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GraphQL WS | ||
========== | ||
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Websocket server for GraphQL subscriptions. | ||
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Currently supports: \* | ||
`aiohttp <https://github.com/graphql-python/graphql-ws#aiohttp>`__ \* | ||
`Gevent <https://github.com/graphql-python/graphql-ws#gevent>`__ | ||
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Installation instructions | ||
========================= | ||
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For instaling graphql-ws, just run this command in your shell | ||
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.. code:: bash | ||
pip install graphql-ws | ||
Examples | ||
-------- | ||
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aiohttp | ||
~~~~~~~ | ||
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For setting up, just plug into your aiohttp server. | ||
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.. code:: python | ||
from graphql_ws.aiohttp import AiohttpSubscriptionServer | ||
subscription_server = AiohttpSubscriptionServer(schema) | ||
async def subscriptions(request): | ||
ws = web.WebSocketResponse(protocols=('graphql-ws',)) | ||
await ws.prepare(request) | ||
await subscription_server.handle(ws) | ||
return ws | ||
app = web.Application() | ||
app.router.add_get('/subscriptions', subscriptions) | ||
web.run_app(app, port=8000) | ||
And then, plug into a subscribable schema: | ||
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.. code:: python | ||
import asyncio | ||
import graphene | ||
class Query(graphene.ObjectType): | ||
base = graphene.String() | ||
class Subscription(graphene.ObjectType): | ||
count_seconds = graphene.Float(up_to=graphene.Int()) | ||
async def resolve_count_seconds(root, info, up_to): | ||
for i in range(up_to): | ||
yield i | ||
await asyncio.sleep(1.) | ||
yield up_to | ||
schema = graphene.Schema(query=Query, subscription=Subscription) | ||
You can see a full example here: | ||
https://github.com/graphql-python/graphql-ws/tree/master/examples/aiohttp | ||
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Gevent | ||
~~~~~~ | ||
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For setting up, just plug into your Gevent server. | ||
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.. code:: python | ||
subscription_server = GeventSubscriptionServer(schema) | ||
app.app_protocol = lambda environ_path_info: 'graphql-ws' | ||
@sockets.route('/subscriptions') | ||
def echo_socket(ws): | ||
subscription_server.handle(ws) | ||
return [] | ||
And then, plug into a subscribable schema: | ||
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.. code:: python | ||
import graphene | ||
from rx import Observable | ||
class Query(graphene.ObjectType): | ||
base = graphene.String() | ||
class Subscription(graphene.ObjectType): | ||
count_seconds = graphene.Float(up_to=graphene.Int()) | ||
async def resolve_count_seconds(root, info, up_to=5): | ||
return Observable.interval(1000)\ | ||
.map(lambda i: "{0}".format(i))\ | ||
.take_while(lambda i: int(i) <= up_to) | ||
schema = graphene.Schema(query=Query, subscription=Subscription) | ||
You can see a full example here: | ||
https://github.com/graphql-python/graphql-ws/tree/master/examples/flask\_gevent |
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#!/bin/bash | ||
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pandoc README.md --from markdown --to rst -s -o README.rst |
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