87c24e5a7c
When Sanic has an exception in a request middleware, it fails to
save request object in `results`. In `sanic_endpoint_test`, because
it always requires `results` to have both `request` and `response` objects,
it prints traceback like attached example. It is not a user code and
it doesn't give any information to users, it is better to suppress
to print this kind of error.
To fix it, this patch insert collect hook as first request middleware
to guarantee to successfully run it always.
```
app = <sanic.sanic.Sanic object at 0x1102b5358>, method = 'get', uri = '/ping/', gather_request = True, loop = None
debug = True, request_args = (), request_kwargs = {}
_collect_request = <function sanic_endpoint_test.<locals>._collect_request at 0x11286c158>
_collect_response = <function sanic_endpoint_test.<locals>._collect_response at 0x11286c378>
def sanic_endpoint_test(app, method='get', uri='/', gather_request=True,
loop=None, debug=False, *request_args,
**request_kwargs):
results = []
exceptions = []
if gather_request:
@app.middleware
def _collect_request(request):
results.append(request)
async def _collect_response(sanic, loop):
try:
response = await local_request(method, uri, *request_args,
**request_kwargs)
results.append(response)
except Exception as e:
exceptions.append(e)
app.stop()
app.run(host=HOST, debug=debug, port=42101,
after_start=_collect_response, loop=loop)
if exceptions:
raise ValueError("Exception during request: {}".format(exceptions))
if gather_request:
try:
> request, response = results
E ValueError: not enough values to unpack (expected 2, got 1)
../sanic/sanic/utils.py:46: ValueError
```
Sanic
Sanic is a Flask-like Python 3.5+ web server that's written to go fast. It's based on the work done by the amazing folks at magicstack, and was inspired by this article: https://magic.io/blog/uvloop-blazing-fast-python-networking/.
On top of being Flask-like, Sanic supports async request handlers. This means you can use the new shiny async/await syntax from Python 3.5, making your code non-blocking and speedy.
Benchmarks
All tests were run on an AWS medium instance running ubuntu, using 1 process. Each script delivered a small JSON response and was tested with wrk using 100 connections. Pypy was tested for Falcon and Flask but did not speed up requests.
| Server | Implementation | Requests/sec | Avg Latency |
|---|---|---|---|
| Sanic | Python 3.5 + uvloop | 33,342 | 2.96ms |
| Wheezy | gunicorn + meinheld | 20,244 | 4.94ms |
| Falcon | gunicorn + meinheld | 18,972 | 5.27ms |
| Bottle | gunicorn + meinheld | 13,596 | 7.36ms |
| Flask | gunicorn + meinheld | 4,988 | 20.08ms |
| Kyoukai | Python 3.5 + uvloop | 3,889 | 27.44ms |
| Aiohttp | Python 3.5 + uvloop | 2,979 | 33.42ms |
| Tornado | Python 3.5 | 2,138 | 46.66ms |
Hello World
from sanic import Sanic
from sanic.response import json
app = Sanic()
@app.route("/")
async def test(request):
return json({"hello": "world"})
if __name__ == "__main__":
app.run(host="0.0.0.0", port=8000)
Installation
python -m pip install sanic
Documentation
- Getting started
- Request Data
- Routing
- Middleware
- Exceptions
- Blueprints
- Class Based Views
- Cookies
- Static Files
- Testing
- Deploying
- Contributing
- License
TODO:
- Streamed file processing
- File output
- Examples of integrations with 3rd-party modules
- RESTful router
Limitations:
- No wheels for uvloop and httptools on Windows :(
Final Thoughts:
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