/**
* Render the gadget into a string by performing the following steps:
*
* - Retrieve gadget specification information (GadgetSpec, MessageBundle, etc.)
*
* - Fetch any preloaded data needed to handle the request, as handled by Preloader.
*
* - Perform rewriting operations on the output content, handled by Rewriter.
*
* @param gadget The gadget for the rendering operation.
* @return The rendered gadget content
* @throws RenderingException if any issues arise that prevent rendering.
*/
public String render(Gadget gadget)
{
try
{
View view = gadget.getCurrentView();
GadgetContext context = gadget.getContext();
GadgetSpec spec = gadget.getSpec();
IPreloads preloads = preloader.preload(context, spec,
PreloaderService.PreloadPhase.HTML_RENDER);
gadget.setPreloads(preloads);
String content;
if (view.getHref() == null)
{
content = view.getContent();
}
else
{
// TODO: Add current url to GadgetContext to support transitive proxying.
UriBuilder uri = new UriBuilder(view.getHref());
uri.addQueryParameter("lang", context.getLocale().getLanguage());
uri.addQueryParameter("country", context.getLocale().getCountry());
sRequest request = new sRequest(uri.toUri())
.setIgnoreCache(context.getIgnoreCache())
.setOAuthArguments(new OAuthArguments(view))
.setAuthType(view.getAuthType())
.setSecurityToken(context.getToken())
.setContainer(context.getContainer())
.setGadget(spec.getUrl());
sResponse response = DefaultHttpCache.Instance.getResponse(request);
if (response == null || response.isStale())
{
sRequest proxyRequest = createPipelinedProxyRequest(gadget, request);
response = requestPipeline.execute(proxyRequest);
DefaultHttpCache.Instance.addResponse(request, response);
}
if (response.isError())
{
throw new RenderingException("Unable to reach remote host. HTTP status " +
response.getHttpStatusCode());
}
content = response.responseString;
}
return(rewriter.rewriteGadget(gadget, content));
}
catch (GadgetException e)
{
throw new RenderingException(e.Message, e);
}
}
/**
* Creates a set of all configuration needed to satisfy the requested feature set.
*
* Appends special configuration for gadgets.util.hasFeature and gadgets.util.getFeatureParams to
* the output js.
*
* This can't be handled via the normal configuration mechanism because it is something that
* varies per request.
*
* @param reqs The features needed to satisfy the request.
* @throws GadgetException If there is a problem with the gadget auth token
*/
private String GetLibraryConfig(Gadget gadget, ICollection <GadgetFeature> reqs)
{
GadgetContext context = gadget.getContext();
JsonObject features = containerConfig.GetJsonObject(context.getContainer(), FEATURES_KEY);
Dictionary <String, Object> config = new Dictionary <string, object>(features == null ? 2 : features.Names.Count + 2);
if (features != null)
{
// Discard what we don't care about.
foreach (GadgetFeature feature in reqs)
{
String name = feature.getName();
Object conf = features.Opt(name);
if (conf != null)
{
config.Add(name, conf);
}
}
}
// Add gadgets.util support. This is calculated dynamically based on request inputs.
ModulePrefs prefs = gadget.getSpec().getModulePrefs();
var values = prefs.getFeatures().Values;
Dictionary <String, Dictionary <String, String> > featureMap =
new Dictionary <string, Dictionary <string, string> >(values.Count);
foreach (Feature feature in values)
{
featureMap.Add(feature.getName(), feature.getParams());
}
config.Add("core.util", featureMap);
// Add authentication token config
ISecurityToken authToken = context.getToken();
if (authToken != null)
{
Dictionary <String, String> authConfig = new Dictionary <String, String>(2);
String updatedToken = authToken.getUpdatedToken();
if (updatedToken != null)
{
authConfig.Add("authToken", updatedToken);
}
String trustedJson = authToken.getTrustedJson();
if (trustedJson != null)
{
authConfig.Add("trustedJson", trustedJson);
}
config.Add("shindig.auth", authConfig);
}
return("gadgets.config.init(" + JsonConvert.ExportToString(config) + ");\n");
}
public static sRequest newHttpRequest(GadgetContext context,
RequestAuthenticationInfo authenticationInfo)
{
sRequest request = new sRequest(authenticationInfo.getHref())
.setSecurityToken(context.getToken())
.setOAuthArguments(new OAuthArguments(authenticationInfo))
.setAuthType(authenticationInfo.getAuthType())
.setContainer(context.getContainer())
.setGadget(Uri.fromJavaUri(context.getUrl()));
return request;
}
public static sRequest newHttpRequest(GadgetContext context,
RequestAuthenticationInfo authenticationInfo)
{
sRequest request = new sRequest(authenticationInfo.getHref())
.setSecurityToken(context.getToken())
.setOAuthArguments(new OAuthArguments(authenticationInfo))
.setAuthType(authenticationInfo.getAuthType())
.setContainer(context.getContainer())
.setGadget(Uri.fromJavaUri(context.getUrl()));
return(request);
}