// Entrypoint to the pipeline
protected virtual void ExecuteBridgePipeline()
{
// Make the calls to all other bridge methods first
BridgeMethodInfo methodInfo = GetMethodInfoForCall(BridgeRequest.Method);
foreach (BridgeChainRequestInfo callInfo in methodInfo.BridgeChainRequests)
{
Dictionary <string, object> args = new Dictionary <string, object>();
ResolveParameters(callInfo.Parameters, args, Context);
BridgeRequest request = new BridgeRequest(callInfo.Method, args);
object results = BridgeHandler.Invoke(callInfo.BridgeUrl, request);
Context.ResultsChain[callInfo.Name] = results;
}
TransformRequest();
// Stop execution if we have a cache hit
if (ResolveRequestCache())
{
return;
}
ProcessRequest();
TransformResponse();
UpdateResponseCache();
}
public virtual void ProcessRequest()
{
// Resolve the url before we make the call
// If the ServiceUrl is specified on the BridgeRequest, use that instead
string url = BridgeRequest.ServiceUrl;
if (string.IsNullOrEmpty(url))
{
url = BridgeService.ServiceInfo.ServiceUrl;
}
// Now handle expressions
if (!string.IsNullOrEmpty(url))
{
url = BridgeHandler.TryParseExpression(url, Context) as string;
if (url == null)
{
throw new ArgumentException("The expression for url must evaluate to a string object.");
}
}
// For now we special case the REST proxy
if (string.Equals(BridgeService.ServiceInfo.ServiceClass, "Microsoft.Web.Preview.Services.BridgeRestProxy"))
{
ServiceResponse.Response = BridgeRestProxy.MakeRestCall(url, ServiceRequest.Args, ServiceRequest.Credentials);
}
else
{
// This method gets code gen'ed to call the actual proxy method (see BridgeBuildProvider.cs)
ServiceResponse.Response = CallServiceClassMethod(ServiceRequest.Method, ServiceRequest.Args, ServiceRequest.Credentials, url);
}
}
public static object Invoke(string bridgeUrl, BridgeRequest request)
{
bridgeUrl = VirtualPathUtility.ToAbsolute(bridgeUrl);
Type type = BuildManager.GetCompiledType(bridgeUrl);
if (type == null || !typeof(BridgeHandler).IsAssignableFrom(type))
{
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, PreviewWeb.BridgeHandler_CannotLoad, bridgeUrl));
}
BridgeHandler bridge = Activator.CreateInstance(type) as BridgeHandler;
if (bridge == null)
{
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, PreviewWeb.BridgeHandler_CannotCreate, bridgeUrl));
}
return(bridge.Invoke(request));
}
