"mdx-include >=1.4.1,<2.0.0",
    "mkdocs-macros-plugin >=1.5.0",
    "mkdocs-material >=9.7.0",
    "mkdocs-redirects >=1.2.1,<1.3.0",
    "mkdocstrings[python] >=0.30.1",
    "pillow >=11.3.0",
    "python-slugify >=8.0.4",
    "pyyaml >=5.3.1,<7.0.0",
    "typer >=0.21.1",
]
docs-tests = [
    "httpx >=0.23.0,<1.0.0",
    "ruff >=0.14.14",
    # For UJSONResponse

## 0.117.0 (2025-09-20)

### Features

* ✨  Allow `None` as return type for bodiless responses. PR [#9425](https://github.com/fastapi/fastapi/pull/9425) by [@hofrob](https://github.com/hofrob).
* ✨ Allow array values for OpenAPI schema `type` field. PR [#13639](https://github.com/fastapi/fastapi/pull/13639) by [@sammasak](https://github.com/sammasak).

If the intention is to allow an issue reporter to get additional local diagnostics when running a build in their proprietary environment, then the internal property is sufficient.

Examples of properties that follow the naming rules:

* `org.gradle.experimental.declarative-common`

Properties that don’t follow the naming rules, and SHOULD be renamed:

labels.spnego_preauth_username=Pre-Auth Username
labels.spnego_preauth_password=Pre-Auth Password
labels.spnego_allow_basic=Allow Basic Auth
labels.spnego_allow_unsecure_basic=Allow Unsecure Basic Auth
labels.spnego_prompt_ntlm=Prompt NTLM
labels.spnego_allow_localhost=Allow Localhost
labels.spnego_allow_delegation=Allow Delegation
labels.spnego_exclude_dirs=Exclude Directories
labels.general_menu_entraid=Entra ID

### Events with Retries and Follow-Ups

OkHttp is resilient and can automatically recover from some connectivity failures. In this case, the `connectFailed()` event is not terminal and not followed by `callFailed()`. Event listeners will receive multiple events of the same type when retries are attempted.

* News about FastAPI and friends 🚀
* Guides 📝
* Features ✨
* Breaking changes 🚨
* Tips and tricks ✅

## Follow FastAPI on X (Twitter) { #follow-fastapi-on-x-twitter }

[Follow @fastapi on **X (Twitter)**](https://x.com/fastapi) to get the latest news about **FastAPI**. 🐦

## Star **FastAPI** in GitHub { #star-fastapi-in-github }

  /** The HTTP {@code Access-Control-Allow-Headers} header field name. */
  public static final String ACCESS_CONTROL_ALLOW_HEADERS = "Access-Control-Allow-Headers";

  /** The HTTP {@code Access-Control-Allow-Methods} header field name. */
  public static final String ACCESS_CONTROL_ALLOW_METHODS = "Access-Control-Allow-Methods";

  /** The HTTP {@code Access-Control-Allow-Origin} header field name. */

    assertEquals(2, ms.count(Color.RED));
  }

  public void testCollectionCreate() {
    Multiset<Color> ms = EnumMultiset.create(asList(Color.RED, Color.YELLOW, Color.RED));
    assertEquals(0, ms.count(Color.BLUE));
    assertEquals(1, ms.count(Color.YELLOW));
    assertEquals(2, ms.count(Color.RED));
  }

  public void testIllegalCreate() {
    Collection<Color> empty = EnumSet.noneOf(Color.class);

      Header("accept-encoding", "gzip, deflate"),
      Header("accept-language", ""),
      Header("accept-ranges", ""),
      Header("accept", ""),
      Header("access-control-allow-origin", ""),
      Header("age", ""),
      Header("allow", ""),
      Header("authorization", ""),
      Header("cache-control", ""),
      Header("content-disposition", ""),
      Header("content-encoding", ""),

These loosely follow the model set in [Google Cloud Policies](https://cloud.google.com/load-balancing/docs/ssl-policies-concepts). We [track changes](../security/tls_configuration_history.md) to this policy.

By default, OkHttp will attempt a `MODERN_TLS` connection.  However by configuring the client connectionSpecs you can allow a fall back to `COMPATIBLE_TLS` connection if the modern configuration fails.