There are several custom response classes you can use to create an instance and return them directly from your *path operations*.

Read more about it in the [FastAPI docs for Custom Response - HTML, Stream, File, others](https://fastapi.tiangolo.com/advanced/custom-response/).

You can import them directly from `fastapi.responses`:

```python
from fastapi.responses import (
    FileResponse,
    HTMLResponse,

            // Analyze timing consistency across threads
            if (!timings.isEmpty()) {
                double avgTime = timings.stream().mapToLong(Long::longValue).average().orElse(0.0);
                long maxTime = timings.stream().mapToLong(Long::longValue).max().orElse(0L);
                long minTime = timings.stream().mapToLong(Long::longValue).min().orElse(0L);

                double variance = (maxTime - minTime) / avgTime;

     *
     * @return The created OpenSearch client.
     */
    protected Client createClient() {
        final String[] hosts =
                split(address, ",").get(stream -> stream.map(String::trim).filter(StringUtil::isNotEmpty).toArray(n -> new String[n]));
        final Settings settings = Settings.builder().putList("http.hosts", hosts).build();
        return new HttpClient(settings, null);
    }

    private void loadPersistedHandles() {
        if (!Files.exists(stateDirectory)) {
            return;
        }

        try (DirectoryStream<Path> stream = Files.newDirectoryStream(stateDirectory, "*.handle")) {
            for (Path handleFile : stream) {
                try (ObjectInputStream ois = new ObjectInputStream(Files.newInputStream(handleFile))) {
                    HandleInfo info = (HandleInfo) ois.readObject();

            Trans2FindFirst2Response resp = inv.getArgument(1);
            // First response content
            FE[] res = java.util.Arrays.stream(batches.get(0)).map(FE::new).toArray(FE[]::new);
            setField(resp, jcifs.internal.smb1.trans.SmbComTransactionResponse.class, "results", res);
            setField(resp, Trans2FindFirst2Response.class, "sid", 42);

            SmbFile dest = mock(SmbFile.class);
            CIFSContext ctx = ctxWithIgnore(false);
            when(src.getContext()).thenReturn(ctx);

            // Force failure before any stream construction
            when(src.openUnshared(anyInt(), anyInt(), anyInt(), anyInt(), anyInt())).thenThrow(new SmbException("boom"));

 */
package org.codelibs.fess.crawler.processor.impl;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.lang.SystemUtil;

  }

  @Override
  public boolean wasStreamClosed() {
    return byteSink.wasStreamClosed();
  }

  @Override
  public Writer openStream() throws IOException {
    // using TestByteSink's output stream to get option behavior, so flush to it on every write
    return new FilterWriter(new OutputStreamWriter(byteSink.openStream(), UTF_8)) {
      @Override
      public void write(int c) throws IOException {
        super.write(c);

/**
 * A <code>URLStreamHandler</code> used to provide NTLM authentication
 * capabilities to the default HTTPS handler. This acts as a wrapper,
 * handling authentication and passing control to the underlying
 * stream handler.
 *
 * @deprecated {@link NtlmHttpURLConnection} is broken by design.
 */
@Deprecated
public class Handler extends jcifs.http.Handler {

    /**
     * The default HTTPS port (<code>443</code>).

import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.regex.Pattern;
import java.util.stream.Collectors;

import org.codelibs.fess.crawler.entity.OpenSearchUrlFilter;
import org.codelibs.fess.crawler.exception.CrawlerSystemException;
import org.codelibs.fess.crawler.service.UrlFilterService;