rewrite: pass wburl mod to rewritier, so that css/js rewriting

rules may override default content-type (in cases where it is incorrect)
allows for rule based cusomization (to be added later)

pywb/rewrite/rewrite_content.py

@@ -54,7 +54,7 @@ class RewriteContent:
 
     def rewrite_content(self, urlrewriter, headers, stream,
                         head_insert_func=None, urlkey='',
-                        sanitize_only=False, cdx=None):
+                        sanitize_only=False, cdx=None, mod=None):
 
         if sanitize_only:
             status_headers, stream = self.sanitize_content(headers, stream)
@@ -75,6 +75,14 @@ class RewriteContent:
         # special case -- need to ungzip the body
 
         text_type = rewritten_headers.text_type
+
+        # see known js/css modifier specified, the context should run
+        # default text_type
+        if mod == 'js_':
+            text_type = 'js'
+        elif mod == 'cs_':
+            text_type = 'css'
+
         stream_raw = False
         encoding = None
         first_buff = None

pywb/rewrite/rewrite_live.py

@@ -98,7 +98,8 @@ class LiveRewriter(object):
                       req_headers={},
                       timestamp=None,
                       follow_redirects=False,
-                      proxies=None):
+                      proxies=None,
+                      mod=None):
 
         ts_err = url.split('///')
 
@@ -135,7 +136,8 @@ class LiveRewriter(object):
                                   stream,
                                   head_insert_func=head_insert_func,
                                   urlkey=urlkey,
-                                  cdx=cdx))
+                                  cdx=cdx,
+                                  mod=mod))
 
         return result
 

pywb/webapp/replay_views.py

@@ -125,7 +125,8 @@ class ReplayView(object):
                                   head_insert_func=head_insert_func,
                                   urlkey=cdx['urlkey'],
                                   sanitize_only=wbrequest.wb_url.is_identity,
-                                  cdx=cdx))
+                                  cdx=cdx,
+                                  mod=wbrequest.wb_url.mod))
 
         (status_headers, response_iter, is_rewritten) = result