/// <summary>
/// This method prepares the HTTP body based on the browser content encoding settings.
/// </summary>
/// <param name="context">The current compile context.</param>
/// <param name="blob">The UTF-8 formatted byte array.</param>
/// <returns>Returns a ContentCompilerMessageFragmentBody object containing the prepared output binary data.</returns>
protected virtual ResourceManagerMessageFragmentBody PrepareBody(
ResourceManagerContext context, BinaryContent content, out string status)
{
DateTime? expiry = null;
string cacheControl = context.Request.Data.RequestHeaderGet("Cache-Control");
bool allowNotModified = cacheControl == null || cacheControl.ToLowerInvariant() != "no-cache";
int? expiryIns = content.CacheExpiry;
ResourceManagerMessageFragmentBody body = null;
string eTag = content.IDVersion.ToString("N").ToUpperInvariant();
string eTagValidate = context.Request.Data.RequestIfNoneMatch.Trim(new char[]{'"',' '});
if ((content.CacheOptions & ContentCacheOptions.Cacheable)>0)
expiry = DateTime.Now.AddSeconds(expiryIns.Value);
context.ContextSettings.ETagAdd(content.IDVersion, content.IDContent, expiry, content.GetType(), expiryIns);
//Next check whether we have an etag in the request, and whether it matches the content.
if (!allowNotModified || eTagValidate == "" || eTag != eTagValidate)
{
//Ok, get the body.
body = PrepareBodyOutput(context, content);
body.ETag = string.Format(@"""{0}""", eTag);
if (expiry.HasValue)
body.Expires = CH.ConvertToRFC1123DateString(expiry.Value);
status = CH.HTTPCodes.OK_200;
}
else
{
if (expiry.HasValue)
context.Request.Data.ResponseHeaderAdd("Expires", CH.ConvertToRFC1123DateString(expiry.Value));
context.Request.Data.ResponseHeaderAdd("ETag", string.Format(@"""{0}""", eTag));
status = CH.HTTPCodes.NotModified_304;
}
if (expiry.HasValue)
context.Request.Data.ResponseHeaderAdd("Cache-control", "public");
else if ((content.CacheOptions & ContentCacheOptions.VersionCheck) > 0)
context.Request.Data.ResponseHeaderAdd("Cache-control", "must-revalidate");
return body;
}
