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Revert "[python] support Sanic >=21 and python >= 3.10" (#8241)

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- Reverts vercel/vercel#8045
- Fixes vercel/vercel#8231
This commit is contained in:
Steven
2022-07-25 13:40:21 -04:00
committed by GitHub
parent 1ee9a96a62
commit 5af65d5a24
6 changed files with 7 additions and 432 deletions
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12
packages/python/test/fixtures/30-asgi-lifespan/Pipfile vendored
View File

@@ -1,12 +0,0 @@
[[source]]
name = "pypi"
url = "https://pypi.org/simple"
verify_ssl = true
[dev-packages]
[packages]
sanic = "22.3.2"
[requires]
python_version = "3.10"

203
packages/python/test/fixtures/30-asgi-lifespan/Pipfile.lock generated vendored
View File

@@ -1,203 +0,0 @@
{
"_meta": {
"hash": {
"sha256": "390914ba991c8a230704140fc6be20ca33aa3b6d6359ca151be04d07c9bc6536"
},
"pipfile-spec": 6,
"requires": {
"python_version": "3.10"
},
"sources": [
{
"name": "pypi",
"url": "https://pypi.org/simple",
"verify_ssl": true
}
]
},
"default": {
"aiofiles": {
"hashes": [
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],
"markers": "python_version >= '3.6' and python_version < '4.0'",
"version": "==0.8.0"
},
"httptools": {
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},
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],
"markers": "python_version >= '3.7'",
"version": "==6.0.2"
},
"sanic": {
"hashes": [
"sha256:d0653de59cf3073d8ca047253db72c868510d45d753c13b6316aede769fb66fb",
"sha256:f6eb181e7a1b9a77a3b916de0f1413eddbe384c59487c2a4bff0c7a41e66e080"
],
"index": "pypi",
"version": "==22.6.0"
},
"sanic-routing": {
"hashes": [
"sha256:8282fc05659ff2cebbffa4fb69697601fc9d653c34e0b5bdeed04a832e793fb9",
"sha256:fde5a7d4079794b585b9a2904accd0de5a70abf27c82d2658b40c551ef44f703"
],
"version": "==22.3.0"
},
"websockets": {
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],
"markers": "python_version >= '3.7'",
"version": "==10.3"
}
},
"develop": {}
}

25
packages/python/test/fixtures/30-asgi-lifespan/api/raw.py vendored
View File

@@ -1,25 +0,0 @@
async def app(scope, receive, send):
if scope['type'] == 'http':
await send(
{
"type": "http.response.start",
"status": 200,
"headers": [[b"content-type", b"text/html"]],
}
)
await send(
{
"type": "http.response.body",
"body": b"asgi:RANDOMNESS_PLACEHOLDER"
}
)
elif scope['type'] == 'lifespan':
while True:
message = await receive()
if message['type'] == 'lifespan.startup':
await send({'type': 'lifespan.startup.complete'})
elif message['type'] == 'lifespan.shutdown':
await send({'type': 'lifespan.shutdown.complete'})
return
else:
assert False, "unreachable"

8
packages/python/test/fixtures/30-asgi-lifespan/api/sani22.py vendored
View File

@@ -1,8 +0,0 @@
from sanic import Sanic
from sanic import response
app = Sanic("vercel_test")
@app.route("/api/sani22.py")
async def index(request):
return response.text("asgi:RANDOMNESS_PLACEHOLDER")

13
packages/python/test/fixtures/30-asgi-lifespan/vercel.json vendored
View File

@@ -1,13 +0,0 @@
{
"version": 2,
"builds": [
{
"src": "api/*.py",
"use": "@vercel/python"
}
],
"probes": [
{ "path": "/api/raw.py", "mustContain": "asgi:RANDOMNESS_PLACEHOLDER" },
{ "path": "/api/sani22.py", "mustContain": "asgi:RANDOMNESS_PLACEHOLDER" }
]
}

