Composte

Get together to make bad music

To our beloved professor: Before you print out every single line of python source code in this repository, please run the following command before committing to your decision.

find . -name '*.py' | xargs wc -l

We apologize in advance. We also wish to offer our condolences to you, the course staff, and the trees who gave their lives so that this code may be briefly read.

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For even worse documentation, see docs.

Getting Composte

In general, you can fetch the latest stable version from here:

git clone https://github.com/AlexisGoodfellow/Composte.git

Occasionally, you may find that the server you are connecting to uses a different version, and you will have to obtain a client of that version. One of these days we'll figure out how you can do that.

Building and Running

Composte is aimed at *NIX systems. If you are running Windows and manage to get a server or client running, please tell us how you did it!

The Composte client and server provided here are python3 applications and do not require compilation. However, the use of a virtual environment such as virtualenv or venv is recommended.

General setup:

There are a number of non-python dependencies for clients that we recommend you satisfy before satisfying the python dependencies. If you only plan on running the Composte server, these packages are not required.

timidity
timidity-interfaces-extra
freepats

Composte has a number of python dependencies, listed in requirements.txt.

pip install -r requirements.txt

If you will be relying on systemwide packages, refer to requirements.txt for a list of python packages that are required.

In general, you shouldn't be starting Composte servers manually outside of testing or demos. It is recommended that you run it as a service using a supervisor of your choice.

By default, Composte servers listen on port 5000 and send outgoing traffic on ports 5000 and 5001. If you are running from behind a firewall, make sure that these ports or the ones you choose to use are not filtered.

To start a Composte server:

./ComposteServer.py

The server accepts arguments to control which ports it uses. The broadcast port only sees outgoing traffic, while the interactive port sees both incoming and outgoing traffic.

To start a Composte client:

./ComposteClient.py [-r Remote-address]

The most commonly used option to ComposteClient is -r Remote-address, the remote address where the server you want to connect to is listening.

Docker

We also provide a Dockerfile describing a container that runs a Composte Server. The container listens on port 5000 and 5001.

The following is a reiteration of what was required to successfully run the container with output persistence in our development environment. We may be wrong in the general case.

If you wish to retain logs, you must mount a directory to /=\ /usr/src/app/logs. If you wish to retain projects, user, etc, you must mount a directory to /=\ /usr/src/app/data.

A one-time, standalone invocation of the container might look like this:

docker build -t composte-server .
docker run -p 0.0.0.0:5000:5001 -p 0.0.0.0:5001:5001 \
-v $(pwd)/logs:/=\ /usr/src/logs -v $(pwd)/data:/=\ /usr/src/data \
composte-server

Clients are run as usual in this case.

Source Code Tourist's Guide

For your viewing pleasure or displeasure, we provide an elided tree of the repository.

Skip

Composte
├── auth
│   └── auth.py
├── client
│   └── < GUI Suffering >
├── ComposteClient.py
├── ComposteServer.py
├── data
│   ├── composte.db
│   └── users
│       └── < User data >
├── database
│   └── driver.py
├── demoScripts
│   └── < Demonstration scripts >
├── doc
│   ├── architecture
│   │   └── index.md
│   ├── deliverables
│   │   └── index.md
│   ├── images
│   │   └── Bad_Diagrams
│   │       └── < "Diagrams" >
│   ├── index.md
│   └── protocol
│       └── index.md
├── Dockerfile
├── html
│   ├── index.html
│   └── styles
│       └── composte.css
├── logs
│   └── < Logs >
├── network
│   ├── base
│   │   ├── exceptions.py
│   │   ├── handler.py
│   │   └── loggable.py
│   ├── client.py
│   ├── conf
│   │   ├── logging.conf
│   │   └── logging.py
│   ├── dns.py
│   ├── fake
│   │   └── security.py
│   └── server.py
├── protocol
│   ├── base
│   │   └── exceptions.py
│   ├── client.py
│   └── server.py
├── README.md
├── requirements.txt
└── util
    ├── bookkeeping.py
    ├── classExceptions.py
    ├── composteProject.py
    ├── misc.py
    ├── musicFuns.py
    ├── musicWrapper.py
    ├── repl.py
    └── timer.py

Source Descriptions

Top Level

ComposteServer.py implements a complete Composte server on top of the network server.

ComposteClient.py implements most of a Composte client on top of the network client.

auth

auth.py contains functions to create and verify password hashes.

database

driver.py encapsulates access to the the database. It translates between database schemas and python objects.

network

client.py provides a network client.

server.py provides a network server.

dns.py provides methods to get ip addresses from domain names.

network/base

exceptions.py contains exceptions the network clients and servers expect users to raise in the event of trouble.

handler.py provides a base class for a stateful message handler. Users may choose to derive their message handlers from this.

loggable.py provides a base class to provide simpler logging.

network/fake

security.py provides classes conforming to the encryption_scheme interface that the network servers and clients expect, but provide no encryption.

network/conf

logging.py contains the default logging configuration that the network clients and servers use, as well as a method to read that configuration.

client

This module contains the GUI.

doc

This directory contains documentation of the project and deliverables for COMP 50CP. Much of the documentation is out of date, and a fair amount may also be unreachable from internal links.

protocol

client.py contains methods for serializing and deserializing client messages.

server.py contains methods for serializing and deserializing server messages.

protocol/base

exceptions.py contains exceptions that the protocol module may raise.

util

The util module implements a number of miscellaneous things that are needed to make the server work. Notably, the music backend is implemented here

bookkeeping.py implements two static object pools.

classExceptions.py provides some exceptions used in the class hierarchy used by the GUI.

composteProject.py provides the internal, in-memory representation of a project. This also provides serialization and deserialization facilities.

misc.py provides a function to get the version (commit) hash.

musicFuns.py provides the mutators for the internal representation of music.

musicWrapper.py provides a thin wrapper around musicFuns.py, conforming to the message handler contracts that ComposteServer expects.

timer.py provides a method to run a function at a configurably approximate interval.

repl.py provides the REPL shell/scripting interface that Composte has decomposed into. The REPL is likely to have access to all methods that the GUI exposes to the user, and indeed may have finer-grained access to music manipulation methods. The REPL is feature-impoverished, but capable of just enough to be semi-useful.