因為這個小範例不需要任何 `await` 陳述式，我們加入 `await anyio.sleep(0)`，讓事件迴圈有機會處理取消。

對於大型或無限的串流來說，這點更為重要。

///

/// tip

與其直接回傳 `StreamingResponse`，你大概會想遵循[資料串流](./stream-data.md)中的作法，這樣更方便，並且會在底層幫你處理取消。

如果你要串流 JSON Lines，請參考教學：[串流 JSON Lines](../tutorial/stream-json-lines.md)。

///

### `FileResponse` { #fileresponse }

以非同步串流方式將檔案作為回應。

它在初始化時所需的參數與其他回應型別不同：

- `path` - 要串流的檔案路徑。

        private void writeObject(ObjectOutputStream stream) throws IOException {
      stream.defaultWriteObject();
      stream.writeObject(inverse());
    }

    @GwtIncompatible
    @J2ktIncompatible
        @SuppressWarnings("unchecked") // reading data stored by writeObject
    private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {
      stream.defaultReadObject();

import static org.mockito.Mockito.when;

import java.net.MalformedURLException;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.stream.Stream;

import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.junit.jupiter.params.ParameterizedTest;

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;

import java.nio.charset.StandardCharsets;
import java.util.stream.Stream;

import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;

      b.append(longBitsToDouble(longs.get(i)));
      if (i == iMax) {
        return b.append(']').toString();
      }
      b.append(',').append(' ');
    }
  }

  /**
   * Saves the state to a stream (that is, serializes it).
   *
   * @serialData The length of the array is emitted (int), followed by all of its elements (each a
   *     {@code double}) in the proper order.
   */

            });
        });
    }

    /**
     * Download the stemmer override dictionary file.
     * Streams the dictionary file as an octet-stream download.
     *
     * @param form The download form containing dictionary ID
     * @return Action response with file stream for download
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public ActionResponse download(final DownloadForm form) {

        );

    private void gatherBadSnippetsInFile(File file, Map<File, List<Error>> errors) {
        List<String> lines = new ArrayList<>();
        try (java.util.stream.Stream<String> stream = Files.lines(file.toPath())) {
            stream.forEach(lines::add);
        } catch (IOException ex) {
            // If a file can't be read, add an error

package org.apache.maven.execution;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import java.util.function.Predicate;
import java.util.stream.Stream;

import static java.util.stream.Collectors.toSet;

/**
 * Container for storing the request from the user to activate or deactivate certain projects and optionally fail the
 * build if those projects do not exist.
 */

        boolean p2IsMaster = p2Branches.contains("origin/master");
        boolean p2IsRelease = p2Branches.stream().anyMatch(b -> b.startsWith("origin/release"));

        if (p1IsMaster && !p2IsMaster && p2IsRelease) {
            List<String> badFiles = filesFromMerge(commit).stream()
                .filter(gitFile -> MONITORED_PATHS.stream().anyMatch(forbiddenPath -> gitFile.startsWith(forbiddenPath)))
                .collect(Collectors.toList());

                postcard.setFrom(fessConfig.getMailFromAddress(), fessConfig.getMailFromName());
                postcard.addReplyTo(fessConfig.getMailReturnPath());
                stream(toAddresses).of(stream -> stream.forEach(address -> {
                    postcard.addTo(address);
                }));
                BeanUtil.copyMapToBean(dataMap, postcard);
            });