cookie_rewriter: catch CookieError and ignore erroring cookies

pywb/rewrite/cookie_rewriter.py

@@ -1,4 +1,4 @@
-import Cookie
+from Cookie import SimpleCookie, CookieError
 
 
 #=================================================================
@@ -11,10 +11,12 @@ class WbUrlCookieRewriter(object):
         self.url_rewriter = url_rewriter
 
     def rewrite(self, cookie_str, header='Set-Cookie'):
-        cookie = Cookie.SimpleCookie()
-        cookie.load(cookie_str)
-
         results = []
+        cookie = SimpleCookie()
+        try:
+            cookie.load(cookie_str)
+        except CookieError:
+            return results
 
         for name, morsel in cookie.iteritems():
             if morsel.get('domain'):

pywb/rewrite/test/test_cookie_rewriter.py

@@ -12,6 +12,10 @@ r"""
 >>> rewrite_cookie('abc=def; Path=file.html; Expires=Wed, 13 Jan 2021 22:23:01 GMT')
 [('Set-Cookie', 'abc=def; Path=/pywb/20131226101010/http://example.com/some/path/file.html')]
 
+# Cookie with invalid chars, not parsed
+>>> rewrite_cookie('abc@def=123')
+[]
+
 """