chrly/http/textures.go

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package http
import (
"crypto/md5"
"encoding/hex"
"encoding/json"
"io"
"net/http"
"strconv"
"time"
"github.com/gorilla/mux"
"github.com/elyby/chrly/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))
}
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()
}