Workers AI 允许您在 Cloudflare 网络上从您自己的代码运行机器学习模型。

这将帮助您开始使用 ChatCloudflareWorkersAI 聊天模型。有关所有 ChatCloudflareWorkersAI 功能和配置的详细文档，请前往 API 参考.

概述

集成详情

模型特性

请参阅下方表格标题中的链接，了解如何使用特定功能。

设置

要访问 Cloudflare Workers AI 模型，您需要创建一个 Cloudflare 账户，获取 API 密钥，并安装 @langchain/cloudflare 集成包。

凭证

前往 Cloudflare Workers AI 注册 Cloudflare 并生成 API 密钥。完成此操作后，在环境中设置您的凭证：

暂不支持在 Cloudflare Worker 中传递绑定。

安装

LangChain ChatCloudflareWorkersAI 集成位于 @langchain/cloudflare package:

npm install @langchain/cloudflare @langchain/core

yarn add @langchain/cloudflare @langchain/core

pnpm add @langchain/cloudflare @langchain/core

实例化

现在我们可以实例化模型对象并生成聊天补全：

// @lc-docs-hide-cell

// @ts-expect-error Deno is not recognized
const CLOUDFLARE_ACCOUNT_ID = Deno.env.get("CLOUDFLARE_ACCOUNT_ID");
// @ts-expect-error Deno is not recognized
const CLOUDFLARE_API_TOKEN = Deno.env.get("CLOUDFLARE_API_TOKEN");

const llm = new ChatCloudflareWorkersAI({
  model: "@cf/meta/llama-2-7b-chat-int8", // Default value
  cloudflareAccountId: CLOUDFLARE_ACCOUNT_ID,
  cloudflareApiToken: CLOUDFLARE_API_TOKEN,
  // Pass a custom base URL to use Cloudflare AI Gateway
  // baseUrl: `https://gateway.ai.cloudflare.com/v1/{YOUR_ACCOUNT_ID}/{GATEWAY_NAME}/workers-ai/`,
});

调用

const aiMsg = await llm.invoke([
  [
    "system",
    "You are a helpful assistant that translates English to French. Translate the user sentence.",
  ],
  ["human", "I love programming."],
])
aiMsg

AIMessage {
  lc_serializable: true,
  lc_kwargs: {
    content: 'I can help with that! The translation of "I love programming" in French is:\n' +
      "\n" +
      `"J'adore le programmati`... 4 more characters,
    tool_calls: [],
    invalid_tool_calls: [],
    additional_kwargs: {},
    response_metadata: {}
  },
  lc_namespace: [ "langchain_core", "messages" ],
  content: 'I can help with that! The translation of "I love programming" in French is:\n' +
    "\n" +
    `"J'adore le programmati`... 4 more characters,
  name: undefined,
  additional_kwargs: {},
  response_metadata: {},
  tool_calls: [],
  invalid_tool_calls: []
}

console.log(aiMsg.content)

I can help with that! The translation of "I love programming" in French is:

"J'adore le programmation."

API 参考

有关所有 ChatCloudflareWorkersAI 功能和配置的详细文档，请前往 API 参考.