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| package main
import (
"fmt"
"net/http"
"os"
"regexp"
"strconv"
"strings"
)
func httpGet(url string) (result string, err error) {
// https://www.gushiwen.org/default_2.aspx
resp, err := http.Get(url)
if err != nil {
fmt.Println("http.Get() err:", err)
return
}
defer resp.Body.Close()
buf := make([]byte, 1024*4)
for {
n, err := resp.Body.Read(buf)
if n == 0 || err != nil {
break
}
result += string(buf[:n])
}
return
}
// 爬取详细内容
func spiderContent(url string) (title, content string) {
result, err := httpGet(url)
if err != nil {
fmt.Println("httpGet() err:", err)
return
}
// 创建正则表达式对象 匹配标题
re := regexp.MustCompile(`<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">(?s:(.*?))</h1>`)
if re == nil {
fmt.Println("re is nil")
return
}
// 使用创建的正则表达式对象对返回的result进行匹配FindAllStringSubmatch(需要匹配的字符串,匹配多少次,-1为匹配所有)
reTitle := re.FindAllStringSubmatch(result, 1)
for _, v := range reTitle {
title = strings.Replace(v[1], "\t", "", -1)
title = strings.Replace(title, "\n", "", -1)
title = strings.Replace(title, "\r", "", -1)
title = strings.Replace(title, " ", "", -1)
}
// 匹配内容
contsonID := url[32:44]
re = regexp.MustCompile(`<div class="contson" id="contson` + contsonID + `">(?s:(.*?))</div>`)
if re == nil {
fmt.Println("re is nil")
return
}
reContent := re.FindAllStringSubmatch(result, 1)
for _, v := range reContent {
content = strings.Replace(v[1], "\t", "", -1)
content = strings.Replace(content, "\n", "", -1)
content = strings.Replace(content, "\r", "", -1)
content = strings.Replace(content, " ", "", -1)
content = strings.Replace(content, "<br/>", "", -1)
content = strings.Replace(content, "<p>", "", -1)
content = strings.Replace(content, "</p>", "", -1)
}
return
}
func save(index int, titleArr, contentArr []string) {
f, err := os.Create(strconv.Itoa(index) + ".txt")
if err != nil {
fmt.Println("create file errr:", err)
return
}
defer f.Close()
n := len(titleArr)
for i := 0; i < n; i++ {
f.WriteString(titleArr[i] + "\n")
f.WriteString(contentArr[i] + "\n")
f.WriteString("\n")
}
return
}
// 爬取每一页的连接
func spiderPage(index int, isExit chan int) {
url := "https://www.gushiwen.org/default_" + strconv.Itoa(index) + ".aspx"
result, err := httpGet(url)
if err != nil {
fmt.Println("httpGet() err:", err)
return
}
// 创建正则表达式对象
re := regexp.MustCompile(`<p><a style="font-size:18px; line-height:22px; height:22px;" href="(?s:(.*?))"`)
if re == nil {
fmt.Println("re is nil")
return
}
reUrls := re.FindAllStringSubmatch(result, -1)
titleArr := make([]string, 0)
contentArr := make([]string, 0)
for _, v := range reUrls {
title, content := spiderContent(v[1])
titleArr = append(titleArr, title)
contentArr = append(contentArr, content)
}
// 保存到文件
save(index, titleArr, contentArr)
isExit <- index
}
func doWork(start, end int) {
fmt.Printf("正在抓取 %d 到 %d 页面数据\n", start, end)
isExit := make(chan int)
for i := start; i <= end; i++ {
go spiderPage(i, isExit)
}
for i := start; i <= end; i++ {
<-isExit
fmt.Printf("已经保存了:%d个\n", i)
}
}
func main() {
var start, end int
fmt.Println("请输入起始页:")
fmt.Scan(&start)
fmt.Println("请输入结束页:")
fmt.Scan(&end)
doWork(start, end)
}
|