void Pipeline_ImageMissing(System.Web.IHttpModule sender, System.Web.HttpContext context, Configuration.IUrlEventArgs e)
{
if (!string.IsNullOrEmpty(e.QueryString["404"]))
{
//Resolve the path to virtual or app-relative for
string path = resolve404Path(e.QueryString["404"]);
//Resolve to virtual path
path = Util.PathUtils.ResolveAppRelative(path);
//Merge commands from the 404 querystring with ones from the original image.
ResizeSettings imageQuery = new ResizeSettings(e.QueryString);
imageQuery.Normalize();
imageQuery.Remove("404"); //Remove the 404 ref
ResizeSettings i404Query = new ResizeSettings(Util.PathUtils.ParseQueryString(path));
i404Query.Normalize();
//Overwrite new with old
foreach (string key in i404Query.Keys)
{
if (key != null)
{
imageQuery[key] = i404Query[key];
}
}
path = PathUtils.AddQueryString(PathUtils.RemoveQueryString(path), PathUtils.BuildQueryString(imageQuery));
//Redirect
context.Response.Redirect(path, true);
}
}
public string CreateSignedUrlWithKey(string remoteUrl, string settings, string key)
{
NameValueCollection s = new ResizeSettings(settings);
s[Base64UrlKey] = PathUtils.ToBase64U(remoteUrl);
s[HmacKey] = SignDataWithKey(s[Base64UrlKey], key);
return(remotePrefix + ".jpg.ashx" + PathUtils.BuildQueryString(s));
}
public void ApplyRewrittenPath()
{
var currentPath = context.Request.FilePath + context.Request.PathInfo;
if (this.RewrittenVirtualPath != currentPath)
{
context.RewritePath(this.RewrittenVirtualPath + PathUtils.BuildQueryString(this.RewrittenQuery)); //Apply the new querystring also, or it would be lost
}
}
protected void Page_Load(object sender, EventArgs e)
{
var psd = Config.Current.Plugins.Get <PsdComposerPlugin>();
var request = Request;
// generate png image link
const string path = "~/text.psd";
var query = new NameValueCollection {
{ "format", "png" }
};
var psdcmd = new PsdCommandBuilder(query);
psdcmd.renderer = "psdplugin";
foreach (string s in request.QueryString)
{
if (!"redraw".Equals(request.QueryString[s], StringComparison.OrdinalIgnoreCase))
{
psdcmd.SetText(s, request.QueryString[s]);
}
psdcmd.Redraw(s);
psdcmd.Show(s);
}
Encoding c = Encoding.Default;
psdcmd.SaveToQuerystring(query);
img.ImageUrl = ResolveUrl(path) + PathUtils.BuildQueryString(query);
if (psd != null)
{
//get all layers
var layers = psd.GetAllLayers(path, query);
StringBuilder sb = new StringBuilder();
foreach (IPsdLayer l in layers)
{
sb.AppendLine(l.Name);
sb.AppendLine(l.Text);
}
lit.Text = "<pre>" + sb.ToString() + "</pre>";
}
}
public string GetCacheKey(bool includeModifiedDate)
{
return(VirtualPath + PathUtils.BuildQueryString(query.Keep("width", "height", "w", "h", "maxwidth", "maxheight", "angle", "color1", "color2")));
}
public string GenerateRequestCachingKey(DateTime?modifiedData)
{
string modified = modifiedData != null && modifiedData != DateTime.MinValue && modifiedData != DateTime.MaxValue ? modifiedData.Value.Ticks.ToString(NumberFormatInfo.InvariantInfo) : "";
return(string.Format("{0}{1}|{2}", RewrittenVirtualPath, PathUtils.BuildQueryString(RewrittenQuery), modified));
}
/// <summary>
/// Returns a querystring with all the settings in this class. Querystring keys and values are URL encoded properly.
/// </summary>
/// <returns></returns>
public string ToStringEncoded()
{
return(PathUtils.BuildQueryString(this));
}
/// <summary>
/// Returns a string containing all the settings in the class, in querystring form. Use ToStringEncoded() to get a URL-safe querystring.
