aiohttp-validator

aiohttp simple pydantic http request validator

Installation

pip install aiohttp-validator

A Simple Example

import datetime as dt
from typing import Any, Dict, List, TypedDict
from uuid import UUID

import pydantic
from aiohttp import web

import aiohttp_validator as validator

routes = web.RouteTableDef()


@routes.get('/posts')
@validator.validated()
async def get_posts(request: web.Request, tags: List[str], limit: pydantic.conint(gt=0, le=100), offset: int = 0):
    assert isinstance(tags, list)
    assert isinstance(limit, int)
    assert isinstance(offset, int)
    # your code here ...

    return web.Response(status=200)


class RequestHeaders(TypedDict):
    requestId: int


class User(pydantic.BaseModel):
    name: str
    surname: str


class Post(pydantic.BaseModel):
    title: str
    text: str
    timestamp: float
    author: User
    tags: List[str] = pydantic.Field(default_factory=list)


@routes.post('/posts/{section}/{date}')
@validator.validated(config=pydantic.ConfigDict(extra='forbid'))
async def create_post(request: web.Request, body: Post, headers: RequestHeaders, section: str, date: dt.date):
    assert isinstance(body, Post)
    assert isinstance(headers, dict)
    assert isinstance(date, dt.date)
    assert isinstance(section, str)
    # your code here ...

    return web.Response(status=201)


class AuthCookies(pydantic.BaseModel):
    tokenId: UUID


@routes.post('/users')
@validator.validated(config=pydantic.ConfigDict(extra='forbid'))
async def create_user(request: web.Request, body: Dict[str, Any], headers: RequestHeaders, cookies: AuthCookies):
    assert isinstance(body, dict)
    assert isinstance(headers, RequestHeaders)
    assert isinstance(cookies, AuthCookies)
    # your code here ...

    return web.Response(status=201)

app = web.Application()
app.add_routes(routes)

web.run_app(app, port=8080)

If any path or query parameter name are clashes with body, headers or cookies argument for some reason the last can be renamed:

@routes.post('/{cookies}')
@validator.validated(cookies_argname='_cookies')
async def method(request: web.Request, body: Dict[str, Any], _cookies: AuthCookies, cookies: str):
    # your code here ...

    return web.Response(status=201)

If any argname is None the corresponding request part will not be passed to the function and argname can be used as a path or query parameter.

@routes.post('/{body}/{headers}')
@validator.validated(body_argname=None, headers_argname=None, cookies_argname=None)
async def method(request: web.Request, body: str, headers: str, cookies: str = ''):
    # your code here ...

    return web.Response(status=201)