Then APIStar stopped to exist as a server and Starlette was created, and was a new better foundation for such a system. That was the final inspiration to build **FastAPI**.

    I consider **FastAPI** a "spiritual successor" to APIStar, while improving and increasing the features, typing system, and other parts, based on the learnings from all these previous tools.

## Used by **FastAPI**

    override val descriptor: PropertySetterDescriptor? by cached {
        val bindingContext = analysisContext.analyze(psi, AnalysisMode.PARTIAL)
        bindingContext[BindingContext.PROPERTY_ACCESSOR, psi] as? PropertySetterDescriptor
    }

    override val modality: Modality
        get() = withValidityAssertion { psi.property.ktModality ?: descriptor?.ktModality ?: Modality.FINAL }

     European Parliament and of the Council of 11 March 1996 on the legal
     protection of databases, and under any national implementation
     thereof, including any amended or successor version of such
     directive); and
vii. other similar, equivalent or corresponding rights throughout the
     world based on applicable law or treaty, and any national
     implementations thereof.

    // Send messages until the client's outgoing buffer overflows!
    val message: ByteString = ByteString.of(*ByteArray(1024 * 1024))
    var messageCount: Long = 0
    while (true) {
      val success = webSocket.send(message)
      if (!success) break
      messageCount++
      val queueSize = webSocket.queueSize()
      assertThat(queueSize).isBetween(0L, messageCount * message.size)
      // Expect to fail before enqueueing 32 MiB.

Das ist vergleichbar mit den HTTP-Statuscodes im Bereich 200 (von 200 bis 299). Diese „200“er Statuscodes bedeuten, dass der Request in einem bestimmten Aspekt ein „Success“ („Erfolg“) war.

Die Statuscodes im 400er-Bereich bedeuten hingegen, dass es einen Fehler gab.

Erinnern Sie sich an all diese **404 Not Found** Fehler (und Witze)?

## `HTTPException` verwenden

) : KtValueParameterSymbol(), KtFe10Symbol {
    val descriptor: VariableDescriptor? by cached {
        val bindingContext = analysisContext.analyze(accessorPsi, AnalysisMode.PARTIAL)
        bindingContext[BindingContext.PROPERTY_ACCESSOR, accessorPsi]?.valueParameters?.single()
    }

    override val origin: KtSymbolOrigin
        get() = withValidityAssertion { KtSymbolOrigin.SOURCE_MEMBER_GENERATED }

    override val hasDefaultValue: Boolean

        JsNameOnPrimaryConstructorProhibitedImpl(
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirJsErrors.JS_NAME_ON_ACCESSOR_AND_PROPERTY) { firDiagnostic ->
        JsNameOnAccessorAndPropertyImpl(
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }

  // More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
  // +optional
  optional ListMeta metadata = 1;

  // Status of the operation.
  // One of: "Success" or "Failure".
  // More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#spec-and-status
  // +optional
  optional string status = 2;

Isso é bastante similar ao caso do HTTP status code 200 (do 200 ao 299). Esses "200" status codes significam que, de algum modo, houve sucesso na requisição.

Os status codes na faixa dos 400 significam que houve um erro por parte do cliente.

Você se lembra de todos aqueles erros (e piadas) a respeito do "**404 Not Found**"?

## Use o `HTTPException`

import org.jetbrains.kotlin.types.error.ErrorUtils

internal val MemberDescriptor.ktSymbolKind: KtSymbolKind
    get() {
        return when (this) {
            is PropertyAccessorDescriptor -> KtSymbolKind.ACCESSOR
            is SamConstructorDescriptor -> KtSymbolKind.SAM_CONSTRUCTOR
            else -> when (containingDeclaration) {
                is PackageFragmentDescriptor -> KtSymbolKind.TOP_LEVEL