prpc-python

prpc-python - Pyodide Remote Procedure Calls - Python Server

Provides server-side bindings for prpc API.

To expose a python function as a prpc method you first create a prpc RpcApp and then decorate your function with @app.call.

Create a file called myapp.py and add the following code:

# myapp.py
from prpc_python import RpcApp

app = RpcApp("My Hello World App")


@app.call
def hello():
    return "World"

Discovering your API

You can now discover your API using the prpc command line tool. To do this you either have to specify the plugin ID of your app or "publish" the plugin using the Python plugin discovery approach.

The ID of your plugin is the name of the module containing your RpcApp instance plus the name of the instance, e.g. myapp:app for the example above.

You can now use the command line tool to discover your API:

prpc commands -a myapp:app     

and you can even call your function from the command line:

prpc run -a myapp:app hello

Publishing

You don't always want to have to specify the plugin ID of your app. You can use the approach described in the metadata section of the packaging spec to publish your plugin. If you have a pyproject.toml file, then add the following section:

[tool.poetry.plugins."prpc_python"]
myapp = "myapp:app"

If your plugin is the only one in your installed dependencies, then it will be automatically chosen, and you can omit the -a myapp:app argument.

Files

prpc also supports file transfers. If you receive a file from the remote endpoint, you will receive a prpc_python.RemoteFile object. This object has a standard read method, so you can use it as a file-like object.

It may also have filename, size and content_type attributes but it depends on the source of the file whether these are available.