aio-lanraragi 0.1.9

An asynchronous Python API client for LANraragi, written with aiohttp and pydantic for type validation.

aio-lanraragi

An asynchronous Python API client for LANraragi, written with aiohttp and pydantic for type validation. The project is a work in progress (and subject to potential breaking changes on minor version).

Installation with pip:

pip install aio-lanraragi

Or, to install a nightly version:

pip install git+https://github.com/psilabs-dev/aio-lanraragi.git@$branch_name

For development documentation, see development. For integration testing documentation, see integration tests README.

Usage

Here is an example on getting all archives from LANraragi using LRRClient's context management:

import asyncio
from lanraragi import LRRClient

async def main():
    async with LRRClient("http://localhost:3000", lrr_api_key="lanraragi") as lrr:
        response, err = await lrr.archive_api.get_all_archives()
        if err:
            raise Exception(f"Encountered error while getting all archives: {err.error}")
        for archive in response.data:
            print(archive.arcid)

if __name__ == "__main__":
    asyncio.run(main())

"aio-lanraragi" uses a (response, error) approach to error handling.

Here is a code snippet on making concurrent API calls under a bounded semaphore.

...
async with LRRClient("http://localhost:3000", lrr_api_key="lanraragi") as lrr:
    semaphore = asyncio.BoundedSemaphore(value=4)
    tasks = []
    for req in requests:
        tasks.append(asyncio.create_task(async_task(lrr, req, semaphore)))
    await asyncio.gather(*tasks)

Since aiohttp is used under the hood, you may install optional libraries (namely, aiodns and brotli) for more optimization:

pip install "aiohttp[speedups]"

Only officially documented APIs will be supported. Undocumented API calls may be invoked at the ApiContextManager layer by library users. Under-development APIs shall be decorated with an @experimental tag in library and during testing. Deprecated APIs shall be decorated with a @deprecated tag.

Session/Connector Context Cleanup

On initializing LRRClient or ApiContextManager, you may pass a selection of aiohttp-specific key parameters. The supported parameters currently include "ssl", "connector", and "client_session".

When "connector" or "client_session" are not provided, the context automatically creates them. These created resources are automatically cleaned up when leaving context/scope.

At the same time, if "connector" or "client_session" are provided, the context does not close them automatically.

Parameter hierarchy is determined by containment: the configuration which contains the other configuration takes precedence, rendering the latter ineffective. Concretely:

• if both "client_session" and "connector" are provided, then "client_session" overrides the effects of "connector", because "client_session" includes "connector".
• if both "connector" and "ssl" are provided, then "connector" takes precedence, because "connector" includes "ssl".

Library Description

All request/response classes are under the "src/lanraragi/models" directory, and inherit the LanraragiRequest and LanraragiResponse base class, respectively.

The ApiContextManager is an asynchronous HTTP context manager and handle the HTTP interaction with LANraragi.

If you don't want to use request/response DTOs, go with the API context manager.

An ApiClient represents a logical client for a collection of related APIs. They handle the DTO and request/response marshalling layer. These are only to be used by the LRRClient.

The LRRClient is a higher abstraction than ApiContextManager which also provides API clients for easy access in a context.

Version Policy

"aio-lanraragi" will use major/minor/patch versions but stay on "0.x.x" for now.

Version update is necessary only if there is change to the src/ code (comments, styling and documentation don't count). Changes to integration tests will not require version updates.

Scope

"aio-lanraragi" is designed to abstract away the boilerplate of interfacing with a LANraragi server in Python, to allow the user to focus on application business logic, rather than the HTTP/API protocols. This includes:

• automatically choosing the REST method and parameters for the API
• conversion between request, response and Pydantic DTOs for each API call
• comfortable type hinting and rigorous request/response validation with Pydantic
• aiohttp exception retry with exponential backoff
• session management logic and implementation abstraction

The scope of this library is to implement LANraragi-related API functionality which comes naturally from supporting dependencies like aiohttp/pydantic, such as session-related functionality, or type validation. On the other hand, derivative features (features which can be implemented simply by invoking multiple APIs, sometimes with the help of additional dependencies) are not supported by aio-lanraragi. Derivative features include:

• get version of server
• delete all archives by a tag or pattern
• upload archives from a folder
• checking if an image is incomplete by reading file bytes

In other words, scripting does not fall under the library's responsibility.

Until a feasable client-server version-handling strategy is implemented, support for only the most current API specification falls under the scope of the project. Request/response changes across version updates, bug fixes, corrections, tests, and slight code practice alignments also fall within the scope of this project.