asyncio + aiohttp で作るウェブサービス / How to develop a web service with asyncio and aiohttp

PyCon JP 2018 で発表した資料です。

『 asyncio + aiohttp で作るウェブサービス 』
https://pycon.jp/2018/event/sessions

---

This is the material I presented at PyConJP 2018.

"How to develop a web service with asyncio and aiohttp"
https://pycon.jp/2018/event/sessions

Transcript

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7. &WFOU MPPQ
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   import asyncio
   loop = asyncio.get_event_loop()
   loop.run_forever()
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   import asyncio
   import uvloop
   asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())
   

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8. &WFOU MPPQ
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   import asyncio
   loop = asyncio.get_event_loop()
   loop.run_forever()
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   import asyncio
   import uvloop
   asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())
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9. &WFOU MPPQ
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   import asyncio
   loop = asyncio.get_event_loop()
   loop.run_forever()
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   import asyncio
   import uvloop
   asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())
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10. $PSPVUJOFT
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    import asyncio
    async def run():
    await asyncio.sleep(1)
    coroutine = run()
    print(coroutine)
    #=>
    loop = asyncio.get_event_loop()
    loop.run_until_complete(coroutine)
    

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11. $PSPVUJOFT
    § &BTZUPVTFDPSPVUJOFT
    import asyncio
    async def run():
    await asyncio.sleep(1)
    coroutine = run()
    print(coroutine)
    #=>
    loop = asyncio.get_event_loop()
    loop.run_until_complete(coroutine)
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12. $PSPVUJOFT
    § &BTZUPVTFDPSPVUJOFT
    import asyncio
    async def run():
    await asyncio.sleep(1)
    coroutine = run()
    print(coroutine)
    #=>
    loop = asyncio.get_event_loop()
    loop.run_until_complete(coroutine)
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13. $PSPVUJOFT
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    import asyncio
    async def run():
    await asyncio.sleep(1)
    coroutine = run()
    print(coroutine)
    #=>
    loop = asyncio.get_event_loop()
    loop.run_until_complete(coroutine)
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14. 'VUVSFT
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    improt asyncio
    async def identity(value):
    return value
    future1 = asyncio.ensure_future(identity(1))
    future2 = asyncio.ensure_future(identity(2))
    future3 = asyncio.gather(future1, future2)
    loop = asyncio.get_event_loop()
    print(loop.run_until_complete(future3))
    #=> [1, 2]
    

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15. 'VUVSFT
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    improt asyncio
    async def identity(value):
    return value
    future1 = asyncio.ensure_future(identity(1))
    future2 = asyncio.ensure_future(identity(2))
    future3 = asyncio.gather(future1, future2)
    loop = asyncio.get_event_loop()
    print(loop.run_until_complete(future3))
    #=> [1, 2]
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16. 'VUVSFT
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    improt asyncio
    async def identity(value):
    return value
    future1 = asyncio.ensure_future(identity(1))
    future2 = asyncio.ensure_future(identity(2))
    future3 = asyncio.gather(future1, future2)
    loop = asyncio.get_event_loop()
    print(loop.run_until_complete(future3))
    #=> [1, 2]
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17. 'VUVSFT
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    improt asyncio
    async def identity(value):
    return value
    future1 = asyncio.ensure_future(identity(1))
    future2 = asyncio.ensure_future(identity(2))
    future3 = asyncio.gather(future1, future2)
    loop = asyncio.get_event_loop()
    print(loop.run_until_complete(future3))
    #=> [1, 2]
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18. 'VUVSFT
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    improt asyncio
    async def identity(value):
    return value
    future1 = asyncio.ensure_future(identity(1))
    future2 = asyncio.ensure_future(identity(2))
    future3 = asyncio.gather(future1, future2)
    loop = asyncio.get_event_loop()
    print(loop.run_until_complete(future3))
    #=> [1, 2]
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21. )BOEMFST
    from aiohttp import web
    async def items(request):
    page = request.query.get(‘page’)
    items = await item_repository.filter(page)
    return web.json_response(result)
    app.router.add_get(‘/items’, items)
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22. )BOEMFST
    from aiohttp import web
    async def items(request):
    page = request.query.get(‘page’)
    items = await item_repository.filter(page)
    return web.json_response(result)
    app.router.add_get(‘/items’, items)
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23. )BOEMFST
    from aiohttp import web
    async def items(request):
    page = request.query.get(‘page’)
    items = await item_repository.filter(page)
    return web.json_response(result)
    app.router.add_get(‘/items’, items)
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24. )BOEMFST
    from aiohttp import web
    routes = web.RouteTableDef()
    @routes.get(‘/items’)
    async def items(request):
    page = request.query.get(‘page’)
    items = await item_repository.filter(page)
    return web.json_response(result)
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25. .JEEMFXBSFT
    import htmlmin
    from aiohttp import web
    @web.middleware
    async def htmlmin_middleware(request, handler):
    response = await handler(request)
    if response.content_type == 'text/html':
    response.text = htmlmin.minify(response.text)
    return response
    app.middlewares.append(htmlmin_middleware())
    § )5.-NJOJGZNJEEMFXBSFTBNQMF
    

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26. .JEEMFXBSFT
    import htmlmin
    from aiohttp import web
    @web.middleware
    async def htmlmin_middleware(request, handler):
    response = await handler(request)
    if response.content_type == 'text/html':
    response.text = htmlmin.minify(response.text)
    return response
    app.middlewares.append(htmlmin_middleware())
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27. 1SPEVDUJPO
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    $ gunicorn myapp:app --bind localhost:8080
    --worker-class aiohttp.GunicornWebWorker
    

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