網頁抓取是使用機器人從網站提取資料的過程，它涉及透過以程式設計方式檢查所需的特定資訊來從網頁獲取內容，其中可能包括文字、圖片、價格、網址和標題。
注意
網路抓取必須負責任地進行，尊重服務條款和法律準則，因為某些網站限制資料提取。
網頁抓取的應用程式
電子商務 - 監控競爭對手的價格趨勢和產品可用性
市場研究 - 透過收集顧客評論和行為模式進行研究
潛在客戶生成 - 這涉及從某些目錄中提取資料以建立目標外展清單
新聞和金融數據 – 收集最新新聞、金融市場趨勢，以形成金融見解。
學術研究 – 收集資料進行分析研究
網頁抓取工具
網路抓取工具可以幫助您更輕鬆地從網站收集信息，並且通常可以自動執行資料擷取過程。
| TOOL | DESCRIPTION | APPLICATION | BEST USED FOR |
|---|---|---|---|
| BeautifulSoup | Python library for parsing HTML and XML | Extracting content from static web pages, such as HTML tags and structured data tables | Projects that don’t need browsers interaction |
| Selenium | Browser automation tool that interacts with dynamic websites, filling forms, clicking buttons and handling javas cript content. | Extracting content from sites that require user interaction Scraping content generated by java script | Complex dynamic pages that offer infinite scroll |
| Scrapy | An open-source, python-based framework designed specifically for web scraping | Large-scale scraping projects and data pipelines | Crawling multiple pages, creating datasets from large websites and scraping structured data |
| Octoparse | A no-code tool with a drag-and-drop interface for building scraping workflows | Data collection for users without programming skills, especially for web pages that has job listings or social media profiles. | Quick data collection with no-code workflows |
| ParseHub | A visual extraction tool for scraping from dynamic websites using AI to understand and collect data from complex layouts | Scrapping data from AJAX-based websites, dashboards and interactive charts | Non-technical users who want to scrap data from complex, javascript-heavy websites. |
| Puppeteer | A Node.js library that provides high-level API to control chrome over the DevTools Protocol | Capturing and scraping dynamic java Script content, taking screenshots, generating PDFs and automated browser testing | Java script-heavy websites, especially when server-side data extraction is needed |
| Apify | A cloud-based scraping platform with an extensive library of ready made scraping tools, plus support for custom scripts. | Collecting large datasets or scrapping from multiple sources | Enterprise-level web scraping tasks that require scaling and automation |
如果需要，您可以在一個專案中組合多個工具
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