et

et

Sending and receiving arbitrary data via UDP

This package implements a lightweight, pure-Python client and server pair that sends and receives simple Python structures via UDP. The original motivation is to enable a package to send "phone home" messages.

The default encoding is zlib-compressed json. (pickle is not used out of security concerns [example].)

Example

make devready

In one shell, type:

$ python et/server.py
INFO:__main__:Listening on localhost:2233

In another shell, type:

$ python ./et/client.py 

(There is no output from the client)

In the server window, you should see messages like:

INFO:__main__:Received 4 bytes from ('127.0.0.1', 47750) in format 1

INFO:__main__:Received 12 bytes from ('127.0.0.1', 59498) in format 2

INFO:__main__:Received 18 bytes from ('127.0.0.1', 42396) in format 1
{'test': 'data'}
INFO:__main__:Received 26 bytes from ('127.0.0.1', 42598) in format 2
{'test': 'data'}
INFO:__main__:Received 122 bytes from ('127.0.0.1', 57842) in format 1
{'version': '1.2.3rc4', 'sys.version_info': [3, 5, 2, 'final', 0], 'sys.platform': 'linux', 'local_ip': '172.18.20.148'}
INFO:__main__:Received 108 bytes from ('127.0.0.1', 44319) in format 2
{'version': '1.2.3rc4', 'sys.version_info': [3, 5, 2, 'final', 0], 'sys.platform': 'linux', 'local_ip': '172.18.20.148'}

Format 1 is json; format 2 is compressed json.