feat: improve file download handling and update product image display logic

Author: baotoq

code/src/MicroCommerce.ApiService/Features/Products/GetProductImage.cs

@@ -13,7 +13,7 @@ public void MapEndpoint(IEndpointRouteBuilder builder)
     {
         builder.MapGet("/api/products/images/{url}", async (string url, IFileService fileService) =>
         {
-            var stream = await fileService.DownloadFileAsync(url);
+            await using var stream = await fileService.DownloadFileAsync(url);
 
             return TypedResults.File(stream, MediaTypeNames.Image.Jpeg);
         }).Produces<Stream>(contentType: MediaTypeNames.Image.Jpeg);

code/src/MicroCommerce.ApiService/Services/FileService.cs

@@ -1,4 +1,5 @@
 using Azure.Storage.Blobs;
+using Azure.Storage.Blobs.Models;
 
 namespace MicroCommerce.ApiService.Services;
 
@@ -42,17 +43,15 @@ public async Task<Stream> DownloadFileAsync(string fileName, CancellationToken c
         var containerClient = _blobServiceClient.GetBlobContainerClient(ContainerName);
         var blobClient = containerClient.GetBlobClient(fileName);
 
-        var memoryStream = new MemoryStream();
-        var response = await blobClient.DownloadToAsync(memoryStream, cancellationToken);
+        var response = await blobClient.DownloadStreamingAsync(null, cancellationToken);
 
-        if (response.IsError)
+        if (response.GetRawResponse().IsError)
         {
             _logger.LogError("Failed to download file {FileName} from blob storage {Info}", fileName, response.ToString());
             throw new Exception($"Failed to download file {fileName}");
         }
 
-        memoryStream.Position = 0;
-        return memoryStream;
+        return response.Value.Content;
     }
 
     public async Task CreateContainerIfNotExistsAsync(CancellationToken cancellationToken = default)

code/src/MicroCommerce.Web/Components/Shared/ProductCard.razor

@@ -5,7 +5,7 @@
     <img src="images/@Product.ImageUrl" class="card-img-top" alt="@Product.Name">
     <div class="card-body">
         <h5 class="card-title">@Product.Name</h5>
-        <p class="card-text">$@Product.Price.ToString("C", new CultureInfo("en-US"))</p>
+        <p class="card-text">@Product.Price.ToString("C", new CultureInfo("en-US"))</p>
         <button class="btn btn-primary" @onclick="() => AddToCart(Product)">
             <i class="fas fa-cart-plus"></i> Add to Cart
         </button>