func (this *service) ServeHTTP(w http.ResponseWriter, r *http.Request) {
urlPath := r.URL.Path
hash := urlPath[strings.LastIndex(urlPath, "/")+1:]
size := this.mustInt(r, 290, "s", "size") // default size = 290*290
avatar := New(hash, this.cacheDir)
avatar.AlterImage = this.altImage
if avatar.Expired() {
if err := avatar.UpdateTimeout(time.Millisecond * 1000); err != nil {
log.Trace("avatar update error: %v", err)
return
}
}
if modtime, err := avatar.Modtime(); err == nil {
etag := fmt.Sprintf("size(%d)", size)
if t, err := time.Parse(http.TimeFormat, r.Header.Get("If-Modified-Since")); err == nil && modtime.Before(t.Add(1*time.Second)) && etag == r.Header.Get("If-None-Match") {
h := w.Header()
delete(h, "Content-Type")
delete(h, "Content-Length")
w.WriteHeader(http.StatusNotModified)
return
}
w.Header().Set("Last-Modified", modtime.UTC().Format(http.TimeFormat))
w.Header().Set("ETag", etag)
}
w.Header().Set("Content-Type", "image/jpeg")
if err := avatar.Encode(w, size); err != nil {
log.Warn("avatar encode error: %v", err)
w.WriteHeader(500)
}
}
func NewContext() {
var (
e error
)
Cfg, e = ini.Load("conf/app.ini")
if e != nil {
log.Fatal(4, "Fail to load conf %v", e)
}
if com.IsFile(CustomConf) {
if e = Cfg.Append(CustomConf); e != nil {
log.Fatal(4, "Fail to load custom conf '%s': %v", CustomConf, e)
}
} else {
log.Warn("Custom config (%s) not found, ignore this if you're running first time", CustomConf)
}
Cfg.NameMapper = ini.AllCapsUnderscore
}