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91 lines
2.9 KiB
Python
91 lines
2.9 KiB
Python
import asyncio
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import aiohttp
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class AsgiproxifyHandler():
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def __init__(self, scope):
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self.scope = scope
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def make_request_url(self):
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return 'http://example.org/'
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def make_request_cookies(self):
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return {}
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def make_request_headers(self):
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req_headers = {k.decode(): v.decode() for k, v in self.scope['headers']}
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req_headers.pop('host', None)
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return req_headers
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def make_response_headers(self, upstream_headers):
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headers = dict(upstream_headers)
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headers.pop('Server', None)
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headers.pop('Date', None)
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resp_headers = [(k, v) for k, v in headers.items()]
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return resp_headers
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def make_request(self, session):
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return session.request('GET', self.make_request_url(),
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cookies=self.make_request_cookies(),
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headers=self.make_request_headers(),)
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class Asgiproxify():
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app = None
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reg = {}
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def __init__(self, app=None):
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self.to(app)
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def to(self, app):
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self.app = app
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def install(self, leading_path, handler):
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self.reg[leading_path] = handler
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def register(self, leading_path):
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def decorator(c):
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self.install(leading_path, c)
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return decorator
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async def handle_proxy(self, scope, receive, send, handler):
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handler_i = handler(scope)
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request = await receive()
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async def reverse_proxy_task():
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async with aiohttp.ClientSession(auto_decompress=False) as session:
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async with handler_i.make_request(session) as resp:
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await send({
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'type': 'http.response.start',
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'status': resp.status,
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'headers': handler_i.make_response_headers(resp.headers),
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})
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async for chunk, end_of_resp in resp.content.iter_chunks():
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await send({
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'type': 'http.response.body',
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'body': chunk,
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'more_body': True,
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})
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await send({ 'type': 'http.response.body' })
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task = asyncio.create_task(reverse_proxy_task())
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while True:
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ev = await receive()
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if ev['type'] == 'http.disconnect':
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task.cancel()
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return
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async def __call__(self, scope, receive, send):
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if scope['type'] != 'http':
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return await self.app(scope, receive, send)
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handler = None
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for leading_path, proxy_handler in self.reg.items():
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if scope['path'].startswith(leading_path):
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handler = proxy_handler
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if not handler:
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return await self.app(scope, receive, send)
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else:
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return await self.handle_proxy(scope, receive, send, handler)
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