func loadSize(ctxt *fs.Context, name string, max int) *image.RGBA {
data, _, err := ctxt.Read("qr/upload/" + name + ".png")
if err != nil {
panic(err)
}
i, _, err := image.Decode(bytes.NewBuffer(data))
if err != nil {
panic(err)
}
b := i.Bounds()
dx, dy := max, max
if b.Dx() > b.Dy() {
dy = b.Dy() * dx / b.Dx()
} else {
dx = b.Dx() * dy / b.Dy()
}
var irgba *image.RGBA
switch i := i.(type) {
case *image.RGBA:
irgba = resize.ResizeRGBA(i, i.Bounds(), dx, dy)
case *image.NRGBA:
irgba = resize.ResizeNRGBA(i, i.Bounds(), dx, dy)
}
return irgba
}
func flag(w http.ResponseWriter, req *http.Request, img string, ctxt *fs.Context) {
if !isImgName(img) && !isTagName(img) {
fmt.Fprintf(w, "Invalid image.\n")
return
}
data, _, _ := ctxt.Read("qr/flag/" + img)
data = append(data, '!')
ctxt.Write("qr/flag/"+img, data)
fmt.Fprintf(w, "Thank you. The image has been reported.\n")
}
func runTemplate(c *fs.Context, w http.ResponseWriter, name string, data interface{}) {
t := template.New("main")
main, _, err := c.Read(name)
if err != nil {
panic(err)
}
style, _, _ := c.Read("style.html")
main = append(main, style...)
_, err = t.Parse(string(main))
if err != nil {
panic(err)
}
var buf bytes.Buffer
if err := t.Execute(&buf, &data); err != nil {
panic(err)
}
w.Write(buf.Bytes())
}