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

# Deno

> 使用 Deno 沙盒后端与 deepagents 配合，在 Linux 微虚拟机中实现隔离代码执行

[Deno Deploy](https://deno.com)提供隔离的代码执行的 Linux 微型虚拟机。最适合 Deno 和 JavaScript 工作负载。

## 安装

```bash npm theme={null}
npm install @langchain/deno
```

```bash yarn theme={null}
yarn add @langchain/deno
```

```bash pnpm theme={null}
pnpm add @langchain/deno
```

### 身份验证

从 [app.deno.com](https://app.deno.com) → 设置 → 组织令牌 获取您的令牌。

```bash theme={null}
export DENO_DEPLOY_TOKEN=your_token
```

或者直接传递凭证：

```typescript theme={null}
const sandbox = await DenoSandbox.create({
  auth: { token: "your-token-here" },
});
```

## 与 deepagents 一起使用

:::js

```typescript theme={null}
import { createDeepAgent } from "deepagents";
import { ChatAnthropic } from "@langchain/anthropic";
import { DenoSandbox } from "@langchain/deno";

const sandbox = await DenoSandbox.create({
  memoryMb: 1024,
  lifetime: "10m",
});

try {
  const agent = createDeepAgent({
    model: new ChatAnthropic({ model: "claude-sonnet-4-6" }),
    systemPrompt: "You are a coding assistant with sandbox access.",
    backend: sandbox,
  });

  const result = await agent.invoke({
    messages: [{ role: "user", content: "Create a hello world Deno app and run it" }],
  });
} finally {
  await sandbox.close();
}
```

:::

## 独立使用

:::js

```typescript theme={null}
import { DenoSandbox } from "@langchain/deno";

const sandbox = await DenoSandbox.create({
  memoryMb: 1024,
  lifetime: "10m",
});

const result = await sandbox.execute("deno --version");
console.log(result.output);

await sandbox.close();
```

:::

## 配置

| 选项 | 类型 | 默认值 | 描述 |
| - | - | - | - |
| `memoryMb` | `number` | `768` | 内存（MB）（768-4096） |
| `lifetime` | `"session" \| string` | `"session"` | 生命周期（`"session"`、`"5m"`、`"30s"`） |
| `region` | `string` | - | 区域。选项：`"ams" \| "ord"` |

### 可用区域

| 区域代码 | 位置 |
| - | - |
| `ams` | 阿姆斯特丹 |
| `ord` | 芝加哥 |

### 生命周期选项

* `"session"`（默认）：当您关闭/释放客户端时，沙盒将关闭
* 持续时间字符串：保持沙盒在特定时间内运行（例如，`"5m"`、`"30s"`）

## 访问 Deno SDK

对于高级功能，访问底层的 Deno SDK：

:::js

```typescript theme={null}
const denoSandbox = await DenoSandbox.create();
const sdk = denoSandbox.sandbox;

// Expose HTTP port
const url = await sdk.exposeHttp({ port: 3000 });

// Expose SSH
const ssh = await sdk.exposeSsh();

// Evaluate JavaScript
const result = await sdk.eval("1 + 2");

// Set environment variables
await sdk.env.set("API_KEY", "secret");

// Shell template literals
const output = await sdk.sh`echo "Hello from Deno!"`.text();

// Start a JavaScript runtime
const runtime = await sdk.createJsRuntime({ entrypoint: "server.ts" });
```

:::

## 重新连接到现有沙盒

重新连接需要基于持续时间的生命周期（不是 `"session"`）：

:::js

```typescript theme={null}
// Create with duration lifetime
const sandbox = await DenoSandbox.create({
  memoryMb: 1024,
  lifetime: "30m",
});
const sandboxId = sandbox.id;
await sandbox.close(); // Close connection, sandbox keeps running

// Later: reconnect
const reconnected = await DenoSandbox.connect(sandboxId);
const result = await reconnected.execute("ls -la");
```

:::

## 工厂函数

:::js

```typescript theme={null}
import { createDenoSandboxFactory, createDenoSandboxFactoryFromSandbox } from "@langchain/deno";

// Create new sandbox per invocation
const factory = createDenoSandboxFactory({ memoryMb: 1024 });

// Or reuse an existing sandbox across invocations
const sandbox = await DenoSandbox.create();
const reuseFactory = createDenoSandboxFactoryFromSandbox(sandbox);
```

:::

## 错误处理

```typescript theme={null}
import { DenoSandboxError } from "@langchain/deno";

try {
  await sandbox.execute("some command");
} catch (error) {
  if (error instanceof DenoSandboxError) {
    switch (error.code) {
      case "NOT_INITIALIZED":
        await sandbox.initialize();
        break;
      case "COMMAND_TIMEOUT":
        console.error("Command took too long");
        break;
      case "AUTHENTICATION_FAILED":
        console.error("Check your Deno Deploy token");
        break;
    }
  }
}
```

### 错误代码

| 代码 | 描述 |
| - | - |
| `NOT_INITIALIZED` | 沙盒未初始化 - 调用 `initialize()` |
| `ALREADY_INITIALIZED` | 无法重复初始化 |
| `AUTHENTICATION_FAILED` | 无效或缺少 Deno Deploy 令牌 |
| `SANDBOX_CREATION_FAILED` | 创建沙盒失败 |
| `SANDBOX_NOT_FOUND` | 未找到沙盒 ID 或已过期 |
| `COMMAND_TIMEOUT` | 命令执行超时 |
| `COMMAND_FAILED` | 命令执行失败 |
| `FILE_OPERATION_FAILED` | 文件读写失败 |
| `RESOURCE_LIMIT_EXCEEDED` | 超出 CPU、内存或存储限制 |

## 限制和约束

| 约束 | 值 |
| - | - |
| 最小内存 | 768 MB |
| 最大内存 | 4096 MB (4 GB) |
| 磁盘空间 | 10 GB |
| vCPU | 2 |
| 工作目录 | `/home/app` |
| 网络访问 | 完全（默认） |

## 环境变量

| 变量 | 描述 |
| - | - |
| `DENO_DEPLOY_TOKEN` | Deno Deploy 组织访问令牌 |

***

> 官方原文：[src/oss/javascript/integrations/providers/deno.mdx](https://github.com/langchain-ai/docs/blob/main/src/oss/javascript/integrations/providers/deno.mdx) · 非官方翻译，译文由 AI 生成，以英文原文为准。


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