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Improve Quart example (#1229)
This commit is contained in:
Phil Jones
Lonami
parent
2b277dd558
commit
e1355ae5d8
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@ -1,7 +1,8 @@
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import base64
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import os
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from quart import Quart, request
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import hypercorn.asyncio
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from quart import Quart, render_template_string, request
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from telethon import TelegramClient, utils
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@ -12,24 +13,44 @@ def get_env(name, message):
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return input(message)
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BASE_TEMPLATE = '''
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset='UTF-8'>
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<title>Telethon + Quart</title>
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</head>
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<body>{{ content | safe }}</body>
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</html>
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'''
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PHONE_FORM = '''
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<form action='/' method='post'>
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Phone (international format): <input name='phone' type='text' placeholder='+34600000000'>
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<input type='submit'>
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</form>
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'''
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CODE_FORM = '''
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<form action='/' method='post'>
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Telegram code: <input name='code' type='text' placeholder='70707'>
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<input type='submit'>
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</form>
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'''
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# Session name, API ID and hash to use; loaded from environmental variables
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SESSION = os.environ.get('TG_SESSION', 'quart')
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API_ID = int(get_env('TG_API_ID', 'Enter your API ID: '))
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API_HASH = get_env('TG_API_HASH', 'Enter your API hash: ')
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# Telethon client
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client = TelegramClient(SESSION, API_ID, API_HASH)
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client.parse_mode = 'html' # <- Render things nicely
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phone = None
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# Helper method to add the HTML head/body
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def html(inner):
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return '''
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<title>Telethon + Quart</title>
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</head>
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<body>{}</body>
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</html>
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'''.format(inner)
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# Quart app
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app = Quart(__name__)
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app.secret_key = 'CHANGE THIS TO SOMETHING SECRET'
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# Helper method to format messages nicely
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@ -50,18 +71,20 @@ async def format_message(message):
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)
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# Define the global phone and Quart app variables
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phone = None
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app = Quart(__name__)
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# Quart handlers
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@app.route('/', methods=['GET', 'POST'])
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async def root():
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# Connect if we aren't yet
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if not client.is_connected():
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# Connect the client before we start serving with Quart
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@app.before_serving
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async def startup():
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await client.connect()
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# After we're done serving (near shutdown), clean up the client
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@app.after_serving
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async def cleanup():
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await client.disconnect()
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@app.route('/', methods=['GET', 'POST'])
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async def root():
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# We want to update the global phone variable to remember it
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global phone
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@ -82,22 +105,18 @@ async def root():
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async for m in client.iter_messages(dialog, 10):
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result += await(format_message(m))
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return html(result)
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return await render_template_string(BASE_TEMPLATE, content=result)
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# Ask for the phone if we don't know it yet
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if phone is None:
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return html('''
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<form action="/" method="post">
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Phone (international format): <input name="phone" type="text" placeholder="+34600000000">
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<input type="submit">
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</form>''')
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return await render_template_string(BASE_TEMPLATE, content=PHONE_FORM)
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# We have the phone, but we're not logged in, so ask for the code
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return html('''
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<form action="/" method="post">
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Telegram code: <input name="code" type="text" placeholder="70707">
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<input type="submit">
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</form>''')
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return await render_template_string(BASE_TEMPLATE, content=CODE_FORM)
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async def main():
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await hypercorn.asyncio.serve(app, hypercorn.Config())
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# By default, `Quart.run` uses `asyncio.run()`, which creates a new asyncio
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@ -108,13 +127,12 @@ async def root():
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# So, we have to manually pass the same `loop` to both applications to
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# make 100% sure it works and to avoid headaches.
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#
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# Quart doesn't seem to offer a way to run inside `async def`
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# (see https://gitlab.com/pgjones/quart/issues/146) so we must
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# run and block on it last.
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# To run Quart inside `async def`, we must use `hypercorn.asyncio.serve()`
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# directly.
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#
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# This example creates a global client outside of Quart handlers.
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# If you create the client inside the handlers (common case), you
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# won't have to worry about any of this.
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client = TelegramClient(SESSION, API_ID, API_HASH)
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client.parse_mode = 'html' # <- render things nicely
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app.run(loop=client.loop) # <- same event loop as telethon
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# won't have to worry about any of this, but it's still good to be
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# explicit about the event loop.
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if __name__ == '__main__':
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client.loop.run_until_complete(main())
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