试验一下Golang 网络爬虫框架gocolly/colly

Posted 2021-02-07 pu369

参考：http://www.cnblogs.com/majianguo/p/8186429.html

框架源码在 github.com/gocolly/colly

代码如下(源码中的demo)

package main

import (
    "fmt"

    "github.com/gocolly/colly"
)

func main() {
    // Instantiate default collector
    c := colly.NewCollector(
        // Visit only domains: hackerspaces.org, wiki.hackerspaces.org
        colly.AllowedDomains("hackerspaces.org", "wiki.hackerspaces.org"),
    )

    // On every a element which has href attribute call callback
    c.OnHTML("a[href]", func(e *colly.HTMLElement) {
        link := e.Attr("href")
        // Print link
        fmt.Printf("Link found: %q -> %s
", e.Text, link)
        // Visit link found on page
        // Only those links are visited which are in AllowedDomains
        c.Visit(e.Request.AbsoluteURL(link))
    })

    // Before making a request print "Visiting ..."
    c.OnRequest(func(r *colly.Request) {
        fmt.Println("Visiting", r.URL.String())
    })

    // Start scraping on https://hackerspaces.org
    c.Visit("https://hackerspaces.org/")
}

结果Ctrl-B后，提示了类似于cannot find package "github.com/PuerkitoBio/goquery" in any of:等一堆内容，对照提示用gopm逐一下载相应的依赖包,这时候真希望能用go get啊