public void Index(string resourceName)
{
HttpRequest req = System.Web.HttpContext.Current.Request;
HttpResponse resp = System.Web.HttpContext.Current.Response;
// If an If-Modified-Since header is ever provided, we always say
// not modified. This is because when there actually is a change,
// cache busting should occur.
if (req.Params["If-Modified-Since"] != null &&
req.Params["v"] != null)
{
resp.StatusCode = 304;
return;
}
if (resourceName.EndsWith(".js"))
{
// Lop off the suffix for lookup purposes
resourceName = resourceName.Substring(0, resourceName.Length - ".js".Length);
}
HashKey <string> needed = new HashKey <string>();
if (resourceName.Contains("__"))
{
foreach (string item in resourceName.Split(new[] { '_' }, StringSplitOptions.RemoveEmptyEntries))
{
needed.Add(item);
}
}
else
{
needed.Add(resourceName);
}
String debugStr = req.Params["debug"];
String container = req.Params["container"];
String containerStr = req.Params["c"];
bool debug = "1".Equals(debugStr);
if (container == null)
{
container = ContainerConfig.DEFAULT_CONTAINER;
}
RenderingContext rcontext = "1".Equals(containerStr) ?
RenderingContext.CONTAINER : RenderingContext.GADGET;
ICollection <GadgetFeature> features = registry.GetFeatures(needed);
StringBuilder jsData = new StringBuilder();
foreach (GadgetFeature feature in features)
{
foreach (JsLibrary lib in feature.getJsLibraries(rcontext, container))
{
if (!lib._Type.Equals(JsLibrary.Type.URL))
{
if (debug)
{
jsData.Append(lib.DebugContent);
}
else
{
jsData.Append(lib.Content);
}
jsData.Append(";\n");
}
}
}
if (jsData.Length == 0)
{
resp.StatusCode = (int)HttpStatusCode.NotFound;
return;
}
if (req.Params["v"] != null)
{
// Versioned files get cached indefinitely
HttpUtil.SetCachingHeaders(resp);
}
else
{
// Unversioned files get cached for 1 hour.
HttpUtil.SetCachingHeaders(resp, 60 * 60);
}
resp.ContentType = "text/javascript; charset=utf-8";
resp.ContentEncoding = Encoding.UTF8;
resp.Output.Write(jsData.ToString());
}
/// <summary>
/// Injects javascript libraries needed to satisfy feature dependencies.
/// </summary>
/// <param name="gadget"></param>
/// <param name="headTag"></param>
private void InjectFeatureLibraries(Gadget gadget, Node headTag)
{
// TODO: If there isn't any js in the document, we can skip this. Unfortunately, that means
// both script tags (easy to detect) and event handlers (much more complex).
GadgetContext context = gadget.getContext();
GadgetSpec spec = gadget.getSpec();
String forcedLibs = context.getParameter("libs");
HashKey <String> forced;
if (string.IsNullOrEmpty(forcedLibs))
{
forced = new HashKey <string>();
}
else
{
forced = new HashKey <string>();
foreach (var item in forcedLibs.Split(':'))
{
forced.Add(item);
}
}
// Forced libs are always done first.
if (forced.Count != 0)
{
String jsUrl = urlGenerator.getBundledJsUrl(forced, context);
Element libsTag = headTag.getOwnerDocument().createElement("script");
libsTag.setAttribute("src", jsUrl);
headTag.appendChild(libsTag);
// Forced transitive deps need to be added as well so that they don't get pulled in twice.
// TODO: Figure out a clean way to avoid having to call getFeatures twice.
foreach (GadgetFeature dep in featureRegistry.GetFeatures(forced))
{
forced.Add(dep.getName());
}
}
// Inline any libs that weren't forced. The ugly context switch between inline and external
// Js is needed to allow both inline and external scripts declared in feature.xml.
String container = context.getContainer();
ICollection <GadgetFeature> features = GetFeatures(spec, forced);
// Precalculate the maximum length in order to avoid excessive garbage generation.
int size = 0;
foreach (GadgetFeature feature in features)
{
foreach (JsLibrary library in feature.getJsLibraries(RenderingContext.GADGET, container))
{
if (library._Type == JsLibrary.Type.URL)
{
size += library.Content.Length;
}
}
}
// Really inexact.
StringBuilder inlineJs = new StringBuilder(size);
foreach (GadgetFeature feature in features)
{
foreach (JsLibrary library in feature.getJsLibraries(RenderingContext.GADGET, container))
{
if (library._Type == JsLibrary.Type.URL)
{
if (inlineJs.Length > 0)
{
Element inlineTag = headTag.getOwnerDocument().createElement("script");
headTag.appendChild(inlineTag);
inlineTag.appendChild(headTag.getOwnerDocument().createTextNode(inlineJs.ToString()));
inlineJs.Length = 0;
}
Element referenceTag = headTag.getOwnerDocument().createElement("script");
referenceTag.setAttribute("src", library.Content);
headTag.appendChild(referenceTag);
}
else
{
if (!forced.Contains(feature.getName()))
{
// already pulled this file in from the shared contents.
if (context.getDebug())
{
inlineJs.Append(library.DebugContent);
}
else
{
inlineJs.Append(library.Content);
}
inlineJs.Append(";\n");
}
}
}
}
inlineJs.Append(GetLibraryConfig(gadget, features));
if (inlineJs.Length > 0)
{
Element inlineTag = headTag.getOwnerDocument().createElement("script");
headTag.appendChild(inlineTag);
inlineTag.appendChild(headTag.getOwnerDocument().createTextNode(inlineJs.ToString()));
}
}
