public Stream GetAvatarStream(string key)
{
if (string.IsNullOrEmpty(key))
{
return(null);
}
var avatar = _avatarDirectoryInfo.GetFile(key + ".jpg");
if (avatar.Exists)
{
return(avatar.Open(FileMode.Open));
}
return(null);
}
public string UploadAvatar(IFormFile file, string key)
{
if (file.Length >= 300000)
{
throw new Exception("Uploaded image may not exceed 300 kb, please upload a smaller image.");
}
try
{
using (var readStream = file.OpenReadStream())
{
using (var img = Image.FromStream(readStream))
{
if (!img.RawFormat.Equals(ImageFormat.Jpeg) && !img.RawFormat.Equals(ImageFormat.Png))
{
throw new Exception("Uploaded file is not recognized as an image.");
}
var fileName = key + ".png";
try
{
// Check if previous avatar exists
var avatar = _avatarDirectoryInfo.GetFile(fileName);
if (avatar.Exists)
{
// delete the file
avatar.Delete();
}
// finally, build the image
AvatarBuilder.Build(readStream, fileName);
}
catch (Exception ex)
{
throw new Exception("Uploaded file is not recognized as a valid image.", ex);
}
return(key);
}
}
}
catch (Exception)
{
throw new Exception("Uploaded file is not recognized as an image.");
}
}
/// <summary>
/// Gets the full path of the file for the specified destination.
/// </summary>
/// <param name="fileResult">
/// The file result to get the path for.
/// </param>
/// <param name="destination">
/// The destination directory.
/// </param>
/// <returns>
/// The full path of the file.
/// </returns>
public IFileInfo GetFullPath(FileResult fileResult, IDirectoryInfo destination)
{
if (fileResult.Incomplete)
{
throw new InvalidOperationException("There is not enough data to get the file path.");
}
return(destination.GetFile(FormatOutputPath(fileResult)));
}
public string UploadImage(Image image)
{
// TODO: maybe a global lock while we upload this image?
var fileName = RandomKey() + ".jpg";
while (_thumbnailDirectory.FileExists(fileName))
{
fileName = RandomKey() + ".jpg";
}
try
{
_thumbnailDirectory.GetFile(fileName).Open(FileMode.Create, stream => image.Save(stream, ImageFormat.Jpeg));
}
catch (Exception)
{
try
{
// if there was any issue, try to delete the file, if we created
if (_thumbnailDirectory.FileExists(fileName))
{
_thumbnailDirectory.DeleteFile(fileName);
}
}
catch (Exception)
{
// the error was more fundamental.
// don't do anything with this exception.
// let the previous exception be the real one thrown.
}
throw;
}
return(fileName);
}
/// <summary>
/// Gets the full path of the file for the specified destination.
/// </summary>
/// <param name="destination">
/// The destination directory.
/// </param>
/// <param name="provider">
/// The storage provider.
/// </param>
/// <returns>
/// The full path of the file.
/// </returns>
internal IFileInfo GetFullPath(IDirectoryInfo destination, IStorageProvider provider)
{
if (this.Incomplete)
{
throw new InvalidOperationException("There is not enough data to get the file path.");
}
return destination.GetFile(this.FormatOutputPath(this.GetOuptutFormat(provider)));
}
