo/bar'
       });
     });
 
@@ -440,7 +440,7 @@ describe('url-parse', function () {
     });
 
     it('handles the file: protocol', function () {
-      var slashes = ['', '/', '//', '///', '////', '/////'];
+      var slashes = ['', '/', '//', '///'];
       var data;
       var url;
 
@@ -451,6 +451,18 @@ describe('url-parse', function () {
         assume(data.href).equals('file:///');
       }
 
+      url = 'file:////';
+      data = parse(url);
+      assume(data.protocol).equals('file:');
+      assume(data.pathname).equals('//');
+      assume(data.href).equals(url);
+
+      url = 'file://///';
+      data = parse(url);
+      assume(data.protocol).equals('file:');
+      assume(data.pathname).equals('///');
+      assume(data.href).equals(url);
+
       url = 'file:///Users/foo/BAR/baz.pdf';
       data = parse(url);
       assume(data.protocol).equals('file:');