/// This method does not encode commas, spaces, etc.
/// </summary>
/// <returns></returns>
public override string ToString()
{
return(PathUtils.BuildQueryString(this, false));
}
/// <summary>
/// Generates a signed domain-relative URL in the form "/app/remote.jpg.ashx?width=200&urlb64=aHnSh3haSh...&hmac=913f3KJGK3hj"
/// </summary>
/// <param name="remoteUrl"></param>
/// <param name="settings"></param>
/// <returns></returns>
public string CreateSignedUrl(string remoteUrl, NameValueCollection settings)
{
settings[Base64UrlKey] = PathUtils.ToBase64U(remoteUrl);
settings[HmacKey] = SignData(settings[Base64UrlKey]);
return(remotePrefix + ".jpg.ashx" + PathUtils.BuildQueryString(settings));
}
/// <summary>
/// Generates the resized image to disk (if needed), then rewrites the request to that location.
/// Perform 404 checking before calling this method. Assumes file exists.
/// Called during PostAuthorizeRequest
/// </summary>
/// <param name="context"></param>
/// <param name="virtualPath"></param>
/// <param name="queryString"></param>
/// <param name="vf"></param>
protected virtual void HandleRequest(HttpContext context, string virtualPath, NameValueCollection queryString, IVirtualFile vf)
{
Stopwatch s = new Stopwatch();
s.Start();
ResizeSettings settings = new ResizeSettings(queryString);
bool isCaching = settings.Cache == ServerCacheMode.Always;
bool isProcessing = settings.Process == ProcessWhen.Always;
//By default, we process it if is both (a) a recognized image extension, and (b) has a resizing directive (not just 'cache').
if (settings.Process == ProcessWhen.Default)
{
//Check for resize directive by removing ('non-resizing' items from the current querystring)
NameValueCollection copy = new NameValueCollection(queryString);
copy.Remove("cache"); copy.Remove("process"); copy.Remove("useresizingpipeline"); copy.Remove("404");
copy.Remove("404.filterMode"); copy.Remove("404.except");
//If the 'copy' still has directives, and it's an image request, then let's process it.
isProcessing = conf.IsAcceptedImageType(virtualPath) && conf.HasPipelineDirective(copy);
}
//By default, we only cache it if we're processing it.
if (settings.Cache == ServerCacheMode.Default && isProcessing)
{
isCaching = true;
}
//Resolve the 'cache' setting to 'no' unless we want it cache.
if (!isCaching)
{
settings.Cache = ServerCacheMode.No;
}
//If we are neither processing nor caching, don't do anything more with the request
if (!isProcessing && !isCaching)
{
return;
}
context.Items[conf.ResponseArgsKey] = ""; //We are handling the requests
//Communicate to the MVC plugin this request should not be affected by the UrlRoutingModule.
context.Items[conf.StopRoutingKey] = true;
//Find out if we have a modified date that we can work with
bool hasModifiedDate = (vf == null) || vf is IVirtualFileWithModifiedDate;
DateTime modDate = DateTime.MinValue;
if (hasModifiedDate && vf != null)
{
modDate = ((IVirtualFileWithModifiedDate)vf).ModifiedDateUTC;
if (modDate == DateTime.MinValue || modDate == DateTime.MaxValue)
{
hasModifiedDate = false; //Skip modified date checking if the file has no modified date
}
}
IEncoder guessedEncoder = null;
//Only use an encoder to determine extension/mime-type when it's an image extension or when we've set process = always.
if (isProcessing)
{
guessedEncoder = conf.GetImageBuilder().EncoderProvider.GetEncoder(settings, virtualPath);
if (guessedEncoder == null)
{
throw new ImageProcessingException("Image Resizer: No image encoder was found for the request.");
}
}
//Determine the file extenson for the caching system to use if we aren't processing the image
//Use the exsiting one if is an image extension. If not, use "unknown".
