private static Func <Stream> ProcessAndCacheImage(ImageMediaSource src, int?maxWidth, int?maxHeight, string borders, string format)
{
// if it's already in the cache, use that file
string filename = String.Format("stream_{0}_{1}_{2}_{3}.{4}", src.GetUniqueIdentifier(), maxWidth, maxHeight, borders, format);
if (cache.Contains(filename))
{
if (src.GetFileInfo().LastModifiedTime > cache.GetLastModifiedTime(cache.GetPath(filename)))
{
cache.Invalidate(filename);
}
else
{
return(() => new FileStream(cache.GetPath(filename), FileMode.Open, FileAccess.Read, FileShare.Read));
}
}
// otherwise, resize if needed and save to cache
try
{
bool hasToResize = maxWidth.HasValue || maxHeight.HasValue;
bool hasToRecode = format != src.Extension.Substring(1);
if (!hasToResize && !hasToRecode)
{
return(() => src.Retrieve());
}
// process and save to cache
using (var stream = src.Retrieve())
{
var image = hasToResize ? ResizeImage(stream, maxWidth, maxHeight, borders) : Image.FromStream(stream);
SaveImageToFile(image, cache.GetPath(filename), format);
image.Dispose();
}
return(() => new FileStream(cache.GetPath(filename), FileMode.Open, FileAccess.Read, FileShare.Read));
}
catch (Exception ex)
{
Log.Warn(String.Format("Failed to process and cache image {0}", src.GetDebugName()), ex);
return(null);
}
}
private static Stream StreamPostprocessedImage(ImageMediaSource src, int? maxWidth, int? maxHeight, string borders, string format)
{
if (!src.Exists)
{
Log.Info("Tried to stream image from non-existing source {0}", src.GetDebugName());
WCFUtil.SetResponseCode(HttpStatusCode.NotFound);
return Stream.Null;
}
if (borders != null && (!maxWidth.HasValue || !maxHeight.HasValue))
{
Log.Error("ResizeImage() called with a borders value but width or height is null");
WCFUtil.SetResponseCode(HttpStatusCode.BadRequest);
return Stream.Null;
}
if (format == null)
format = src.Extension.Substring(1);
// return from cache if possible
string filename = String.Format("stream_{0}_{1}_{2}_{3}.{4}", src.GetUniqueIdentifier(), maxWidth, maxHeight, borders, format);
if (cache.Contains(filename))
{
if (src.GetFileInfo().LastModifiedTime > cache.GetLastModifiedTime(cache.GetPath(filename)))
{
cache.Invalidate(filename);
}
else
{
WCFUtil.AddHeader(HttpResponseHeader.CacheControl, "public, max-age=5184000, s-maxage=5184000"); // not really sure why 2 months exactly
WCFUtil.SetContentType(GetMime(Path.GetExtension(filename)));
return new FileStream(cache.GetPath(filename), FileMode.Open, FileAccess.Read, FileShare.Read);
}
}
try
{
bool hasToResize = maxWidth.HasValue || maxHeight.HasValue;
bool hasToRecode = format != src.Extension.Substring(1);
if (!hasToResize && !hasToRecode)
{
WCFUtil.AddHeader(HttpResponseHeader.CacheControl, "public, max-age=5184000, s-maxage=5184000");
WCFUtil.SetContentType(GetMime(src.Extension));
return src.Retrieve();
}
// save image to cache
string path = cache.GetPath(String.Format("stream_{0}_{1}_{2}_{3}.{4}", src.GetUniqueIdentifier(), maxWidth, maxHeight, borders, format));
using (var stream = src.Retrieve())
{
var image = hasToResize ? ResizeImage(stream, maxWidth, maxHeight, borders) : Image.FromStream(stream);
SaveImageToFile(image, path, format);
image.Dispose();
}
// return image to client
WCFUtil.AddHeader(HttpResponseHeader.CacheControl, "public, max-age=5184000, s-maxage=5184000");
WCFUtil.SetContentType(GetCodecInfo(format).MimeType);
return new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);
}
catch (Exception ex)
{
Log.Warn(String.Format("Failed to post-process and stream image {0}", src.GetDebugName()), ex);
return Stream.Null;
}
}
