go语言读取json并下载高清妹子图片

 package main import ( "fmt" "io" "io/ioutil" "net/http" "os" "path/filepath" "strconv" //"encoding/json" "strings" "github.com/bitly/go-simplejson" ) const ( DataRoot   = "./tmp/" // 存放封面图的根目录 TimeoutLimit = 10    // 设置超时时间 PageUrl   = "http://api.lovebizhi.com/macos_v4.php?a=category&spdy=1&tid=3&order=hot&color_id=3&device=105&uuid=436e4ddc389027ba3aef863a27f6e6f9&mode=0&retina=0&client_id=1008&device_id=31547324&model_id=105&size_id=0&channel_id=70001&screen_width=1920&screen_height=1200&bizhi_width=1920&bizhi_height=1200&version_code=19&language=zh-Hans&jailbreak=0&mac=&p={pid}" ) // 壁纸类型，有编号，长宽和URL type Wallpaper struct { Pid   int Url   string Width  int Height  int } // 将图片下载并保存到本地 func SaveImage(paper *Wallpaper) { res, err := http.Get(paper.Url) defer res.Body.Close() if err != nil { fmt.Printf("%d HTTP ERROR:%s", paper.Pid, err) return } //按分辨率目录保存图片 Dirname := DataRoot + strconv.Itoa(paper.Width) + "x" + strconv.Itoa(paper.Height) + "/" if ! isDirExist(Dirname) { os.Mkdir(Dirname, 0755); fmt.Printf("dir %s created\n", Dirname) } //根据URL文件名创建文件 filename := filepath.Base(paper.Url) dst, err := os.Create(Dirname + filename) if err != nil { fmt.Println("%d HTTP ERROR:%s", paper.Pid, err) return } // 写入文件 io.Copy(dst, res.Body) } func isDirExist(path string) bool { p, err := os.Stat(path) if err != nil { return os.IsExist(err) } else { return p.IsDir() } } func main() { //检查并创建临时目录 if ! isDirExist(DataRoot) { os.Mkdir(DataRoot, 0755); fmt.Println("dir %s created", DataRoot) } //生成一个数据序列，用来获取分页 pow := make([]int, 2) for i := range pow { if (i > 0) { url := strings.Replace(PageUrl, "{pid}", strconv.Itoa(i), -1); fmt.Println(i, url); response, err := http.Get(url) if( err != nil) { fmt.Println(err) continue } body, _ := ioutil.ReadAll(response.Body) js, err := simplejson.NewJson(body) //遍历data下的所有数据 data := js.Get("data").MustArray() for _, v := range data { v := v.(map[string]interface{}) for kk, vv := range v { if(kk == "file_id") { //这里 vv 是一个[]interface{} json.Number，不知道怎么取出值，这里用了比较傻的Sprintf vv := fmt.Sprintf("%s", vv) imgid,_ := strconv.Atoi(vv) url := fmt.Sprintf("http://s.qdcdn.com/c/%d,1920,1200.jpg-600", imgid) fmt.Println(kk, imgid, url); paper := &Wallpaper{imgid, url, 1920, 1200} SaveImage(paper); } } } } } fmt.Println("oh yes, all job done.") }