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description=Sanic is a Python 3.10+ web server and web framework that s written to go fast.;

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sanic user guide the lightning fast asynchronous python web framework secure auto document and monetize your sanic api with zuplo start free sanic build fast run fast accelerate your web app development get started help github the lightning fast asynchronous python web framework simple and lightweight intuitive api with smart defaults and no bloat allows you to get straight to work building your app unopinionated and flexible build the way you want to build without letting your tooling constrain you performant and scalable built from the ground up with speed and scalability as a main concern it is ready to power web applications big and small production ready out of the box it comes bundled with a web server ready to power your web applications trusted by millions sanic is one of the overall most popular frameworks on pypi and the top async enabled framework community driven the project is maintained and run by the community for the community with the features and tools you d expect and some you wouldn t believe production grade after installing sanic has all the tools you need for a scalable production grade server out of the box including full tls support from sanic import sanic from sanic response import text app sanic myhelloworldapp app get async def hello_world request return text hello world sanic path to server app 2023 01 31 12 34 56 0000 999996 info sanic v22 12 0 2023 01 31 12 34 56 0000 999996 info goin fast http 127 0 0 1 8000 2023 01 31 12 34 56 0000 999996 info mode production single worker 2023 01 31 12 34 56 0000 999996 info server sanic http 1 1 2023 01 31 12 34 56 0000 999996 info python 3 10 9 2023 01 31 12 34 56 0000 999996 info platform someos 9 8 7 2023 01 31 12 34 56 0000 999996 info packages sanic routing 22 8 0 2023 01 31 12 34 56 0000 999997 info starting worker 999997 tls server running sanic with tls enabled is as simple as passing it the file paths sanic path to server app cert path to bundle crt key path to privkey pem or the a directory containing fullchain pem and privkey pem sanic path to server app tls path to certs even better while you are developing let sanic handle setting up local tls certificates so you can access your site over tls at https localhost 8443 sanic path to server app dev auto tls websockets up and running with websockets in no time using the websockets package from sanic import request websocket app websocket feed async def feed request request ws websocket async for msg in ws await ws send msg static files serving static files is of course intuitive and easy just name an endpoint and either a file or directory that should be served app static path to index html app static uploads path to uploads moreover serving a directory has two additional features automatically serving an index and automatically serving a file browser sanic can automatically serve index html or any other named file as an index page in a directory or its subdirectories app static uploads path to uploads index index html and or setup sanic to display a file browser app static uploads path to uploads directory_view true lifecycle beginning or ending a route with functionality is as simple as adding a decorator app on_request async def add_key request request ctx foo bar app on_response async def custom_banner request response response headers x foo request ctx foo same with server events app before_server_start async def setup_db app app ctx db_pool await db_setup app after_server_stop async def setup_db app await app ctx db_pool shutdown but sanic also allows you to tie into a bunch of built in events called signals or create and dispatch your own app signal http lifecycle complete built in async def my_signal_handler conn_info print connection has been closed app signal something happened ohmy custom async def my_signal_handler print something happened await app dispatch something happened ohmy smart error handling raising errors will intuitively result in proper http errors raise sanic exceptions notfound automatically responds with http 404 or make your own from sanic exceptions import sanicexception class teapoterror sanicexception status_code 418 message sorry i cannot brew coffee raise teapoterror and when an error does happen sanic s beautiful dev mode error page will help you drill down to the bug quickly regardless sanic comes with an algorithm that attempts to respond with html json or text based errors as appropriate don t worry it is super easy to setup and customize your error handling to your exact needs app inspector check in on your live running applications whether local or remote sanic inspect sanic inspecting http localhost 6457 mode production single worker server unknown python 3 10 9 platform someos 9 8 7 packages sanic 22 12 0 sanic routing 22 8 0 sanic testing 22 12 0 sanic ext 22 12 0 build fast run fast sanic main pid 999996 sanic server 0 0 server true state acked pid 999997 start_at 2023 01 31t12 34 56 00000 00 00 starts 1 sanic inspector 0 server false state started pid 999998 start_at 2023 01 31t12 34 56 00000 00 00 starts 1 and issue commands like reload shutdown scale sanic inspect scale 4 or even create your own sanic inspect migrations extendable in addition to the tools that sanic comes with the officially supported sanic extensions provides lots of extra goodies to make development easier cors protection template rendering with jinja dependency injection into route handlers openapi documentation with redoc and or swagger predefined endpoint specific response serializers request query arguments and body input validation auto create head options and trace endpoints live health monitor developer experience sanic is built for building from the moment it is installed sanic includes helpful tools to help the developer get their job done one server develop locally in dev mode on the same server that will run your production application auto reload reload running applications every time you save a python file but also auto reload on any arbitrary directory like html template directories debugging tools super helpful and beautiful error pages that help you traverse the trace stack easily auto tls running a localhost website with https can be difficult sanic makes it easy streamlined testing built in testing capabilities making it easier for developers to create and run tests ensuring the quality and reliability of their services modern python thoughtful use of type hints to help the developer ide experience mit licensed copyright 2018 2026 sanic community organization this site is powered made with ️ and ️