Enhance default session with host-specific options

This makes much more sense then building custom sessions inside specific
modules.

dosagelib/http.py

@@ -31,7 +31,7 @@ class Session(requests.Session):
     longer delays.
     """
     def __init__(self):
-        super(Session, self).__init__()
+        super().__init__()
 
         retry = Retry(MaxRetries, backoff_factor=RetryBackoffFactor)
         self.mount('http://', HTTPAdapter(max_retries=retry))
@@ -39,6 +39,7 @@ class Session(requests.Session):
         self.headers.update({'User-Agent': UserAgent})
 
         self.throttles = collections.defaultdict(lambda: RandomThrottle())
+        self.host_options = {}
 
     def send(self, request, **kwargs):
         if 'timeout' not in kwargs:
@@ -46,6 +47,8 @@ class Session(requests.Session):
 
         hostname = urlparse(request.url).hostname
         self.throttles[hostname].delay()
+        if hostname in self.host_options:
+            kwargs.update(self.host_options[hostname])
 
         return super(Session, self).send(request, **kwargs)
 
@@ -54,6 +57,11 @@ class Session(requests.Session):
         """
         self.throttles[hostname] = RandomThrottle(th_min, th_max)
 
+    def add_host_options(self, hostname, options):
+        """Adds custom options for a specific host: Might overwrite the existing one.
+        """
+        self.host_options[hostname] = options
+
 
 class RandomThrottle(object):
     def __init__(self, th_min=0.0, th_max=0.3):

dosagelib/plugins/comicskingdom.py

@@ -3,15 +3,10 @@
 # Copyright (C) 2019 Thomas W. Littauer
 import re
 
-try:
-    from functools import cached_property
-except ImportError:
-    from cached_property import cached_property
 from importlib.resources import path as get_path
 
 from ..scraper import _BasicScraper
 from ..helpers import bounceStarter, joinPathPartsNamer
-from ..http import Session
 
 
 class ComicsKingdom(_BasicScraper):
@@ -22,21 +17,19 @@ class ComicsKingdom(_BasicScraper):
     namer = joinPathPartsNamer((-2, -1), ())
     help = 'Index format: yyyy-mm-dd'
 
-    @cached_property
-    def session(self):
-        '''Use our own isolated session (ComicsKingdom screws up their TLS setup
-        from time to time, this should "fix" it)'''
-        s = Session()
-        # slightly iffy hack taken from certifi
-        self.cert_ctx = get_path("dosagelib.data", "godaddy-bundle-g2-2031.pem")
-        s.verify = str(self.cert_ctx.__enter__())
-        return s
-
     def __init__(self, name, path):
         super(ComicsKingdom, self).__init__('ComicsKingdom/' + name)
         self.url = 'https://comicskingdom.com/' + path
         self.stripUrl = self.url + '/%s'
 
+        # slightly iffy hack taken from certifi
+        # We need or own certificate bundle since ComicsKingdom screws up their
+        # TLS setup from time to time, this should "fix" it)
+        self.cert_ctx = get_path('dosagelib.data', 'godaddy-bundle-g2-2031.pem')
+        self.session.add_host_options('comicskingdom.com', {
+            'verify': str(self.cert_ctx.__enter__()),
+        })
+
     def link_modifier(self, url, tourl):
         if self.url not in tourl:
             tourl = self.url + '/' + tourl.rsplit("/", 1)[1]