content-types

Content Types Example

This example demonstrates how to handle requests with multiple content types in BlackSheep (requires BlackSheep >= 2.6.2).

For context, see Neoteroi/BlackSheep#669 and Neoteroi/BlackSheep#514.

Overview

The POST /foo endpoint accepts request bodies in any of the following formats:

• application/json
• application/xml
• text/xml

This is achieved using a union type annotation combining FromJSON and FromXML binders:

@post("/foo")
async def create_foo(data: FromJSON[CreateFooInput] | FromXML[CreateFooInput]):
    return Foo(data.foo)

BlackSheep inspects the Content-Type header of the incoming request and automatically deserializes the body into the appropriate type, so the handler receives a plain CreateFooInput instance regardless of which format the client used.

Running the example

pip install blacksheep>=2.6.2 uvicorn
python server.py

The OpenAPI documentation is available at http://localhost:8000/docs once the server is running.

Generated OpenAPI specification

openapi: 3.1.0
info:
    title: Example API
    version: 0.0.1
paths:
    /foo:
        get:
            responses:
                '200':
                    description: Success response
                    content:
                        application/json:
                            schema:
                                $ref: '#/components/schemas/Foo'
            operationId: get_foo
        post:
            responses: {}
            operationId: create_foo
            parameters: []
            requestBody:
                content:
                    application/json:
                        schema:
                            $ref: '#/components/schemas/CreateFooInput'
                    application/xml:
                        schema:
                            $ref: '#/components/schemas/CreateFooInput'
                    text/xml:
                        schema:
                            $ref: '#/components/schemas/CreateFooInput'
                required: true
servers: []
components:
    schemas:
        Foo:
            type: object
            required:
            - foo
            properties:
                foo:
                    type: string
                    nullable: false
        CreateFooInput:
            type: object
            required:
            - foo
            properties:
                foo:
                    type: string
                    nullable: false
tags: []