How to load and save data within webGL build?,Persistent load save data on webgl

Question

Hi all,

Im really stuck at this specific problem where I have a game where you load and save data. When I build it as a WebGL and upload all files to a webserver my problem appear. I want the data to be persistent even if I run the game with different webbrowsers or a different PC. I cant find a method to perserv the data this way. If I save som data on my PC, I cant see it on the next PC. The game works exactly how I want it if I build as "PC, Mac & Linux Standalone". Altough if I move the game to another PC (and not along the profiles "appdata") I recreate the problem.

PlayerPrefs I learned this coding from here: https://docs.unity3d.com/2017.4/Documentation/ScriptReference/PlayerPrefs.html This is the best feature and works perfect for my game, if I just play it on the same PC with the one webbrowser. Loads and Saves data from/in IndexedDB "/idbfs/xxxxxxxxxxxxxxxxxxxx/PlayerPrefs" in the players webbrowser.

Application.persistentDataPath - with BinaryFormatter, Serialize and Deserialize I learned this coding from here: https://unity3d.com/learn/tutorials/topics/scripting/persistence-saving-and-loading-data Ok method but unfortunately it works similar to PlayerPrefs. Ofcourse works on Editor/PC.

StreamReader I learned this coding from here: https://support.unity3d.com/hc/en-us/articles/115000341143-How-do-I-read-and-write-data-from-a-text-file- This didn't work for me, webbrowser or webserver could'nt find path. The file exist on path. Ofcourse works on Editor/PC.

UnityWebRequest I learned this coding from here: https://docs.unity3d.com/ScriptReference/Networking.UnityWebRequest.html This didn't work for me, webbrowser or webserver could'nt find path. The file exist on path.

This is my "test game" for making this work. A inputField to collect data, a button for save and a text thing to display loaded data.

 using UnityEngine.UI;
 using UnityEngine;
 
 public class Action : MonoBehaviour {
 
     public Text theList;
     public Button AddButton;
     public InputField inputText;
 
 
     // Use this for initialization
     void Start ()
     {
         Button rbutton = AddButton.GetComponent<Button>();
         rbutton.onClick.AddListener(TaskOnClickAdd);
         Load();
     }
 
     void TaskOnClickAdd()
     {
         Save();
         Load();
     }
 
     public void Save()
     {
         // Some cool scripting for saving data for global use in WebGL
 
     }
 
     public void Load()
     {
 
         // Some cool scripting for loading data for global use in WebGL
 
     }
 
 }

Please, Can anyone point me to a valid method to use for load/save data on a WebGL build?

Thanks

Answer 1

I have tried a fifth method.

I learned it from here: https://docs.unity3d.com/ScriptReference/WWW.html.

I have managed to load my data from a url-textfile. But I can't figure out how to save data.

I get this error message in debug:

Generic/unknown HTTP error

UnityEngine.Debug:Log(Object)

c__Iterator0:MoveNext() (at Assets/_Scripts/Action.cs:37)

UnityEngine.SetupCoroutine:InvokeMoveNext(IEnumerator, IntPtr)

Here is my code:

 using UnityEngine.UI;
 using UnityEngine;
 using System;
 using System.Collections;
 using UnityEngine.Networking;

 public class Action : MonoBehaviour {
 
     public Text theList;
     public Button AddButton;
     public InputField inputText;
 
     // Use this for initialization
     void Start ()
     {
         StartCoroutine(Load());
         StartCoroutine(Save());
         Button rbutton = AddButton.GetComponent<Button>();
         rbutton.onClick.AddListener(TaskOnClickAdd);
         Load();
     }
 
     void TaskOnClickAdd()
     {
         Save();
         Load();
     }
 
     IEnumerator Save()
     {
         byte[] myData = System.Text.Encoding.UTF8.GetBytes("This is some test data");
         UnityWebRequest www = UnityWebRequest.Put("https://domain.se/filer/test2/test.txt", myData);
         yield return www.SendWebRequest();
 
         if (www.isNetworkError || www.isHttpError)
         {
             Debug.Log(www.error);
         }
         else
         {
             Debug.Log("Upload complete!");
         }
 
     }
 
     IEnumerator Load()
     {
         UnityWebRequest www = UnityWebRequest.Get("https://domain.se/filer/test2/test.txt");
         yield return www.SendWebRequest();
 
         if (www.isNetworkError || www.isHttpError)
         {
             Debug.Log(www.error);
         }
         else
         {
             Debug.Log(www.downloadHandler.text);
             theList.text = www.downloadHandler.text;
         }
     }
 
 }

How to load and save data within webGL build?,Persistent load save data on webgl

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