chat_pb2.py

# Generated by the protocol buffer compiler.  DO NOT EDIT!
# source: chat.proto

import sys
_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
from google.protobuf import descriptor as _descriptor
from google.protobuf import message as _message
from google.protobuf import reflection as _reflection
from google.protobuf import symbol_database as _symbol_database
from google.protobuf import descriptor_pb2
# @@protoc_insertion_point(imports)

_sym_db = _symbol_database.Default()




DESCRIPTOR = _descriptor.FileDescriptor(
  name='chat.proto',
  package='',
  syntax='proto3',
  serialized_pb=_b('\n\nchat.proto\".\n\x0b\x43hatMessage\x12\x11\n\ttimestamp\x18\x01 \x01(\x05\x12\x0c\n\x04text\x18\x02 \x01(\tb\x06proto3')
)
_sym_db.RegisterFileDescriptor(DESCRIPTOR)




_CHATMESSAGE = _descriptor.Descriptor(
  name='ChatMessage',
  full_name='ChatMessage',
  filename=None,
  file=DESCRIPTOR,
  containing_type=None,
  fields=[
    _descriptor.FieldDescriptor(
      name='timestamp', full_name='ChatMessage.timestamp', index=0,
      number=1, type=5, cpp_type=1, label=1,
      has_default_value=False, default_value=0,
      message_type=None, enum_type=None, containing_type=None,
      is_extension=False, extension_scope=None,
      options=None),
    _descriptor.FieldDescriptor(
      name='text', full_name='ChatMessage.text', index=1,
      number=2, type=9, cpp_type=9, label=1,
      has_default_value=False, default_value=_b("").decode('utf-8'),
      message_type=None, enum_type=None, containing_type=None,
      is_extension=False, extension_scope=None,
      options=None),
  ],
  extensions=[
  ],
  nested_types=[],
  enum_types=[
  ],
  options=None,
  is_extendable=False,
  syntax='proto3',
  extension_ranges=[],
  oneofs=[
  ],
  serialized_start=14,
  serialized_end=60,
)

DESCRIPTOR.message_types_by_name['ChatMessage'] = _CHATMESSAGE

ChatMessage = _reflection.GeneratedProtocolMessageType('ChatMessage', (_message.Message,), dict(
  DESCRIPTOR = _CHATMESSAGE,
  __module__ = 'chat_pb2'
  # @@protoc_insertion_point(class_scope:ChatMessage)
  ))
_sym_db.RegisterMessage(ChatMessage)


# @@protoc_insertion_point(module_scope)

main.py

#!/usr/bin/env python

from chat_pb2 import ChatMessage
import time
import struct

def main():
    
    print repr(pack_message("Hello!"))

def pack_message(text):
    # create protocol buffer and insert data
    msg = ChatMessage()
    msg.timestamp = int(time.time())
    msg.text = text

    # serialize it
    data = msg.SerializeToString()
    header = struct.pack('!H', len(data)) # length as two-byte unsigned short in network byte order
    
    return header+data

if __name__ == '__main__': main()