Upload file from android to PHP server using retrofit - php

Question

I have some problem with uploading image into PHP server. In this case, first I'l get image from gallery than create the output as base64, then I convert base64 to file using stream, then upload it into server. Here is my code.
UploadActivity.kt
private fun updatePhoto(variable: String, file: Bitmap, userId: String) {
val encode = encodedImage(file)
val outputDir: File = this.cacheDir
val f = File.createTempFile(userId, ".jpeg", outputDir)
var fos: FileOutputStream? = null
try {
fos = FileOutputStream(f)
} catch (e: FileNotFoundException) {
e.printStackTrace()
}
try {
fos!!.write(encode)
fos.flush()
fos.close()
} catch (e: IOException) {
e.printStackTrace()
}
val builder = MultipartBody.Builder()
builder.setType(MultipartBody.FORM)
val requestFile = f.asRequestBody(getMimeType(f.path)?.toMediaTypeOrNull())
builder.addFormDataPart(variable, f.name, requestFile)
builder.addFormDataPart("userId", userId)
val apiService = ApiInterface.create()
val call = apiService.updatePicture(builder.build())
call.enqueue(object : Callback<UserModel> {
override fun onResponse(
call: Call<UserModel>,
response: retrofit2.Response<UserModel>?
) {
val jsonObject = response!!.body()
val returnedResponse = jsonObject!!.status
if (returnedResponse!!.trim { it <= ' ' } == "200") {
val intent = Intent(this#UploadPreviewActivity, ProfileActivity::class.java)
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK
startActivity(intent)
finish()
} else {
Toast.makeText(
this#UploadPreviewActivity,
"Terjadi kesalahan, harap coba kembali.",
Toast.LENGTH_SHORT
).show()
}
}
override fun onFailure(call: Call<UserModel>, t: Throwable) {
call.cancel()
Toast.makeText(
this#UploadPreviewActivity,
"Harap periksa koneksi internet anda",
Toast.LENGTH_LONG
).show()
}
})
}
Interface.kt
#POST("user-update-picture")
fun updatePicture(#Body requestBody: RequestBody): Call<UserModel>
Upload.php
function resize_image($file) {
$src = imagecreatefromstring($file);
if (!$src) return false;
$width = imagesx($src);
$height = imagesy($src);
$newwidth = $width*0.5;
$newheight = $height*0.5;
$dst = imagecreatetruecolor($newwidth, $newheight);
imagecopyresampled($dst, $src, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
ob_start();
imagejpeg($dst);
$data = ob_get_contents();
ob_end_clean();
return $data;
}
function decodeImage($picturePath, $dir, $dir_thumb, $userId){
$image = str_replace('data:image/png;base64,', '', str_replace('[removed]', '', $picturePath));
$image = str_replace(' ', '+', $image);
$data = base64_decode($image);
$data2 = base64_decode($picturePath);
$thumb = $this->resize_image($data2);
$file = './files/images/'.$dir.'/'.$userId.'.jpg';
$upload = file_put_contents($file, $data);
$file2 = './files/images/'.$dir_thumb.'/'.$userId.'.jpg';
$upload2 = file_put_contents($file2, $thumb);
}
public function picture_post(){
date_default_timezone_set('Asia/Jakarta');
$Date = date('Y-m-d H:i:s');
$userId = filter_var($this->post('userId'), FILTER_SANITIZE_NUMBER_INT);
if (isset($_FILES['userPhotoPath']['tmp_name']) && !empty($_FILES['userPhotoPath']['tmp_name']) && $_FILES['userPhotoPath']['tmp_name']!=NULL) {
$photoPath = $_FILES['userPhotoPath']['tmp_name'];
$photoType = $_FILES['userPhotoPath']['type'];
$photoData = file_get_contents($photoPath);
$userPhotoPath = 'data:' . $photoType . ';base64,' . base64_encode($photoData);
if(file_exists("./files/images/users/".$userId.".jpg")){
$unlink = unlink("./files/images/users/".$userId.".jpg");
}
if(file_exists("./files/images/users_thumb/".$userId.".jpg")){
$unlink2 = unlink("./files/images/users_thumb/".$userId.".jpg");
}
$this->decodeImage($userPhotoPath, 'users', 'users_thumb', $userId);
}else{
$userPhotoPath = NULL;
}
}
Then when I upload the file from android I get this error in Okhttp Log
Message: imagecreatefromstring(): Data is not in a recognized format
Backtrace:
Function: imagecreatefromstring
I don't know why, because my PHP code work with my web version of this application with same upload method using javascript

Answer 1

I solve this issue by my self and this my mistake,
I change this code
function decodeImage($picturePath, $dir, $dir_thumb, $userId){
$image = str_replace('data:image/png;base64,', '', str_replace('[removed]', '', $picturePath));
$image = str_replace(' ', '+', $image);
$data = base64_decode($image);
$data2 = base64_decode($picturePath);
$thumb = $this->resize_image($data2);
$file = './files/images/'.$dir.'/'.$userId.'.jpg';
$upload = file_put_contents($file, $data);
$file2 = './files/images/'.$dir_thumb.'/'.$userId.'.jpg';
$upload2 = file_put_contents($file2, $thumb);
}
into this
function decodeImage($picturePath, $dir, $dir_thumb, $userId){
$image = str_replace('data:image/png;base64,', '', str_replace('[removed]', '', $picturePath));
$image = str_replace(' ', '+', $image);
$data = base64_decode($image);
$thumb = $this->resize_image($data);
$file = './files/images/'.$dir.'/'.$userId.'.jpg';
$upload = file_put_contents($file, $data);
$file2 = './files/images/'.$dir_thumb.'/'.$userId.'.jpg';
$upload2 = file_put_contents($file2, $thumb);
}
This is my little mistake I forgot about the rezise_image content requirement, after change that code this upload work 100% without any problem again.