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Further progress state of tlvdata

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Correct read to recv and add some more info that will be required.
This commit is contained in:
Jarrod Johnson 2013-11-02 13:05:58 -04:00
parent 35a5e9cbf0
commit 21ea762b46
1 changed files with 10 additions and 6 deletions
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16
confluent/common/tlvdata.py
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@ -9,10 +9,10 @@ def send_tlvdata(handle, data):
if tl < 16777216:
#type for string is '0', so we don't need
#to xor anything in
handle.write(struct.pack("!I", tl))
handle.sendall(struct.pack("!I", tl))
else:
raise Exception("String data length exceeds protocol")
handle.write(data)
handle.sendall(data)
handle.flush()
elif isinstance(data, dict): # JSON currently only goes to 4 bytes
sdata = json.dumps(data, separators=(',',':'))
@ -21,12 +21,12 @@ def send_tlvdata(handle, data):
raise Exception("JSON data exceeds protocol limits")
# xor in the type (0b1 << 24)
tl |= 16777216
handle.write(struct.pack("!I", tl))
handle.sendall(struct.pack("!I", tl))
handle.write(sdata)
handle.flush()
def recv_tlvdata(handle):
tl = handle.read(4)
tl = handle.recv(4)
tl = struct.unpack("!B", tl)[0]
if tl & 0b10000000:
raise Exception("Protocol Violation, reserved bit set")
@ -34,7 +34,11 @@ def recv_tlvdata(handle):
dlen = tl & 16777215 # 24 ones
type = (tl & 2130706432) >> 24 # 7 ones, followed by 24 zeroes
if type == 0:
return(handle.read(dlen))
data = handle.recv(dlen)
while len(data) < dlen:
ndata = handle.recv(dlen - len(data))
if not ndata:
raise Exception("Error reading data")
elif type == 1:
sdata = handle.read(dlen)
sdata = handle.recv(dlen)
return json.loads(sdata)