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CHANGELOG/CHANGELOG-1.16.md

  - `response.patch` and `response.patchType` are not permitted from validating admission webhooks
  - `apiVersion: "admission.k8s.io/v1"` is required
  - `kind: "AdmissionReview"` is required
  - `response.uid: "<value of request.uid>"` is required

Created: Fri Apr 03 09:05:14 GMT 2026

- Last Modified: Wed Oct 23 20:13:20 GMT 2024

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github.com/tiangolo/fastapi

docs_src/websockets_/tutorial002_an_py310.py

from typing import Annotated

from fastapi import (
    Cookie,
    Depends,
    FastAPI,
    Query,
    WebSocket,
    WebSocketException,
    status,
)
from fastapi.responses import HTMLResponse

app = FastAPI()

html = """
<!DOCTYPE html>
<html>
    <head>
        <title>Chat</title>
    </head>
    <body>
        <h1>WebSocket Chat</h1>
        <form action="" onsubmit="sendMessage(event)">

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Fri Feb 27 12:34:37 GMT 2026

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github.com/tiangolo/fastapi

docs_src/websockets_/tutorial002_py310.py

from fastapi import (
    Cookie,
    Depends,
    FastAPI,
    Query,
    WebSocket,
    WebSocketException,
    status,
)
from fastapi.responses import HTMLResponse

app = FastAPI()

html = """
<!DOCTYPE html>
<html>
    <head>
        <title>Chat</title>
    </head>
    <body>
        <h1>WebSocket Chat</h1>
        <form action="" onsubmit="sendMessage(event)">

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Fri Feb 27 12:34:37 GMT 2026

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github.com/square/okhttp

okhttp/src/jvmTest/kotlin/okhttp3/URLConnectionTest.kt

      val code = response.code
      if (code != HTTP_TEMP_REDIRECT && code != HTTP_PERM_REDIRECT) return response
      val method = response.request.method
      if (method == "GET" || method == "HEAD") return response
      val location = response.header("Location") ?: return response
      return response
        .newBuilder()
        .removeHeader("Location")
        .header("LegacyRedirectInterceptor-Location", location)

Created: Fri Apr 03 11:42:14 GMT 2026

- Last Modified: Tue Jan 27 09:00:39 GMT 2026

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github.com/tiangolo/fastapi

docs/es/docs/advanced/dataclasses.md

# Usando Dataclasses { #using-dataclasses }

FastAPI está construido sobre **Pydantic**, y te he estado mostrando cómo usar modelos de Pydantic para declarar requests y responses.

Pero FastAPI también soporta el uso de [`dataclasses`](https://docs.python.org/3/library/dataclasses.html) de la misma manera:

{* ../../docs_src/dataclasses_/tutorial001_py310.py hl[1,6:11,18:19] *}

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Thu Mar 19 18:15:55 GMT 2026

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github.com/tiangolo/fastapi

tests/test_tutorial/test_body_fields/test_tutorial001.py

    assert response.status_code == 200, response.text
    assert response.json() == snapshot(
        {
            "openapi": "3.1.0",
            "info": {"title": "FastAPI", "version": "0.1.0"},
            "paths": {
                "/items/{item_id}": {
                    "put": {
                        "responses": {
                            "200": {
                                "description": "Successful Response",

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Thu Feb 12 13:19:43 GMT 2026

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github.com/tiangolo/fastapi

tests/test_dependency_after_yield_streaming.py

client = TestClient(app)


def test_regular_no_stream():
    response = client.get("/data")
    assert response.json() == ["foo", "bar", "baz"]


def test_stream_simple():
    response = client.get("/stream-simple")
    assert response.text == "xyz"


def test_stream_session():
    response = client.get("/stream-session")
    assert response.text == "foobarbaz"


def test_broken_session_data():

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Wed Dec 17 21:25:59 GMT 2025

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github.com/tiangolo/fastapi

tests/test_tutorial/test_body_multiple_params/test_tutorial005.py

                "type": "missing",
            },
        ],
    }


def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == snapshot(
        {
            "info": {
                "title": "FastAPI",
                "version": "0.1.0",
            },

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Thu Feb 12 13:19:43 GMT 2026

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github.com/tiangolo/fastapi

tests/test_response_dependency.py


def test_response_dependency_chain():
    """Response dependency should work in a chain of dependencies."""
    app = FastAPI()

    def first_modifier(response: Response) -> Response:
        response.headers["X-First"] = "1"
        return response

    def second_modifier(
        response: Annotated[Response, Depends(first_modifier)],
    ) -> Response:
        response.headers["X-Second"] = "2"
        return response

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Thu Feb 05 18:23:16 GMT 2026

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github.com/tiangolo/fastapi

tests/test_default_response_class_router.py

        response = client.get("/a")
    assert response.json() == {"msg": "Hello A"}
    assert response.headers["content-type"] == json_type


def test_router_a_override():
    with client:
        response = client.get("/a/override")
    assert response.content == b"Hello A"
    assert response.headers["content-type"] == text_type


def test_router_a_a():
    with client:
        response = client.get("/a/a")

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Sun Mar 01 20:49:20 GMT 2020

- 5K bytes

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