/// <summary>
/// Set the HTTP headers in the response based
/// on values from the <see cref="SetHeadersElement"/>
/// </summary>
/// <param name="context">
/// The HTTP context
/// </param>
public void SetHeaders(HttpContext context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
PipelineCapabilities caps = context.Request.Browser as PipelineCapabilities;
var flowData = caps.FlowData;
if (_setHeadersElement != null)
{
var headersToSet = flowData
.GetFromElement(_setHeadersElement).ResponseHeaderDictionary;
SetHeaders(context, headersToSet);
}
}
/// <summary>
/// Gets the <see cref="HttpBrowserCapabilities"/> object for the
/// specified <see cref="HttpRequest"/>.
/// </summary>
/// <param name="request">
/// The <see cref="HttpRequest"/> to get the browser capabilities for.
/// </param>
/// <returns>
/// The browser capabilities for the specified
/// <see cref="HttpRequest"/>.
/// </returns>
public override HttpBrowserCapabilities GetBrowserCapabilities(
HttpRequest request)
{
HttpBrowserCapabilities caps;
var baseCaps = base.GetBrowserCapabilities(request);
var flowData = WebPipeline.Process(request);
if (flowData != null)
{
// A provider is present so 51Degrees can be used to override
// some of the returned values.
caps = new PipelineCapabilities(
baseCaps,
request,
flowData);
// Copy the adapters from the original.
var adapters = baseCaps.Adapters.GetEnumerator();
while (adapters.MoveNext())
{
caps.Adapters.Add(adapters.Key, adapters.Value);
}
// Copy the browsers from the original to prevent the Browsers
// property returning null.
if (baseCaps.Browsers != null)
{
foreach (string browser in baseCaps.Browsers)
{
caps.AddBrowser(browser);
}
}
}
else
{
// No 51Degrees flow data is present so we have to use
// the base capabilities only.
caps = baseCaps;
}
return(caps);
}
/// <summary>
/// Add the JavaScript from the flow data object to the HttpResponse
/// </summary>
/// <param name="context">
/// The HttpContext containing the HttpResponse to add the
/// JavaScript to.
/// </param>
public void ServeJavascript(HttpContext context)
{
context.Response.Clear();
context.Response.ClearHeaders();
PipelineCapabilities caps = context.Request.Browser as PipelineCapabilities;
var flowData = caps.FlowData;
// Get the hash code.
var hash = flowData.GenerateKey(
flowData.Pipeline.EvidenceKeyFilter).GetHashCode();
if (hash.ToString(CultureInfo.InvariantCulture) ==
context.Request.Headers["If-None-Match"])
{
// The response hasn't changed so respond with a 304.
context.Response.StatusCode = 304;
}
else
{
var bundler = flowData.Pipeline.GetElement <JavaScriptBuilderElement>();
if (bundler != null)
{
var bundlerData = flowData.GetFromElement(bundler);
// Otherwise, return the minified script to the client.
context.Response.Write(bundlerData.JavaScript);
SetHeaders(context,
hash.ToString(CultureInfo.InvariantCulture),
bundlerData.JavaScript.Length);
}
else
{
// There is no bundler element to get the javascript from
// so the response will just be empty.
}
}
context.ApplicationInstance.CompleteRequest();
}
private static IFlowData GetFlowData(HttpContext context)
{
PipelineCapabilities caps = context.Request.Browser as PipelineCapabilities;
return(caps.FlowData);
}
