protected override Tristate Modified(HttpContext context, Media media, MediaOptions options)
{
string header1 = context.Request.Headers[Helper.Constants.Properties.IfNoneMatchHeader];
if (!string.IsNullOrEmpty(header1) && header1 != media.MediaData.MediaId)
{
return(Tristate.True);
}
string header2 = context.Request.Headers[Helper.Constants.Properties.IfModifiedSinceHeader];
if (!string.IsNullOrEmpty(header2))
{
if (WebUtil.TryGetValueOfIfModifiedSinceHeader(context.Request, out DateTime ifModifiedSince))
{
return(MainUtil.GetTristate(!CompareDatesWithRounding(ifModifiedSince, media.MediaData.Updated, new TimeSpan(0, 0, 1))));
}
Log.Warn(string.Format(Helper.Constants.Message.ModifiedWarnMessage, (object)header2), (object)typeof(MediaRequestHandler));
}
return(Tristate.Undefined);
}
protected override Tristate Modified(HttpContext context, Sitecore.Resources.Media.Media media, MediaOptions options)
{
string str1 = context.Request.Headers["If-None-Match"];
if (!string.IsNullOrEmpty(str1) && str1 != media.MediaData.MediaId)
{
return(Tristate.True);
}
string str2 = context.Request.Headers["If-Modified-Since"];
if (!string.IsNullOrEmpty(str2))
{
DateTime result;
if (DateTime.TryParse(str2.Split(';')[0].Replace(" UTC", " GMT"), out result))
{
return(MainUtil.GetTristate(!this.CompareDatesWithRounding(result, media.MediaData.Updated, new TimeSpan(0, 0, 1))));
}
Log.Warn(string.Format("Can't parse header. The wrong value - \"If-Modified-Since: {0}\" ", (object)str2), (object)typeof(MediaRequestHandler));
}
return(Tristate.Undefined);
}
public override void Process(HttpRequestArgs args)
{
Assert.ArgumentNotNull(args, "args");
if (!CDNSettings.Enabled)
{
return;
}
bool shouldFilter = (Sitecore.Context.Item != null || CDNManager.ShouldProcessRequest(args.Url.FilePathWithQueryString)) && // if an item is resolved (this is a page request) or file ext is listed in <processRequests>
!CDNManager.ShouldExcludeProcessRequest(args.Url.FilePathWithQueryString) && // if the url is not on the excluded list
Sitecore.Context.Site != null && // and a site was resolved
Sitecore.Context.PageMode.IsNormal && // and the site is not in editing mode
!string.IsNullOrEmpty(CDNManager.GetCDNHostName()); // and the current site is not in the excluded sites list
// querystring cdn=1 to force replacement
// querystring cdn=0 to force no replacement
Tristate force = MainUtil.GetTristate(WebUtil.GetQueryString("cdn"), Tristate.Undefined);
if (force == Tristate.False)
{
shouldFilter = false;
}
else if (force == Tristate.True)
{
shouldFilter = true;
}
if (shouldFilter)
{
var response = HttpContext.Current.Response;
if (response != null)
{
// replace the default response filter stream with our replacer filter
response.Filter = new MediaUrlFilter(response.Filter);
}
}
}
