Go language read json and download HD sister pictures _golang

Learn a day Golang, while looking at the document side write go read analysis json and download pictures
JSON API for Love wallpaper HD mac 1920x1200 version, HD sister figure

Summary: Go+json=shit

Package main import ("FMT" "io" "io/ioutil" "Net/http" "OS" "Path/filepath" "StrConv"//"Encoding/json" "Strings" "Github.com/bitly/go-simplejson") const (DataRoot = "./tmp/"//Storage cover page Map root timeoutlimit = 10//Set Timeout time 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} ")//wallpaper type, numbered, long width and URL type wallpaper struct {pid int URL string Width int Height int}// Download and save the picture to the local 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} Save picture by resolution directory 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)}//create file based on URL filename filename: = filepath. Base (paper. URL) DST, err: = OS. Create (dirname + filename) If Err!= nil {fmt. Println ("%d HTTP error:%s", paper.) Pid, err) return}//write file 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 () {//check and create a temporary directory if! isdirexist (DataRoot) {OS.
    Mkdir (DataRoot, 0755); Fmt. Println ("dir%s created", DataRoot)}//Generate a data sequence to get pagination 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)//traversal of data under All information: = JS. Get ("Data").
          Mustarray () for _, V: = Range Data {V: = V. (map[string]interface{}) for KK, VV: = Range v { if (KK = = "file_id") {//here VV is a []interface{} json. Number, do not know how to take out the value, here with a more silly sprintf vv: = FMT. Sprintf ("%s", vv) imgid,_: = StrConv. Atoi (vv) URL: = fmt. Sprintf ("Yun_qi_img/%d,1920,1200.jpg", Imgid) fmt.
            Println (KK, imgid, URL);
          Paper: = &wallpaper{imgid, URL, 1920, 1200} saveimage (paper); }}}} fmt.
 Println ("Oh yes, all job done.")}

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