// GET /showimg?name=${name}&size=${size}&rect=${rect}
func handleShowImg(w http.ResponseWriter, r *http.Request) {
var size image.Point
var rect image.Rectangle
fmt.Printf("handleShowImg: %q\n", r.URL)
vals := r.URL.Query()
name := vals.Get("name")
img := readImageAsRgba(name)
if img == nil {
http.Error(w, fmt.Sprintf("couldn't load image %q", name), http.StatusInternalServerError)
return
}
sizeStr := vals.Get("size")
size, _ = ParseSize(sizeStr)
rectStr := vals.Get("rect")
rect, _ = ParseRectangle(rectStr)
model := struct {
Name string
OrigBounds image.Rectangle
SizeArg string
SizeHuman string
RectArg string
RectHuman string
}{
Name: name,
OrigBounds: img.Bounds(),
SizeArg: sizeStr,
SizeHuman: size.String(),
RectArg: rectStr,
}
if rectStr != "" {
model.RectHuman = rect.String()
}
execTemplate(w, tmplShowImg, model)
}