/// <summary> /// Enables processing of HTTP Web requests by a custom HttpHandler that implements the <see cref="IHttpHandler"/> interface. /// </summary> /// <param name="context">An <see cref="HttpContextBase"/> object that provides references to the intrinsic server objects (for example, Request, Response, Session, and Server) used to service HTTP requests. </param> public void ProcessRequest(HttpContextBase context) { if (context == null) { throw new ArgumentNullException("context", "context cannot be null."); } string cacheKey = this.GetCacheKey(context); HandlerOutput output = context.Cache[cacheKey] as HandlerOutput; this.PrepareResponse(context, output); if (context.Response.StatusCode == 200) { if (output == null) { try { output = new HandlerOutput() { Data = this.PerformRequest(context) ?? new byte[0], Modified = DateTime.UtcNow }; } catch (HttpException ex) { context.Response.StatusCode = ex.GetHttpCode(); } if (context.Response.StatusCode == 200) { if (BlueCollarSection.Section.Dashboard.CachingEnabled && (this.CacheModes & ResponseCacheModes.Server) == ResponseCacheModes.Server) { context.Cache.Add( cacheKey, output, null, Cache.NoAbsoluteExpiration, Cache.NoSlidingExpiration, CacheItemPriority.Low, null); } } } if (output != null && output.Data != null && output.Data.Length > 0) { context.Response.OutputStream.Write(output.Data, 0, output.Data.Length); } } }
/// <summary> /// Prepares an HTTP context's response. /// </summary> /// <param name="context">The HTTP context to prepare.</param> /// <param name="output">The cached output the response is being prepared for, if applicable.</param> protected override void PrepareResponse(HttpContextBase context, HandlerOutput output) { if (context == null) { throw new ArgumentNullException("context", "context cannot be null."); } base.PrepareResponse(context, output); if (context.Response.StatusCode == 200) { context.Response.Charset = "utf-8"; } }
/// <summary> /// Prepares an HTTP context's response. /// </summary> /// <param name="context">The HTTP context to prepare.</param> /// <param name="output">The cached output the response is being prepared for, if applicable.</param> protected override void PrepareResponse(HttpContextBase context, HandlerOutput output) { if (context == null) { throw new ArgumentNullException("context", "context cannot be null."); } base.PrepareResponse(context, output); if (context.Response.StatusCode == 200) { context.Response.Charset = "utf-8"; } }
/// <summary> /// Prepares an HTTP context's response. /// </summary> /// <param name="context">The HTTP context to prepare.</param> /// <param name="output">The cached output the response is being prepared for, if applicable.</param> protected virtual void PrepareResponse(HttpContextBase context, HandlerOutput output) { if (context == null) { throw new ArgumentNullException("context", "context cannot be null."); } context.Response.ContentType = this.ResponseContentType; context.Response.StatusCode = 200; if (BlueCollarSection.Section.Dashboard.CachingEnabled && (this.CacheModes & ResponseCacheModes.Client) == ResponseCacheModes.Client) { context.Response.Cache.SetCacheability(HttpCacheability.Public); context.Response.Cache.SetVaryByCustom("Accept-Encoding"); DateTime modifiedSince = DateTime.UtcNow; bool check304 = false; if (!string.IsNullOrEmpty(context.Request.Headers["If-Modified-Since"])) { try { modifiedSince = DateTime.Parse(context.Request.Headers["If-Modified-Since"], CultureInfo.InvariantCulture).ToUniversalTime(); check304 = true; } catch (FormatException) { context.Response.StatusCode = 400; } } if (context.Response.StatusCode == 200) { if (check304 && (output == null || output.Modified <= modifiedSince)) { context.Response.StatusCode = 304; } context.Response.Cache.SetExpires(output != null ? output.Modified.AddYears(1) : DateTime.UtcNow.AddYears(1)); context.Response.Cache.SetLastModified(output != null ? output.Modified : DateTime.UtcNow); } } else { context.Response.Cache.SetCacheability(HttpCacheability.Private); context.Response.Cache.SetMaxAge(new TimeSpan()); context.Response.Cache.SetNoServerCaching(); context.Response.Cache.SetNoStore(); } if (context.Response.StatusCode == 200 && this.ShouldCompressResponse()) { if (!string.IsNullOrEmpty(context.Request.Headers["accept-encoding"]) && (canCompressResponses == null || canCompressResponses.Value)) { string[] acceptEncodingTypes = context.Request.Headers["accept-encoding"].Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries); if (acceptEncodingTypes != null) { try { if (acceptEncodingTypes.Any(e => "GZIP".Equals(e, StringComparison.OrdinalIgnoreCase))) { context.Response.Headers.Add("Content-Encoding", "gzip"); context.Response.Filter = new GZipStream(context.Response.Filter, CompressionMode.Compress); } else if (acceptEncodingTypes.Any(e => "DEFLATE".Equals(e, StringComparison.OrdinalIgnoreCase))) { context.Response.Headers.Add("Content-Encoding", "deflate"); context.Response.Filter = new DeflateStream(context.Response.Filter, CompressionMode.Compress); } canCompressResponses = true; } catch (PlatformNotSupportedException) { // Only available on IIS7 in integrated pipeline mode. canCompressResponses = false; } } } } }
