public DynamicMediaHandler()
{
var storageRoot = new DirectoryInfo( HttpContext.Current.Server.MapPath( ConfigurationManager.AppSettings[ "StorageRoot" ] ) );
var cacheRoot = new DirectoryInfo( HttpContext.Current.Server.MapPath(ConfigurationManager.AppSettings["CacheRoot"]));
var etagCalculator = new WeakFileInfoETagCalculator();
m_mediaCache = new FileSystemMediaCache(etagCalculator, cacheRoot);
//m_mediaCache = new NullMediaCache();
m_storageBackend = new FileSystemStorageBackend( storageRoot, etagCalculator );
m_mediaTransformerFactory = new CompositeMediaTransformerFactory(
new XmlExifImageInfoMediaTransformer(),
new JsonExifImageInfoMediaTransformer(),
new ImageMediaTransformerFactory(),
new CssLessMediaTransformerFactory(),
new CombineCssMediaTransformerFactory(),
new EmbedAsBase64CssMediaTransformerFactory(),
new CssMinifyingMediaTransformerFactory(),
new JavascriptMinifyingMediaTransformerFactory(),
new MarkdownMediaTransformerFactory()
);
m_formatInfoProvider = new FormatInfoProvider( (FormatInfoResolverConfiguration) ConfigurationManager.GetSection( "dynamicMediaFormatMappings" ) );
//m_formatInfoProvider = new RegistryFormatInfoProvider(null);
}
public bool TryGetContentType(IFormatInfo originalFormat, HttpRequestBase request, IFormatInfoProvider formatInfoProvider, out IFormatInfo transformedFormat, out BitmapEncoder encoder)
{
var format = request.QueryString["format"];
if (string.IsNullOrEmpty(format))
{
format = originalFormat.Extension.Substring(1);
}
switch (format.ToLower())
{
case "jpg":
int quality;
if (!int.TryParse(request.QueryString["quality"], out quality) || quality <= 0 || quality > 100)
{
quality = 80;
}
transformedFormat = formatInfoProvider.ResolveFromExtension(".jpg");
encoder = new JpegBitmapEncoder { QualityLevel = quality };
return transformedFormat != null;
case "png":
transformedFormat = formatInfoProvider.ResolveFromExtension(".png");
encoder = new PngBitmapEncoder();
return transformedFormat != null;
default:
transformedFormat = null;
encoder = null;
return false;
}
}
public DynamicMediaHandler()
{
var storageRoot = new DirectoryInfo(HttpContext.Current.Server.MapPath(ConfigurationManager.AppSettings["StorageRoot"]));
var cacheRoot = new DirectoryInfo(HttpContext.Current.Server.MapPath(ConfigurationManager.AppSettings["CacheRoot"]));
var etagCalculator = new WeakFileInfoETagCalculator();
m_mediaCache = new FileSystemMediaCache(etagCalculator, cacheRoot);
//m_mediaCache = new NullMediaCache();
m_storageBackend = new FileSystemStorageBackend(storageRoot, etagCalculator);
m_mediaTransformerFactory = new CompositeMediaTransformerFactory(
new XmlExifImageInfoMediaTransformer(),
new JsonExifImageInfoMediaTransformer(),
new ImageMediaTransformerFactory(),
new CssLessMediaTransformerFactory(),
new CombineCssMediaTransformerFactory(),
new EmbedAsBase64CssMediaTransformerFactory(),
new CssMinifyingMediaTransformerFactory(),
new JavascriptMinifyingMediaTransformerFactory(),
new MarkdownMediaTransformerFactory()
);
m_formatInfoProvider = new FormatInfoProvider((FormatInfoResolverConfiguration)ConfigurationManager.GetSection("dynamicMediaFormatMappings"));
//m_formatInfoProvider = new RegistryFormatInfoProvider(null);
}
public bool TryCreateTransformer(HttpRequestBase request, IFormatInfo originalFormat, IFormatInfoProvider formatInfoProvider, out IMediaTransformer mediaTransformer)
{
var compositeTransformer = new CompositeMediaTransformer();
var factories = _transformerFactories.ToList();
AddTransformerToComposite(request, originalFormat, compositeTransformer, factories, formatInfoProvider);
mediaTransformer = compositeTransformer;
return compositeTransformer.Count > 0;
}
protected override bool TryGetOutputFormat(HttpRequestBase request, IFormatInfo originalFormat, IFormatInfoProvider formatInfoProvider, out IFormatInfo outputFormat)
{
var format = request.QueryString["format"];
if (string.Equals(format, "exif-xml", StringComparison.InvariantCultureIgnoreCase))
{
outputFormat = formatInfoProvider.ResolveFromExtension(".xml");
return outputFormat != null;
}
outputFormat = null;
return false;
}
private static void AddTransformerToComposite(HttpRequestBase request, IFormatInfo originalFormat, CompositeMediaTransformer compositeTransformer, List<IMediaTransformerFactory> factories, IFormatInfoProvider formatInfoProvider)
{
foreach (var transformerFactory in factories)
{
IMediaTransformer transformer;
if (transformerFactory.TryCreateTransformer(request, originalFormat, formatInfoProvider, out transformer))
{
compositeTransformer.AddMediaTransformer(transformer);
factories.Remove(transformerFactory);
AddTransformerToComposite( request, transformer.OutputFormat, compositeTransformer, factories, formatInfoProvider);
return;
}
}
}
public bool TryCreateTransformer(HttpRequestBase request, IFormatInfo originalFormat, IFormatInfoProvider formatInfoProvider, out IMediaTransformer mediaTransformer)
{
var transforms = GetBitmapTransforms(request.QueryString).ToArray();
