public override void OnResultExecuted(ResultExecutedContext filterContext)
{
if (!_configuration.IsMinificationEnabled())
{
return;
}
IMarkupMinificationManager minificationManager =
_minificationManager ?? GetDefaultMinificationManager();
HttpContextBase context = filterContext.HttpContext;
HttpRequestBase request = context.Request;
HttpResponseBase response = context.Response;
Encoding encoding = response.ContentEncoding;
string httpMethod = request.HttpMethod;
string mediaType = response.ContentType;
string currentUrl = request.RawUrl;
if (response.Filter != null && response.StatusCode == 200 &&
minificationManager.IsSupportedHttpMethod(httpMethod) &&
minificationManager.IsSupportedMediaType(mediaType) &&
minificationManager.IsProcessablePage(currentUrl))
{
response.Filter = new MarkupMinificationFilterStream(response, _configuration,
minificationManager, currentUrl, encoding);
}
}
/// <summary>
/// Processes the response and sets a XML minification response filter
/// </summary>
/// <param name="sender">The source of the event (HTTP application)</param>
/// <param name="e">An System.EventArgs that contains no event data</param>
private void ProcessResponse(object sender, EventArgs e)
{
if (!_configuration.IsMinificationEnabled())
{
return;
}
IMarkupMinificationManager minificationManager =
_minificationManager ?? GetDefaultMinificationManager();
HttpContext context = ((HttpApplication)sender).Context;
HttpRequest request = context.Request;
HttpResponse response = context.Response;
Encoding encoding = response.ContentEncoding;
string mediaType = response.ContentType;
string currentUrl = request.RawUrl;
if (request.HttpMethod == "GET" && response.StatusCode == 200 &&
context.CurrentHandler != null &&
minificationManager.IsSupportedMediaType(mediaType) &&
minificationManager.IsProcessablePage(currentUrl))
{
response.Filter = new MarkupMinificationFilterStream(new HttpResponseWrapper(response),
_configuration, minificationManager, currentUrl, encoding);
}
}
public void Render(HtmlTextWriter writer, Action <HtmlTextWriter> renderHandler)
{
if (!DisableMinification)
{
IMarkupMinificationManager minificationManager =
_minificationManager ?? GetDefaultMinificationManager();
HttpContext context = HttpContext.Current;
HttpResponse response = context.Response;
HttpRequest request = context.Request;
using (var htmlwriter = new HtmlTextWriter(new StringWriter()))
{
renderHandler(htmlwriter);
string content = htmlwriter.InnerWriter.ToString();
bool isMinified = false;
Encoding encoding = response.ContentEncoding;
int responseSize = encoding.GetByteCount(content);
string httpMethod = request.HttpMethod;
string mediaType = response.ContentType;
string currentUrl = request.RawUrl;
if (response.StatusCode == 200 &&
_configuration.IsAllowableResponseSize(responseSize) &&
minificationManager.IsSupportedHttpMethod(httpMethod) &&
minificationManager.IsSupportedMediaType(mediaType) &&
minificationManager.IsProcessablePage(currentUrl))
{
IMarkupMinifier minifier = minificationManager.CreateMinifier();
MarkupMinificationResult minificationResult = minifier.Minify(content,
currentUrl, encoding, minificationManager.GenerateStatistics);
if (minificationResult.Errors.Count == 0)
{
if (_configuration.IsPoweredByHttpHeadersEnabled())
{
minificationManager.AppendPoweredByHttpHeader((key, value) =>
{
response.Headers[key] = value;
});
}
writer.Write(minificationResult.MinifiedContent);
isMinified = true;
}
}
if (!isMinified)
{
writer.Write(content);
}
}
}
else
{
renderHandler(writer);
}
}
private void Initialize()
{
if (_wrapperInitializedFlag.Set())
{
HttpRequest request = _context.Request;
HttpResponse response = _context.Response;
if (response.StatusCode == 200)
{
string httpMethod = request.Method;
string contentType = response.ContentType;
string mediaType = null;
Encoding encoding = null;
if (contentType != null)
{
MediaTypeHeaderValue mediaTypeHeader;
if (MediaTypeHeaderValue.TryParse(contentType, out mediaTypeHeader))
{
mediaType = mediaTypeHeader.MediaType
#if ASPNETCORE2 || ASPNETCORE3
.Value
#endif
.ToLowerInvariant()
;
encoding = mediaTypeHeader.Encoding;
}
}
string currentUrl = request.Path.Value;
QueryString queryString = request.QueryString;
if (queryString.HasValue)
{
currentUrl += queryString.Value;
}
IHeaderDictionary responseHeaders = response.Headers;
bool isEncodedContent = responseHeaders.IsEncodedContent();
int minificationManagerCount = _minificationManagers.Count;
if (minificationManagerCount > 0)
{
for (int managerIndex = 0; managerIndex < minificationManagerCount; managerIndex++)
{
IMarkupMinificationManager minificationManager = _minificationManagers[managerIndex];
if (minificationManager.IsSupportedHttpMethod(httpMethod) &&
mediaType != null && minificationManager.IsSupportedMediaType(mediaType) &&
minificationManager.IsProcessablePage(currentUrl))
{
if (isEncodedContent)
{
throw new InvalidOperationException(
string.Format(
AspNetCommonStrings.MarkupMinificationIsNotApplicableToEncodedContent,
responseHeaders[HeaderNames.ContentEncoding]
)
);
}
_currentMinificationManager = minificationManager;
_cachedStream = new MemoryStream();
_minificationEnabled = true;
break;
}
}
}
if (_compressionManager != null && !isEncodedContent &&
_compressionManager.IsSupportedHttpMethod(httpMethod) &&
_compressionManager.IsSupportedMediaType(mediaType) &&
_compressionManager.IsProcessablePage(currentUrl))
{
string acceptEncoding = request.Headers[HeaderNames.AcceptEncoding];
ICompressor compressor = InitializeCurrentCompressor(acceptEncoding);
if (compressor != null)
{
_compressionStream = compressor.Compress(_originalStream);
_compressionEnabled = true;
}
}
_currentUrl = currentUrl;
_encoding = encoding;
}
}
}
