使用标准库http来实现

package tools

import (
    "io/ioutil"
    "net/http"
)

func Get(url string)string{
    res, err :=http.Get(url)
    if err != nil {
        return ""
    }
    robots, err := ioutil.ReadAll(res.Body)
    res.Body.Close()
    if err != nil {
        return ""
    }
    return string(robots)
}