sample for Results.Stream

aspnetcore/fundamentals/minimal-apis/resultsStream/7.0-samples/ResultsStreamSample/Program.cs

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+using Azure.Storage.Blobs;
+using Microsoft.Net.Http.Headers;
+using SixLabors.ImageSharp;
+using SixLabors.ImageSharp.Formats.Jpeg;
+using SixLabors.ImageSharp.Processing;
+
+var builder = WebApplication.CreateBuilder(args);
+
+var app = builder.Build();
+
+app.MapGet("/process-image", (HttpContext http, CancellationToken token) =>
+{
+    http.Response.Headers.CacheControl = $"public,max-age={TimeSpan.FromHours(24).TotalSeconds}";
+    return Results.Stream(stream => ProcessImage(stream, token), "image/jpeg");
+});
+
+async Task ProcessImage(Stream stream, CancellationToken token)
+{
+    using var image = await Image.LoadAsync("wwwroot/img/microsoft.jpeg", token);
+    int width = image.Width / 2;
+    int height = image.Height / 2;
+    image.Mutate(x => x.Resize(width, height));
+    await image.SaveAsync(stream, JpegFormat.Instance, cancellationToken: token);
+}
+
+// For local development use Azure Storage Emulator and Azure Storage Explorer 
+// https://docs.microsoft.com/en-us/azure/storage/common/storage-use-emulator
+// https://azure.microsoft.com/en-us/features/storage-explorer/
+app.MapGet("/stream-image", async (CancellationToken token) =>
+{
+    BlobContainerClient blobContainerClient = new BlobContainerClient("UseDevelopmentStorage=true", "pictures");
+    BlobClient blobClient = blobContainerClient.GetBlobClient("microsoft.jpeg");
+    return Results.Stream(await blobClient.OpenReadAsync(cancellationToken: token), "image/jpeg");
+});
+
+app.MapGet("/stream-video", async (HttpContext http, CancellationToken token) =>
+{
+    BlobContainerClient blobContainerClient = new BlobContainerClient("UseDevelopmentStorage=true", "videos");
+    BlobClient blobClient = blobContainerClient.GetBlobClient("earth.mp4");
+
+    var properties = await blobClient.GetPropertiesAsync(cancellationToken: token);
+
+    DateTimeOffset lastModified = properties.Value.LastModified;
+    long length = properties.Value.ContentLength;
+
+    long etagHash = lastModified.ToFileTime() ^ length;
+    var entityTag = new EntityTagHeaderValue('\"' + Convert.ToString(etagHash, 16) + '\"');
+
+    http.Response.Headers.CacheControl = "public,max-age=86400";
+
+    // This is an alias for File(Stream, string, string?, DateTimeOffset?, EntityTagHeaderValue?, bool);
+    // When fileDownloadName: "rotating-earth.mp4" is added the Content-Disposition header is set to, 'attachment; filename="rotating-earth.mp4"'
+    // Else it will show the video inline in the browser
+    return Results.Stream(await blobClient.OpenReadAsync(cancellationToken: token), 
+        contentType: "video/mp4",
+        lastModified: lastModified,
+        entityTag: entityTag,
+        enableRangeProcessing: true);
+});
+
+app.Run();

aspnetcore/fundamentals/minimal-apis/resultsStream/7.0-samples/ResultsStreamSample/ResultsStreamSample.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net7.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <None Remove="microsoft.jpeg" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Azure.Storage.Blobs" Version="12.13.0" />
+    <PackageReference Include="SixLabors.ImageSharp" Version="2.1.3" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Content Update="wwwroot\img\microsoft.jpeg">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+
+</Project>