/// <summary>
/// Handles the BeginRequest event of the context control.
/// </summary>
/// <param name="sender">The source of the event</param>
/// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data</param>
private void PreRequestHandlerExecute(object sender, EventArgs e)
{
if (!_configuration.IsCompressionEnabled())
{
return;
}
IHttpCompressionManager compressionManager =
_compressionManager ?? HttpCompressionManager.Current;
HttpContext context = ((HttpApplication)sender).Context;
HttpRequest request = context.Request;
HttpResponse response = context.Response;
string httpMethod = request.HttpMethod;
string currentUrl = request.RawUrl;
if (compressionManager.IsSupportedHttpStatusCode(response.StatusCode) &&
compressionManager.IsSupportedHttpMethod(httpMethod) &&
compressionManager.IsProcessablePage(currentUrl) &&
!request.Path.EndsWith("WebResource.axd", StringComparison.OrdinalIgnoreCase))
{
context.Items["originalResponseFilter"] = response.Filter;
string acceptEncoding = request.Headers["Accept-Encoding"];
response.Filter = new HttpCompressionFilterStream(new HttpResponseWrapper(response),
compressionManager, acceptEncoding);
}
}
public void OnLoad(EventArgs e)
{
if (DisableCompression)
{
return;
}
IHttpCompressionManager compressionManager =
_compressionManager ?? HttpCompressionManager.Current;
HttpContext context = HttpContext.Current;
HttpRequest request = context.Request;
HttpResponse response = context.Response;
string httpMethod = request.HttpMethod;
string currentUrl = request.RawUrl;
if (compressionManager.IsSupportedHttpStatusCode(response.StatusCode) &&
compressionManager.IsSupportedHttpMethod(httpMethod) &&
compressionManager.IsProcessablePage(currentUrl))
{
context.Items["originalResponseFilter"] = response.Filter;
string acceptEncoding = request.Headers["Accept-Encoding"];
response.Filter = new HttpCompressionFilterStream(new HttpResponseWrapper(response),
compressionManager, acceptEncoding);
}
}
/// <summary>
/// Override to compress the content that is generated by an action method
/// </summary>
/// <param name="filterContext">Filter context</param>
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
if (!_configuration.IsCompressionEnabled())
{
return;
}
IHttpCompressionManager compressionManager =
_compressionManager ?? HttpCompressionManager.Current;
HttpContextBase context = filterContext.HttpContext;
HttpRequestBase request = context.Request;
HttpResponseBase response = context.Response;
string httpMethod = request.HttpMethod;
string currentUrl = request.RawUrl;
if (response.Filter != null && compressionManager.IsSupportedHttpStatusCode(response.StatusCode) &&
compressionManager.IsSupportedHttpMethod(httpMethod) &&
compressionManager.IsProcessablePage(currentUrl))
{
context.Items["originalResponseFilter"] = response.Filter;
string acceptEncoding = request.Headers["Accept-Encoding"];
response.Filter = new HttpCompressionFilterStream(response, compressionManager, acceptEncoding);
}
}
protected void Initialize()
{
if (_wrapperInitializedFlag.Set())
{
HttpRequest request = _context.Request;
HttpResponse response = _context.Response;
int httpStatusCode = response.StatusCode;
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 || ASPNETCORE5
.Value
#endif
.ToLowerInvariant()
;
encoding = mediaTypeHeader.Encoding;
}
}
string currentUrl = GetCurrentUrl(request);
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.IsSupportedHttpStatusCode(httpStatusCode) &&
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.IsSupportedHttpStatusCode(httpStatusCode) &&
_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;
}
}