## Usa `CORSMiddleware` { #use-corsmiddleware }

Puedes configurarlo en tu aplicación **FastAPI** usando el `CORSMiddleware`.

* Importa `CORSMiddleware`.
* Crea una lista de orígenes permitidos (como strings).
* Agrégalo como un "middleware" a tu aplicación **FastAPI**.

También puedes especificar si tu backend permite:

import static org.mockito.ArgumentMatchers.anyString;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.doNothing;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;

package org.codelibs.fess.opensearch.user.cbean.ca.bs;

import org.codelibs.fess.opensearch.user.allcommon.EsAbstractConditionAggregation;
import org.codelibs.fess.opensearch.user.allcommon.EsAbstractConditionQuery;
import org.codelibs.fess.opensearch.user.cbean.ca.GroupCA;
import org.codelibs.fess.opensearch.user.cbean.cq.GroupCQ;
import org.codelibs.fess.opensearch.user.cbean.cq.bs.BsGroupCQ;

package gradlebuild.binarycompatibility.rules

import groovy.transform.CompileStatic
import japicmp.model.JApiClass
import japicmp.model.JApiCompatibility
import japicmp.model.JApiConstructor
import japicmp.model.JApiField
import japicmp.model.JApiMethod
import javassist.CtBehavior
import javassist.CtClass
import javassist.CtConstructor
import javassist.CtField
import javassist.CtMethod
import javassist.Modifier

 */
package okhttp3.osgi

import aQute.bnd.build.Project
import aQute.bnd.build.Workspace
import aQute.bnd.build.model.BndEditModel
import aQute.bnd.deployer.repository.LocalIndexedRepo
import aQute.bnd.osgi.Constants
import aQute.bnd.service.RepositoryPlugin
import biz.aQute.resolve.Bndrun
import java.io.File
import okio.FileSystem
import okio.Path
import okio.Path.Companion.toPath

 */
package org.codelibs.fess.entity;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.stream.StreamUtil;
import org.codelibs.fess.exception.InvalidQueryException;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.util.ComponentUtil;
import org.lastaflute.core.message.UserMessages;

package jcifs.smb;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertSame;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verifyNoInteractions;

import java.lang.reflect.Field;

import org.junit.jupiter.api.DisplayName;

 */

package com.google.common.collect.testing.google;

import static com.google.common.collect.Lists.charactersOf;
import static java.lang.System.arraycopy;
import static java.util.Arrays.asList;

import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.testing.TestCharacterListGenerator;
import com.google.common.collect.testing.TestListGenerator;

 */
package okhttp3.internal.platform

import assertk.assertThat
import assertk.assertions.isNotNull
import assertk.assertions.isNull
import okhttp3.internal.platform.Jdk8WithJettyBootPlatform.Companion.buildIfSupported
import okhttp3.testing.PlatformRule
import org.junit.jupiter.api.Assumptions.assumeFalse
import org.junit.jupiter.api.Assumptions.assumeTrue
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.extension.RegisterExtension

import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;

import org.apache.catalina.connector.ClientAbortException;