> ## Documentation Index
> Fetch the complete documentation index at: https://ppio.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# 监视目录变化

> 查阅 PPIO Agent 沙箱监视目录变化的归档指南，了解该版本文件系统事件的使用方式，为维护文件变化响应流程提供参考。

本节演示如何监视目录下文件的变化。

```js JavaScript & TypeScript icon="js" theme={null}
import { Sandbox, FilesystemEventType } from 'ppio-sandbox/code-interpreter'

const sandbox = await Sandbox.create()
const dirname = '/tmp'

// 开始监视目录的变化
const handle = await sandbox.files.watchDir(dirname, async (event) => {
  console.log(`got event: ${event.type} - ${event.name}`)
  if (event.type === FilesystemEventType.WRITE) {
    console.log(`wrote to file ${event.name}`)
  }
})

// 触发文件写入事件
await sandbox.files.write(`${dirname}/test-file`, 'test-file-content')

// 停止监视
handle.stop()

await sandbox.kill()
```

```python Python icon="python" theme={null}
from ppio_sandbox.code_interpreter import Sandbox, FilesystemEventType

sandbox = Sandbox.create()
dirname = '/tmp'

# 监视目录的变化
handle = sandbox.files.watch_dir(dirname)
# 触发文件写入事件
sandbox.files.write(f"{dirname}/test-file", "test-file-content")

# 获取自上次调用 `get_new_events()` 以来的最新事件
events = handle.get_new_events()
for event in events:
  print(f"got event: {event.type} - {event.name}")
  if event.type == FilesystemEventType.WRITE:
    print(f"wrote to file {event.name}")

# 停止监视
handle.stop()

sandbox.kill()
```

## 递归监视

如果需要监视到目录下子文件夹（包括多级嵌套的文件夹）内容的变化，您可以使用 `recursive` 参数启用 “递归监视”。

> [!NOTE]
>
> 当快速创建新文件夹时（例如多级的文件夹路径），除了 `CREATE` 之外的事件可能不会被触发。为了避免这种行为，请提前创建所需的文件夹结构。

```js JavaScript & TypeScript icon="js" theme={null}
import { Sandbox, FilesystemEventType } from 'ppio-sandbox/code-interpreter'

const sandbox = await Sandbox.create()
const dirname = '/tmp'

// 开始监视目录的变化
const handle = await sandbox.files.watchDir(dirname, async (event) => {
  console.log(`got event: ${event.type} - ${event.name}`)
  if (event.type === FilesystemEventType.WRITE) {
    console.log(`wrote to file ${event.name}`)
  }
}, {
  recursive: true
})

// 触发文件写入事件
await sandbox.files.write(`${dirname}/test-folder/test-file`, 'test-file-content')

// 停止监视
handle.stop()

await sandbox.kill()
```

```python Python icon="python" theme={null}
from ppio_sandbox.code_interpreter import Sandbox, FilesystemEventType

sandbox = Sandbox.create()
dirname = '/tmp'

# 监视目录的变化
handle = sandbox.files.watch_dir(dirname, recursive=True)
# 触发文件写入事件
sandbox.files.write(f"{dirname}/test-folder/test-file", "test-file-content")

# 获取自上次 `get_new_events()` 调用以来的最新事件
events = handle.get_new_events()
for event in events:
  print(f"got event: {event.type} - {event.name}")
  if event.type == FilesystemEventType.WRITE:
    print(f"wrote to file {event.name}")

# 停止监视
handle.stop()

sandbox.kill()
```


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