Ela será chamada pelo **FastAPI** sempre que receber uma requisição para a URL "`/ `" usando uma operação `GET`.

Neste caso, é uma função `assíncrona`.

---

Você também pode defini-la como uma função normal em vez de `async def`:

```Python hl_lines="7"
{!../../docs_src/first_steps/tutorial003.py!}
```

/// note | "Nota"

     * This method will attempt
     * to resolve SIDs using a cache and cache the results of any SIDs that
     * required resolving with the authority. SID cache entries are currently not
     * expired because under normal circumstances SID information never changes.
     *
     * @param authorityServerName
     *            The hostname of the server that should be queried. For maximum efficiency this should be the hostname

                bufferIndex += ( (AndXServerMessageBlock) this.andx ).readAndXWireFormat(buffer, bufferIndex);
            }
            else {

                /*
                 * Just a plain smb. Read it as normal.
                 */

                buffer[ bufferIndex++ ] = (byte) ( this.andx.wordCount & 0xFF );

                if ( this.andx.wordCount != 0 ) {
                    /*

dation~="recaptcha"]',b).each(function(){var d=a(this),e=document.createElement("DIV"),f=c.reCaptchaSiteKey||d.valAttr("recaptcha-sitekey"),g=c.reCaptchaTheme||d.valAttr("recaptcha-theme")||"light",h=c.reCaptchaSize||d.valAttr("recaptcha-size")||"normal",i=c.reCaptchaType||d.valAttr("recaptcha-type")||"image";if(!f)throw new Error("Google reCaptcha site key is required.");var j=grecaptcha.render(e,{sitekey:f,theme:g,size:h,type:i,callback:function(a){b.find('[data-validation~="recaptcha"]').trig...

It will be called by **FastAPI** whenever it receives a request to the URL "`/`" using a `GET` operation.

In this case, it is an `async` function.

---

You could also define it as a normal function instead of `async def`:

{* ../../docs_src/first_steps/tutorial003.py hl[7] *}

/// note

	MediumBlock = 128 * humanize.KiByte // Default r/w block size for medium sized objects.
	LargeBlock  = 1 * humanize.MiByte   // Default r/w block size for normal objects.
)

// aligned sync.Pool's
var (
	ODirectPoolLarge = sync.Pool{
		New: func() interface{} {
			b := disk.AlignedBlock(LargeBlock)
			return &b
		},
	}
	ODirectPoolMedium = sync.Pool{

### Import `HTTPException`

```Python hl_lines="1"
{!../../docs_src/handling_errors/tutorial001.py!}
```

### Raise an `HTTPException` in your code

`HTTPException` is a normal Python exception with additional data relevant for APIs.

Because it's a Python exception, you don't `return` it, you `raise` it.

	}

	for key, value := range formInputData {
		formData[key] = value
	}

	// Create the multipart form.
	var buf bytes.Buffer
	w := multipart.NewWriter(&buf)

	// Set the normal formData
	for k, v := range formData {
		w.WriteField(k, v)
	}
	// Set the File formData
	writer, err := w.CreateFormFile("file", "upload.txt")
	if err != nil {
		// return nil, err
		return nil, err

$font-family-base;\n  // We deliberately do NOT reset font-size or word-wrap.\n  font-style: normal;\n  font-weight: $font-weight-normal;\n  line-height: $line-height-base;\n  text-align: left; // Fallback for where `start` is not supported\n  text-align: start;\n  text-decoration: none;\n  text-shadow: none;\n  text-transform: none;\n  letter-spacing: normal;\n  word-break: normal;\n  white-space: normal;\n  word-spacing: normal;\n  line-break: auto;\n}\n",".popover {\n  position: absolute;\n  top: 0;\n  left:...

          "synonyms_path": "${fess.dictionary.path}synonym.txt"
        }
      },
      "tokenizer": {
        "japanese_tokenizer": {
          "type": "fess_japanese_reloadable_tokenizer",
          "mode": "normal",
          "user_dictionary": "${fess.dictionary.path}ja/kuromoji.txt",
          "discard_punctuation": false,
          "reload_interval":"1m"
        },
        "korean_tokenizer": {