private dynamic ResizeImage(dynamic arg)
{
var file = Path.Combine(this.RootPath, (string)arg.path);
if (File.Exists(file) == false)
{
return(404);
}
if (this.Request.Url.Query == string.Empty)
{
return(400);
}
var parameter = new ImageResizeModule.ImageFiltrationParameters(this.Context, file);
var parameterKey = parameter.GetHashCode().ToString();
var key = file + parameterKey;
string resizeRelativePath;
if (_FileList.TryGetValue(key, out resizeRelativePath) == true)
{
return(this.Response.AsRedirect(resizeRelativePath, Nancy.Responses.RedirectResponse.RedirectType.Permanent));
}
resizeRelativePath = "site/imageresize/" + (string)arg.path + "/" + parameterKey + Path.GetExtension(file);
var rootPath = this.RootPath;
var resizeDirectory = Path.Combine(rootPath, "Site", "imageresize", (string)arg.path);
Directory.CreateDirectory(resizeDirectory);
var resizeFile = Path.Combine(rootPath, resizeRelativePath);
lock (resizeFile)
{
if (File.Exists(resizeFile) == true)
{
_FileList[key] = "/" + resizeRelativePath;
return(this.Response.AsRedirect("/" + resizeRelativePath, Nancy.Responses.RedirectResponse.RedirectType.Permanent));
}
if (Directory.GetFiles(resizeDirectory).Length + 1 > MAX_PER_FILE)
{
return(400);
}
var result = ImageResizeModule.ResizeAndFilterImage(file, parameter);
using (var resized = File.OpenWrite(resizeFile))
{
result.Output.CopyTo(resized);
}
_FileList[key] = "/" + resizeRelativePath;
return(this.Response.AsRedirect("/" + resizeRelativePath, Nancy.Responses.RedirectResponse.RedirectType.Permanent));
}
}
/// <summary>
/// Resize the image without using disk cache
/// </summary>
/// <param name="arg"></param>
/// <returns></returns>
private dynamic ResizeImage_NoCache(dynamic arg)
{
var file = Path.Combine(this.RootPath, (string)arg.path);
if (File.Exists(file) == false)
{
return(404);
}
var parameter = new ImageResizeModule.ImageFiltrationParameters(arg, file);
var parameterKey = parameter.GetHashCode().ToString();
HashSet <string> set;
if (_AttackPrevention.TryGetValue(file, out set) == false)
{
set = new HashSet <string>();
_AttackPrevention.Add(file, set);
}
// this file contains too much unique parameter request
if (set.Contains(parameterKey) == false && set.Count > MAX_PER_FILE)
{
return(404);
}
set.Add(parameterKey);
var cacheKey = file + "&&" + parameter.GetHashCode();
var result = MemoryCache.Default.Get(cacheKey) as ResizeResult;
if (result == null)
{
var resizeResult = ImageResizeModule.ResizeAndFilterImage(file, parameter);
result = resizeResult;
MemoryCache.Default.Add(cacheKey, result, DateTimeOffset.Now.AddMinutes(10));
}
var response = new Response();
response.ContentType = result.ContentType;
response.Contents = (s) =>
{
result.Output.Position = 0;
result.Output.CopyTo(s);
};
return(response);
}
