public static Stream GetResizedImage(ImageMediaSource src, int?maxWidth, int?maxHeight)
{
// load file
if (!src.Exists)
{
Log.Info("Requested resized image for non-existing source {0}", src.GetDebugName());
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotFound);
return(Stream.Null);
}
// create cache path
string filename = String.Format("resize_{0}_{1}_{2}.jpg", src.GetUniqueIdentifier(), maxWidth, maxHeight);
// check for existence on disk
if (!cache.Contains(filename))
{
Image orig;
using (var impersonator = src.GetImpersonator())
{
orig = Image.FromStream(src.Retrieve());
}
if (!ResizeImage(orig, cache.GetPath(filename), maxWidth, maxHeight))
{
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.InternalServerError);
return(Stream.Null);
}
}
return(StreamImage(new ImageMediaSource(cache.GetPath(filename))));
}
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);
}
}
public static bool CacheImage(ImageMediaSource src, int? maxWidth, int? maxHeight, string borders, string format)
{
if (!src.Exists)
{
Log.Info("Tried to request image from non-existing source {0}", src.GetDebugName());
return false;
}
if (borders != null && (!maxWidth.HasValue || !maxHeight.HasValue))
{
Log.Error("RequestImage() called with a borders value but width or height is null");
return false;
}
if (format == null)
format = src.Extension.Substring(1);
return ProcessAndCacheImage(src, maxWidth, maxHeight, borders, format) != 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);
}
Func <Stream> streamFactory = ProcessAndCacheImage(src, maxWidth, maxHeight, borders, format);
if (streamFactory == null)
{
return(Stream.Null);
}
try
{
// return image to client
WCFUtil.AddHeader(HttpResponseHeader.CacheControl, "public, max-age=5184000, s-maxage=5184000");
WCFUtil.SetContentType(GetMime(format));
return(streamFactory());
}
catch (Exception ex)
{
Log.Warn(String.Format("Failed to post-process and stream image {0}", src.GetDebugName()), ex);
return(Stream.Null);
}
}
public static bool CacheImage(ImageMediaSource src, int?maxWidth, int?maxHeight, string borders, string format)
{
if (!src.Exists)
{
Log.Info("Tried to request image from non-existing source {0}", src.GetDebugName());
return(false);
}
if (borders != null && (!maxWidth.HasValue || !maxHeight.HasValue))
{
Log.Error("RequestImage() called with a borders value but width or height is null");
return(false);
}
if (format == null)
{
format = src.Extension.Substring(1);
}
return(ProcessAndCacheImage(src, maxWidth, maxHeight, borders, format) != null);
}
private static Stream StreamImage(ImageMediaSource src)
{
if (!src.Exists)
{
Log.Info("Tried to stream image from non-existing source {0}", src.GetDebugName());
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotFound);
return(Stream.Null);
}
Dictionary <string, string> commonMimeTypes = new Dictionary <string, string>()
{
{ ".jpeg", "image/jpeg" },
{ ".jpg", "image/jpeg" },
{ ".png", "image/png" },
{ ".gif", "image/gif" },
{ ".bmp", "image/x-ms-bmp" },
};
string mime = commonMimeTypes.ContainsKey(src.Extension) ? commonMimeTypes[src.Extension] : "application/octet-stream";
WCFUtil.SetContentType(mime);
return(src.Retrieve());
}
public static Stream GetResizedImage(ImageMediaSource src, int?maxWidth, int?maxHeight)
{
// load file
if (!src.Exists)
{
Log.Info("Requested resized image for non-existing source {0}", src.GetDebugName());
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotFound);
return(Stream.Null);
}
// create cache path
string tmpDir = Path.Combine(Path.GetTempPath(), "MPExtended", "imagecache");
if (!Directory.Exists(tmpDir))
{
Directory.CreateDirectory(tmpDir);
}
string cachedPath = Path.Combine(tmpDir, String.Format("rs_{0}_{1}_{2}.jpg", src.GetUniqueIdentifier(), maxWidth, maxHeight));
// check for existence on disk
if (!File.Exists(cachedPath))
{
Image orig;
using (var impersonator = src.GetImpersonator())
{
orig = Image.FromStream(src.Retrieve());
}
if (!ResizeImage(orig, cachedPath, maxWidth, maxHeight))
{
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.InternalServerError);
return(Stream.Null);
}
}
return(StreamImage(new ImageMediaSource(cachedPath)));
}
public static Stream GetResizedImage(ImageMediaSource src, int? maxWidth, int? maxHeight)
{
// load file
if (!src.Exists)
{
Log.Info("Requested resized image for non-existing source {0}", src.GetDebugName());
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotFound);
return Stream.Null;
}
// create cache path
string filename = String.Format("resize_{0}_{1}_{2}.jpg", src.GetUniqueIdentifier(), maxWidth, maxHeight);
// check for existence on disk
if (!cache.Contains(filename))
{
Image orig;
using (var impersonator = src.GetImpersonator())
{
orig = Image.FromStream(src.Retrieve());
}
if (!ResizeImage(orig, cache.GetPath(filename), ImageFormat.Jpeg, maxWidth, maxHeight))
{
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.InternalServerError);
return Stream.Null;
}
}
return StreamImage(new ImageMediaSource(cache.GetPath(filename)));
}
