Seven bull time stamp anti-theft chain go language implementation

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 PackageMainImport("CRYPTO/MD5"    "Flag"    "FMT"    "Net/url"    "Strings")funcMain () {varTInt64    varKeystring    varResurlstringFlag. Int64var (&t,"T",0,"expire timestamp") flag. Stringvar (&key,"Key","","Encrypt key") flag. Stringvar (&resurl,"url","","Resource url") flag. Parse ()ift = =0|| Key = =""|| Resurl = =""{return} expiretime: = Fmt. Sprintf ("%x", t) Resuri, Perr: = URL. Parse (Resurl)ifPerr! =Nil{return} Path: = Resuri.path rawstr: = FMT. Sprintf ("%s%s%s", key, Path, expiretime) md5h: = MD5. New () Md5h.write ([]byte(RAWSTR)) Sign: = FMT. Sprintf ("%x", Md5h.sum (Nil))varNewurlstring    ifStrings. Contains (Resurl,"?") {Newurl = Fmt. Sprintf ("%s&sign=%s&t=%s", Resurl, sign, Expiretime)}Else{Newurl = Fmt. Sprintf ("%s?sign=%s&t=%s", Resurl, sign, expiretime)} fmt. Println (Newurl)}