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Convert parse_websocket_frame to a generator

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This commit is contained in:
Aldo Cortesi 2015-06-08 10:58:12 +12:00
parent df962f8e7b
commit 7dff8f0dca
4 changed files with 34 additions and 19 deletions
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7
libpathod/language/__init__.py
View File

@ -63,12 +63,15 @@ def parse_websocket_frame(s):
May raise ParseException
"""
try:
return websockets.WebsocketFrame.expr().parseString(
reqs = pp.OneOrMore(
websockets.WebsocketFrame.expr()
).parseString(
s,
parseAll = True
)[0]
)
except pp.ParseException as v:
raise exceptions.ParseException(v.msg, v.line, v.col)
return itertools.chain(*[expand(i) for i in reqs])
def serve(msg, fp, settings):

1
libpathod/language/websockets.py
View File

@ -69,6 +69,7 @@ class Length(base.Integer):
class Times(base.Integer):
preamble = "x"
COMPONENTS = (
OpCode,
Length,

21
libpathod/pathod.py
View File

@ -131,16 +131,17 @@ class PathodHandler(tcp.BaseHandler):
if frm.payload.startswith(ld):
nest = frm.payload[len(ld):]
try:
wf = language.parse_websocket_frame(nest)
wf_gen = language.parse_websocket_frame(nest)
except language.exceptions.ParseException, v:
lg(
"Parse error in reflected frame specifcation:"
" %s" % v.msg
)
break
for frm in wf_gen:
with log.Log(self.logfp, self.server.hexdump, lr, lw) as lg:
frame_log = language.serve(
wf,
frm,
self.wfile,
self.settings
)
@ -280,32 +281,32 @@ class PathodHandler(tcp.BaseHandler):
# If this is a websocket initiation, we respond with a proper
# server response, unless over-ridden.
if websocket_key:
anchor_spec = language.parse_pathod("ws")
anchor_gen = language.parse_pathod("ws")
else:
anchor_spec = None
anchor_gen = None
for i in self.server.anchors:
if i[0].match(path):
anchor_spec = i[1]
anchor_gen = i[1]
break
else:
if m(self.server.craftanchor.match(path)):
spec = urllib.unquote(path)[len(m.v.group()):]
if spec:
try:
anchor_spec = language.parse_pathod(spec)
anchor_gen = language.parse_pathod(spec)
except language.ParseException as v:
lg("Parse error: %s" % v.msg)
anchor_spec = iter([language.http.make_error_response(
anchor_gen = iter([language.http.make_error_response(
"Parse Error",
"Error parsing response spec: %s\n" % (
v.msg + v.marked()
)
)])
if anchor_spec:
lg("crafting spec: %s" % anchor_spec)
if anchor_gen:
lg("crafting spec: %s" % anchor_gen)
nexthandler, retlog["response"] = self.http_serve_crafted(
anchor_spec.next()
anchor_gen.next()
)
if nexthandler and websocket_key:
return self.handle_websocket, retlog

10
test/test_language_websocket.py
View File

@ -36,9 +36,19 @@ class TestWebsocketFrame:
"wf:fin:rsv1:rsv2:rsv3:mask",
"wf:-fin:-rsv1:-rsv2:-rsv3:-mask",
"wf:k@4",
"wf:x10",
]
self._test_messages(specs, websockets.WebsocketFrame)
def test_parse_websocket_frames(self):
wf = language.parse_websocket_frame("wf:x10")
assert len(list(wf)) == 10
tutils.raises(
language.ParseException,
language.parse_websocket_frame,
"wf:x"
)
def test_client_values(self):
specs = [
"wf:f'wf'",