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asyncio + graphql = fast and simple api

Project description

  • asyncio - explicit concurrency to reduce race conditions

  • graphql - all you need and nothing more in one request +auto docs of your api

  • uvloop, protocol - top performance

  • minimal http - unlike REST frameworks that are waste of time for /graphql endpoint

  • pluggable context - for auth, logging, etc

  • exception handling - at all levels, with default or custom handler

Usage:

pip install aiographql

cat <<'END' >serve.py
import asyncio, aiographql, graphene

class User(graphene.ObjectType):
    id = graphene.ID(required=True)
    name = graphene.String()

class Query(graphene.ObjectType):
    me = graphene.Field(User)

    async def resolve_me(self, info):
        await asyncio.sleep(1)  # DB
        return User(id=42, name='John')

schema = graphene.Schema(query=Query, mutation=None)
aiographql.serve(schema)
END

UNIX_SOCK=/tmp/worker0 python3 serve.py

curl --unix-socket /tmp/worker0 http:/ --data-binary '{"query": "{
    me {
        id
        name
    }
}", "variables": null}'

# Result:
# 1 second async await for DB and then:
{"data":{"me":{"id":"42","name":"John"}}}

See more examples and tests about JWT auth, concurrent slow DB queries, etc.

Config:

import aiographql; help(aiographql.serve)

serve(schema, get_context=None, unix_sock=None, exception_handler=None, enable_uvloop=True, run=True)
    Configure the stack and start serving requests
  • schema: graphene.Schema - GraphQL schema to serve

  • get_context: None or callable(headers: bytes, request: dict): mixed - callback to produce GraphQL context, for example auth

  • unix_sock: str - path to unix socket to listen for requests, defaults to env var UNIX_SOCK or '/tmp/worker0'

  • exception_handler: None or callable(loop, context: dict) - default or custom exception handler as defined here

  • enable_uvloop: bool - enable uvloop for top performance, unless you have a better loop

  • run: bool - if True, run the loop and the coroutine serving requests, else return this coroutine

  • return: coroutine or None - the coroutine serving requests, unless run=True

Project details


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