How to upload profile picture in unity3d from gallery - unity3d

Question

Code:
IEnumerator PickImage (int maxSize)
{
Texture2D texture = null;
NativeGallery.Permission permission = NativeGallery.GetImageFromGallery (( path) => {
Debug.Log ("Image path: " + path);
if (path != null) {
// Create Texture from selected image
texture = NativeGallery.LoadImageAtPath (path, maxSize);
if (texture == null) {
Debug.Log ("Couldn't load texture from " + path);
return;
}
profileImage.sprite = Sprite.Create (texture, new Rect (0f, 0f, texture.width, texture.height), new Vector2 (0.5f, 0.5f), 100f);
}
}, "Select an image", "image/*", maxSize);
if (texture != null) {
// make texture read and write able
Texture2D readableTexture = DuplicateTexture(texture);
Debug.Log ("readable texture width: " + readableTexture.width + " height: " + readableTexture.height);
WWWForm form = new WWWForm ();
Debug.Log ("player id: " + DataCollection.localPlayer.PlayerId);
form.AddField (GameConstants.ARG_UPLOAD_PHOTO_PLAYER_ID, DataCollection.localPlayer.PlayerId);
form.AddBinaryData (GameConstants.ARG_UPLOAD_PHOTO, readableTexture.GetRawTextureData (), "profilepic.jpg", "image/*");
Dictionary<string,string> headerDisc = form.headers;
WWW www = new WWW (GameConstants.API_UPLOAD_PHOTO, form.data, headerDisc);
yield return www;
if (www.error == null) {
Debug.Log ("Data: " + www.text);
profileImage.sprite = Sprite.Create (texture, new Rect (0f, 0f, texture.width, texture.height), new Vector2 (0.5f, 0.5f), 100f);
} else {
Debug.Log ("Error: " + www.error);
}
}
Debug.Log ("Permission result: " + permission);
}