60 lines
1.4 KiB
Python
60 lines
1.4 KiB
Python
# These comments let tutorial-asyncio.rst include this code in sections.
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# -- setup-start --
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from aiohttp import web
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from motor.motor_asyncio import AsyncIOMotorClient
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async def setup_db():
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db = AsyncIOMotorClient().test
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await db.pages.drop()
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html = "<html><body>{}</body></html>"
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await db.pages.insert_one({"_id": "page-one", "body": html.format("Hello!")})
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await db.pages.insert_one({"_id": "page-two", "body": html.format("Goodbye.")})
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return db
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# -- setup-end --
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# -- handler-start --
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async def page_handler(request):
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# If the visitor gets "/pages/page-one", then page_name is "page-one".
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page_name = request.match_info.get("page_name")
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# Retrieve the long-lived database handle.
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db = request.app["db"]
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# Find the page by its unique id.
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document = await db.pages.find_one(page_name)
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if not document:
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return web.HTTPNotFound(text=f"No page named {page_name!r}")
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return web.Response(body=document["body"].encode(), content_type="text/html")
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# -- handler-end --
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# -- main-start --
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async def init_connection():
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db = await setup_db()
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app = web.Application()
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app["db"] = db
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# Route requests to the page_handler() coroutine.
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app.router.add_get("/pages/{page_name}", page_handler)
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return app
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def main():
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app = init_connection()
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web.run_app(app)
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if __name__ == "__main__":
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main()
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# -- main-end --
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