Golang implementation of WeChat public platform API engine development model

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/* * @author spinach June * @Version 0.2 * @time 2013-10-29 * @golang implement the public Platform API engine development mode *@ Qingdao Programmer subscription Number Qdprogrammer * @Golang subscription number Gostock *@ about Qingdao Programmer's technology, entrepreneurship, life sharing. *@ Open Source https://github.com/philsong/*/package mainimport ("Crypto/sha1" "Encoding/xml" "FMT" "io" "io/ioutil" "Log" "net/ http "Sort" "strings" "Time") const (TOKEN = "Gostock" text = "text" location = "Location" image = "image" Link = " Link "event =" event "music =" Music "news =" News ") type msgbase struct {tousername stringfromusername Stringcrea Tetime time. Durationmsgtype stringcontent string}type Request struct {xmlname XML. Name ' xml: ' xml ' ' msgbase//Base structlocation_x, location_y Float32scale Intlabe L stringpicurl stringmsgid int}type Response struct {xmlname XML. Name ' xml: ' xml ' ' msgbasearticlecount int ' xml: ', Omitempty ' articles []*item ' xml: ' Articles>item,omitempty ' ' FUNCF Lag Int}type item struct {Xmlname XML. Name ' xml: ' item ' ' Title stringdescription stringpicurl stringurl string}func weixinevent (w http. Responsewriter, R *http. Request) {if Weixinchecksignature (W, r) = = False {fmt. Println ("Auth failed, attached?") Return}fmt. Println ("auth success, parse POST") defer r.body.close () Body, err: = Ioutil. ReadAll (r.body) if err! = Nil {log. Fatal (Err) return}fmt. Println (String (body)) var wreq *requestif wreq, err = decoderequest (body); Err! = Nil {log. Fatal (Err) return}wresp, err: = Dealwith (wreq) if err! = Nil {log. Fatal (Err) return}data, err: = Wresp. Encode () if err! = Nil {fmt. Printf ("error:%v\n", err) return}fmt. Println (String (data)) FMT. fprintf (W, string (data)) Return}func Dealwith (req *request) (resp *response, err error) {resp = Newresponse () resp. Tousername = req. Fromusernameresp.fromusername = req. Tousernameresp.msgtype = Textif req. Msgtype = = Event {if req. Content = = "Subscribe" {resp. Content = "Welcome to the subscription number Qdprogrammer, share the technology of Qingdao programmers, entrepreneurship, life." "Return resp, nil}}if req. Msgtype = = Text {if strings. Trim (Strings. ToLower (req. Content), "") = = "Help" {resp. Content = "Welcome to the subscription number Qdprogrammer, share the technology of Qingdao programmers, entrepreneurship, life." "Return resp, Nil}resp. Content = "Pro, spinach June has received your message and will reply to you as soon as possible."} else if req. Msgtype = = Image {var a itema. Description = "Ya Minute fly butterfly ... ^_^ ^_^ 1024 you know "a.title =" Ya Minute fly butterfly test "A.picurl =" http://static.yaliam.com/gwz.jpg "A.url =" Http://blog.csdn.net/songbohr "Resp. Msgtype = Newsresp.articlecount = 1resp. Articles = Append (resp. Articles, &a) resp. Funcflag = 1} else {resp. Content = "No other type is currently supported"}return RESP, Nil}func Weixinauth (w http. Responsewriter, R *http. Request) {if Weixinchecksignature (W, r) = = true {var echostr string = strings. Join (r.form["Echostr"], "") fmt. fprintf (W, echostr)}}func Weixinhandler (w http. Responsewriter, R *http. Request) {if R.method = = "GET" {fmt. PRINTLN ("GET begin ...") Weixinauth (W, R) fmt. Println ("GET END ...")} else {fmt. PRINTLN ("POST begin ...") Weixinevent (W, R) fmt. Println ("POST END ...")}}func Main () {http. Handlefunc ("/check", Weixinhandler)//http. Handlefunc ("/", actION) Port: = "println" ("Listening on port", "Port", "...") Err: = http. Listenandserve (":" +port, Nil)//Set the listening port if err! = Nil {log. Fatal ("Listenandserve:", err)}}func str2sha1 (data String) string {t: = SHA1. New () Io. WriteString (t, data) return to FMT. Sprintf ("%x", T.sum (nil))}func weixinchecksignature (w http. Responsewriter, R *http. Request) bool {r.parseform () fmt. Println (R.form) var signature string = strings. Join (r.form["signature"], "") var timestamp string = strings. Join (r.form["timestamp"], "") var nonce string = strings. Join (r.form["nonce"], "") tmps: = []string{token, timestamp, Nonce}sort. Strings (tmps) Tmpstr: = Tmps[0] + tmps[1] + tmps[2]tmp: = STR2SHA1 (TMPSTR) if tmp = = Signature {return True}return False}fun c decoderequest (data []byte) (req *request, err error) {req = &request{}if err = XML. Unmarshal (data, req); Err! = Nil {return}req. Createtime *= time. Secondreturn}func Newresponse () (resp *response) {resp = &response{}resp. Createtime = time. Duration (time. Now (). Unix ()) Return}func (Resp Response) Encode () (data []byte, err Error) {resp. Createtime = time. Duration (time. Now (). Unix ()) data, err = XML. Marshal (RESP) return}