feat: use local blob storage

backend/src/Socialize.Api/Program.cs

@@ -2,7 +2,10 @@ using Azure.Identity;
 using FastEndpoints;
 using FastEndpoints.Swagger;
 using Microsoft.AspNetCore.HttpOverrides;
+using Microsoft.Extensions.Options;
 using Socialize;
+using Socialize.Api.Infrastructure.BlobStorage.Configuration;
+using Socialize.Api.Infrastructure.BlobStorage.Services;
 using Socialize.Api.Infrastructure;
 using Socialize.Api.Infrastructure.Development;
 using Socialize.Api.Modules.Approvals;
@@ -92,6 +95,38 @@ if (!app.Environment.IsDevelopment())
 
 app.UseHealthChecks("/health");
 
+LocalBlobStorageOptions localBlobStorageOptions = app.Services
+    .GetRequiredService<IOptions<LocalBlobStorageOptions>>()
+    .Value;
+
+string localBlobStorageRoot = app.Services
+    .GetRequiredService<LocalBlobStorage>()
+    .GetRootPath();
+string localBlobStorageRootWithSeparator = Path.EndsInDirectorySeparator(localBlobStorageRoot)
+    ? localBlobStorageRoot
+    : $"{localBlobStorageRoot}{Path.DirectorySeparatorChar}";
+
+Directory.CreateDirectory(localBlobStorageRoot);
+
+app.MapGet(
+    $"{LocalBlobStorage.NormalizeRequestPath(localBlobStorageOptions.RequestPath)}/{{**blobPath}}",
+    async (
+        string blobPath,
+        CancellationToken ct) =>
+    {
+        string filePath = Path.GetFullPath(Path.Combine(localBlobStorageRoot, blobPath));
+        if (!filePath.StartsWith(localBlobStorageRootWithSeparator, StringComparison.Ordinal) ||
+            filePath.EndsWith(".content-type", StringComparison.OrdinalIgnoreCase) ||
+            !File.Exists(filePath))
+        {
+            return Results.NotFound();
+        }
+
+        string contentType = LocalBlobStorage.ReadContentType(filePath) ?? "application/octet-stream";
+        byte[] bytes = await File.ReadAllBytesAsync(filePath, ct);
+        return Results.File(bytes, contentType);
+    });
+
 if (!app.Environment.IsDevelopment())
 {
     app.UseHttpsRedirection();