Unable to download an exe file

[ltemimi]

Hi

I am unable to download an exe file I get "error reload the page" yet I am able to download exe files from websites so I do not think it is a system or browser settings issue.

I am able to download msi files .

Thanks

Laz

[arivera12]

How do you are downloading the file? As a stream or byte[]?

[ltemimi]

yes as a stream of bytes

var bytes = FileHelper.GetFileBytes(filePatch); var result = await BlazorDownloadFileService.DownloadFile(fileToDownload, bytes, "application/octet-stream");

[arivera12]

can you share any screenshot of the error? How big is the file?

[ltemimi]

all other files (bigger) download OK issue just with exe file

[arivera12]

This error seems or may be related to this one #25

[arivera12]

Pretty weird the other bigger files downloads ok but not the exe file...

[ltemimi]

Hi

I increased the buffer size and I am now able to download my 110MB exe file but it takes 2 minutes for the download dialog to appear. I am using Blazor server app.

Is there a way of speeding the download up?

Thanks

[arivera12]

Thats something I forgot to ask about...

If it's blazor wasm or blazor server.

Blazor server transmit data using signal r and there are limitations on this.

I left those notations in the main readme.md of this repository

Take a look of this where I do left written some performance considerations and understandings.

https://github.com/arivera12/BlazorDownloadFile#performance-considerations-and-understandings

The next link is the signal r documentation and based on this you need to do buffer management based on your signal r ApplicationMaxBufferSize and TransportMaxBufferSize

ApplicationMaxBufferSize is the incoming connection buffer size

TransportMaxBufferSize is the outgoing connection buffer size (This is the one you need to increase download speed)

https://docs.microsoft.com/en-us/aspnet/core/signalr/security?view=aspnetcore-3.1#buffer-management

Based on this you need to download your file using the overload methods which manages the download buffer internally.

BlazorDownloadFile/BlazorDownloadFile/Service/BlazorDownloadFileService.cs

Line 255 in 10b471c

public async ValueTask<DowloadFileResult> DownloadFile(string fileName, byte[] bytes, int bufferSize = 32768, string contentType = "application/octet-stream", IProgress<double>? progress = null)

[arivera12]

Hi

I increased the buffer size and I am now able to download my 110MB exe file but it takes 2 minutes for the download dialog to appear. I am using Blazor server app.

Is there a way of speeding the download up?

Thanks

Answering your question:

You can speed up download by increasing the buffer size.

[arivera12]

I increased the buffer size and I am now able to download my 110MB exe file but it takes 2 minutes for the download dialog to appear. I am using Blazor server app.

How much did you increased the buffer size and where did you increase it?

Blazor server app?

Or on blazor download file method?

Both sides?

[ltemimi]

 endpoints.MapBlazorHub(o =>
                {
                    o.TransportMaxBufferSize = 1024*128;
                    o.ApplicationMaxBufferSize = 1024*128;
                });

 var result =  await BlazorDownloadFileService.DownloadFile(fileToDownload, bytes, 1024*64);

The signal R buffer increase do not make any difference to the loading of the file from the server to be downloaded by the client

I am grateful for the help

[arivera12]

 endpoints.MapBlazorHub(o =>
                {
                    o.TransportMaxBufferSize = 1024*128;
                    o.ApplicationMaxBufferSize = 1024*128;
                });

 var result =  await BlazorDownloadFileService.DownloadFile(fileToDownload, bytes, 1024*64);

The signal R buffer increase do not make any difference to the loading of the file from the server to be downloaded by the client

I am grateful for the help

The only way to speed up download speed is to increase the buffer size here

BlazorDownloadFileService.DownloadFile(fileToDownload, bytes, 1024*64);

Bigger the buffer size, bigger are the chunks that are send from the server to the client.

Take note that your internet service provider speed is also a variant on your download speed.

As far I know there is nothing else we can do to speed up download rather than just increasing the download buffer size.

[arivera12]

Since this question was asked only for downloading exe file and you asked me about download speed I created a new issue for that. Please refer to this issue since downloading the exe file was already resolved for you. #27