bitbake: hashserv: Add websocket connection implementation

Adds support to the hash equivalence client and server to communicate
over websockets. Since websockets are message orientated instead of
stream orientated, and new connection class is needed to handle them.

Note that websocket support does require the 3rd party websockets python
module be installed on the host, but it should not be required unless
websockets are actually being used.

(Bitbake rev: 56dd2fdbfb6350a9eef43a12aa529c8637887a7e)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/hashserv/__init__.py

@@ -9,11 +9,15 @@ import re
 import sqlite3
 import itertools
 import json
+from urllib.parse import urlparse
 
 UNIX_PREFIX = "unix://"
+WS_PREFIX = "ws://"
+WSS_PREFIX = "wss://"
 
 ADDR_TYPE_UNIX = 0
 ADDR_TYPE_TCP = 1
+ADDR_TYPE_WS = 2
 
 UNIHASH_TABLE_DEFINITION = (
     ("method", "TEXT NOT NULL", "UNIQUE"),
@@ -84,6 +88,8 @@ def setup_database(database, sync=True):
 def parse_address(addr):
     if addr.startswith(UNIX_PREFIX):
         return (ADDR_TYPE_UNIX, (addr[len(UNIX_PREFIX):],))
+    elif addr.startswith(WS_PREFIX) or addr.startswith(WSS_PREFIX):
+        return (ADDR_TYPE_WS, (addr,))
     else:
         m = re.match(r'\[(?P<host>[^\]]*)\]:(?P<port>\d+)$', addr)
         if m is not None:
@@ -103,6 +109,9 @@ def create_server(addr, dbname, *, sync=True, upstream=None, read_only=False):
     (typ, a) = parse_address(addr)
     if typ == ADDR_TYPE_UNIX:
         s.start_unix_server(*a)
+    elif typ == ADDR_TYPE_WS:
+        url = urlparse(a[0])
+        s.start_websocket_server(url.hostname, url.port)
     else:
         s.start_tcp_server(*a)
 
@@ -116,6 +125,8 @@ def create_client(addr):
     (typ, a) = parse_address(addr)
     if typ == ADDR_TYPE_UNIX:
         c.connect_unix(*a)
+    elif typ == ADDR_TYPE_WS:
+        c.connect_websocket(*a)
     else:
         c.connect_tcp(*a)
 
@@ -128,6 +139,8 @@ async def create_async_client(addr):
     (typ, a) = parse_address(addr)
     if typ == ADDR_TYPE_UNIX:
         await c.connect_unix(*a)
+    elif typ == ADDR_TYPE_WS:
+        await c.connect_websocket(*a)
     else:
         await c.connect_tcp(*a)