Fusion Framework Library

Introduction

This framework allows to develop new services based on generic basic blocs. It was created to ease maintainance of a modular ecosystem of cybersecurity services.

Tip

This documentation does not aim for completeness but provides some keywords to grep to quickly locate the code which could answer the questions you may have.

Structure

The framework is divided in four modules listed in the following table.

Module	Description
client	Contains classes to build client applications to interact with server applications
concept	Contains concepts common to all services
helper	Contains helpers to ease implementation of several tasks
server	Contains classes to build server applications

Concept

In Fusion Framework, Concept is the interface for most objects shared between servers and clients. It implements serialization and deserialization methods allowing transparent conversion to and from JSON.

There are many subclasses of Concept, some are defined in this library as they are applicable to most client/server use-cases. Services can also derive Concept class to implement service-specific objects needed to exchange data between server and client.

Server

Most important classes are listed in the following table.

Class	Description
FusionAuthBackend	Subclasses of this class perform authentication against different identity providers
FusionAuthAPI	Implements authentication API for the server
FusionCaseAPI	Implements case management API for the server
FusionConstantAPI	Implements hot-reload config API for the server
FusionDownloadAPI	Implements file download API for the server
FusionEventAPI	Implements SSE and webhook APIs for the server
FusionInfoAPI	Implements server information API

Other important classes are located in these modules.

Module	Description
config	Configuration classes
storage	Data storage classes
synchronizer	Synchronizer classes

Client

Most important classes are listed in the following table.

Class	Description
FusionClient	Provides a generic client to handle communication with server mostly based on Concept subclasses
FusionAuthAPIClient	Implements client for authentication API
FusionCaseAPIClient	Implements client for case management API
FusionConstantAPIClient	Implements client for hot-reload config API
FusionDownloadAPIClient	Implements client for file download API
FusionEventAPIClient	Implements client for SSE and webhook APIs
FusionInfoAPIClient	Implements client for information API

Helper

Most important helpers are listed in the following table.

Module	Description
aiohttp	Implements helpers for aiohttp operations across services
config	Implements ConfigError and load_ssl_config helper
datetime	Implements datetime serialization and deserialization
filesystem	Implements helpers for filesystem operations across services
flock	Implements file-based asynchronous locking
logging	Implements logging helpers
notifier	Implements FusionNotifier used for webhook notifications
pubsub	Implements publisher/subscriber notification queues (best effort)
serializing	Implements serialization (Dumpable) and deserialization (Loadable)
streaming	Implements data streaming operations across services
subprocess	Implements subprocess operations across services
timer	Implements Timer
tracing	Implements trace_user_op used to trace user operations across services
zip	Implements archive creation (create_zip) and extraction (extract_zip)