def helloDataToHelloFrame(helloData):
"""
Convert arbitrary JSON-decoded blob of objects into a L{HelloFrame}.
Raises L{InvalidHello} if there were errors in the blob of objects.
"""
if not isinstance(helloData, dict):
raise InvalidHello("helloData not a dict")
# simplejson without speedups will always give us unicode instead of str
# objects. (With speedups, it gives you a str when possible.)
for k, v in helloData.iteritems():
if isinstance(v, unicode):
try:
helloData[k] = v.encode('ascii')
except UnicodeEncodeError:
raise InvalidHello("could not encode value for key "
"%r to ascii; was %r" % (k, v))
obj = attrdict()
# sack is always optional.
if Hello_sack in helloData:
try:
sack = helloData[Hello_sack]
if not isinstance(sack, str):
raise TypeError
obj.sack = sackStringToSack(sack)
except (KeyError, TypeError, InvalidSackString):
raise InvalidHello("bad sack")
else:
obj.sack = None
try:
lastSackSeen = helloData[Hello_lastSackSeenByClient]
if not isinstance(lastSackSeen, str):
raise TypeError
obj.lastSackSeenByClient = sackStringToSack(lastSackSeen)
except (KeyError, TypeError, InvalidSackString):
raise InvalidHello("bad lastSackSeenByClient")
try:
# Any line here can raise KeyError; additional exceptions marked with 'e:'
# requestNewStream is always optional. If missing or False/0,
# transport is intended to attach to an existing stream.
obj.requestNewStream = ensureBool( # e: ValueError
helloData[Hello_requestNewStream]) if \
Hello_requestNewStream in helloData else False
obj.transportNumber = ensureNonNegIntLimit( # e: ValueError, TypeError
helloData[Hello_transportNumber], 2**53)
obj.protocolVersion = helloData[Hello_protocolVersion]
obj.streamingResponse = ensureBool( # e: ValueError
helloData[Hello_streamingResponse])
# Rules for streamId: must be 20-30 inclusive bytes, must not
# contain codepoints > 127
obj.streamId = helloData[Hello_streamId]
if not isinstance(obj.streamId, str) or not 20 <= len(obj.streamId) <= 30:
raise InvalidHello("bad streamId")
except (KeyError, TypeError, ValueError):
raise InvalidHello(
"problem with requestNewStream, transportNumber, "
"protocolVersion, streamingResponse, or streamId")
if obj.protocolVersion != 2:
raise InvalidHello("bad protocolVersion")
# Hello_succeedsTransport is always optional. If missing, the client does not
# want to get S2C strings over this transport. If None, the client does,
# but the transport does not succeed an existing primary transport. If a
# number, the transport might succeed an existing primary transport.
if Hello_succeedsTransport in helloData:
obj.succeedsTransport = helloData[Hello_succeedsTransport]
if obj.succeedsTransport is not None:
try:
obj.succeedsTransport = ensureNonNegIntLimit(
obj.succeedsTransport, 2**53)
except (TypeError, ValueError):
raise InvalidHello("bad succeedsTransport")
try:
obj.httpFormat = helloData[Hello_httpFormat]
if not obj.httpFormat in (FORMAT_XHR, FORMAT_HTMLFILE):
raise InvalidHello("bad httpFormat")
except KeyError:
obj.httpFormat = None
# needPaddingBytes is always optional. If missing, 0.
if Hello_needPaddingBytes in helloData:
try:
obj.needPaddingBytes = ensureNonNegIntLimit(
helloData[Hello_needPaddingBytes], 16*1024) # e: ValueError, TypeError
except (TypeError, ValueError):
raise InvalidHello("bad needPaddingBytes")
else:
obj.needPaddingBytes = 0
# maxReceiveBytes is optional. If missing, no limit.
try:
obj.maxReceiveBytes = ensureNonNegIntLimit(
helloData[Hello_maxReceiveBytes], 2**53) # e: ValueError, TypeError
except KeyError:
obj.maxReceiveBytes = 2**53
except (TypeError, ValueError):
raise InvalidHello("bad maxReceiveBytes")
# maxOpenTime is optional. If missing, no limit.
# Time is in seconds.
try:
obj.maxOpenTime = ensureNonNegIntLimit(
helloData[Hello_maxOpenTime], 2**53) # e: ValueError, TypeError
except KeyError:
obj.maxOpenTime = None
except (TypeError, ValueError):
raise InvalidHello("bad maxOpenTime")
# maxInactivity is required. If 0, no heartbeat.
# Time is in seconds.
try:
obj.maxInactivity = ensureNonNegIntLimit(
helloData[Hello_maxInactivity], 600) # e: ValueError, TypeError
except (KeyError, TypeError, ValueError):
raise InvalidHello("bad maxInactivity")
return HelloFrame(obj)
def test_False(self): for f in (0, 0.0, -0.0, False): self.assertIdentical(False, objcheck.ensureBool(f))
def test_ValueError(self):
for e in (-0.5, -1.00001, 1.0001, [], {}, set(), float('nan'), float('inf')):
self.assertRaises(ValueError, lambda: objcheck.ensureBool(e))
def test_True(self): for t in (1, 1.0, True): self.assertIdentical(True, objcheck.ensureBool(t))
