使用 nodeJS 从头开始​​创建 ReAct Agent（维基百科搜索）

mkdir react-agent-projectcd react-agent-projectnpm init -ynpm install axios dotenv @google/generative-ai

google_ai_api_key=your_api_key_here

const axios = require("axios");class tools {  static async wikipedia(q) {    try {      const response = await axios.get("https://en.wikipedia.org/w/api.php", {        params: {          action: "query",          list: "search",          srsearch: q,          srwhat: "text",          format: "json",          srlimit: 4,        },      });      const results = await promise.all(        response.data.query.search.map(async (searchresult) => {          const sectionresponse = await axios.get(            "https://en.wikipedia.org/w/api.php",            {              params: {                action: "parse",                pageid: searchresult.pageid,                prop: "sections",                format: "json",              },            },          );          const sections = object.values(            sectionresponse.data.parse.sections,          ).map((section) => `${section.index}, ${section.line}`);          return {            pagetitle: searchresult.title,            snippet: searchresult.snippet,            pageid: searchresult.pageid,            sections: sections,          };        }),      );      return results        .map(          (result) =>            `snippet: ${result.snippet}\npageid: ${result.pageid}\nsections: ${json.stringify(result.sections)}`,        )        .join("\n\n");    } catch (error) {      console.error("error fetching from wikipedia:", error);      return "error fetching data from wikipedia";    }  }  static async wikipedia_with_pageid(pageid, sectionid) {    if (sectionid) {      const response = await axios.get("https://en.wikipedia.org/w/api.php", {        params: {          action: "parse",          format: "json",          pageid: parseint(pageid),          prop: "wikitext",          section: parseint(sectionid),          disabletoc: 1,        },      });      return object.values(response.data.parse?.wikitext ?? {})[0]?.substring(        0,        25000,      );    } else {      const response = await axios.get("https://en.wikipedia.org/w/api.php", {        params: {          action: "query",          pageids: parseint(pageid),          prop: "extracts",          exintro: true,          explaintext: true,          format: "json",        },      });      return object.values(response.data?.query.pages)[0]?.extract;    }  }}module.exports = tools;

require("dotenv").config();const { googlegenerativeai } = require("@google/generative-ai");const tools = require("./tools");const genai = new googlegenerativeai(process.env.google_ai_api_key);class reactagent {  constructor(query, functions) {    this.query = query;    this.functions = new set(functions);    this.state = "thought";    this._history = [];    this.model = genai.getgenerativemodel({      model: "gemini-1.5-flash",      temperature: 2,    });  }  get history() {    return this._history;  }  pushhistory(value) {    this._history.push(`\n ${value}`);  }  async run() {    this.pushhistory(`**task: ${this.query} **`);    try {      return await this.step();    } catch (e) {      if (e.message.includes("exhausted")) {        return "sorry, i'm exhausted, i can't process your request anymore. >>>>>>>", finalanswer);    return finalanswer;  }}module.exports = reactagent;

const ReActAgent = require("./ReactAgent.js");async function main() {  const query = "What does England border with?";  const functions = [    [      "wikipedia",      "params: query",      "Semantic Search Wikipedia API for snippets, pageIds and sectionIds >> \n ex: Date brazil has been colonized? \n Brazil was colonized at 1500, pageId, sections : []",    ],    [      "wikipedia_with_pageId",      "params : pageId, sectionId",      "Search Wikipedia API for data using a pageId and a sectionIndex as params.  \n ex: 1500, 1234 \n Section information about blablalbal",    ],  ];  const agent = new ReActAgent(query, functions);  try {    const result = await agent.run();    console.log("THE AGENT RETURN THE FOLLOWING >>>", result);  } catch (e) {    console.log("FAILED TO RUN T.T", e);  }}main().catch(console.error);