178
packages/python/vc_init.py
View File

@@ -167,23 +167,13 @@ elif 'app' in __vc_variables:
else: else:
print('using Asynchronous Server Gateway Interface (ASGI)') print('using Asynchronous Server Gateway Interface (ASGI)')
# Originally authored by Jordan Eremieff and included under MIT license: # Originally authored by Jordan Eremieff and included under MIT license:
# https://github.com/erm/mangum/blob/07ce20a0e2f67c5c2593258a92c03fdc66d9edda/mangum/__init__.py # https://github.com/erm/mangum/blob/b4d21c8f5e304a3e17b88bc9fa345106acc50ad7/mangum/__init__.py
# https://github.com/erm/mangum/blob/07ce20a0e2f67c5c2593258a92c03fdc66d9edda/LICENSE # https://github.com/erm/mangum/blob/b4d21c8f5e304a3e17b88bc9fa345106acc50ad7/LICENSE
import asyncio import asyncio
import enum import enum
import logging
from contextlib import ExitStack
from urllib.parse import urlparse from urllib.parse import urlparse
from werkzeug.datastructures import Headers from werkzeug.datastructures import Headers
def get_event_loop():
try:
return asyncio.get_running_loop()
except:
if sys.version_info < (3, 10):
return asyncio.get_event_loop()
else:
return asyncio.get_event_loop_policy().get_event_loop()
class ASGICycleState(enum.Enum): class ASGICycleState(enum.Enum):
REQUEST = enum.auto() REQUEST = enum.auto()
@@ -204,8 +194,8 @@ elif 'app' in __vc_variables:
ASGI instance using the connection scope. ASGI instance using the connection scope.
Runs until the response is completely read from the application. Runs until the response is completely read from the application.
""" """
loop = get_event_loop() loop = asyncio.new_event_loop()
self.app_queue = asyncio.Queue() self.app_queue = asyncio.Queue(loop=loop)
self.put_message({'type': 'http.request', 'body': body, 'more_body': False}) self.put_message({'type': 'http.request', 'body': body, 'more_body': False})
asgi_instance = app(self.scope, self.receive, self.send) asgi_instance = app(self.scope, self.receive, self.send)
@@ -267,156 +257,6 @@ elif 'app' in __vc_variables:
self.response['body'] = base64.b64encode(self.body).decode('utf-8') self.response['body'] = base64.b64encode(self.body).decode('utf-8')
self.response['encoding'] = 'base64' self.response['encoding'] = 'base64'
class LifespanFailure(Exception):
"""Raise when a lifespan failure event is sent by an application."""
class LifespanUnsupported(Exception):
"""Raise when lifespan events are not supported by an application."""
class UnexpectedMessage(Exception):
"""Raise when an unexpected message type is received during an ASGI cycle."""
class LifespanCycleState(enum.Enum):
"""
The state of the ASGI `lifespan` connection.
* **CONNECTING** - Initial state. The ASGI application instance will be run with
the connection scope containing the `lifespan` type.
* **STARTUP** - The lifespan startup event has been pushed to the queue to be
received by the application.
* **SHUTDOWN** - The lifespan shutdown event has been pushed to the queue to be
received by the application.
* **FAILED** - A lifespan failure has been detected, and the connection will be
closed with an error.
* **UNSUPPORTED** - An application attempted to send a message before receiving
the lifepan startup event. If the lifespan argument is "on", then the connection
will be closed with an error.
"""
CONNECTING = enum.auto()
STARTUP = enum.auto()
SHUTDOWN = enum.auto()
FAILED = enum.auto()
UNSUPPORTED = enum.auto()
class Lifespan:
def __init__(self, app):
self.app = app
self.state = LifespanCycleState.CONNECTING
self.exception = None
self.logger = logging.getLogger('lifespan')
self.loop = get_event_loop()
self.app_queue = asyncio.Queue()
self.startup_event = asyncio.Event()
self.shutdown_event = asyncio.Event()
def __enter__(self) -> None:
"""Runs the event loop for application startup."""
self.loop.create_task(self.run())
self.loop.run_until_complete(self.startup())
def __exit__(
self,
exc_type,
exc_value,
traceback,
) -> None:
"""Runs the event loop for application shutdown."""