// We don't want to suggest writing .exe or .aspx files to the cache!
string fallbackExtension = PathUtils.GetFullExtension(virtualPath).TrimStart('.');
if (!conf.IsAcceptedImageType(virtualPath))
{
fallbackExtension = "unknown";
}
//Determine the mime-type if we aren't processing the image.
string fallbackContentType = "application/octet-stream";
//Support jpeg, png, gif, bmp, tiff mime-types. Otherwise use "application/octet-stream".
//We can't set it to null - it will default to text/html
System.Drawing.Imaging.ImageFormat recognizedExtension = DefaultEncoder.GetImageFormatFromExtension(fallbackExtension);
if (recognizedExtension != null)
{
fallbackContentType = DefaultEncoder.GetContentTypeFromImageFormat(recognizedExtension);
}
//Build CacheEventArgs
ResponseArgs e = new ResponseArgs();
e.RequestKey = virtualPath + PathUtils.BuildQueryString(queryString);
e.RewrittenQuerystring = settings;
e.ResponseHeaders.ContentType = isProcessing ? guessedEncoder.MimeType : fallbackContentType;
e.SuggestedExtension = isProcessing ? guessedEncoder.Extension : fallbackExtension;
e.HasModifiedDate = hasModifiedDate;
//Add delegate for retrieving the modified date of the source file.
e.GetModifiedDateUTC = new ModifiedDateDelegate(delegate() {
if (vf == null)
{
return(System.IO.File.GetLastWriteTimeUtc(HostingEnvironment.MapPath(virtualPath)));
}
else if (hasModifiedDate)
{
return(modDate);
}
else
{
return(DateTime.MinValue); //Won't be called, no modified date available.
}
});
//A delegate for accessing the source file
e.GetSourceImage = new GetSourceImageDelegate(delegate() {
return((vf != null) ? vf.Open() : File.Open(HostingEnvironment.MapPath(virtualPath), FileMode.Open, FileAccess.Read, FileShare.Read));
});
//Add delegate for writing the data stream
e.ResizeImageToStream = new ResizeImageDelegate(delegate(System.IO.Stream stream) {
//This runs on a cache miss or cache invalid. This delegate is preventing from running in more
//than one thread at a time for the specified cache key
try {
if (!isProcessing)
{
//Just duplicate the data
using (Stream source = e.GetSourceImage())
StreamExtensions.CopyToStream(source, stream); //4KiB buffer
}
else
{
//Process the image
if (vf != null)
{
conf.GetImageBuilder().Build(vf, stream, settings);
}
else
{
conf.GetImageBuilder().Build(HostingEnvironment.MapPath(virtualPath), stream, settings); //Use a physical path to bypass virtual file system
}
}
//Catch not found exceptions
} catch (System.IO.FileNotFoundException notFound) {
//This will be called later, if at all.
FileMissing(context, virtualPath, queryString);
throw new ImageMissingException("The specified resource could not be located", "File not found", notFound);
} catch (System.IO.DirectoryNotFoundException notFound) {
FileMissing(context, virtualPath, queryString);
throw new ImageMissingException("The specified resource could not be located", "File not found", notFound);
}
});
context.Items[conf.ResponseArgsKey] = e; //store in context items
//Fire events (for client-side caching plugins)
conf.FirePreHandleImage(this, context, e);
//Pass the rest of the work off to the caching module. It will handle rewriting/redirecting and everything.
//We handle request headers based on what is found in context.Items
ICache cache = conf.GetCacheProvider().GetCachingSystem(context, e);
//Verify we have a caching system
if (cache == null)
{
throw new ImageProcessingException("Image Resizer: No caching plugin was found for the request");
}
cache.Process(context, e);
s.Stop();
context.Items["ResizingTime"] = s.ElapsedMilliseconds;
}
public string EncryptPathAndQuery(string virtualPath, NameValueCollection query)
{
return(EncryptPathAndQuery(virtualPath + PathUtils.BuildQueryString(query)));
}
public string GetCacheKey(bool includeModifiedDate)
{
return(VirtualPath + PathUtils.BuildQueryString(NameValueCollectionExtensions.Keep(query, "width", "height", "w", "h", "maxwidth", "maxheight", "angle", "color1", "color2")));
}
void Pipeline_ImageMissing(System.Web.IHttpModule sender, System.Web.HttpContext context, Configuration.IUrlEventArgs e)
{
if (!string.IsNullOrEmpty(e.QueryString["404"]))
{
//Resolve the path to virtual or app-relative for
string path = resolve404Path(e.QueryString["404"]);
//Resolve to virtual path
path = Util.PathUtils.ResolveAppRelative(path);
// Merge commands from the 404 querystring with ones from the
// original image. We start by sanitizing the querystring from
// the image.
