If you are streaming JSON Lines, follow the [Stream JSON Lines](../tutorial/stream-json-lines.md) tutorial.

///

### `FileResponse` { #fileresponse }

Asynchronously streams a file as the response.

@REM   MAVEN_SKIP_RC       (Optional) Flag to disable loading of mavenrc files.
@REM -----------------------------------------------------------------------------

@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
@echo off
@REM set title of command window
title %0
@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
@if "%MAVEN_BATCH_ECHO%"=="on" echo %MAVEN_BATCH_ECHO%

@setlocal

        stopwordsFile.reload(null, is);

        assertEquals(2, stopwordsFile.stopwordsItemList.size());
        // The content creates two lines: "word\n1" and "word\"
        assertTrue(stopwordsFile.stopwordsItemList.stream().anyMatch(item -> item.getInput().contains("word")));
    }

    // Test StopwordsUpdater inner class
    @Test

# 串流資料 { #stream-data }

如果你要串流可用 JSON 結構化的資料，應該[串流 JSON Lines](../tutorial/stream-json-lines.md)。

但如果你想串流純二進位資料或字串，以下是做法。

/// info

已在 FastAPI 0.134.0 新增。

///

## 使用情境 { #use-cases }

當你想串流純字串時可以用這個機制，例如直接轉發來自 AI LLM 服務的輸出。

你也可以用它來串流大型二進位檔案，邊讀邊將每個區塊（chunk）串流出去，而不必一次把整個檔案載入記憶體。

你也可以用同樣方式串流視訊或音訊，甚至可以在處理的同時即時產生並傳送。

## 使用 `yield` 的 `StreamingResponse` { #a-streamingresponse-with-yield }

Only differences from the base Go toolchain defaults are reported.

When testing a package, `//go:debug` lines in the `*_test.go`
files are treated as directives for the test's main package.
In any other context, `//go:debug` lines are ignored by the toolchain;
`go` `vet` reports such lines as misplaced.

## GODEBUG History {#history}

对于大型或无限流，这一点更为重要。

///

/// tip | 提示

与其直接返回 `StreamingResponse`，更推荐遵循 [流式数据](./stream-data.md) 的写法，它更方便并在幕后为你处理取消。

如果你在流式传输 JSON Lines，请参阅教程：[流式传输 JSON Lines](../tutorial/stream-json-lines.md)。

///

### `FileResponse` { #fileresponse }

异步传输文件作为响应。

与其他响应类型相比，接受不同的参数集进行实例化：

* `path` - 要流式传输的文件的文件路径。
* `headers` - 任何自定义响应头，传入字典类型。

  /**
   * Line Feed ('\n'): A format effector which controls the movement of the printing position to the
   * next printing line. (Applicable also to display devices.) Where appropriate, this character may
   * have the meaning "New Line" (NL), a format effector which controls the movement of the printing
   * point to the first printing position on the next printing line. Use of this convention requires

)
if not exist "%FILE_ARG%" (
  echo POM file "%FILE_ARG%" specified the -f/--file command-line argument does not exist >&2
  goto error
)
if exist "%FILE_ARG%\*" (
  set "POM_DIR=%FILE_ARG%"
) else (
  call :get_directory_from_file "%FILE_ARG%"
)
if not exist "%POM_DIR%" (
  echo Directory "%POM_DIR%" extracted from the -f/--file command-line argument "%FILE_ARG%" does not exist >&2
  goto error
)
set "WDIR=%POM_DIR%"

    ): BuildFileMutation {
        val lines = buildFile.readText().lines()

        val start = lines.indexOfFirst {
            Regex("\\s+computedRuntimes\\s+\\{").matches(it)
        }
        if (start == -1) {
            return BuildFileMutation.Failure("Missing computedRuntimes block for $projectPath: ${buildFile.asClickableFileUrl()}")
        }

        val end = lines.indexOfFirst(start + 1) {

   * Returns a splitter that considers any subsequence matching {@code pattern} to be a separator.
   * For example, {@code Splitter.on(Pattern.compile("\r?\n")).split(entireFile)} splits a string
   * into lines whether it uses DOS-style or UNIX-style line terminators.
   *
   * @param separatorPattern the pattern that determines whether a subsequence is a separator. This
   *     pattern may not match the empty string.