qutebrowser: Add URL rewriting for scribe redirects

Scribe links are often not redirected correctly if belonging to medium's
'global-identity' redirections. This is a first attempt at fixing those
by removing the superfluous string from the scribe URL.

Generalized enough to work as a 'post-processing' function for the
redirection plugin, which can be set up by pointing the 'postprocess'
key of a page entry to a callable object (most likely a function).

qutebrowser/.config/qutebrowser/redirects.py

@@ -2,6 +2,17 @@ import random
 import re
 from qutebrowser.api import interceptor
 from qutebrowser.extensions.interceptors import RedirectException
+from qutebrowser.utils import message
+
+def fixScribePath(url):
+    """ Fix external medium blog to scribe translation.
+    Some paths from medium will go through a 'global identity'
+    path which messes up the actual url path we want to go
+    to and puts it in queries. This puts it back on the path.
+    """
+    new_path = f"{url.path()}{url.query()}"
+    url.setQuery("")
+    url.setPath(re.sub(r"m/global-identity-2redirectUrl=", "", new_path))
 
 redirects = {
     "youtube": {
@@ -132,13 +143,11 @@ redirects = {
             "rimgo.bcow.xyz",
             "rimgo.pussthecat.org",
             "rimgo.totaldarkness.net",
-            "rimgo.bus-hit.me",
             "rimgo.esmailelbob.xyz",
             "imgur.artemislena.eu",
             "rimgo.vern.cc",
             "rim.odyssey346.dev",
             "rimgo.privacytools.io",
-            "i.habedieeh.re",
             "rimgo.hostux.net",
             "ri.zzls.xyz",
             "rimgo.marcopisco.com",
@@ -157,6 +166,7 @@ redirects = {
             "scribe.privacydev.net",
             "sc.vern.cc",
         ],
+        "postprocess": fixScribePath
     },
     "google": {
         "source": ["google.com"],
@@ -172,7 +182,6 @@ redirects = {
             "wiki.slipfox.xyz",
             "wikiless.esmailelbob.xyz",
             "wikiless.funami.tech",
-            "wikiless.northboot.xyz",
             "wikiless.org",
             "wikiless.tiekoetter.com",
         ],
@@ -204,10 +213,12 @@ def rewrite(request: interceptor.Request):
         if matched:
             target = service["target"][random.randint(0, len(service["target"]) - 1)]
             if target is not None and url.setHost(target) is not False:
+                if "postprocess" in service:
+                    service["postprocess"](url)
                 try:
                     request.redirect(url)
-                except RedirectException:
+                except RedirectException as e:
-                    pass
+                    message.error(str(e))
                 break