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package main | |
import ( | |
"fmt" | |
"io" | |
"mime/multipart" | |
"net/http" | |
"os" | |
"gocv.io/x/gocv" | |
"gocv.io/x/gocv/contrib" | |
) | |
func saveFile(file *multipart.FileHeader) error { | |
src, err := file.Open() | |
if err != nil { | |
return err | |
} | |
defer src.Close() | |
dst, err := os.Create("/tmp/" + file.Filename) | |
if err != nil { | |
return err | |
} | |
defer dst.Close() | |
if _, err = io.Copy(dst, src); err != nil { | |
return err | |
} | |
return nil | |
} | |
func detectKeypoints(img gocv.Mat) { | |
gray := gocv.NewMat() | |
gocv.CvtColor(img, &gray, gocv.ColorBGRToGray) | |
sift := contrib.NewSIFT() | |
fmt.Printf("Detected keypoints: %d\n", len(sift.Detect(gray))) | |
gray.Close() | |
sift.Close() | |
} | |
func receiveFile(w http.ResponseWriter, r *http.Request) { | |
_, header, err := r.FormFile("img") | |
if err != nil { | |
panic(err) | |
} | |
if err = saveFile(header); err != nil { | |
panic(err) | |
} | |
fmt.Printf("Received file: %s\n", "/tmp/"+header.Filename) | |
img := gocv.IMRead("/tmp/"+header.Filename, gocv.IMReadColor) | |
defer img.Close() | |
// To make memory consumption faster | |
detectKeypoints(img) | |
detectKeypoints(img) | |
return | |
} | |
func main() { | |
http.HandleFunc("/upload", receiveFile) | |
fmt.Println("Starting server") | |
http.ListenAndServe(":8080", nil) | |
} |
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