feat: /autorotate

README.md

@@ -740,6 +740,14 @@ Accepts: `image/*, multipart/form-data`. Content-Type: `image/*`
 - minampl `float`
 - field `string` - Only POST and `multipart/form` payloads
 
+#### GET | POST /autorotate
+Accepts: `image/*, multipart/form-data`. Content-Type: `image/*`
+
+##### Allowed params
+
+- file `string` - Only GET method and if the `-mount` flag is present
+- url `string` - Only GET method and if the `-enable-url-source` flag is present
+
 #### GET | POST /flip
 Accepts: `image/*, multipart/form-data`. Content-Type: `image/*`
 

controllers.go

@@ -108,6 +108,7 @@ func formController(w http.ResponseWriter, r *http.Request) {
 		{"Extract", "extract", "top=100&left=100&areawidth=300&areaheight=150"},
 		{"Enlarge", "enlarge", "width=1440&height=900&quality=95"},
 		{"Rotate", "rotate", "rotate=180"},
+		{"Autorotate", "autorotate", ""},
 		{"Flip", "flip", ""},
 		{"Flop", "flop", ""},
 		{"Thumbnail", "thumbnail", "width=100"},

image.go

@@ -123,6 +123,31 @@ func Rotate(buf []byte, o ImageOptions) (Image, error) {
 	return Process(buf, opts)
 }
 
+func AutoRotate(buf []byte, o ImageOptions) (out Image, err error) {
+	opts := BimgOptions(o)
+	defer func() {
+		if r := recover(); r != nil {
+			switch value := r.(type) {
+			case error:
+				err = value
+			case string:
+				err = errors.New(value)
+			default:
+				err = errors.New("libvips internal error")
+			}
+			out = Image{}
+		}
+	}()
+
+	buf, err = bimg.AutoRotate(buf, opts)
+	if err != nil {
+		return Image{}, err
+	}
+
+	mime := GetImageMimeType(bimg.DetermineImageType(buf))
+	return Image{Body: buf, Mime: mime}, nil
+}
+
 func Flip(buf []byte, o ImageOptions) (Image, error) {
 	opts := BimgOptions(o)
 	opts.Flip = true

server.go

@@ -74,6 +74,7 @@ func NewServerMux(o ServerOptions) http.Handler {
 	mux.Handle(join(o, "/extract"), image(Extract))
 	mux.Handle(join(o, "/crop"), image(Crop))
 	mux.Handle(join(o, "/rotate"), image(Rotate))
+	mux.Handle(join(o, "/autorotate"), image(AutoRotate))
 	mux.Handle(join(o, "/flip"), image(Flip))
 	mux.Handle(join(o, "/flop"), image(Flop))
 	mux.Handle(join(o, "/thumbnail"), image(Thumbnail))