public ImageProcessing ToImageProcessing(ResizeRequest resizeRequest, string filePath)
{
var result = new ImageProcessing()
{
Url = resizeRequest.Path,
ContentType = resizeRequest.ContentType,
Format = resizeRequest.Format ?? options.Value.Default.Format,
Mode = resizeRequest.Mode ?? options.Value.Default.FitMode,
Quality = resizeRequest.Quality ?? options.Value.Default.Quality,
Anchor = resizeRequest.Anchor ?? options.Value.Default.Anchor,
Height = resizeRequest.Height,
Width = resizeRequest.Width,
Path = filePath,
};
var resizeFileName = result.GetResizeName();
var requestedDirectory = Path.GetDirectoryName(result.Url);
result.ResizeUrl = ToUrlPath(
Path.Combine(options.Value.CachePath, RemoveRootSlash(requestedDirectory), resizeFileName)
);
result.ResizePath = Path.Combine(_cachePath, RemoveRootSlash(requestedDirectory), resizeFileName);
return(result);
}
private bool Limited(ResizeRequest resizeRequested)
{
if (resizeRequested.Width > options.Value.MaxWidth)
{
return(true);
}
if (resizeRequested.Height > options.Value.MaxHeight)
{
return(true);
}
return(false);
}
public static ResizeRequest CreateFormHttpContext(this HttpContext httpContext)
{
var resizeRequest = new ResizeRequest(httpContext.Request.Path);
var queryCollection = httpContext.Request.Query;
resizeRequest.Width = queryCollection.ExtractValue <int?>("width", "w");
resizeRequest.Height = queryCollection.ExtractValue <int?>("height", "h");
resizeRequest.Format = queryCollection.ExtractValue <OutputFormat?>("format", "f");
resizeRequest.Quality = queryCollection.ExtractValue <int?>("quality", "q");
resizeRequest.Anchor = queryCollection.ExtractValue <AnchorLocation?>("anchor", "a");
resizeRequest.Mode = queryCollection.ExtractValue <FitMode?>("mode", "m");
return(resizeRequest);
}
public UrlImageResizerException(ResizeRequest resizeRequest, string message, Exception ex = null) : base(message, ex)
{
ResizeRequest = resizeRequest;
}
public string GetResizedUrl(ResizeRequest resizeRequested)
{
var returnPath = resizeRequested.Path;
if (Limited(resizeRequested))
{
if (options.Value.IgnoreLimitation)
{
return(returnPath);
}
else
{
throw new UrlImageResizerException(resizeRequested, "bad request");
}
}
var fileInfo = _fileProvider.GetFileInfo(resizeRequested.Path);
if (!fileInfo.Exists)
{
_logger.FileNotFound(fileInfo.PhysicalPath);
if (options.Value.IgnoreFileNotFound)
{
return(returnPath);
}
else
{
throw new UrlImageResizerException(resizeRequested, "File not found.");
}
}
var imageProcessing = ToImageProcessing(resizeRequested, fileInfo.PhysicalPath);
var resizeFileInfo = _fileProvider.GetFileInfo(imageProcessing.ResizeUrl);
if (resizeFileInfo.Exists)
{
returnPath = imageProcessing.ResizeUrl;
}
else
{
var pathLock = pathLocks.GetOrAdd(resizeRequested.Path.ToLower(), new object());
lock (pathLock)
{
try
{
if (!resizeFileInfo.Exists)
{
EnsureDirectoryExist(imageProcessing);
_imageResizer.Processing(imageProcessing);
}
returnPath = imageProcessing.ResizeUrl;
resizeFileInfo = _fileProvider.GetFileInfo(imageProcessing.ResizeUrl);
}
catch (Exception ex)
{
_logger.LogError("image url resize failed.", ex);
if (!options.Value.IgnoreResizeFailed)
{
throw new UrlImageResizerException(resizeRequested, "image url resize failed.", ex);
}
}
}
}
if (returnPath == imageProcessing.ResizeUrl && resizeFileInfo.Exists)
{
File.SetLastAccessTimeUtc(imageProcessing.ResizePath, DateTime.UtcNow);
}
return(returnPath);
}