/// <summary>
/// If CDN is enabled for this request, replace the outgoing media url with the cdn version
/// </summary>
/// <param name="item"></param>
/// <param name="options"></param>
/// <returns></returns>
public override string GetMediaUrl(Sitecore.Data.Items.MediaItem item, MediaUrlOptions options)
{
string hostname = CDNManager.GetCDNHostName();
string url = base.GetMediaUrl(item, options);
bool shouldReplace = !string.IsNullOrEmpty(hostname) && // cdnHostname exists for site
Sitecore.Context.PageMode.IsNormal; // PageMode is normal
bool dontReplace = !CDNManager.IsMediaPubliclyAccessible(item) || // media is publicly accessible
CDNManager.IsMediaAnalyticsTracked(item); // media is analytics tracked
CDNUrlState contextState = CDNUrlSwitcher.CurrentValue;
if (contextState == CDNUrlState.Enabled)
{
shouldReplace = true;
}
else if (contextState == CDNUrlState.Disabled)
{
UrlString url2 = new UrlString(url);
url2[CDNManager.StopToken] = "1";
url = url2.ToString();
shouldReplace = false;
}
if (shouldReplace && !dontReplace) // media not DMS tracked
{
return(CDNManager.ReplaceMediaUrl(url, hostname));
}
else
{
return(url);
}
}
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);
}
}
}