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014_regx.go
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/
014_regx.go
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package main
import (
"fmt"
"io/ioutil"
"net/http"
"regexp"
"strings"
)
func IsIP(ip string) (b bool) {
if m, _ := regexp.MatchString("^[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}$", ip); !m {
return false
}
return true
}
func main() {
ip := "127.0.0.1"
fmt.Printf("%s is IP : %v", ip, IsIP(ip))
resp, err := http.Get("http://www.baidu.com")
if err != nil {
fmt.Println("http get error.")
return
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
fmt.Println("http read error.")
return
}
src := string(body)
re, _ := regexp.Compile("\\<[\\S\\s]+?\\>")
src = re.ReplaceAllStringFunc(src, strings.ToLower)
//去除STYLE
re, _ = regexp.Compile("\\<style[\\S\\s]+?\\</style\\>")
src = re.ReplaceAllString(src, "")
//去除SCRIPT
re, _ = regexp.Compile("\\<script[\\S\\s]+?\\</script\\>")
src = re.ReplaceAllString(src, "")
//去除所有尖括号内的HTML代码,并换成换行符
re, _ = regexp.Compile("\\<[\\S\\s]+?\\>")
src = re.ReplaceAllString(src, "\n")
//去除连续的换行符
re, _ = regexp.Compile("\\s{2,}")
src = re.ReplaceAllString(src, "\n")
fmt.Println(src)
}