Custom response classes in FastAPI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the base class for custom responses in FastAPI.

FastAPI

from fastapi.responses import [1]

Drag options to blanks, or click blank then click option'

AJSONResponse

BHTMLResponse

CResponse

DRedirectResponse

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing a specific response class like JSONResponse instead of the base Response class.

The Response class is the base class for creating custom response classes in FastAPI.

2fill in blank

medium

Complete the code to create a custom response class named MyResponse inheriting from the base response class.

FastAPI

class MyResponse([1]):
    def __init__(self, content: str):
        super().__init__(content=content, media_type="text/custom")

Drag options to blanks, or click blank then click option'

AResponse

BJSONResponse

CHTMLResponse

DPlainTextResponse

Attempts:

3 left

💡 Hint

Common Mistakes

Inheriting from a specific response class instead of the base Response class.

Custom response classes should inherit from Response to define their own behavior.

3fill in blank

hard

Fix the error in the custom response class by completing the method that returns the response body as bytes.

FastAPI

class MyResponse(Response):
    def __init__(self, content: str):
        super().__init__(content=content, media_type="text/custom")

    def [1](self) -> bytes:
        return self.content.encode("utf-8")

Drag options to blanks, or click blank then click option'

Arender

Bget_body

Cto_bytes

Dcontent_bytes

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method name that FastAPI does not recognize for rendering response content.

The render method is used in FastAPI custom responses to convert content to bytes.

4fill in blank

hard

Fill both blanks to create a FastAPI route that returns the custom response with content 'Hello'.

FastAPI

from fastapi import FastAPI

app = [2]()

@app.get("/custom")
async def custom_route():
    return [1]("Hello")  # Use custom response class

Drag options to blanks, or click blank then click option'

AMyResponse

BFastAPI

CResponse

DJSONResponse

Attempts:

3 left

💡 Hint

Common Mistakes

Returning the base Response class instead of the custom one.

Reassigning app incorrectly.

The route should return an instance of the custom response class MyResponse. The app is created by calling FastAPI().

5fill in blank

hard

Fill all three blanks to define a custom response class that sets a custom header and returns content as bytes.

FastAPI

from fastapi.responses import Response

class CustomHeaderResponse([1]):
    def __init__(self, content: str):
        headers = {"X-Custom-Header": [2]
        super().__init__(content=content, media_type="text/custom", headers=headers)

    def [3](self) -> bytes:
        return self.content.encode("utf-8")

Drag options to blanks, or click blank then click option'

AResponse

B"MyValue"

Crender

DJSONResponse

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting the header value string.

Using the wrong method name instead of render.

The custom response class inherits from Response, sets a header string value, and implements the render method to return bytes.