ResizeSettings imageQuery = new ResizeSettings(e.QueryString);
imageQuery.Normalize();
// Use the configured settings by default.
var filterMode = this.filterMode;
var except = this.except;
// To support querystring-specifiable filter mode and exceptions,
// uncomment the if block below.
////// If the imageQuery includes specific 404 command-filtering,
////// (*either* of the values), use those instead of the
////// configured defaults.
////if (!string.IsNullOrEmpty(e.QueryString["404.filterMode"]) ||
//// !string.IsNullOrEmpty(e.QueryString["404.except"]))
////{
//// filterMode = NameValueCollectionExtensions.Get(e.QueryString, "404.filterMode", FilterMode.ExcludeUnknownCommands);
//// except = MatcherCollection.Parse(e.QueryString["404.except"]);
////}
// remove all of the commands we're supposed to remove... we
// clone the list of keys so that we're not modifying the collection
// while we enumerate it.
var shouldRemove = CreateRemovalMatcher(filterMode, except);
var names = new List <string>(imageQuery.AllKeys);
foreach (var name in names)
{
if (shouldRemove(name, imageQuery[name]))
{
imageQuery.Remove(name);
}
}
// Always remove the '404', '404.filterMode', and '404.except' settings.
imageQuery.Remove("404");
imageQuery.Remove("404.filterMode");
imageQuery.Remove("404.except");
ResizeSettings i404Query = new ResizeSettings(Util.PathUtils.ParseQueryString(path));
i404Query.Normalize();
//Overwrite new with old
foreach (string key in i404Query.Keys)
{
if (key != null)
{
imageQuery[key] = i404Query[key];
}
}
path = PathUtils.AddQueryString(PathUtils.RemoveQueryString(path), PathUtils.BuildQueryString(imageQuery));
//Redirect
context.Response.Redirect(path, true);
}
}
/// <summary>
/// Returns a URL-safe querystring containing the instruction set
/// </summary>
/// <returns></returns>
public string ToQueryString()
{
return(PathUtils.BuildQueryString(this, true));
}
private static string getVirtualCacheKey(string virtualPath, NameValueCollection query)
{
return("MemCachedVirtualFile:" + virtualPath.ToLowerInvariant() + PathUtils.BuildQueryString(query));
}
public static MemCachedFile GetCachedVirtualFile(string path, IVirtualImageProvider provider, NameValueCollection queryString)
{
string key = provider != null?getVirtualCacheKey(path, queryString) : getCacheKey(path);
MemCachedFile file = null;
if (HttpContext.Current != null)
{
if (HttpContext.Current.Cache[key] != null)
{
file = (MemCachedFile)HttpContext.Current.Cache[key];
}
else
{
IVirtualFile vfile = provider != null?provider.GetFile(path, queryString) : null;
if (vfile == null)
{
throw new FileNotFoundException("The specified virtual file could not be found: \"" + path + "\" Associated querystring: \"" + PathUtils.BuildQueryString(queryString) + "\".");
}
file = vfile != null ? new MemCachedFile(vfile) : new MemCachedFile(path);
if (provider == null)
{
HttpContext.Current.Cache.Insert(key, file, new CacheDependency(path));
}
else
{
HttpContext.Current.Cache.Insert(key, file);
}
}
}
else
{
//Has no invalidation, but this is only used for benchmarks. Only runs when there is no http session.
lock (_fallbackCache){
if (_fallbackCache.ContainsKey(key))
{
file = _fallbackCache[key];
}
else
{
file = provider != null ? new MemCachedFile(provider.GetFile(path, queryString)) : new MemCachedFile(path);
_fallbackCache[key] = file;
}
}
}
return(file);
}
