GO用内置包写爬虫

package main

import (
	"bytes"
	"encoding/json"
	"io"
	"io/ioutil"
	"net/http"
	"time"
)

func Get(url string) string {
	client := &http.Client{Timeout: 5 * time.Second} // 超时时间：5秒 相当于我们爬虫中的timeout参数
	resp, err := client.Get(url)   //发起请求  
    //resp, err := http.NewRequest("GET", url) 也可以这样写 post同理

    //增加header选项
    resp.Header.Add("Cookie", "xxxxxx")
    resp.Header.Add("User-Agent", "xxx")
    resp.Header.Add("X-Requested-With", "xxxx")
    //cookies就直接加在请求头中就好了
    
	if err != nil {         //请求返回的错误参数
		panic(err)
	}
	defer resp.Body.Close()  //请求成功对于请求提进行解析
	var buffer [512]byte
	result := bytes.NewBuffer(nil)
	for {
		n, err := resp.Body.Read(buffer[0:])
		result.Write(buffer[0:n])
		if err != nil && err == io.EOF {
			break
		} else if err != nil {
			panic(err)
		}
	}
	return result.String()
}


func main(){
	print(Get("http://www.baidu.com"))
}

//其他地方就省略咯
func Post(url string, data interface{}, contentType string) string {
	client := &http.Client{Timeout: 5 * time.Second}
	jsonStr, _ := json.Marshal(data)
	resp, err := client.Post(url, contentType, bytes.NewBuffer(jsonStr))
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()

	result, _ := ioutil.ReadAll(resp.Body)
	return string(result)
}