Nutch网页抓取速度优化 Here are the things that could potentially slow down fetching 1) DNS setup 2) The number of crawlers you have, too many, too few. 3) Bandwidth limitations 4) Number of threads per host (politeness) 5) Uneven distribution of urls to fetc
最近在弄网页爬虫这方面的,上网看到关于htmlagilitypack搭配scrapysharp的文章,于是决定试一试~ 于是到https://www.nuget.org/packages/ScrapySharp去看看, 看到这句下载提示:To install ScrapySharp, run the following command in the Package Manager Console PM> Install-Package ScrapySharp 接下去我就去找package man
概要: 这篇博文主要讲一下如何使用Phantomjs进行数据抓取,这里面抓的网站是太平洋电脑网估价的内容.主要是对电脑笔记本以及他们的属性进行抓取,然后在使用nodejs进行下载图片和插入数据库操作. 先进行所有页面的内容进行抓取 var page =require('webpage').create(); var address='http://product.pconline.com.cn/server/'; var fs = require('fs'); var mypath = 'ver