Add HTTP2 error code registry

Author: jdecuyper

hyper/http20/error_code_registry.py

@@ -0,0 +1,49 @@
+# -*- coding: utf-8 -*-
+"""
+hyper/http20/error_code_registry
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Global error code registry containing the established HTTP/2 error codes.
+The registry is based on a 32-bit space so we use the error code to index into
+the array.
+
+The current registry is available at:
+https://tools.ietf.org/html/draft-ietf-httpbis-http2-17#section-11.4
+"""
+
+NO_ERROR =            {'Name': 'NO_ERROR',
+                       'Description': 'Graceful shutdown'}
+PROTOCOL_ERROR =      {'Name': 'PROTOCOL_ERROR',
+                       'Description': 'Protocol error detected'}
+INTERNAL_ERROR =      {'Name': 'INTERNAL_ERROR',
+                       'Description': 'Implementation fault'}
+FLOW_CONTROL_ERROR =  {'Name': 'FLOW_CONTROL_ERROR',
+                       'Description': 'Flow control limits exceeded'}
+SETTINGS_TIMEOUT =    {'Name': 'SETTINGS_TIMEOUT',
+                       'Description': 'Settings not acknowledged'}
+STREAM_CLOSED =       {'Name': 'STREAM_CLOSED',
+                       'Description': 'Frame received for closed stream'}
+FRAME_SIZE_ERROR =    {'Name': 'FRAME_SIZE_ERROR',
+                       'Description': 'Frame size incorrect'}
+REFUSED_STREAM =      {'Name': 'REFUSED_STREAM ',
+                       'Description': 'Stream not processed'}
+CANCEL =              {'Name': 'CANCEL',
+                       'Description': 'Stream cancelled'}
+COMPRESSION_ERROR =   {'Name': 'COMPRESSION_ERROR',
+                       'Description': 'Compression state not updated'}
+CONNECT_ERROR =       {'Name': 'CONNECT_ERROR',
+                       'Description': 
+                       'TCP connection error for CONNECT method'}
+ENHANCE_YOUR_CALM =   {'Name': 'ENHANCE_YOUR_CALM',
+                       'Description': 'Processing capacity exceeded'}
+INADEQUATE_SECURITY = {'Name': 'INADEQUATE_SECURITY',
+                       'Description': 
+                       'Negotiated TLS parameters not acceptable'}
+HTTP_1_1_REQUIRED =   {'Name': 'HTTP_1_1_REQUIRED', 
+                       'Description': 'Use HTTP/1.1 for the request'}
+
+H2_ERROR_CODE_REGISTRY = [NO_ERROR, PROTOCOL_ERROR, INTERNAL_ERROR,
+                          FLOW_CONTROL_ERROR, SETTINGS_TIMEOUT, STREAM_CLOSED,
+                          FRAME_SIZE_ERROR, REFUSED_STREAM, CANCEL,
+                          COMPRESSION_ERROR, CONNECT_ERROR, ENHANCE_YOUR_CALM,
+                          INADEQUATE_SECURITY, HTTP_1_1_REQUIRED]