public void FireAuthorizeImage(System.Web.IHttpModule sender, System.Web.HttpContext context, IUrlAuthorizationEventArgs e)
{
if (AuthorizeImage != null)
{
AuthorizeImage(sender, context, e);
}
}
void Pipeline_Rewrite(System.Web.IHttpModule sender, System.Web.HttpContext context, IUrlEventArgs e)
{
var os = provider.GetOverlays(e.VirtualPath, e.QueryString);
if (os == null)
{
return;
}
long hash = 0xab224895;
int offset = 0;
foreach (Overlay o in os)
{
int ohash = o.GetDataHashCode();
string physicalPath = HostingEnvironment.MapPath(o.OverlayPath);
try{
ohash ^= (int)(File.GetLastWriteTimeUtc(physicalPath).Ticks / (TimeSpan.TicksPerMillisecond * 5));
}catch {}
hash ^= ohash << (offset % 50);
offset += 31;
}
//Store a hash of all the overlays, so the disk cache updates when an overlay changes
e.QueryString["customoverlay.hash"] = hash.ToString();
//And save the overlays for later
RequestOverlays = os;
}
public void FireImageMissing(System.Web.IHttpModule sender, System.Web.HttpContext context, IUrlEventArgs e)
{
if (ImageMissing != null)
{
ImageMissing(sender, context, e);
}
}
public void FireRewritingEvents(System.Web.IHttpModule sender, System.Web.HttpContext context, IUrlEventArgs e)
{
//TODO: this approach is non-intuitive....
//Fire first event (results will stay in e)
if (Rewrite != null)
{
Rewrite(sender, context, e);
}
//Copy querystring for use in 'defaults' even
NameValueCollection copy = new NameValueCollection(e.QueryString); //Copy so we can later overwrite q with the rewrite values.
//Fire defaults event.
if (RewriteDefaults != null)
{
RewriteDefaults(sender, context, e);
}
//Overwrite with querystring values again - this is what makes applyDefaults applyDefaults, vs. being applyOverrides.
foreach (string k in copy)
{
if (copy[k] != null) //Don't allow null values to override defaults. Empty values can, however.
{
e.QueryString[k] = copy[k];
}
}
//Fire final event
if (PostRewrite != null)
{
PostRewrite(sender, context, e);
}
}
void Pipeline_PostRewrite(System.Web.IHttpModule sender, System.Web.HttpContext context, IUrlEventArgs e)
{
if (IsRemotePath(e.VirtualPath))
{
//Force images to be processed - don't allow them to only cache it.
e.QueryString["process"] = ProcessWhen.Always.ToString().ToLowerInvariant();
}
}
public void FirePreHandleImage(System.Web.IHttpModule sender, System.Web.HttpContext context, IResponseArgs e)
{
System.Threading.Interlocked.Increment(ref processedCount);
if (PreHandleImage != null)
{
PreHandleImage(sender, context, e);
}
}
void Pipeline_PostAuthorizeRequestStart(System.Web.IHttpModule sender, System.Web.HttpContext context)
{
if (redirectThrough != null && c.Pipeline.ModifiedQueryString.Count > 0)
{
//It wasn't a cloudfront URL - it had a normal querystring
context.Items[c.Pipeline.ModifiedPathKey + ".hadquery"] = true;
}
//Transform semicolon querystrings into the normal collection
TransformCloudFrontUrl(context);
}
void Pipeline_PostAuthorizeRequestStart(System.Web.IHttpModule sender, System.Web.HttpContext context)
{
if (HandlesRequest(context, c))
{
//Communicate to the MVC plugin this request should not be affected by the UrlRoutingModule.
context.Items[c.Pipeline.StopRoutingKey] = true;
//Provide the request handler
context.RemapHandler(new EndpointPluginPageHandler(ProcessRequest));
}
}
/// <summary>
/// This is where we hijack the resizing process, interrupt it, and send back the json data we created.
/// </summary>
/// <param name="sender"></param>
/// <param name="context"></param>
/// <param name="e"></param>
void Pipeline_PreHandleImage(System.Web.IHttpModule sender, System.Web.HttpContext context, Caching.IResponseArgs e)
{
if (e.RewrittenQuerystring.Get("resizer.debug", DebugType.None) != DebugType.None)
{
InjectRequestMod(e as ResponseArgs);
if (!Diagnostic.AllowResponse(context, this.c))
{
throw GetResponseException(Diagnostic.DisabledNotice(c));
}
}
}
void Pipeline_RewriteDefaults(System.Web.IHttpModule sender, System.Web.HttpContext context, IUrlEventArgs e)
{
//Set the XXX of /remote.XXX to the real extension used by the remote file.
//Allows the output extension and mime-type default to be determined correctly
if (IsRemotePath(e.VirtualPath) &&
!string.IsNullOrEmpty(e.QueryString[Base64UrlKey]))
{
string ext = PathUtils.GetExtension(PathUtils.FromBase64UToString(e.QueryString[Base64UrlKey]));
if (!string.IsNullOrEmpty(ext) && c.Pipeline.IsAcceptedImageType("." + ext))
{
e.VirtualPath = PathUtils.SetExtension(e.VirtualPath, ext);
}
}
}
void Pipeline_PostAuthorizeRequestStart(System.Web.IHttpModule sender, System.Web.HttpContext context)
{
if ((context.Request.FilePath.EndsWith("/resizer.debug", StringComparison.OrdinalIgnoreCase) ||
context.Request.FilePath.EndsWith("/resizer.debug.ashx", StringComparison.OrdinalIgnoreCase)))
{
//Communicate to the MVC plugin this request should not be affected by the UrlRoutingModule.
context.Items[c.Pipeline.StopRoutingKey] = true;
//Provide the request handler
IHttpHandler handler = AllowResponse(context) ? (IHttpHandler) new DiagnosticPageHandler(c) : (IHttpHandler) new DiagnosticDisabledHandler(c);
context.RemapHandler(handler);
// The following line of code does nothing. I don't think there is any way to make this work before .NET 2.0 SP2
//context.Handler = handler;
}
}
void Pipeline_RewriteDefaults(System.Web.IHttpModule sender, System.Web.HttpContext context, IUrlEventArgs e)
{
///Handle redirectThrough behavior
if (redirectThrough != null && context.Items[c.Pipeline.ModifiedPathKey + ".hadquery"] != null)
{
//It had a querystring originally - which means the request didn't come from CloudFront, it came directly from the browser. Perform a redirect, rewriting the querystring appropriately
string finalPath = redirectThrough + e.VirtualPath + PathUtils.BuildSemicolonQueryString(e.QueryString, true);
//Redirect according to setting
context.Response.Redirect(finalPath, !redirectPermanent);
if (redirectPermanent)
{
context.Response.StatusCode = 301;
context.Response.End();
}
}
}
public void FirePostAuthorizeRequest(System.Web.IHttpModule sender, System.Web.HttpContext httpContext)
{
//The one-time event
if (!firstRequestFinished)
{
lock (firedFirstRequestSync) {
if (!firedFirstRequest)
{
firedFirstRequest = true;
if (OnFirstRequest != null)
{
OnFirstRequest(sender, httpContext);
}
firstRequestFinished = true;
}
}
}
//And the main event
if (PostAuthorizeRequestStart != null)
{
PostAuthorizeRequestStart(sender, httpContext);
}
}