if (!transforms.Any())
{
mediaTransformer = null;
return false;
}
IFormatInfo outputFormat;
BitmapEncoder encoder;
if (!TryGetContentType(originalFormat, request, formatInfoProvider, out outputFormat, out encoder))
{
mediaTransformer = null;
return false;
}
mediaTransformer = new ImageMediaTransformer(transforms, encoder, outputFormat);
return true;
}
public bool TryCreateTransformer(HttpRequestBase request, IFormatInfo originalFormat, IFormatInfoProvider formatInfoProvider, out IMediaTransformer mediaTransformer)
{
if (!CanHandleFormat(originalFormat))
{
mediaTransformer = null;
return false;
}
if(!IsValidFilePath(request.Url.AbsolutePath))
{
mediaTransformer = null;
return false;
}
IFormatInfo outputFormat;
if( !TryGetOutputFormat(request, originalFormat, formatInfoProvider, out outputFormat) )
{
mediaTransformer = null;
return false;
}
mediaTransformer = new MediaTransformer(outputFormat, this);
return true;
}
public bool TryCreateTransformer(HttpRequestBase request, IFormatInfo originalFormat, IFormatInfoProvider formatInfoProvider, out IMediaTransformer mediaTransformer)
{
if (!CanHandleFormat(originalFormat))
{
mediaTransformer = null;
return(false);
}
if (!IsValidFilePath(request.Url.AbsolutePath))
{
mediaTransformer = null;
return(false);
}
IFormatInfo outputFormat;
if (!TryGetOutputFormat(request, originalFormat, formatInfoProvider, out outputFormat))
{
mediaTransformer = null;
return(false);
}
mediaTransformer = new MediaTransformer(outputFormat, this);
return(true);
}
protected virtual bool TryGetOutputFormat(HttpRequestBase request, IFormatInfo originalFormat, IFormatInfoProvider formatInfoProvider, out IFormatInfo outputFormat)
{
outputFormat = originalFormat;
return(true);
}
public bool TryGetContentType(IFormatInfo originalFormat, HttpRequestBase request, IFormatInfoProvider formatInfoProvider, out IFormatInfo transformedFormat, out BitmapEncoder encoder)
{
var format = request.QueryString["format"];
if (string.IsNullOrEmpty(format))
{
format = originalFormat.Extension.Substring(1);
}
switch (format.ToLower())
{
case "jpg":
int quality;
if (!int.TryParse(request.QueryString["quality"], out quality) || quality <= 0 || quality > 100)
{
quality = 80;
}
transformedFormat = formatInfoProvider.ResolveFromExtension(".jpg");
encoder = new JpegBitmapEncoder {
QualityLevel = quality
};
return(transformedFormat != null);
case "png":
transformedFormat = formatInfoProvider.ResolveFromExtension(".png");
encoder = new PngBitmapEncoder();
return(transformedFormat != null);
default:
transformedFormat = null;
encoder = null;
return(false);
}
}
public bool TryCreateTransformer(HttpRequestBase request, IFormatInfo originalFormat, IFormatInfoProvider formatInfoProvider, out IMediaTransformer mediaTransformer)
{
var transforms = GetBitmapTransforms(request.QueryString).ToArray();
if (!transforms.Any())
{
mediaTransformer = null;
return(false);
}
IFormatInfo outputFormat;
BitmapEncoder encoder;
if (!TryGetContentType(originalFormat, request, formatInfoProvider, out outputFormat, out encoder))
{
mediaTransformer = null;
return(false);
}
mediaTransformer = new ImageMediaTransformer(transforms, encoder, outputFormat);
return(true);
}
protected virtual bool TryGetOutputFormat(HttpRequestBase request, IFormatInfo originalFormat, IFormatInfoProvider formatInfoProvider, out IFormatInfo outputFormat)
{
outputFormat = originalFormat;
return true;
}
protected override bool TryGetOutputFormat(HttpRequestBase request, IFormatInfo originalFormat, IFormatInfoProvider formatInfoProvider, out IFormatInfo outputFormat)
{
var format = request.QueryString["format"];
if (string.Equals(format, "exif-json", StringComparison.InvariantCultureIgnoreCase))
{
outputFormat = formatInfoProvider.ResolveFromExtension(".json");
return(outputFormat != null);
}
outputFormat = null;
return(false);
}
private static void AddTransformerToComposite(HttpRequestBase request, IFormatInfo originalFormat, CompositeMediaTransformer compositeTransformer, List <IMediaTransformerFactory> factories, IFormatInfoProvider formatInfoProvider)
{
foreach (var transformerFactory in factories)
{
IMediaTransformer transformer;
if (transformerFactory.TryCreateTransformer(request, originalFormat, formatInfoProvider, out transformer))
{
compositeTransformer.AddMediaTransformer(transformer);
factories.Remove(transformerFactory);
AddTransformerToComposite(request, transformer.OutputFormat, compositeTransformer, factories, formatInfoProvider);
return;
}
}
}
public bool TryCreateTransformer(HttpRequestBase request, IFormatInfo originalFormat, IFormatInfoProvider formatInfoProvider, out IMediaTransformer mediaTransformer)
{
var compositeTransformer = new CompositeMediaTransformer();
var factories = _transformerFactories.ToList();
AddTransformerToComposite(request, originalFormat, compositeTransformer, factories, formatInfoProvider);
mediaTransformer = compositeTransformer;
return(compositeTransformer.Count > 0);
}
