happypandax-client

A python client library for communicating with HappyPanda X servers

Installing

Install and update using pip

$ pip3 install happypandax-client

Example

Get up and running fast:

import happypandax_client as hpxclient
from pprint import pprint

c = hpxclient.Client("my-client")
c.connect(host="localhost", port=7007)

c.handshake(user = None, password = None)
d = c.send([{"fname": "get_version"}])
pprint(d)

API

Client (name, host="localhost", port=7007, session_id="", ssl_context=None, timeout=60) → A Client instance

A client for communicating with a HappyPanda X server.

Args:

• name: name of client
• host: HPX server host
• port: HPX server host
• session_id: if provided, this will be the session id used in messages
• ssl_context: see ssl.create_default_context
• timeout: see socket.settimeout

Client.host (property) → str

Set or return the HPX server host

Client.port (property) → int

Set or return the HPX server port

Client.accepted (property) → bool

Whether this client has been authenticated or not (this value will only be available after connecting)

Client.version (property) → dict

The version message returned from the HPX server (this value will only be available after connecting)

Client.guest_allowed (property) → bool

Whether guests are allowed on the connected HPX server (this value will only be available after connecting)

Client.ready () → bool

Whether this client is ready to exchange messages with the HPX server

Client.alive () → bool

Whether the connection is still alive

Client.connect (self, host=None, port=None) → bool

Connect to HPX server

Args:

• host: HPX server host, if set to None the provided host on instantiation will be used
• port: HPX server port, if set to None the provided port on instantiation will be used

Client.handshake (self, user=None, password=None, ignore_err=False, _data={}) → bool

Perfom a handshake with the HPX server

Args:

• user: username
• password: password
• ignore_err: don't raise any errors

Client.request_handshake (self, user=False, password=False, ignore_err=False) → bool

Basically a re-login

Args:

• user: username, if set to False the previously provided username will be used
• password: password, if set to False the previously provided password will be used
• ignore_err: don't raise any errors

Client.send_bytes (self, data, raise_on_auth=True) → bytes

Send bytedata to server. Receive bytedata from server.

Args:

• data: bytes data to send to server
• raise_on_auth: raise an error if client is not authenticated

Client.send_raw (self, data, raise_on_auth=True, encoding='utf-8') → dict

Send json-compatible dict to server. Receive json-compatible from server.

Note that this method will not add anything to your message and expects you to add the name and session yourself. See the finalize function.

Args:

• data: data to send to server, this is a dict
• raise_on_auth: raise an error if client is not authenticated
• encoding: bytes encoding, there shouldn't be a reason to change this

Client.send (self, data, raise_on_auth=True, encoding='utf-8') → dict

Like Client.send_raw, but as a convenience, this method will wrap your message into the required message structure HPX expects and automatically sets the session and name:

final_msg = {
        'session': client.session_id,
        'name': client.name,
        'data': data, # <--- your message is put here
    }

Args:

• data: data to send to server, this is usually a list of dicts
• raise_on_auth: raise an error if client is not authenticated
• encoding: bytes encoding, there shouldn't be a reason to change this

Client.close () → None

Close connection with server. Note that it won't be possible to connect again after the connection has been closed.

finalize (name, data, session_id="") → dict

A helper function that will wrap your message up like this:

msg = {
        'session': session_id,
        'name': name,
        'data': data, # <--- your message is put here
    }

Args:

• name: name of client
• data: data to send to server, this is usually a list of dicts
• session_id: session id

---

These are all the exceptions that can be raised by the client:

ClientError(Exception)

Base client exception, all client exceptions will derive from this

ConnectionError(ClientError, ConnectionError)

Server connection error

ServerDisconnectError(ConnectionError, ConnectionAbortedError)

Server disconnected

AuthError(ClientError)

Auth Base Error

AuthRequiredError(AuthError)

AuthWrongCredentialsError(AuthError)

AuthMissingCredentials(AuthError)

JSONParseError(ClientError)

Extra

Using a different json library

It must support being used as a drop-in replacement for the standard json module

import happypandax_client as hpxclient
import ujson
hpxclient.client.json = ujson