๐ ๐จ & APIRoute ๐¶
๐ผ, ๐ 5๏ธโฃ๐ ๐ ๐ โ โ๏ธ Request & APIRoute ๐.
๐ฏ, ๐ 5๏ธโฃ๐ ๐ ๐ โ ๐ ๏ธ.
๐ผ, ๐ฅ ๐ ๐ โ โ๏ธ ๐ฌ ๐จ ๐ช โญ โซ๏ธ ๐ ๏ธ ๐ ๐ธ.
Danger
๐ "๐ง" โ.
๐ฅ ๐ โถ๏ธ โฎ๏ธ FastAPI ๐ ๐ช ๐ ๐ถ ๐ ๐.
โ๏ธ ๐ผ¶
โ๏ธ ๐ผ ๐:
- ๐ญ ๐ซ-๐ป ๐จ ๐ช ๐ป (โ
msgpack). - ๐ ๐-๐ ๐จ ๐ช.
- ๐ ๐จ ๐ ๐จ ๐ช.
๐ ๐ ๐จ ๐ช ๐ข¶
โก๏ธ ๐ โ โ โ๏ธ ๐ Request ๐ฟ ๐ ๐ ๐จ.
& APIRoute ๐ฟ โ๏ธ ๐ ๐ ๐จ ๐.
โ ๐ GzipRequest ๐¶
Tip
๐ ๐งธ ๐ผ ๐ฆ โ โซ๏ธ ๐ท, ๐ฅ ๐ ๐ช ๐ ๐โ๐ฆบ, ๐ ๐ช โ๏ธ ๐ GzipMiddleware.
๐ฅ, ๐ฅ โ GzipRequest ๐, โ ๐ ๐ Request.body() ๐ฉโ๐ฌ ๐ ๐ช ๐ โ ๐.
๐ฅ ๐ค ๐
โโ gzip ๐, โซ๏ธ ๐ ๐ซ ๐ ๐ ๐ช.
๐ ๐, ๐ ๐ฃ ๐ ๐ช ๐ต ๐ ๐ โ๏ธ ๐ ๐จ.
import gzip
from typing import Callable, List
from fastapi import Body, FastAPI, Request, Response
from fastapi.routing import APIRoute
class GzipRequest(Request):
async def body(self) -> bytes:
if not hasattr(self, "_body"):
body = await super().body()
if "gzip" in self.headers.getlist("Content-Encoding"):
body = gzip.decompress(body)
self._body = body
return self._body
class GzipRoute(APIRoute):
def get_route_handler(self) -> Callable:
original_route_handler = super().get_route_handler()
async def custom_route_handler(request: Request) -> Response:
request = GzipRequest(request.scope, request.receive)
return await original_route_handler(request)
return custom_route_handler
app = FastAPI()
app.router.route_class = GzipRoute
@app.post("/sum")
async def sum_numbers(numbers: List[int] = Body()):
return {"sum": sum(numbers)}
โ ๐ GzipRoute ๐¶
โญ, ๐ฅ โ ๐ ๐ฟ fastapi.routing.APIRoute ๐ ๐ โ โ๏ธ GzipRequest.
๐ ๐ฐ, โซ๏ธ ๐ ๐ ๐ฉโ๐ฌ APIRoute.get_route_handler().
๐ ๐ฉโ๐ฌ ๐จ ๐ข. & ๐ ๐ข โซ๏ธโ ๐ ๐จ ๐จ & ๐จ ๐จ.
๐ฅ ๐ฅ โ๏ธ โซ๏ธ โ GzipRequest โช๏ธโก๏ธ โฎ๏ธ ๐จ.
import gzip
from typing import Callable, List
from fastapi import Body, FastAPI, Request, Response
from fastapi.routing import APIRoute
class GzipRequest(Request):
async def body(self) -> bytes:
if not hasattr(self, "_body"):
body = await super().body()
if "gzip" in self.headers.getlist("Content-Encoding"):
body = gzip.decompress(body)
self._body = body
return self._body
class GzipRoute(APIRoute):
def get_route_handler(self) -> Callable:
original_route_handler = super().get_route_handler()
async def custom_route_handler(request: Request) -> Response:
request = GzipRequest(request.scope, request.receive)
return await original_route_handler(request)
return custom_route_handler
app = FastAPI()
app.router.route_class = GzipRoute
@app.post("/sum")
async def sum_numbers(numbers: List[int] = Body()):
return {"sum": sum(numbers)}
๐ก โน
Request โ๏ธ request.scope ๐ข, ๐ ๐ dict โ ๐ ๐ ๐จ.
Request โ๏ธ request.receive, ๐ ๐ข "๐จ" ๐ช ๐จ.
scope dict & receive ๐ข ๐ฏโโ๏ธ ๐ ๐ซ ๐ง.
& ๐ 2๏ธโฃ ๐, scope & receive, โซ๏ธโ ๐ช โ ๐ Request ๐.
๐ก ๐
๐ Request โ
๐ ๐ฉบ ๐ ๐จ.
๐ด ๐ ๐ข ๐จ GzipRequest.get_route_handler ๐จ ๐ ๐ Request GzipRequest.
