/// <summary>
/// Process a single gadget. Creates a gadget from a retrieved GadgetSpec and context object,
/// automatically performing variable substitution on the spec for use elsewhere.
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public Gadget Process(GadgetContext context)
{
Uri url = context.getUrl();
if (url == null)
{
throw new ProcessingException("Missing or malformed url parameter");
}
if (!url.Scheme.ToLower().Equals("http") && !url.Scheme.ToLower().Equals("https"))
{
throw new ProcessingException("Unsupported scheme (must be http or https).");
}
if (blacklist.isBlacklisted(context.getUrl()))
{
throw new ProcessingException("The requested gadget is unavailable");
}
try
{
GadgetSpec spec = gadgetSpecFactory.getGadgetSpec(context);
spec = substituter.substitute(context, spec);
return(new Gadget()
.setContext(context)
.setSpec(spec)
.setCurrentView(GetView(context, spec)));
}
catch (GadgetException e)
{
throw new ProcessingException(e.Message, e);
}
}
public virtual RewriterResults rewrite(sRequest request, sResponse original, MutableContent content)
{
ByteArrayOutputStream baos = new ByteArrayOutputStream((content.getContent().Length * 110) / 100);
OutputStreamWriter output = new OutputStreamWriter(baos);
String mimeType = original.getHeader("Content-Type");
if (request.RewriteMimeType != null)
{
mimeType = request.RewriteMimeType;
}
GadgetSpec spec = null;
if (request.Gadget != null)
{
spec = _specFactory.getGadgetSpec(request.Gadget.toJavaUri(), false);
}
if (rewrite(spec, request.getUri(),
content,
mimeType,
output))
{
content.setContent(Encoding.Default.GetString(baos.toByteArray()));
return(RewriterResults.cacheableIndefinitely());
}
return(null);
}
private GadgetSpec findSpec(ISecurityToken securityToken, OAuthArguments arguments, OAuthResponseParams responseParams)
{
try
{
return(specFactory.getGadgetSpec(new Uri(securityToken.getAppUrl()),
arguments.getBypassSpecCache()));
}
catch (UriFormatException e)
{
throw responseParams.oauthRequestException(OAuthError.UNKNOWN_PROBLEM,
"Could not fetch gadget spec, gadget URI invalid.", e);
}
catch (GadgetException e)
{
throw responseParams.oauthRequestException(OAuthError.UNKNOWN_PROBLEM,
"Could not fetch gadget spec", e);
}
}
public ContentRewriterFeature get(sRequest request)
{
Uri gadgetUri = request.Gadget;
GadgetSpec spec;
if (gadgetUri != null)
{
URI gadgetJavaUri = gadgetUri.toJavaUri();
try
{
spec = specFactory.getGadgetSpec(gadgetJavaUri, false);
if (spec != null)
{
return(get(spec));
}
}
catch (GadgetException)
{
return(defaultFeature);
}
}
return(defaultFeature);
}