# Functionaliteit

## FastAPI functionaliteit

**FastAPI** biedt je het volgende:

### Gebaseerd op open standaarden

participant handler as Exception handler
participant dep as Dep with yield
participant operation as Path Operation
participant tasks as Background tasks

    Note over client,operation: Can raise exceptions, including HTTPException
    client ->> dep: Start request
    Note over dep: Run code up to yield
    opt raise Exception
        dep -->> handler: Raise Exception
        handler -->> client: HTTP error response
    end

    Client->>Proxy: HTTPS Request<br/>Host: mysuperapp.com<br/>Path: /items

    Note over Proxy: Proxy adds forwarded headers

    Proxy->>Server: HTTP Request<br/>X-Forwarded-For: [client IP]<br/>X-Forwarded-Proto: https<br/>X-Forwarded-Host: mysuperapp.com<br/>Path: /items

    Note over Server: Server interprets headers<br/>(if --forwarded-allow-ips is set)

Das machen Sie mit modernen Standard-Python-Typen.

Sie müssen keine neue Syntax, Methoden oder Klassen einer bestimmten Bibliothek usw. lernen.

Nur Standard-**Python+**.

Zum Beispiel für ein `int`:

```Python
item_id: int
```

oder für ein komplexeres `Item`-Modell:

```Python
item: Item
```

... und mit dieser einen Deklaration erhalten Sie:

* It returns an object of type `HTTPBasicCredentials`:
    * It contains the `username` and `password` sent.

{* ../../docs_src/security/tutorial006_an_py39.py hl[4,8,12] *}

When you try to open the URL for the first time (or click the "Execute" button in the docs) the browser will ask you for your username and password:

<img src="/img/tutorial/security/image12.png">

## Check the username { #check-the-username }

	case writeMode:
		defer updateOSMetrics(osMetricOpenFileWFd, name)(err)
	default:
		defer updateOSMetrics(osMetricOpenFileRFd, name)(err)
	}
	var e error
	fd, e = syscall.Open(name, flag|syscall.O_CLOEXEC, uint32(perm))
	if e != nil {
		return -1, &os.PathError{Op: "open", Path: name, Err: e}
	}
	return fd, nil
}

// Forked from Golang but chooses to avoid performing lookup
//
// osMkdirAll creates a directory named path,

---

"_**Netflix** is pleased to announce the open-source release of our **crisis management** orchestration framework: **Dispatch**! [built with **FastAPI**]_"

<div style="text-align: right; margin-right: 10%;">Kevin Glisson, Marc Vilanova, Forest Monsen - <strong>Netflix</strong> <a href="https://netflixtechblog.com/introducing-dispatch-da4b8a2a8072" target="_blank"><small>(ref)</small></a></div>

---

"_I’m over the moon excited about **FastAPI**. It’s so fun!_"

			newInfos = append(newInfos, infos[i])
		} else {
			scanningDisks = append(scanningDisks, disks[i])
			scanningInfos = append(scanningInfos, infos[i])
		}
	}

	// Prefer non-scanning disks over disks which are currently being scanned.
	newDisks = append(newDisks, scanningDisks...)
	newInfos = append(newInfos, scanningInfos...)

	/// Then add healing disks.
	newDisks = append(newDisks, healingDisks...)

            <version>0.8.0</version>
            <extensions>true</extensions>
          </plugin>
        </plugins>
      </build>
    </profile>
    <profile>
      <id>suppress-open-jre-modules-for-toolchain-1.8</id>
      <activation>
        <property>
          <name>surefire.toolchain.version</name>
          <!-- the value provided by java.specification.version -->
          <value>1.8</value>

            <version>0.8.0</version>
            <extensions>true</extensions>
          </plugin>
        </plugins>
      </build>
    </profile>
    <profile>
      <id>suppress-open-jre-modules-for-toolchain-1.8</id>
      <activation>
        <property>
          <name>surefire.toolchain.version</name>
          <!-- the value provided by java.specification.version -->
          <value>1.8</value>