๐จ ๐, ๐ GzipRequest ๐ โ ๐
๐ ๐ (๐ฅ ๐ช) โญ ๐ถโโ๏ธ โซ๏ธ ๐ โก ๐ ๏ธ.
โฎ๏ธ ๐, ๐ ๐ญ โ ๐.
โ๏ธ โฉ๏ธ ๐ ๐ GzipRequest.body, ๐จ ๐ช ๐ ๐ ๐ ๐โ โซ๏ธ ๐ FastAPI ๐โ ๐ช.
๐ ๐จ ๐ช โ ๐โ๐ฆบ¶
Tip
โ ๐ ๐ โ , โซ๏ธ ๐ฒ ๐ โฉ โ๏ธ body ๐ ๐โ๐ฆบ RequestValidationError (๐ โ).
โ๏ธ ๐ ๐ผ โ & โซ๏ธ ๐ฆ โ ๐ โฎ๏ธ ๐ ๐ฆฒ.
๐ฅ ๐ช โ๏ธ ๐ ๐ ๐ฏ ๐ ๐จ ๐ช โ ๐โ๐ฆบ.
๐ ๐ฅ ๐ช ๐ต ๐จ ๐ try/except ๐ซ:
from typing import Callable, List
from fastapi import Body, FastAPI, HTTPException, Request, Response
from fastapi.exceptions import RequestValidationError
from fastapi.routing import APIRoute
class ValidationErrorLoggingRoute(APIRoute):
def get_route_handler(self) -> Callable:
original_route_handler = super().get_route_handler()
async def custom_route_handler(request: Request) -> Response:
try:
return await original_route_handler(request)
except RequestValidationError as exc:
body = await request.body()
detail = {"errors": exc.errors(), "body": body.decode()}
raise HTTPException(status_code=422, detail=detail)
return custom_route_handler
app = FastAPI()
app.router.route_class = ValidationErrorLoggingRoute
@app.post("/")
async def sum_numbers(numbers: List[int] = Body()):
return sum(numbers)
๐ฅ โ ๐, Request ๐ ๐ โ, ๐ฅ ๐ช โ & โ โ๏ธ ๐จ ๐ช ๐โ ๐ โ:
from typing import Callable, List
from fastapi import Body, FastAPI, HTTPException, Request, Response
from fastapi.exceptions import RequestValidationError
from fastapi.routing import APIRoute
class ValidationErrorLoggingRoute(APIRoute):
def get_route_handler(self) -> Callable:
original_route_handler = super().get_route_handler()
async def custom_route_handler(request: Request) -> Response:
try:
return await original_route_handler(request)
except RequestValidationError as exc:
body = await request.body()
detail = {"errors": exc.errors(), "body": body.decode()}
raise HTTPException(status_code=422, detail=detail)
return custom_route_handler
app = FastAPI()
app.router.route_class = ValidationErrorLoggingRoute
@app.post("/")
async def sum_numbers(numbers: List[int] = Body()):
return sum(numbers)
๐ APIRoute ๐ ๐ป¶
๐ ๐ช โ route_class ๐ข APIRouter:
import time
from typing import Callable
from fastapi import APIRouter, FastAPI, Request, Response
from fastapi.routing import APIRoute
class TimedRoute(APIRoute):
def get_route_handler(self) -> Callable:
original_route_handler = super().get_route_handler()
async def custom_route_handler(request: Request) -> Response:
before = time.time()
response: Response = await original_route_handler(request)
duration = time.time() - before
response.headers["X-Response-Time"] = str(duration)
print(f"route duration: {duration}")
print(f"route response: {response}")
print(f"route response headers: {response.headers}")
return response
return custom_route_handler
app = FastAPI()
router = APIRouter(route_class=TimedRoute)
@app.get("/")
async def not_timed():
return {"message": "Not timed"}
@router.get("/timed")
async def timed():
return {"message": "It's the time of my life"}
app.include_router(router)
๐ ๐ผ, โก ๐ ๏ธ ๐ฝ router ๐ โ๏ธ ๐ TimedRoute ๐, & ๐ โ๏ธ โ X-Response-Time ๐ ๐จ โฎ๏ธ ๐ฐ โซ๏ธ โ ๐ ๐จ:
import time
from typing import Callable
from fastapi import APIRouter, FastAPI, Request, Response
from fastapi.routing import APIRoute
class TimedRoute(APIRoute):
def get_route_handler(self) -> Callable:
original_route_handler = super().get_route_handler()
async def custom_route_handler(request: Request) -> Response:
before = time.time()
response: Response = await original_route_handler(request)
duration = time.time() - before
response.headers["X-Response-Time"] = str(duration)
print(f"route duration: {duration}")
print(f"route response: {response}")
print(f"route response headers: {response.headers}")
return response
return custom_route_handler
app = FastAPI()
router = APIRouter(route_class=TimedRoute)
@app.get("/")
async def not_timed():
return {"message": "Not timed"}
@router.get("/timed")
async def timed():
return {"message": "It's the time of my life"}
app.include_router(router)