Initial python3 changes

Mostly just updating libraries, removing string encoding/decoding,
fixing some edge cases. No new functionality was added in this
commit.

lib/cherrypy/_cpwsgi_server.py

@@ -1,23 +1,55 @@
-"""WSGI server interface (see PEP 333). This adds some CP-specific bits to
-the framework-agnostic wsgiserver package.
+"""
+WSGI server interface (see PEP 333).
+
+This adds some CP-specific bits to the framework-agnostic cheroot package.
 """
 import sys
 
+import cheroot.wsgi
+import cheroot.server
+
 import cherrypy
-from cherrypy import wsgiserver
 
 
-class CPWSGIServer(wsgiserver.CherryPyWSGIServer):
+class CPWSGIHTTPRequest(cheroot.server.HTTPRequest):
+    """Wrapper for cheroot.server.HTTPRequest.
 
-    """Wrapper for wsgiserver.CherryPyWSGIServer.
-
-    wsgiserver has been designed to not reference CherryPy in any way,
-    so that it can be used in other frameworks and applications. Therefore,
-    we wrap it here, so we can set our own mount points from cherrypy.tree
-    and apply some attributes from config -> cherrypy.server -> wsgiserver.
+    This is a layer, which preserves URI parsing mode like it which was
+    before Cheroot v5.8.0.
     """
 
+    def __init__(self, server, conn):
+        """Initialize HTTP request container instance.
+
+        Args:
+            server (cheroot.server.HTTPServer):
+                web server object receiving this request
+            conn (cheroot.server.HTTPConnection):
+                HTTP connection object for this request
+        """
+        super(CPWSGIHTTPRequest, self).__init__(
+            server, conn, proxy_mode=True
+        )
+
+
+class CPWSGIServer(cheroot.wsgi.Server):
+    """Wrapper for cheroot.wsgi.Server.
+
+    cheroot has been designed to not reference CherryPy in any way,
+    so that it can be used in other frameworks and applications. Therefore,
+    we wrap it here, so we can set our own mount points from cherrypy.tree
+    and apply some attributes from config -> cherrypy.server -> wsgi.Server.
+    """
+
+    fmt = 'CherryPy/{cherrypy.__version__} {cheroot.wsgi.Server.version}'
+    version = fmt.format(**globals())
+
     def __init__(self, server_adapter=cherrypy.server):
+        """Initialize CPWSGIServer instance.
+
+        Args:
+            server_adapter (cherrypy._cpserver.Server): ...
+        """
         self.server_adapter = server_adapter
         self.max_request_header_size = (
             self.server_adapter.max_request_header_size or 0
@@ -31,17 +63,22 @@ class CPWSGIServer(wsgiserver.CherryPyWSGIServer):
                        None)
 
         self.wsgi_version = self.server_adapter.wsgi_version
-        s = wsgiserver.CherryPyWSGIServer
-        s.__init__(self, server_adapter.bind_addr, cherrypy.tree,
-                   self.server_adapter.thread_pool,
-                   server_name,
-                   max=self.server_adapter.thread_pool_max,
-                   request_queue_size=self.server_adapter.socket_queue_size,
-                   timeout=self.server_adapter.socket_timeout,
-                   shutdown_timeout=self.server_adapter.shutdown_timeout,
-                   accepted_queue_size=self.server_adapter.accepted_queue_size,
-                   accepted_queue_timeout=self.server_adapter.accepted_queue_timeout,
-                   )
+
+        super(CPWSGIServer, self).__init__(
+            server_adapter.bind_addr, cherrypy.tree,
+            self.server_adapter.thread_pool,
+            server_name,
+            max=self.server_adapter.thread_pool_max,
+            request_queue_size=self.server_adapter.socket_queue_size,
+            timeout=self.server_adapter.socket_timeout,
+            shutdown_timeout=self.server_adapter.shutdown_timeout,
+            accepted_queue_size=self.server_adapter.accepted_queue_size,
+            accepted_queue_timeout=self.server_adapter.accepted_queue_timeout,
+            peercreds_enabled=self.server_adapter.peercreds,
+            peercreds_resolve_enabled=self.server_adapter.peercreds_resolve,
+        )
+        self.ConnectionClass.RequestHandlerClass = CPWSGIHTTPRequest
+
         self.protocol = self.server_adapter.protocol_version
         self.nodelay = self.server_adapter.nodelay
 
@@ -50,21 +87,24 @@ class CPWSGIServer(wsgiserver.CherryPyWSGIServer):
         else:
             ssl_module = self.server_adapter.ssl_module or 'pyopenssl'
         if self.server_adapter.ssl_context:
-            adapter_class = wsgiserver.get_ssl_adapter_class(ssl_module)
+            adapter_class = cheroot.server.get_ssl_adapter_class(ssl_module)
             self.ssl_adapter = adapter_class(
                 self.server_adapter.ssl_certificate,
                 self.server_adapter.ssl_private_key,
-                self.server_adapter.ssl_certificate_chain)
+                self.server_adapter.ssl_certificate_chain,
+                self.server_adapter.ssl_ciphers)
             self.ssl_adapter.context = self.server_adapter.ssl_context
         elif self.server_adapter.ssl_certificate:
-            adapter_class = wsgiserver.get_ssl_adapter_class(ssl_module)
+            adapter_class = cheroot.server.get_ssl_adapter_class(ssl_module)
             self.ssl_adapter = adapter_class(
                 self.server_adapter.ssl_certificate,
                 self.server_adapter.ssl_private_key,
-                self.server_adapter.ssl_certificate_chain)
+                self.server_adapter.ssl_certificate_chain,
+                self.server_adapter.ssl_ciphers)
 
         self.stats['Enabled'] = getattr(
             self.server_adapter, 'statistics', False)
 
-    def error_log(self, msg="", level=20, traceback=False):
+    def error_log(self, msg='', level=20, traceback=False):
+        """Write given message to the error log."""
         cherrypy.engine.log(msg, level, traceback)