# Advanced User Guide { #advanced-user-guide }

## Additional Features { #additional-features }

The main [Tutorial - User Guide](../tutorial/index.md) should be enough to give you a tour through all the main features of **FastAPI**.

In the next sections you will see other options, configurations, and additional features.

/// tip

The next sections are **not necessarily "advanced"**.

        for (Map.Entry<String, String> additional : additionalLicenses.entrySet()) {
            String category = additional.getKey().substring(0, 5);
            String family = additional.getKey().substring(5);
            matchers.add(subStringMatcher(category, family, additional.getValue()));
        }

        },
```

When a transitioned object is restored temporarily to local MinIO instance via PostRestoreObject API, the object data is copied back from the remote tier, and additional metadata for the restored object is maintained as referenced below. Once the restore period expires, the local copy of the object is removed by the scanner during its periodic runs.

```
...
        "MetaUsr": {

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *

import pytest
from fastapi import FastAPI
from fastapi.testclient import TestClient

app = FastAPI()


@app.get("/a", responses={"hello": {"description": "Not a valid additional response"}})
async def a():
    pass  # pragma: no cover


openapi_schema = {
    "openapi": "3.1.0",
    "info": {"title": "FastAPI", "version": "0.1.0"},
    "paths": {
        "/a": {
            "get": {
                "responses": {

                "message": "This was marked as invalid and will be closed now. If this is an error, please provide additional details."
              },
              "maybe-ai": {
                "delay": 0,
                "message": "This was marked as potentially AI generated and will be closed now. If this is an error, please provide additional details, make sure to read the docs about contributing and AI."
              }

            - iter_text
            - iter_bytes
            - iter_json
            - send_text
            - send_bytes
            - send_json
            - close

## WebSockets - additional classes

Additional classes for handling WebSockets.

Provided directly by Starlette, but you can import it from `fastapi`:

```python
from fastapi.websockets import WebSocketDisconnect, WebSocketState
```

            text(
                "additional.gradle.parameters",
                "",
                display = ParameterDisplay.NORMAL,
                allowEmpty = true,
                description = "The extra gradle parameters you want to pass to this build, e.g. `-PrerunAllTests` or `--no-build-cache`",
            )
            text(
                "reverse.dep.*.additional.gradle.parameters",
                "",

# Advanced Security { #advanced-security }

## Additional Features { #additional-features }

There are some extra features to handle security apart from the ones covered in the [Tutorial - User Guide: Security](../../tutorial/security/index.md).

/// tip

The next sections are **not necessarily "advanced"**.

And it's possible that for your use case, the solution is in one of them.

///

## Read the Tutorial first { #read-the-tutorial-first }

 * }
 *
 * <p>Graph algorithms that need additional capabilities (accessing both predecessors and
 * successors, iterating over the edges, etc.) should declare their input to be of a type that
 * provides those capabilities, such as {@link Graph}, {@link ValueGraph}, or {@link Network}.
 *
 * <h3>Additional documentation</h3>
 *
 * <p>See the Guava User Guide for the {@code common.graph} package (<a