上記の例では必要な部分を全て示していますが、あまり便利ではありません。`item` を直接返すことができるし、**FastAPI** はそれを `dict` に変換して `JSONResponse`　に含めてくれるなど。すべて、デフォルトの動作です。

では、これを使ってカスタムレスポンスをどう返すか見てみましょう。

<a href="https://en.wikipedia.org/wiki/XML" class="external-link" target="_blank">XML</a>レスポンスを返したいとしましょう。

XMLを文字列にし、`Response` に含め、それを返します。

{* ../../docs_src/response_directly/tutorial002.py hl[1,18] *}

## 備考

`Response` を直接返す場合、バリデーションや、変換 (シリアライズ) や、自動ドキュメントは行われません。

    @Resource
    private FileTransformer fileTransformer;

    @Resource
    private CrawlerContainer crawlerContainer;

    @Override
    protected String prepareConfigFile() {
        return "crawler.xml";
    }

    public void test_execute_web() throws Exception {
        final CrawlerWebServer server = new CrawlerWebServer(7070);
        server.start();

        final String url = "http://localhost:7070/";

import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.maven.RepositoryUtils;
import org.apache.maven.api.xml.XmlNode;
import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.InvalidRepositoryException;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.bridge.MavenRepositorySystem;

  xml.namespace="http://maven.apache.org/SETTINGS/${version}"
  xml.schemaLocation="https://maven.apache.org/xsd/settings-${version}.xsd">
  <id>settings</id>
  <name>Settings</name>
  <description>
    <![CDATA[
    <p>This is a reference for the user-specific configuration for Maven.</p>
    <p>Includes things that should not be distributed with the <code>pom.xml</code> file, such as developer identity, along with

import java.io.Writer;
import java.util.Map;

import org.apache.maven.model.Model;

/**
 * Handles serialization of a model into some kind of textual format like XML.
 *
 * @deprecated use {@code org.apache.maven.api.services.xml.ModelXmlFactory} instead
 */
@Deprecated(since = "4.0.0")
public interface ModelWriter {

    /**

import org.apache.maven.execution.MavenExecutionRequest;
import org.apache.maven.project.MavenProject;
import org.apache.maven.project.ProjectBuildingException;

/**
 * Facade to select projects for a given set of pom.xml files.
 */
public interface ProjectsSelector {
    /**
     * Select Maven projects from a list of POM files.
     * @param files List of POM files.
     * @param request The {@link MavenExecutionRequest}

<?xml version="1.0" encoding="UTF-8"?>

<!--
  ~ Licensed to the Apache Software Foundation (ASF) under one
  ~ or more contributor license agreements.  See the NOTICE file
  ~ distributed with this work for additional information
  ~ regarding copyright ownership.  The ASF licenses this file
  ~ to you under the Apache License, Version 2.0 (the
  ~ "License"); you may not use this file except in compliance

            @Override
            public Object execute(String expression, Object value) {
                if (value != null) {
                    // we're going to parse this back in as XML so we need to escape XML markup
                    value = value.toString()
                            .replace("&", "&")
                            .replace("<", "&lt;")
                            .replace(">", "&gt;");

 * context (such as an XML document). Typically (but not always), the inverse process of
 * "unescaping" the text is performed automatically by the relevant parser.
 *
 * <p>For example, an XML escaper would convert the literal string {@code "Foo<Bar>"} into {@code
 * "Foo&lt;Bar&gt;"} to prevent {@code "<Bar>"} from being confused with an XML tag. When the

import org.apache.maven.api.annotations.Nonnull;
import org.apache.maven.api.model.PluginExecution;
import org.apache.maven.api.plugin.descriptor.MojoDescriptor;
import org.apache.maven.api.xml.XmlNode;

/**
 * A {@code MojoExecution} represents a single execution of a Maven Plugin during a given build.
 * An instance of this object is bound to the {@link org.apache.maven.api.di.MojoExecutionScoped}