From 037a213cdbf87338b21f7af941692966794059cd Mon Sep 17 00:00:00 2001
From: Jakub Pawlowicz <contact@jakubpawlowicz.com>
Date: Mon, 4 May 2015 07:22:45 +0100
Subject: [PATCH] Fixes #448 - rebasing no protocol URIs.

When rebasing remote imports with URIs given without a protocol the
resulting CSS should also use no protocol, e.g:

```
@import "//127.0.0.1/no-protocol.css";
```

=>

```
a{background:url(//127.0.0.1/image.png)}
```
---
 History.md                    |  1 +
 lib/imports/inliner.js        |  3 ++-
 lib/urls/rewrite.js           |  2 +-
 test/protocol-imports-test.js | 38 +++++++++++++++++++++++++++++++++++
 4 files changed, 42 insertions(+), 2 deletions(-)

diff --git a/History.md b/History.md
index 43093b64..9d488514 100644
--- a/History.md
+++ b/History.md
@@ -8,6 +8,7 @@
 * Moves URL scanner into lib/urls/reduce (was named incorrectly before).
 * Moves URL rebasing & rewriting into lib/urls.
 * Fixed issue [#436](https://github.com/jakubpawlowicz/clean-css/issues/436) - refactors URI rewriting.
+* Fixed issue [#448](https://github.com/jakubpawlowicz/clean-css/issues/448) - rebasing no protocol URIs.
 
 [3.2.7 / 2015-05-03](https://github.com/jakubpawlowicz/clean-css/compare/v3.2.6...v3.2.7)
 ==================
diff --git a/lib/imports/inliner.js b/lib/imports/inliner.js
index 762ace74..1a77b57c 100644
--- a/lib/imports/inliner.js
+++ b/lib/imports/inliner.js
@@ -215,6 +215,7 @@ function inlineRemoteResource(importedFile, mediaQuery, context) {
   var importedUrl = REMOTE_RESOURCE.test(importedFile) ?
     importedFile :
     url.resolve(context.relativeTo, importedFile);
+  var originalUrl = importedUrl;
 
   if (importedUrl.indexOf('//') === 0)
     importedUrl = 'http:' + importedUrl;
@@ -263,7 +264,7 @@ function inlineRemoteResource(importedFile, mediaQuery, context) {
     res.on('end', function() {
       var importedData = chunks.join('');
       if (context.rebase)
-        importedData = rewriteUrls(importedData, { toBase: importedUrl }, context);
+        importedData = rewriteUrls(importedData, { toBase: originalUrl }, context);
       context.sourceReader.trackSource(importedUrl, importedData);
       importedData = context.sourceTracker.store(importedUrl, importedData);
       importedData = rebaseMap(importedData, importedUrl);
diff --git a/lib/urls/rewrite.js b/lib/urls/rewrite.js
index c4c52bda..af575008 100644
--- a/lib/urls/rewrite.js
+++ b/lib/urls/rewrite.js
@@ -18,7 +18,7 @@ function isEscaped(uri) {
 }
 
 function isRemote(uri) {
-  return uri.indexOf('http://') === 0 || uri.indexOf('https://') === 0;
+  return uri.indexOf('http://') === 0 || uri.indexOf('https://') === 0 || uri.indexOf('//') === 0;
 }
 
 function isImport(uri) {
diff --git a/test/protocol-imports-test.js b/test/protocol-imports-test.js
index 22a38f59..0e0c65e6 100644
--- a/test/protocol-imports-test.js
+++ b/test/protocol-imports-test.js
@@ -331,6 +331,44 @@ vows.describe('protocol imports').addBatch({
       nock.cleanAll();
     }
   },
+  'of a resource without protocol with rebase': {
+    topic: function() {
+      this.reqMocks = nock('http://127.0.0.1')
+        .get('/no-protocol.css')
+        .reply(200, 'a{background:url(image.png)}');
+
+      new CleanCSS().minify('@import url(//127.0.0.1/no-protocol.css);', this.callback);
+    },
+    'should not raise errors': function(errors, minified) {
+      assert.isNull(errors);
+    },
+    'should process @import': function(errors, minified) {
+      assert.equal(minified.styles, 'a{background:url(//127.0.0.1/image.png)}');
+    },
+    teardown: function() {
+      assert.isTrue(this.reqMocks.isDone());
+      nock.cleanAll();
+    }
+  },
+  'of a resource without protocol with rebase to another domain': {
+    topic: function() {
+      this.reqMocks = nock('http://127.0.0.1')
+        .get('/no-protocol.css')
+        .reply(200, 'a{background:url(//127.0.0.2/image.png)}');
+
+      new CleanCSS().minify('@import url(http://127.0.0.1/no-protocol.css);', this.callback);
+    },
+    'should not raise errors': function(errors, minified) {
+      assert.isNull(errors);
+    },
+    'should process @import': function(errors, minified) {
+      assert.equal(minified.styles, 'a{background:url(//127.0.0.2/image.png)}');
+    },
+    teardown: function() {
+      assert.isTrue(this.reqMocks.isDone());
+      nock.cleanAll();
+    }
+  },
   'of a resource available via POST only': {
     topic: function() {
       this.reqMocks = nock('http://127.0.0.1')
-- 
2.34.1