private static Stream StreamPostprocessedImage(ImageMediaSource src, int?maxWidth, int?maxHeight, string borders, string format)
{
if (!src.Exists)
{
Log.Info("Tried to stream image from non-existing source {0}", src.GetDebugName());
WCFUtil.SetResponseCode(HttpStatusCode.NotFound);
return(Stream.Null);
}
if (borders != null && (!maxWidth.HasValue || !maxHeight.HasValue))
{
Log.Error("ResizeImage() called with a borders value but width or height is null");
WCFUtil.SetResponseCode(HttpStatusCode.BadRequest);
return(Stream.Null);
}
if (format == null)
{
format = src.Extension.Substring(1);
}
// return from cache if possible
string filename = String.Format("stream_{0}_{1}_{2}_{3}.{4}", src.GetUniqueIdentifier(), maxWidth, maxHeight, borders, format);
if (cache.Contains(filename))
{
if (src.GetFileInfo().LastModifiedTime > cache.GetLastModifiedTime(cache.GetPath(filename)))
{
cache.Invalidate(filename);
}
else
{
WCFUtil.AddHeader(HttpResponseHeader.CacheControl, "public, max-age=5184000, s-maxage=5184000"); // not really sure why 2 months exactly
WCFUtil.SetContentType(GetMime(Path.GetExtension(filename)));
return(new FileStream(cache.GetPath(filename), FileMode.Open, FileAccess.Read, FileShare.Read));
}
}
try
{
bool hasToResize = maxWidth.HasValue || maxHeight.HasValue;
bool hasToRecode = format != src.Extension.Substring(1);
if (!hasToResize && !hasToRecode)
{
WCFUtil.AddHeader(HttpResponseHeader.CacheControl, "public, max-age=5184000, s-maxage=5184000");
WCFUtil.SetContentType(GetMime(src.Extension));
return(src.Retrieve());
}
// save image to cache
string path = cache.GetPath(String.Format("stream_{0}_{1}_{2}_{3}.{4}", src.GetUniqueIdentifier(), maxWidth, maxHeight, borders, format));
using (var stream = src.Retrieve())
{
var image = hasToResize ? ResizeImage(stream, maxWidth, maxHeight, borders) : Image.FromStream(stream);
SaveImageToFile(image, path, format);
image.Dispose();
}
// return image to client
WCFUtil.AddHeader(HttpResponseHeader.CacheControl, "public, max-age=5184000, s-maxage=5184000");
WCFUtil.SetContentType(GetCodecInfo(format).MimeType);
return(new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read));
}
catch (Exception ex)
{
Log.Warn(String.Format("Failed to post-process and stream image {0}", src.GetDebugName()), ex);
return(Stream.Null);
}
}
private static Func<Stream> ProcessAndCacheImage(ImageMediaSource src, int? maxWidth, int? maxHeight, string borders, string format)
{
// if it's already in the cache, use that file
string filename = String.Format("stream_{0}_{1}_{2}_{3}.{4}", src.GetUniqueIdentifier(), maxWidth, maxHeight, borders, format);
if (cache.Contains(filename))
{
if (src.GetFileInfo().LastModifiedTime > cache.GetLastModifiedTime(cache.GetPath(filename)))
{
cache.Invalidate(filename);
}
else
{
return () => new FileStream(cache.GetPath(filename), FileMode.Open, FileAccess.Read, FileShare.Read);
}
}
// otherwise, resize if needed and save to cache
try
{
bool hasToResize = maxWidth.HasValue || maxHeight.HasValue;
bool hasToRecode = format != src.Extension.Substring(1);
if (!hasToResize && !hasToRecode)
return () => src.Retrieve();
// process and save to cache
using (var stream = src.Retrieve())
{
var image = hasToResize ? ResizeImage(stream, maxWidth, maxHeight, borders) : Image.FromStream(stream);
SaveImageToFile(image, cache.GetPath(filename), format);
image.Dispose();
}
return () => new FileStream(cache.GetPath(filename), FileMode.Open, FileAccess.Read, FileShare.Read);
}
catch (Exception ex)
{
Log.Warn(String.Format("Failed to process and cache image {0}", src.GetDebugName()), ex);
return null;
}
}
