184 lines
4.1 KiB
Go
184 lines
4.1 KiB
Go
package views
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import (
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"bytes"
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"context"
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"errors"
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"fmt"
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"io"
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"strconv"
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"image"
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"image/jpeg"
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_ "image/png"
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"mime/multipart"
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"net/http"
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"strings"
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"github.com/google/uuid"
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"github.com/gorilla/mux"
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"github.com/minio/minio-go/v7"
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"github.com/minio/minio-go/v7/pkg/credentials"
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"github.com/nfnt/resize"
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)
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func newMinioClient() (*minio.Client, error) {
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endpoint := config.S3Endpoint
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accessKeyID := config.S3AccessKey
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secretKeyID := config.S3SecretKey
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useSSL := true
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//Initialize Minio
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minioCLient, err := minio.New(endpoint, &minio.Options{
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Creds: credentials.NewStaticV4(accessKeyID, secretKeyID, ""),
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Secure: useSSL,
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Region: config.S3Region,
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})
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if err != nil {
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return nil, err
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}
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return minioCLient, nil
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}
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// Upload image through guichet server.
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func uploadProfilePicture(w http.ResponseWriter, r *http.Request, login *LoginStatus) (string, error) {
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file, _, err := r.FormFile("image")
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if err == http.ErrMissingFile {
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return "", nil
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}
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if err != nil {
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return "", err
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}
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defer file.Close()
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err = checkImage(file)
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if err != nil {
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return "", err
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}
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buffFull := bytes.NewBuffer([]byte{})
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buffThumb := bytes.NewBuffer([]byte{})
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err = resizePicture(file, buffFull, buffThumb)
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if err != nil {
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return "", err
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}
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mc, err := newMinioClient()
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if err != nil || mc == nil {
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return "", err
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}
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// If a previous profile picture existed, delete it
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// (don't care about errors)
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if nameConsul := login.UserEntry.GetAttributeValue(FIELD_NAME_PROFILE_PICTURE); nameConsul != "" {
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mc.RemoveObject(context.Background(), config.S3Bucket, nameConsul, minio.RemoveObjectOptions{})
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mc.RemoveObject(context.Background(), config.S3Bucket, nameConsul+"-thumb", minio.RemoveObjectOptions{})
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}
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// Generate new random name for picture
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nameFull := uuid.New().String()
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nameThumb := nameFull + "-thumb"
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_, err = mc.PutObject(context.Background(), config.S3Bucket, nameThumb, buffThumb, int64(buffThumb.Len()), minio.PutObjectOptions{
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ContentType: "image/jpeg",
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})
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if err != nil {
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return "", err
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}
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_, err = mc.PutObject(context.Background(), config.S3Bucket, nameFull, buffFull, int64(buffFull.Len()), minio.PutObjectOptions{
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ContentType: "image/jpeg",
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})
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if err != nil {
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return "", err
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}
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return nameFull, nil
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}
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func checkImage(file multipart.File) error {
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buff := make([]byte, 512) //Detect read only the first 512 bytes
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_, err := file.Read(buff)
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if err != nil {
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return err
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}
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file.Seek(0, 0)
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fileType := http.DetectContentType(buff)
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fileType = strings.Split(fileType, "/")[0]
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if fileType != "image" {
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return errors.New("bad type")
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}
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return nil
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}
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func resizePicture(file multipart.File, buffFull, buffThumb *bytes.Buffer) error {
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file.Seek(0, 0)
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picture, _, err := image.Decode(file)
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if err != nil {
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return err
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}
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thumbnail := resize.Thumbnail(90, 90, picture, resize.Lanczos3)
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picture = resize.Thumbnail(480, 480, picture, resize.Lanczos3)
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err = jpeg.Encode(buffFull, picture, &jpeg.Options{
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Quality: 95,
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})
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if err != nil {
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return err
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}
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err = jpeg.Encode(buffThumb, thumbnail, &jpeg.Options{
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Quality: 100,
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})
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return err
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}
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func HandleDownloadPicture(w http.ResponseWriter, r *http.Request) {
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name := mux.Vars(r)["name"]
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//Check login
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login := checkLogin(w, r)
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if login == nil {
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return
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}
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//Get the object after connect MC
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mc, err := newMinioClient()
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if err != nil {
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http.Error(w, "MinioClient: "+err.Error(), http.StatusInternalServerError)
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return
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}
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obj, err := mc.GetObject(context.Background(), "bottin-pictures", name, minio.GetObjectOptions{})
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if err != nil {
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http.Error(w, "MinioClient: GetObject: "+err.Error(), http.StatusInternalServerError)
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return
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}
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defer obj.Close()
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objStat, err := obj.Stat()
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if err != nil {
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http.Error(w, "MiniObjet: "+err.Error(), http.StatusInternalServerError)
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return
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}
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//Send JSON through xhttp
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w.Header().Set("Content-Type", objStat.ContentType)
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w.Header().Set("Content-Length", strconv.Itoa(int(objStat.Size)))
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//Copy obj in w
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writting, err := io.Copy(w, obj)
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if writting != objStat.Size || err != nil {
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http.Error(w, fmt.Sprintf("WriteBody: %s, bytes wrote %d on %d", err.Error(), writting, objStat.Size), http.StatusInternalServerError)
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return
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}
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}
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