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package main
import (
"bytes"
"context"
"errors"
"fmt"
"io"
"strconv"
"image"
"image/jpeg"
_ "image/png"
"mime/multipart"
"net/http"
"strings"
"github.com/go-ldap/ldap/v3"
"github.com/google/uuid"
"github.com/gorilla/mux"
"github.com/minio/minio-go/v7"
"github.com/minio/minio-go/v7/pkg/credentials"
"github.com/nfnt/resize"
)
const PROFILE_PICTURE_FIELD_NAME = "profilePicture"
//Upload image through guichet server.
func uploadImage(w http.ResponseWriter, r *http.Request, login *LoginStatus) (string, error) {
file, _, err := r.FormFile("image")
if err == http.ErrMissingFile {
return "", nil
}
if err != nil {
return "", err
}
defer file.Close()
err = checkImage(file)
if err != nil {
return "", err
}
buff := bytes.NewBuffer([]byte{})
buff_thumbnail := bytes.NewBuffer([]byte{})
err = resizeThumb(file, buff, buff_thumbnail)
if err != nil {
return "", err
}
mc, err := newMinioClient()
if err != nil || mc == nil {
return "", err
}
var name, nameFull string
if nameConsul := login.UserEntry.GetAttributeValue(PROFILE_PICTURE_FIELD_NAME); nameConsul != "" {
name = nameConsul
nameFull = "full_" + name
} else {
name = uuid.New().String() + ".jpeg"
nameFull = "full_" + name
}
_, err = mc.PutObject(context.Background(), config.S3_Bucket, name, buff_thumbnail, int64(buff_thumbnail.Len()), minio.PutObjectOptions{
ContentType: "image/jpeg",
})
if err != nil {
return "", err
}
_, err = mc.PutObject(context.Background(), config.S3_Bucket, nameFull, buff, int64(buff.Len()), minio.PutObjectOptions{
ContentType: "image/jpeg",
})
if err != nil {
return "", err
}
return name, nil
}
func newMinioClient() (*minio.Client, error) {
endpoint := config.S3_Endpoint
accessKeyID := config.S3_AccesKey
secretKeyID := config.S3_SecretKey
useSSL := true
//Initialize Minio
minioCLient, err := minio.New(endpoint, &minio.Options{
Creds: credentials.NewStaticV4(accessKeyID, secretKeyID, ""),
Secure: useSSL,
Region: config.S3_Region,
})
if err != nil {
return nil, err
}
return minioCLient, nil
}
func checkImage(file multipart.File) error {
buff := make([]byte, 512) //Detect read only the first 512 bytes
_, err := file.Read(buff)
if err != nil {
return err
}
file.Seek(0, 0)
fileType := http.DetectContentType(buff)
fileType = strings.Split(fileType, "/")[0]
switch fileType {
case "image":
return nil
default:
return errors.New("bad type")
}
}
func resizeThumb(file multipart.File, buff, buff_thumbnail *bytes.Buffer) error {
file.Seek(0, 0)
images, _, err := image.Decode(file)
if err != nil {
return err
}
buff.Reset()
images = resize.Thumbnail(200, 200, images, resize.Lanczos3)
images_thumbnail := resize.Thumbnail(80, 80, images, resize.Lanczos3)
err = jpeg.Encode(buff, images, &jpeg.Options{
Quality: 95,
})
if err != nil {
return err
}
err = jpeg.Encode(buff_thumbnail, images_thumbnail, &jpeg.Options{
Quality: 95,
})
return err
}
func handleDownloadImage(w http.ResponseWriter, r *http.Request) {
//Get input value by user
dn := mux.Vars(r)["name"]
size := mux.Vars(r)["size"]
//Check login
login := checkLogin(w, r)
if login == nil {
return
}
var imageName string
if dn != "unknown_profile" {
//Search values with ldap and filter
searchRequest := ldap.NewSearchRequest(
dn,
ldap.ScopeBaseObject, ldap.NeverDerefAliases, 0, 0, false,
"(objectclass=*)",
[]string{PROFILE_PICTURE_FIELD_NAME},
nil)
sr, err := login.conn.Search(searchRequest)
if err != nil {
http.Error(w, "Search: "+err.Error(), http.StatusInternalServerError)
return
}
if len(sr.Entries) != 1 {
http.Error(w, fmt.Sprintf("Not found user: %s cn: %s and numberEntries: %d", dn, strings.Split(dn, ",")[0], len(sr.Entries)), http.StatusInternalServerError)
return
}
imageName = sr.Entries[0].GetAttributeValue(PROFILE_PICTURE_FIELD_NAME)
if imageName == "" {
http.Error(w, "User doesn't have profile image", http.StatusNotFound)
return
}
} else {
imageName = "unknown_profile.jpg"
}
if size == "full" {
imageName = "full_" + imageName
}
//Get the object after connect MC
mc, err := newMinioClient()
if err != nil {
http.Error(w, "MinioClient: "+err.Error(), http.StatusInternalServerError)
return
}
obj, err := mc.GetObject(context.Background(), "bottin-pictures", imageName, minio.GetObjectOptions{})
if err != nil {
http.Error(w, "MinioClient: GetObject: "+err.Error(), http.StatusInternalServerError)
return
}
defer obj.Close()
objStat, err := obj.Stat()
if err != nil {
http.Error(w, "MiniObjet: "+err.Error(), http.StatusInternalServerError)
return
}
//Send JSON through xhttp
w.Header().Set("Content-Type", objStat.ContentType)
w.Header().Set("Content-Length", strconv.Itoa(int(objStat.Size)))
//Copy obj in w
writting, err := io.Copy(w, obj)
if writting != objStat.Size || err != nil {
http.Error(w, fmt.Sprintf("WriteBody: %s, bytes wrote %d on %d", err.Error(), writting, objStat.Size), http.StatusInternalServerError)
return
}
}
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