Merge pull request #198 from Kami/add_css_view

Add CSS view which beautifies minified CSS files

libmproxy/console/contentview.py

@@ -1,3 +1,4 @@
+import logging
 import re, cStringIO, traceback, json
 import urwid
 
@@ -19,6 +20,18 @@ try:
 except ImportError: # pragma nocover
     pyamf = None
 
+try:
+    import cssutils
+except ImportError: # pragma nocover
+    cssutils = None
+else:
+    cssutils.log.setLevel(logging.CRITICAL)
+
+    cssutils.ser.prefs.keepComments = True
+    cssutils.ser.prefs.omitLastSemicolon = False
+    cssutils.ser.prefs.indentClosingBrace = False
+    cssutils.ser.prefs.validOnly = False
+
 VIEW_CUTOFF = 1024*50
 
 
@@ -318,7 +331,23 @@ class ViewJavaScript:
         opts = jsbeautifier.default_options()
         opts.indent_size = 2
         res = jsbeautifier.beautify(content[:limit], opts)
-        return "JavaScript", _view_text(res, len(content), limit)
+        return "JavaScript", _view_text(res, len(res), limit)
+
+class ViewCSS:
+    name = "CSS"
+    prompt = ("css", "c")
+    content_types = [
+        "text/css"
+    ]
+
+    def __call__(self, hdrs, content, limit):
+        if cssutils:
+            sheet = cssutils.parseString(content)
+            beautified = sheet.cssText
+        else:
+            beautified = content
+
+        return "CSS", _view_text(beautified, len(beautified), limit)
 
 
 class ViewImage:
@@ -409,6 +438,7 @@ views = [
     ViewHTML(),
     ViewHTMLOutline(),
     ViewJavaScript(),
+    ViewCSS(),
     ViewURLEncoded(),
     ViewMultipart(),
     ViewImage(),

libmproxy/console/help.py

@@ -61,6 +61,10 @@ class HelpView(urwid.ListBox):
                     common.highlight_key("json", "s") +
                     [("text", ": JSON")]
                 ),
+                (None,
+                    common.highlight_key("css", "c") +
+                    [("text", ": CSS")]
+                ),
                 (None,
                     common.highlight_key("urlencoded", "u") +
                     [("text", ": URL-encoded data")]

requirements.txt

@@ -13,4 +13,5 @@ pyasn1>=0.1.7
 requests>=1.2.2
 urwid>=1.1.1
 wsgiref>=0.1.2
-jsbeautifier>=1.4.0
+jsbeautifier>=1.4.0
+cssutils>=1.0,<1.1

test/data/1.css

@@ -0,0 +1 @@
+body,html{height:100%}body{font-family:'Open Sans',sans-serif;font-size:1.5em;padding-top:80px}

test/test_console_contentview.py

@@ -13,6 +13,11 @@ try:
 except ImportError:
     pyamf = None
 
+try:
+    import cssutils
+except:
+    cssutils = None
+
 
 class TestContentView:
     def test_trailer(self):
@@ -112,6 +117,26 @@ class TestContentView:
         assert v([], "[1, 2, 3", 100)
         assert v([], "function(a){[1, 2, 3]}", 100)
 
+    def test_view_css(self):
+        v = cv.ViewCSS()
+
+        with open('./test/data/1.css', 'r') as fp:
+            fixture_1 = fp.read()
+
+        result = v([], 'a', 100)
+
+        if cssutils:
+            assert len(result[1]) == 0
+        else:
+            assert len(result[1]) == 1
+
+        result = v([], fixture_1, 100)
+
+        if cssutils:
+            assert len(result[1]) > 1
+        else:
+            assert len(result[1]) == 1
+
     def test_view_hex(self):
         v = cv.ViewHex()
         assert v([], "foo", 1000)