self.loop.run_until_complete(self.shutdown())
async def run(self):
"""Calls the application with the `lifespan` connection scope."""
try:
await self.app(
{"type": "lifespan", "asgi": {"spec_version": "2.0", "version": "3.0"}},
self.receive,
self.send,
)
except LifespanUnsupported:
self.logger.info("ASGI 'lifespan' protocol appears unsupported.")
except (LifespanFailure, UnexpectedMessage) as exc:
self.exception = exc
except BaseException as exc:
self.logger.error("Exception in 'lifespan' protocol.", exc_info=exc)
finally:
self.startup_event.set()
self.shutdown_event.set()
async def send(self, message):
"""Awaited by the application to send ASGI `lifespan` events."""
message_type = message["type"]
if self.state is LifespanCycleState.CONNECTING:
# If a message is sent before the startup event is received by the
# application, then assume that lifespan is unsupported.
self.state = LifespanCycleState.UNSUPPORTED
raise LifespanUnsupported("Lifespan protocol appears unsupported.")
if message_type not in (
"lifespan.startup.complete",
"lifespan.shutdown.complete",
"lifespan.startup.failed",
"lifespan.shutdown.failed",
):
self.state = LifespanCycleState.FAILED
raise UnexpectedMessage(f"Unexpected '{message_type}' event received.")
if self.state is LifespanCycleState.STARTUP:
if message_type == "lifespan.startup.complete":
self.startup_event.set()
elif message_type == "lifespan.startup.failed":
self.state = LifespanCycleState.FAILED
self.startup_event.set()
message_value = message.get("message", "")
raise LifespanFailure(f"Lifespan startup failure. {message_value}")
elif self.state is LifespanCycleState.SHUTDOWN:
if message_type == "lifespan.shutdown.complete":
self.shutdown_event.set()
elif message_type == "lifespan.shutdown.failed":
self.state = LifespanCycleState.FAILED
self.shutdown_event.set()
message_value = message.get("message", "")
raise LifespanFailure(f"Lifespan shutdown failure. {message_value}")
async def receive(self):
"""Awaited by the application to receive ASGI `lifespan` events."""
if self.state is LifespanCycleState.CONNECTING:
# Connection established. The next event returned by the queue will be
# `lifespan.startup` to inform the application that the connection is
# ready to receive lfiespan messages.
self.state = LifespanCycleState.STARTUP
elif self.state is LifespanCycleState.STARTUP:
# Connection shutting down. The next event returned by the queue will be
# `lifespan.shutdown` to inform the application that the connection is now
# closing so that it may perform cleanup.
self.state = LifespanCycleState.SHUTDOWN
return await self.app_queue.get()
async def startup(self) -> None:
"""Pushes the `lifespan` startup event to the queue and handles errors."""
await self.app_queue.put({"type": "lifespan.startup"})
await self.startup_event.wait()
if self.state is LifespanCycleState.FAILED:
raise LifespanFailure(self.exception)
if not self.exception:
self.logger.info("Application startup complete.")
else:
self.logger.info("Application startup failed.")
async def shutdown(self) -> None:
"""Pushes the `lifespan` shutdown event to the queue and handles errors."""
await self.app_queue.put({"type": "lifespan.shutdown"})
await self.shutdown_event.wait()
if self.state is LifespanCycleState.FAILED:
raise LifespanFailure(self.exception)
def vc_handler(event, context): def vc_handler(event, context):
payload = json.loads(event['body']) payload = json.loads(event['body'])
@@ -449,13 +289,9 @@ elif 'app' in __vc_variables:
'raw_path': path.encode(), 'raw_path': path.encode(),
} }
with ExitStack() as stack: asgi_cycle = ASGICycle(scope)
lifespan = Lifespan(__vc_module.app) response = asgi_cycle(__vc_module.app, body)
stack.enter_context(lifespan) return response
asgi_cycle = ASGICycle(scope)
response = asgi_cycle(__vc_module.app, body)
return response
else: else:
print('Missing variable `handler` or `app` in file "__VC_HANDLER_ENTRYPOINT".') print('Missing variable `handler` or `app` in file "__VC_HANDLER_ENTRYPOINT".')