loosen URL handling for non-native URL schemes

AUTHORS.rst

@@ -141,3 +141,4 @@ Patches and Suggestions
 - Vikram Oberoi @voberoi
 - Can Ibanoglu <can.ibanoglu@gmail.com> @canibanoglu
 - Thomas Weißschuh <thomas@t-8ch.de> @t-8ch
+- Jayson Vantuyl <jayson@aggressive.ly> @kagato

requests/models.py

@@ -320,6 +320,11 @@ def prepare_url(self, url, params):
         except UnicodeDecodeError:
             pass
 
+        # Don't do any URL preparation for oddball schemes
+        if ':' in url and not url.lower().startswith('http'):
+            self.url = url
+            return
+
         # Support for unicode domain names and paths.
         scheme, auth, host, port, path, query, fragment = parse_url(url)
 

test_requests.py

@@ -683,6 +683,18 @@ def test_autoset_header_values_are_native(self):
 
         assert p.headers['Content-Length'] == length
 
+    def test_oddball_schemes_dont_check_URLs(self):
+        test_urls = (
+            'data:image/gif;base64,R0lGODlhAQABAHAAACH5BAUAAAAALAAAAAABAAEAAAICRAEAOw==',
+            'file:///etc/passwd',
+            'magnet:?xt=urn:btih:be08f00302bc2d1d3cfa3af02024fa647a271431',
+        )
+        for test_url in test_urls:
+            req = requests.Request('GET', test_url)
+            preq = req.prepare()
+            assert test_url == preq.url
+
+
 class TestContentEncodingDetection(unittest.TestCase):
 
     def test_none(self):