/// <summary> /// Prepares an HTTP context's response. /// </summary> /// <param name="context">The HTTP context to prepare.</param> /// <param name="output">The cached output the response is being prepared for, if applicable.</param> protected virtual void PrepareResponse(HttpContextBase context, HandlerOutput output) { if (context == null) { throw new ArgumentNullException("context", "context cannot be null."); } context.Response.ContentType = this.ResponseContentType; context.Response.StatusCode = 200; if (BlueCollarSection.Section.Dashboard.CachingEnabled && (this.CacheModes & ResponseCacheModes.Client) == ResponseCacheModes.Client) { context.Response.Cache.SetCacheability(HttpCacheability.Public); context.Response.Cache.SetVaryByCustom("Accept-Encoding"); DateTime modifiedSince = DateTime.UtcNow; bool check304 = false; if (!string.IsNullOrEmpty(context.Request.Headers["If-Modified-Since"])) { try { modifiedSince = DateTime.Parse(context.Request.Headers["If-Modified-Since"], CultureInfo.InvariantCulture).ToUniversalTime(); check304 = true; } catch (FormatException) { context.Response.StatusCode = 400; } } if (context.Response.StatusCode == 200) { if (check304 && (output == null || output.Modified <= modifiedSince)) { context.Response.StatusCode = 304; } context.Response.Cache.SetExpires(output != null ? output.Modified.AddYears(1) : DateTime.UtcNow.AddYears(1)); context.Response.Cache.SetLastModified(output != null ? output.Modified : DateTime.UtcNow); } } else { context.Response.Cache.SetCacheability(HttpCacheability.Private); context.Response.Cache.SetMaxAge(new TimeSpan()); context.Response.Cache.SetNoServerCaching(); context.Response.Cache.SetNoStore(); } if (context.Response.StatusCode == 200 && this.ShouldCompressResponse()) { if (!string.IsNullOrEmpty(context.Request.Headers["accept-encoding"]) && (canCompressResponses == null || canCompressResponses.Value)) { string[] acceptEncodingTypes = context.Request.Headers["accept-encoding"].Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries); if (acceptEncodingTypes != null) { try { if (acceptEncodingTypes.Any(e => "GZIP".Equals(e, StringComparison.OrdinalIgnoreCase))) { context.Response.Headers.Add("Content-Encoding", "gzip"); context.Response.Filter = new GZipStream(context.Response.Filter, CompressionMode.Compress); } else if (acceptEncodingTypes.Any(e => "DEFLATE".Equals(e, StringComparison.OrdinalIgnoreCase))) { context.Response.Headers.Add("Content-Encoding", "deflate"); context.Response.Filter = new DeflateStream(context.Response.Filter, CompressionMode.Compress); } canCompressResponses = true; } catch (PlatformNotSupportedException) { // Only available on IIS7 in integrated pipeline mode. canCompressResponses = false; } } } } }
/// <summary> /// Enables processing of HTTP Web requests by a custom HttpHandler that implements the <see cref="IHttpHandler"/> interface. /// </summary> /// <param name="context">An <see cref="HttpContextBase"/> object that provides references to the intrinsic server objects (for example, Request, Response, Session, and Server) used to service HTTP requests. </param> public void ProcessRequest(HttpContextBase context) { if (context == null) { throw new ArgumentNullException("context", "context cannot be null."); } string cacheKey = this.GetCacheKey(context); HandlerOutput output = context.Cache[cacheKey] as HandlerOutput; this.PrepareResponse(context, output); if (context.Response.StatusCode == 200) { if (output == null) { try { output = new HandlerOutput() { Data = this.PerformRequest(context) ?? new byte[0], Modified = DateTime.UtcNow }; } catch (HttpException ex) { context.Response.StatusCode = ex.GetHttpCode(); } if (context.Response.StatusCode == 200) { if (BlueCollarSection.Section.Dashboard.CachingEnabled && (this.CacheModes & ResponseCacheModes.Server) == ResponseCacheModes.Server) { context.Cache.Add( cacheKey, output, null, Cache.NoAbsoluteExpiration, Cache.NoSlidingExpiration, CacheItemPriority.Low, null); } } } if (output != null && output.Data != null && output.Data.Length > 0) { context.Response.OutputStream.Write(output.Data, 0, output.Data.Length); } } }