/// <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);
}
}
}
