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网络浏览器工具

网络浏览器工具使你的Agent能够访问网站并提取信息。该工具对Agent的描述如下：

适用于你需要在网页上查找内容或对网页进行摘要时使用。输入应为以逗号分隔的列表，包含“包含协议的有效URL”和“你希望在页面上查找的内容，或留空以进行摘要”。

它提供了两种操作模式：

  • 当Agent仅提供URL调用它时，它将生成网站内容的摘要
  • 当Agent提供URL以及需要查找内容的描述时，它将使用内存中的向量存储来查找最相关的片段并对其摘要

安装设置​

要使用网络浏览器工具，你需要安装依赖项：

npm install cheerio axios

使用方式，独立使用​

:::提示 请参阅安装集成包的一般说明部分。 :::

npm install @langchain/openai @langchain/core
import { WebBrowser } from "langchain/tools/webbrowser";
import { ChatOpenAI, OpenAIEmbeddings } from "@langchain/openai";

export async function run() {
  const model = new ChatOpenAI({ model: "gpt-4o-mini", temperature: 0 });
  const embeddings = new OpenAIEmbeddings();

  const browser = new WebBrowser({ model, embeddings });

  const result = await browser.invoke(
    `"https://www.themarginalian.org/2015/04/09/find-your-bliss-joseph-campbell-power-of-myth","who is joseph campbell"`
  );

  console.log(result);
  /*
  Joseph Campbell was a mythologist and writer who discussed spirituality, psychological archetypes, cultural myths, and the mythology of self. He sat down with Bill Moyers for a lengthy conversation at George Lucas’s Skywalker Ranch in California, which continued the following year at the American Museum of Natural History in New York. The resulting 24 hours of raw footage were edited down to six one-hour episodes and broadcast on PBS in 1988, shortly after Campbell’s death, in what became one of the most popular in the history of public television.

  Relevant Links:
  - [The Holstee Manifesto](http://holstee.com/manifesto-bp)
  - [The Silent Music of the Mind: Remembering Oliver Sacks](https://www.themarginalian.org/2015/08/31/remembering-oliver-sacks)
  - [Joseph Campbell series](http://billmoyers.com/spotlight/download-joseph-campbell-and-the-power-of-myth-audio/)
  - [Bill Moyers](https://www.themarginalian.org/tag/bill-moyers/)
  - [books](https://www.themarginalian.org/tag/books/)
  */
}

API Reference:

使用方式，在Agent中使用​

import { OpenAI, OpenAIEmbeddings } from "@langchain/openai";
import { initializeAgentExecutorWithOptions } from "langchain/agents";
import { Calculator } from "@langchain/community/tools/calculator";
import { WebBrowser } from "langchain/tools/webbrowser";
import { SerpAPI } from "@langchain/community/tools/serpapi";

export const run = async () => {
  const model = new OpenAI({ temperature: 0 });
  const embeddings = new OpenAIEmbeddings();
  const tools = [
    new SerpAPI(process.env.SERPAPI_API_KEY, {
      location: "Austin,Texas,United States",
      hl: "en",
      gl: "us",
    }),
    new Calculator(),
    new WebBrowser({ model, embeddings }),
  ];

  const executor = await initializeAgentExecutorWithOptions(tools, model, {
    agentType: "zero-shot-react-description",
    verbose: true,
  });
  console.log("Loaded agent.");

  const input = `What is the word of the day on merriam webster. What is the top result on google for that word`;

  console.log(`Executing with input "${input}"...`);

  const result = await executor.invoke({ input });
  /*
  Entering new agent_executor chain...
  I need to find the word of the day on Merriam Webster and then search for it on Google
  Action: web-browser
  Action Input: "https://www.merriam-webster.com/word-of-the-day", ""


  Summary: Merriam-Webster is a website that provides users with a variety of resources, including a dictionary, thesaurus, word finder, word of the day, games and quizzes, and more. The website also allows users to log in and save words, view recents, and access their account settings. The Word of the Day for April 14, 2023 is "lackadaisical", which means lacking in life, spirit, or zest. The website also provides quizzes and games to help users build their vocabulary.

  Relevant Links: 
  - [Test Your Vocabulary](https://www.merriam-webster.com/games)
  - [Thesaurus](https://www.merriam-webster.com/thesaurus)
  - [Word Finder](https://www.merriam-webster.com/wordfinder)
  - [Word of the Day](https://www.merriam-webster.com/word-of-the-day)
  - [Shop](https://shop.merriam-webster.com/?utm_source=mwsite&utm_medium=nav&utm_content=
  I now need to search for the word of the day on Google
  Action: search
  Action Input: "lackadaisical"
  lackadaisical implies a carefree indifference marked by half-hearted efforts. lackadaisical college seniors pretending to study. listless suggests a lack of ...
  Finished chain.
  */

  console.log(`Got output ${JSON.stringify(result, null, 2)}`);
  /*
  Got output {
    "output": "The word of the day on Merriam Webster is \"lackadaisical\", which implies a carefree indifference marked by half-hearted efforts.",
    "intermediateSteps": [
      {
        "action": {
          "tool": "web-browser",
          "toolInput": "https://www.merriam-webster.com/word-of-the-day\", ",
          "log": " I need to find the word of the day on Merriam Webster and then search for it on Google\nAction: web-browser\nAction Input: \"https://www.merriam-webster.com/word-of-the-day\", \"\""
        },
        "observation": "\n\nSummary: Merriam-Webster is a website that provides users with a variety of resources, including a dictionary, thesaurus, word finder, word of the day, games and quizzes, and more. The website also allows users to log in and save words, view recents, and access their account settings. The Word of the Day for April 14, 2023 is \"lackadaisical\", which means lacking in life, spirit, or zest. The website also provides quizzes and games to help users build their vocabulary.\n\nRelevant Links: \n- [Test Your Vocabulary](https://www.merriam-webster.com/games)\n- [Thesaurus](https://www.merriam-webster.com/thesaurus)\n- [Word Finder](https://www.merriam-webster.com/wordfinder)\n- [Word of the Day](https://www.merriam-webster.com/word-of-the-day)\n- [Shop](https://shop.merriam-webster.com/?utm_source=mwsite&utm_medium=nav&utm_content="
      },
      {
        "action": {
          "tool": "search",
          "toolInput": "lackadaisical",
          "log": " I now need to search for the word of the day on Google\nAction: search\nAction Input: \"lackadaisical\""
        },
        "observation": "lackadaisical implies a carefree indifference marked by half-hearted efforts. lackadaisical college seniors pretending to study. listless suggests a lack of ..."
      }
    ]
  }
  */
};

API Reference:

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