Merge pull request #1037 from cocoa-mhlw/fix/set_content_type_when_wi…

…rte_blob_storage

refactoring

src/Covid19Radar.Background/Services/TemporaryExposureKeyBlobService.cs

@@ -13,6 +13,7 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Net.Mime;
 using System.Threading.Tasks;
 
 namespace Covid19Radar.Background.Services
@@ -22,8 +23,6 @@ public class TemporaryExposureKeyBlobService : ITemporaryExposureKeyBlobService
  const string batchNumberMetadataKey = "batch_number";
  const string batchRegionMetadataKey = "batch_region";
  const string fileNameSuffix = ".zip";
- private readonly static string _contentTypeJson = @"application/json";
- private readonly static string _contentTypeZip = @"application/zip";
 
  public readonly string TekExportKeyUrl;
  public readonly string TekExportBlobStorageConnectionString;
@@ -64,9 +63,9 @@ public async Task WriteToBlobAsync(Stream s, TemporaryExposureKeyExportModel mod
  blockBlob.Metadata[batchNumberMetadataKey] = model.BatchNum.ToString();
  blockBlob.Metadata[batchRegionMetadataKey] = model.Region;
 
- if(blockBlob.Properties.ContentType != _contentTypeZip)
+ if(blockBlob.Properties.ContentType != MediaTypeNames.Application.Zip)
  {
- blockBlob.Properties.ContentType = _contentTypeZip;
+ blockBlob.Properties.ContentType = MediaTypeNames.Application.Zip;
  }
  await blockBlob.UploadFromStreamAsync(s);
  Logger.LogInformation($" {nameof(WriteToBlobAsync)} upload {exportFileName}");
@@ -126,9 +125,9 @@ public async Task WriteFilesJsonAsync(IEnumerable<TemporaryExposureKeyExportMode
  await writer.FlushAsync();
  await stream.FlushAsync();
  stream.Position = 0;
- if (blockBlob.Properties.ContentType != _contentTypeJson)
+ if (blockBlob.Properties.ContentType != MediaTypeNames.Application.Json)
  {
- blockBlob.Properties.ContentType = _contentTypeJson;
+ blockBlob.Properties.ContentType = MediaTypeNames.Application.Json;
  }
  await blockBlob.UploadFromStreamAsync(stream);
  }