Over-Simple JSON RPC Implementation

Over-simple JSON-RPC Python implementation for aiohttp

Install

pip install osjsonrpc

Usage

Example:

from aiohttp import web
from osjsonrpc import JsonRpcEndpoint

def ping():
    return "pong"

def multiply(a, b):
    return {"a": a, "b": b, "a*b": a * b}

rpc = (
    JsonRpcEndpoint()
    .register_method(ping)
    .register_method(multiply)
)

app = web.Application()
app.add_routes([rpc.route("/api")])
web.run_app(app)

Call the ping method without arguments:

~ curl -s -H "Content-Type: application/json" -H "Accept: application/json" -X POST \
  -d '{"jsonrpc":"2.0", "method": "ping", "id": 1}' \
  http://localhost:8080/api | jq

{
  "jsonrpc": "2.0",
  "result": "pong",
  "id": 1
}

Call the multiply with a couple of positional arguments:

~ curl -s -H "Content-Type: application/json" -H "Accept: application/json" -X POST \
  -d '{"jsonrpc":"2.0", "method": "multiply", "params": [3, 5], "id": 1}' \
  http://localhost:8080/api | jq

{
  "jsonrpc": "2.0",
  "result": {
    "a": 3,
    "b": 5,
    "a*b": 15
  },
  "id": 1
}

Call the ping argument with invalid keyword argument:

~ curl -s -H "Content-Type: application/json" -H "Accept: application/json" -X POST \
  -d '{"jsonrpc":"2.0", "method": "ping", "params": {"key": "value"}, "id": 1}' \
  http://localhost:8080/api | jq

{
  "jsonrpc": "2.0",
  "error": {
    "code": -32602,
    "message": "Invalid params",
    "data": {
      "detail": "TypeError: ping() got an unexpected keyword argument 'key'",
      "request": {
        "jsonrpc": "2.0",
        "method": "ping",
        "params": {
          "key": "value"
        },
        "id": 1
      }
    }
  },
  "id": 1
}