DLC - Help downloading assets and saving locally

Questions & Answers
1

Hi All,

I’m currently working on a game that is server oriented.
The game downloads it save file from the server as well as telling the server about each action.

The next part of the game is to be able to download new assets e.g. New player texture.

I currently have my textures in the Resource folder and I use Resource.Load() to load them at runtime.

Is there anyway to download a new image and save it in the resource folder?

Also is it possible to download the new image, and have it stored locally, so next time the game is loaded it won’t need downloading again?

Thanks
Thomas

2

I figured out a better way to do this.

I couldn’t get an image into the resources so I figured another way around it.

First thing I do is check if the image exists in the Resources folder, if that doesn’t exist i then use File.exists to check if the image is in the persistantDataPath subdirectory, if not then use a WWW to download it from my server, and then File.WriteAllBytes to write it to the persistantDataPath.

So from now on, when the game loads it will look in the persistantDataPath and it will load it without checking my server.

It works for what I need and after testing multiple times, the game loads at similar times with the image in the resource folder compared to downloading it from the server.

EXAMPLE

jn is a json node

m.image = Resources.Load<Sprite>("Sprites/" + Path.GetFileNameWithoutExtension(jn["IMG"]));

            if (m.image == null)
            {
                if (!File.Exists(Application.persistentDataPath + "/Sprites/" + jn["IMG"]))
                {
                    string imageURL = "http://localhost/game/Sprites/";
                    www = new WWW(imageURL + jn["IMG"]);
                    yield return www;

                    byte[] bytes = www.texture.EncodeToPNG();
                    File.WriteAllBytes(Application.persistentDataPath + "/Sprites/" + jn["IMG"], bytes);
                    Debug.Log("Downloaded Sprite");
                }
                byte[] data = File.ReadAllBytes(Application.persistentDataPath + "/Sprites/" + jn["IMG"]);
                Texture2D tex = new Texture2D(450, 500, TextureFormat.ARGB32, false);
                tex.LoadImage(data);
                Sprite s = Sprite.Create(tex, new Rect(0, 0, 450, 500), new Vector2(0, 0));
                m.image = s;
            }