public static Stream GetResizedImage(ImageMediaSource src, int?maxWidth, int?maxHeight, string borders, string format)
{
return(StreamPostprocessedImage(src, maxWidth, maxHeight, borders, format));
}
public static Stream GetImage(ImageMediaSource src, string format)
{
return(StreamPostprocessedImage(src, null, null, null, format));
}
public static Stream GetImage(ImageMediaSource source)
{
return(StreamImage(source));
}
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);
Func<Stream> streamFactory = ProcessAndCacheImage(src, maxWidth, maxHeight, borders, format);
if (streamFactory == null)
return Stream.Null;
try
{
// return image to client
WCFUtil.AddHeader(HttpResponseHeader.CacheControl, "public, max-age=5184000, s-maxage=5184000");
WCFUtil.SetContentType(GetMime(format));
return streamFactory();
}
catch (Exception ex)
{
Log.Warn(String.Format("Failed to post-process and stream image {0}", src.GetDebugName()), ex);
return Stream.Null;
}
}
public static Stream GetResizedImage(ImageMediaSource src, int? maxWidth, int? maxHeight)
{
// load file
if (!src.Exists)
{
Log.Info("Requested resized image for non-existing source {0}", src.GetDebugName());
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotFound);
return Stream.Null;
}
// create cache path
string tmpDir = Path.Combine(Path.GetTempPath(), "MPExtended", "imagecache");
if (!Directory.Exists(tmpDir))
Directory.CreateDirectory(tmpDir);
string cachedPath = Path.Combine(tmpDir, String.Format("rs_{0}_{1}_{2}.jpg", src.GetUniqueIdentifier(), maxWidth, maxHeight));
// check for existence on disk
if (!File.Exists(cachedPath))
{
Image orig;
using (var impersonator = src.GetImpersonator())
{
orig = Image.FromStream(src.Retrieve());
}
if (!ResizeImage(orig, cachedPath, maxWidth, maxHeight))
{
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.InternalServerError);
return Stream.Null;
}
}
return StreamImage(new ImageMediaSource(cachedPath));
}
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;
}
}
public static Stream GetResizedImage(ImageMediaSource src, int? maxWidth, int? maxHeight, string borders, string format)
{
return StreamPostprocessedImage(src, maxWidth, maxHeight, borders, format);
}
public static Stream GetImage(ImageMediaSource src, string format)
{
return StreamPostprocessedImage(src, null, null, null, format);
}
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 broders 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))
{
WCFUtil.SetContentType(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.SetContentType(GetMime(src.Extension));
return src.Retrieve();
}
var image = hasToResize ? ResizeImage(src, maxWidth, maxHeight, borders) : Image.FromStream(src.Retrieve());
string path = cache.GetPath(String.Format("stream_{0}_{1}_{2}_{3}.{4}", src.GetUniqueIdentifier(), maxWidth, maxHeight, borders, format));
SaveImageToFile(image, path, format);
image.Dispose();
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 Image ResizeImage(ImageMediaSource src, int? maxWidth, int? maxHeight, string borders)
{
using (var origImage = Image.FromStream(src.Retrieve()))
{
Resolution newSize = Resolution.Calculate(origImage.Width, origImage.Height, maxWidth, maxHeight, 1);
int bitmapWidth = !String.IsNullOrEmpty(borders) ? maxWidth.Value : newSize.Width;
int bitmapHeight = !String.IsNullOrEmpty(borders) ? maxHeight.Value : newSize.Height;
Bitmap newImage = new Bitmap(bitmapWidth, bitmapHeight, PixelFormat.Format32bppArgb);
using (Graphics graphic = Graphics.FromImage(newImage))
{
graphic.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphic.SmoothingMode = SmoothingMode.HighQuality;
graphic.CompositingQuality = CompositingQuality.HighQuality;
graphic.CompositingMode = CompositingMode.SourceCopy;
graphic.PixelOffsetMode = PixelOffsetMode.HighQuality;
if (!String.IsNullOrEmpty(borders))
graphic.FillRectangle(new SolidBrush(ColorTranslator.FromHtml("#" + borders)), 0, 0, bitmapWidth, bitmapHeight);
int leftOffset = !String.IsNullOrEmpty(borders) ? (maxWidth.Value - newSize.Width) / 2 : 0;
int heightOffset = !String.IsNullOrEmpty(borders) ? (maxHeight.Value - newSize.Height) / 2 : 0;
graphic.DrawImage(origImage, leftOffset, heightOffset, newSize.Width, newSize.Height);
}
return newImage;
}
}
public static Stream GetImage(ImageMediaSource source)
{
return StreamImage(source);
}
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 StreamImage(ImageMediaSource src)
{
if (!src.Exists)
{
Log.Info("Tried to stream image from non-existing source {0}", src.GetDebugName());
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotFound);
return Stream.Null;
}
Dictionary<string, string> commonMimeTypes = new Dictionary<string, string>() {
{ ".jpeg", "image/jpeg" },
{ ".jpg", "image/jpeg" },
{ ".png", "image/png" },
{ ".gif", "image/gif" },
{ ".bmp", "image/x-ms-bmp" },
};
string mime = commonMimeTypes.ContainsKey(src.Extension) ? commonMimeTypes[src.Extension] : "application/octet-stream";
WebOperationContext.Current.OutgoingResponse.ContentType = mime;
return src.Retrieve();
}
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;
}
}
