This section highlights **venture-backed** and **company-supported** solutions from companies that sponsor FastAPI. These products provide **additional features** and **integrations** on top of high-quality generated SDKs.

By ✨ [**sponsoring FastAPI**](../help-fastapi.md#sponsor-the-author) ✨, these companies help ensure the framework and its **ecosystem** remain healthy and **sustainable**.

Django REST framework was created to be a flexible toolkit for building Web APIs using Django underneath, to improve its API capabilities.

It is used by many companies including Mozilla, Red Hat and Eventbrite.

It was one of the first examples of **automatic API documentation**, and this was specifically one of the first ideas that inspired "the search for" **FastAPI**.

/// note

	}

	if tables, err := DB.Migrator().GetTables(); err != nil {
		t.Fatalf("Failed to get database all tables, but got error %v", err)
	} else {
		for _, t1 := range []string{"users", "accounts", "pets", "companies", "toys", "languages", "tools"} {
			hasTable := false
			for _, t2 := range tables {
				if t2 == t1 {
					hasTable = true
					break
				}
			}
			if !hasTable {

public abstract interface class okhttp3/Dns {
	public static final field Companion Lokhttp3/Dns$Companion;
	public static final field SYSTEM Lokhttp3/Dns;
	public abstract fun lookup (Ljava/lang/String;)Ljava/util/List;
}

public final class okhttp3/Dns$Companion {
}

public abstract class okhttp3/EventListener {
	public static final field Companion Lokhttp3/EventListener$Companion;
	public static final field NONE Lokhttp3/EventListener;

public abstract interface class okhttp3/Dns {
	public static final field Companion Lokhttp3/Dns$Companion;
	public static final field SYSTEM Lokhttp3/Dns;
	public abstract fun lookup (Ljava/lang/String;)Ljava/util/List;
}

public final class okhttp3/Dns$Companion {
}

public abstract class okhttp3/EventListener {
	public static final field Companion Lokhttp3/EventListener$Companion;
	public static final field NONE Lokhttp3/EventListener;

import kotlin.time.Duration
import kotlin.time.Duration.Companion.milliseconds
import kotlin.time.measureTime
import mockwebserver3.MockResponse
import mockwebserver3.MockWebServer
import mockwebserver3.SocketEffect.CloseSocket
import mockwebserver3.SocketEffect.ShutdownConnection
import mockwebserver3.junit5.StartStop
import okhttp3.Headers.Companion.headersOf
import okhttp3.HttpUrl.Companion.toHttpUrl

import java.lang.IllegalArgumentException
import javax.net.ssl.SSLSocket
import okhttp3.Protocol
import okhttp3.internal.SuppressSignatureCheck
import okhttp3.internal.platform.Platform
import okhttp3.internal.platform.Platform.Companion.isAndroid

/**
 * Simple non-reflection SocketAdapter for Android Q+.
 *
 * These API assumptions make it unsuitable for use on earlier Android versions.
 */
@SuppressLint("NewApi")
@SuppressSignatureCheck

import kotlin.reflect.KClass
import okhttp3.Handshake.Companion.handshake
import okhttp3.Headers.Companion.headersOf
import okhttp3.Headers.Companion.toHeaders
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
import okhttp3.MediaType.Companion.toMediaType
import okhttp3.MediaType.Companion.toMediaTypeOrNull
import okhttp3.RequestBody.Companion.asRequestBody

internal fun Long.commonClampToInt(): Int =
  when {
    this > Int.MAX_VALUE -> Int.MAX_VALUE
    else -> toInt()
  }

internal fun CacheControl.Companion.commonForceNetwork() =
  CacheControl
    .Builder()
    .noCache()
    .build()

internal fun CacheControl.Companion.commonForceCache() =
  CacheControl
    .Builder()
    .onlyIfCached()
    .maxStale(Int.MAX_VALUE.seconds)
    .build()

import okhttp3.internal.platform.Platform
import okhttp3.internal.platform.Platform.Companion.WARN
import okhttp3.internal.toLongOrDefault
import okio.Buffer
import okio.BufferedSink
import okio.BufferedSource
import okio.ByteString.Companion.decodeBase64
import okio.ByteString.Companion.encodeUtf8
import okio.ByteString.Companion.toByteString
import okio.FileSystem
import okio.ForwardingSink
import okio.ForwardingSource