Open a File Stream in WebGL

Hi

Is there any way to open a file stream from a file stored in streaming assets? Currently thought i may have a way of doing it but whenever i then try and look into the database for information it crashes and throws memory access errors.

I have a database in the streaming assets that is able to run online but i need to be able to access this information. Other thinking is can i download and cache this locally and then file stream from the local file in Temp or somewhere else (I have seen a few ways to upload an image from your desktop and wondering if this would work with a file stream)

Thanks

 

Hi
So i have got a unity web request accessing the file and giving me back the byte[] data then using this to create a memory stream which i was hoping would allow me to access the data. however although the memory stream is created and contains the correct number of bytes, I am unable to then access the stream afterwards. Any idea what could be causing this?

 

Code (CSharp):

1.     MemoryStream theMemStream;
2.  
3.     // Start is called before the first frame update
4.     IEnumerator Start()
5.     {
6.        yield return StartCoroutine(Stream());
7.      
8.         Debug.Log(theMemStream.Length);
9.  
10.         LiteDatabase liteDatabase = new LiteDatabase(theMemStream);
11.  
12.         IEnumerable<string> x = liteDatabase.GetCollectionNames();
13.         foreach (string variable in x)
14.         {
15.             Debug.Log(variable);
16.         }
17.  
18.  
19.         Debug.Log("Hello");
20.         //Debug.Log(liteDatabase.GetCollection<MyData>().Count());
21.         List<MyData> data = liteDatabase.GetAllCollectionData<MyData>();
22.        Debug.Log(data.Count);
23.        foreach (MyData myData in data)
24.        {
25.            Debug.Log(myData.Message);
26.            message = myData.Message;
27.        }
28.        Debug.Log("Do we even get here");
29.     }
30.  
31.     IEnumerator Stream()
32.     {
33.  
34.         string url = Path.Combine(Application.streamingAssetsPath, "Blank.db");
35.         Debug.Log(url);
36.         //UnityWebRequest request = new UnityWebRequest();
37.         byte[] dbData;
38.      
39.         //Check if we should use UnityWebRequest or File.ReadAllBytes
40.         if (url.Contains("://") || url.Contains(":///"))
41.         {
42.             UnityWebRequest www = UnityWebRequest.Get(url);
43.             yield return www.SendWebRequest();
44.             dbData = www.downloadHandler.data;
45.         }
46.         else
47.         {
48.             dbData = File.ReadAllBytes(url);
49.         }
50.  
51.        // yield return request.SendWebRequest();
52.      
53.         Debug.Log(dbData.Length);
54.      
55.       //  Debug.Log("Downloading File");
56.       //  DownloadFile(imgData, imgData.Length, "blank.db");
57.      
58.         theMemStream = new MemoryStream();
59.  
60.         theMemStream.Write(dbData, 0, dbData.Length);
61.      
62.         Debug.Log($"Memory stream is {theMemStream.Length} bytes");
63.     }

This is what i have so far. Error being generated after the build it as followed
"exception thrown: RuntimeError: index out of bounds,@blob:null/9fb8a57f-4ab1-44f8-8d21-4764a76e9f76 line 275 > WebAssembly.instantiate:wasm-function[14213]:0x5940aa"

The get collections names outputs fine, but then the getting data within them causing this error

 

Thanks ill give that a go and see what results i get out of that