How to serve video file / stream from ASP Net Core 6 Minimal API-CodePudding

I was trying to achieve this following different tutorials but did not succeed. How do I handle a http range request in minimal API to serve video stream ?

I have this bare minimal setup code for API with a single GET path "/video" mapped. I also made a folder "wwwroot" inside project folder. I placed in there a mp4 video file named "test.mp4". Would it be possible for someone knowledgeable to write a simple example of how to stream this file inside my mapped route ?

var builder = WebApplication.CreateBuilder(args);
    
 builder.Services.AddEndpointsApiExplorer();
 builder.Services.AddSwaggerGen();
    
 var app = builder.Build();
    
 if (app.Environment.IsDevelopment())
 {
     builder.Logging.AddJsonConsole();
     app.UseSwagger();
     app.UseSwaggerUI();
 }
    
 app.UseHttpsRedirection();
    
 app.MapGet("/video", () =>
 {    
    
    
 });

CodePudding user response：

You can use the Results.Stream() method to return a stream from a minimal api.

string wwwroot = builder.Environment.WebRootPath;
...
app.MapGet("/video", () =>
{
    string filePath = Path.Combine(wwwroot, "test.mp4");
    return Results.Stream(new FileStream(filePath, FileMode.Open));
});

The stream parameter is disposed after the response is sent.

Results.Stream takes a few other optional parameters such as fileDownloadName, and contentType (which defaults to "application/octet-stream") that might be useful to you. Set enableRangeProcessing: true to enable range requests.

The above could easily be adapted to take a filename as a parameter, if you wish. You would need to consider validation (applies equally to the current code TBH). Tested and working for me.