Web Search Skill / 网络搜索技能

Perform web searches using various search engines and APIs. This skill provides access to search functionality without requiring API keys for basic usage.

使用各种搜索引擎和API进行网络搜索。此技能提供搜索功能访问，无需API密钥即可进行基本操作。

Features / 功能特性

• URL Content Extraction: Read and extract content from any web page URL

URL内容提取: 从任意网页URL读取和提取内容

• Keyword Search: Search for specific keywords and return specified number of results

关键词搜索: 搜索特定关键词并返回指定数量的结果

• Dependency Management: Automatic dependency installation via npm

依赖管理: 通过npm自动安装依赖项

Basic Usage / 基础用法

Read content from a specific URL:

从特定URL读取内容：

node ./search.js <url> [previewLength]

Parameters / 参数:

• url: The URL to read (required)

要读取的URL（必需）

• previewLength: Number of characters to preview (optional, default: 200, use 0 to disable preview)

预览字符数（可选，默认：200，使用0禁用预览）

Examples / 示例:

# Default preview (200 characters)
# 默认预览（200字符）
node ./search.js https://www.example.com

# Preview 500 characters
# 预览500字符
node ./search.js https://www.example.com 500

# No preview (show only metadata)
# 无预览（仅显示元数据）
node ./search.js https://www.example.com 0

Output Format / 输出格式:

• Title / 标题
• URL
• Platform / 平台
• Content length / 内容长度
• Content preview / 内容预览（可选）

Advanced Usage / 高级用法

Search with specific keyword and result limit:

使用特定关键词和结果限制进行搜索：

node ./exasearch.js <keyword> [numResults]

Parameters / 参数:

• keyword: Search query string (required)

搜索查询字符串（必需）

• numResults: Number of results to return (optional, default: 10, max: 100)

返回结果数量（可选，默认：10，最大：100）

Examples / 示例:

# Basic search with default 10 results
# 默认10个结果的基础搜索
node ./exasearch.js "artificial intelligence"

# Search with 20 results
# 搜索20个结果
node ./exasearch.js "machine learning" 20

# Search with 50 results
# 搜索50个结果
node ./exasearch.js "deep learning" 50

Setup / 安装设置

First-time setup requires installing dependencies:

首次使用需要安装依赖：

Prerequisites / 前置要求:

• Node.js v22 or higher / Node.js v22 或更高版本
• npm or yarn

npm install

Dependencies / 依赖项:

• axios: HTTP client for web requests

HTTP客户端，用于网络请求

• mcporter: Tool integration framework

工具集成框架

Error Handling / 错误处理

The scripts include comprehensive error handling for:

脚本包含全面的错误处理：

• Missing required parameters / 缺少必需参数
• Invalid parameter values / 无效参数值
• Network connection errors / 网络连接错误
• HTTP request failures / HTTP请求失败
• Server timeout errors / 服务器超时错误

Technical Details / 技术细节

• Backend / 后端: Jina Reader API (https://r.jina.ai)
• Timeout / 超时: 15 seconds for web requests / 网络请求15秒
• Output Format / 输出格式: JSON / Markdown
• Search Provider / 搜索提供商: Exa API (via mcporter)

Logic Examples / 逻辑示例

ReadResult.js - Result Object Class

export class ReadResult {
  constructor(title, content, url, platform = "web") {
    this.title = title;
    this.content = content;
    this.url = url;
    this.platform = platform;
  }

  toDict() {
    return {
      title: this.title,
      content: this.content,
      url: this.url,
      platform: this.platform
    };
  }
}

search.js - URL Content Extraction

import axios from 'axios';
import { ReadResult } from './ReadResult.js';

class WebChannel {
  constructor() {
    this.JINA_URL = "https://r.jina.ai/";
  }

  async read(url) {
    try {
      const response = await axios.get(`${this.JINA_URL}${url}`, {
        headers: {
          'Accept': 'text/markdown'
        },
        timeout: 15000
      });

      const text = response.data;
      let title = url;
      const lines = text.split('\n');
      
      for (const line of lines) {
        const trimmedLine = line.trim();
        if (trimmedLine.startsWith('# ')) {
          title = trimmedLine.substring(2).trim();
          break;
        }
        if (trimmedLine.startsWith('Title:')) {
          title = trimmedLine.substring(6).trim();
          break;
        }
      }

      return new ReadResult(title, text, url, "web");

    } catch (error) {
      if (error.response) {
        throw new Error(`HTTP ${error.response.status}: ${error.response.statusText}`);
      } else if (error.request) {
        throw new Error('Network error: No response received');
      } else {
        throw new Error(`Request failed: ${error.message}`);
      }
    }
  }
}

async function main() {
  const url = process.argv[2];
  const previewLength = process.argv[3] ? parseInt(process.argv[3], 10) : 200;
  
  if (!url) {
    console.error('Usage: node search.js <url> [previewLength]');
    console.error('  url: The URL to read');
    console.error('  previewLength: Number of characters to preview (optional, default: 200)');
    process.exit(1);
  }

  if (isNaN(previewLength) || previewLength < 0) {
    console.error('Error: previewLength must be a non-negative integer');
    process.exit(1);
  }

  const webChannel = new WebChannel();
  
  try {
    console.log(`Reading: ${url}`);
    const result = await webChannel.read(url);
    
    console.log('\n=== Read Result ===');
    console.log(`Title: ${result.title}`);
    console.log(`URL: ${result.url}`);
    console.log(`Platform: ${result.platform}`);
    console.log(`Content length: ${result.content.length} characters`);
    
    if (previewLength > 0) {
      console.log(`\nFirst ${previewLength} characters of content:`);
      const preview = result.content.substring(0, previewLength);
      console.log(preview + (result.content.length > previewLength ? '...' : ''));
    }
    
  } catch (error) {
    console.error('Error reading web page:', error.message);
    process.exit(1);
  }
}

main();

exasearch.js - Keyword Search

import { callOnce } from "mcporter";

async function main() {
  const keyword = process.argv[2];
  const num = process.argv[3];

  if (!keyword) {
    console.error('Error: Search keyword is required');
    console.error('Usage: node exasearch.js <keyword> [numResults]');
    process.exit(1);
  }

  const numResults = num ? parseInt(num, 10) : 10;

  if (isNaN(numResults) || numResults < 1) {
    console.error('Error: numResults must be a positive integer');
    process.exit(1);
  }

  if (numResults > 100) {
    console.error('Error: numResults cannot exceed 100');
    process.exit(1);
  }

  try {
    console.log(`Searching for: ${keyword}`);
    console.log(`Number of results: ${numResults}`);
    
    const result = await callOnce({
      server: "exa",
      toolName: "web_search_exa",
      args: { query: keyword, numResults: numResults },
    });

    console.log('\n=== Search Results ===');
    console.log(JSON.stringify(result, null, 2));
    
  } catch (error) {
    console.error('Error during search:', error.message);
    
    if (error.response) {
      console.error(`HTTP ${error.response.status}: ${error.response.statusText}`);
    } else if (error.request) {
      console.error('Network error: No response received from server');
    } else if (error.code === 'ECONNREFUSED') {
      console.error('Connection refused: Unable to reach the search server');
    } else if (error.code === 'ETIMEDOUT') {
      console.error('Request timeout: Server took too long to respond');
    }
    
    process.exit(1);
  }
}

main();