public static async Task <StorageFile> UpdateBingPicture()
{
string Path = await GetDailyPhotoPath().ConfigureAwait(false);
if ((await ApplicationData.Current.LocalFolder.TryGetItemAsync("BingDailyPicture.jpg")) is StorageFile ExistFile)
{
try
{
if (string.IsNullOrWhiteSpace(Path))
{
return(ExistFile);
}
if (await CheckIfNeedToUpdate().ConfigureAwait(false))
{
StorageFile TempFile = await ApplicationData.Current.TemporaryFolder.CreateFileAsync($"BingDailyPicture_Cache_[{DateTime.Now:yyyy-MM-dd HH-mm-ss}].jpg", CreationCollisionOption.GenerateUniqueName);
using (Stream TempFileStream = (await TempFile.OpenAsync(FileAccessMode.ReadWrite)).AsStream())
{
HttpWebRequest Request = (HttpWebRequest)WebRequest.Create(new Uri($"https://www.bing.com{Path}"));
using (WebResponse Response = await Request.GetResponseAsync().ConfigureAwait(false))
using (Stream ResponseStream = Response.GetResponseStream())
{
await ResponseStream.CopyToAsync(TempFileStream).ConfigureAwait(false);
}
using (Stream FileStream = await ExistFile.OpenStreamForReadAsync().ConfigureAwait(false))
using (MD5 MD5Alg1 = MD5.Create())
using (MD5 MD5Alg2 = MD5.Create())
{
Task <string> CalTask1 = MD5Alg1.GetHashAsync(FileStream);
Task <string> CalTask2 = MD5Alg2.GetHashAsync(TempFileStream);
string [] ResultArray = await Task.WhenAll(CalTask1, CalTask2).ConfigureAwait(false);
if (ResultArray[0] == ResultArray[1])
{
return(ExistFile);
}
}
TempFileStream.Seek(0, SeekOrigin.Begin);
using (StorageStreamTransaction Transaction = await ExistFile.OpenTransactedWriteAsync())
{
await TempFileStream.CopyToAsync(Transaction.Stream.AsStreamForWrite()).ConfigureAwait(false);
await Transaction.CommitAsync();
}
}
return(ExistFile);
}
else
{
return(ExistFile);
}
}
catch (Exception ex)
{
LogTracer.Log(ex, $"An error was threw in {nameof(UpdateBingPicture)}");
return(ExistFile);
}
}
else
{
try
{
if (string.IsNullOrWhiteSpace(Path))
{
return(null);
}
StorageFile TempFile = await ApplicationData.Current.TemporaryFolder.CreateFileAsync($"BingDailyPicture_Cache_[{DateTime.Now:yyyy-MM-dd HH-mm-ss}].jpg", CreationCollisionOption.GenerateUniqueName);
using (Stream TempFileStream = (await TempFile.OpenAsync(FileAccessMode.ReadWrite)).AsStream())
{
HttpWebRequest Request = (HttpWebRequest)WebRequest.Create(new Uri($"https://www.bing.com{Path}"));
using (WebResponse Response = await Request.GetResponseAsync().ConfigureAwait(false))
using (Stream ResponseStream = Response.GetResponseStream())
{
await ResponseStream.CopyToAsync(TempFileStream).ConfigureAwait(false);
}
StorageFile BingDailyPictureFile = await ApplicationData.Current.LocalFolder.CreateFileAsync("BingDailyPicture.jpg", CreationCollisionOption.ReplaceExisting);
using (StorageStreamTransaction Transaction = await BingDailyPictureFile.OpenTransactedWriteAsync())
{
TempFileStream.Seek(0, SeekOrigin.Begin);
await TempFileStream.CopyToAsync(Transaction.Stream.AsStreamForWrite()).ConfigureAwait(false);
await Transaction.CommitAsync();
}
return(BingDailyPictureFile);
}
}
catch (Exception ex)
{
LogTracer.Log(ex, $"An error was threw in {nameof(UpdateBingPicture)}");
return(null);
}
}
}
public static async Task <StorageFile> DownloadDailyPicture()
{
string Path = await GetDailyPhotoPath().ConfigureAwait(true);
try
{
if ((await ApplicationData.Current.LocalFolder.TryGetItemAsync("BingDailyPicture.jpg")) is StorageFile ExistFile)
{
if (string.IsNullOrWhiteSpace(Path))
{
return(ExistFile);
}
StorageFile TempFile = await ApplicationData.Current.TemporaryFolder.CreateFileAsync("BingDailyPicture_Cache.jpg", CreationCollisionOption.ReplaceExisting);
using (Stream TempFileStream = (await TempFile.OpenAsync(FileAccessMode.ReadWrite)).AsStream())
{
try
{
await Task.Run(() =>
{
HttpWebRequest Request = (HttpWebRequest)WebRequest.Create(new Uri($"https://www.bing.com{Path}"));
using (WebResponse Response = Request.GetResponse())
using (Stream ResponseStream = Response.GetResponseStream())
{
ResponseStream.CopyTo(TempFileStream);
}
}).ConfigureAwait(false);
}
catch
{
return(ExistFile);
}
using (Stream FileStream = await ExistFile.OpenStreamForReadAsync().ConfigureAwait(false))
{
if (FileStream.ComputeMD5Hash() == TempFileStream.ComputeMD5Hash())
{
return(ExistFile);
}
}
}
await TempFile.MoveAndReplaceAsync(ExistFile);
return(ExistFile);
}
else
{
if (string.IsNullOrWhiteSpace(Path))
{
return(null);
}
StorageFile BingDailyPictureFile = await ApplicationData.Current.LocalFolder.CreateFileAsync("BingDailyPicture.jpg", CreationCollisionOption.ReplaceExisting);
using (Stream FileStream = await BingDailyPictureFile.OpenStreamForWriteAsync().ConfigureAwait(false))
{
await Task.Run(() =>
{
HttpWebRequest Request = (HttpWebRequest)WebRequest.Create(new Uri($"https://www.bing.com{Path}"));
using (WebResponse Response = Request.GetResponse())
using (Stream ResponseStream = Response.GetResponseStream())
{
ResponseStream.CopyTo(FileStream);
}
}).ConfigureAwait(false);
}
return(BingDailyPictureFile);
}
}
catch
{
return(null);
}
}
