package http import ( "crypto/md5" "encoding/hex" "encoding/json" "io" "net/http" "strconv" "time" "github.com/gorilla/mux" "elyby/minecraft-skinsystem/model" ) type texturesResponse struct { Skin *Skin `json:"SKIN"` Cape *Cape `json:"CAPE,omitempty"` } type Skin struct { Url string `json:"url"` Hash string `json:"hash"` Metadata *skinMetadata `json:"metadata,omitempty"` } type skinMetadata struct { Model string `json:"model"` } type Cape struct { Url string `json:"url"` Hash string `json:"hash"` } func (cfg *Config) Textures(response http.ResponseWriter, request *http.Request) { cfg.Logger.IncCounter("textures.request", 1) username := parseUsername(mux.Vars(request)["username"]) skin, err := cfg.SkinsRepo.FindByUsername(username) if err != nil || skin.SkinId == 0 { if skin == nil { skin = &model.Skin{} } skin.Url = "http://skins.minecraft.net/MinecraftSkins/" + username + ".png" skin.Hash = string(buildNonElyTexturesHash(username)) } else { skin.Url = buildElyUrl(skin.Url) } textures := texturesResponse{ Skin: &Skin{ Url: skin.Url, Hash: skin.Hash, }, } if skin.IsSlim { textures.Skin.Metadata = &skinMetadata{ Model: "slim", } } cape, err := cfg.CapesRepo.FindByUsername(username) if err == nil { var scheme string = "http://" if request.TLS != nil { scheme = "https://" } textures.Cape = &Cape{ Url: scheme + request.Host + "/cloaks/" + username, Hash: calculateCapeHash(cape), } } responseData, _ := json.Marshal(textures) response.Header().Set("Content-Type", "application/json") response.Write(responseData) } func calculateCapeHash(cape *model.Cape) string { hasher := md5.New() io.Copy(hasher, cape.File) return hex.EncodeToString(hasher.Sum(nil)) } func buildNonElyTexturesHash(username string) string { hour := getCurrentHour() hasher := md5.New() hasher.Write([]byte("non-ely-" + strconv.FormatInt(hour, 10) + "-" + username)) return hex.EncodeToString(hasher.Sum(nil)) } var timeNow = time.Now func getCurrentHour() int64 { n := timeNow() return time.Date(n.Year(), n.Month(), n.Day(), n.Hour(), 0, 0, 0, time.UTC).Unix() }