Making all binding data available on context (e.g. DequeueCount, InsertionTime, etc.)

Author: mathewc

sample/QueueTrigger/index.js

@@ -1,5 +1,9 @@
 module.exports = function (context, workItem) {
     context.log('Node.js queue trigger function processed work item ' + workItem.id);
+
+    context.log('DequeueCount=' + context.bindingData.DequeueCount);
+    context.log('InsertionTime=' + context.bindingData.InsertionTime);
+
     context.done(null, {
         receipt: workItem
     });

src/WebJobs.Script/Description/NodeFunctionInvoker.cs

@@ -101,6 +101,7 @@ public override async Task Invoke(object[] parameters)
 
                 Dictionary<string, string> bindingData = GetBindingData(input, binder, _inputBindings, _outputBindings);
                 bindingData["InvocationId"] = functionExecutionContext.InvocationId.ToString();
+                scriptExecutionContext["bindingData"] = bindingData;
 
                 await ProcessInputBindingsAsync(binder, scriptExecutionContext, bindingData);
 

src/WebJobs.Script/Description/ScriptFunctionInvokerBase.cs

@@ -69,7 +69,7 @@ protected virtual void OnScriptFileChanged(object sender, FileSystemEventArgs e)
 
         protected static Dictionary<string, string> GetBindingData(object value, IBinder binder, Collection<FunctionBinding> inputBindings, Collection<FunctionBinding> outputBindings)
         {
-            Dictionary<string, string> bindingData = new Dictionary<string, string>();
+            Dictionary<string, string> bindingData = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
 
             // If there are any parameters in the bindings,
             // get the binding data. In dynamic script cases we need
@@ -79,7 +79,8 @@ protected static Dictionary<string, string> GetBindingData(object value, IBinder
             if (outputBindings.Any(p => p.HasBindingParameters) ||
                 inputBindings.Any(p => p.HasBindingParameters))
             {
-                // first apply any existing binding data
+                // First apply any existing binding data. Any additional binding
+                // data coming from the message will take precedence
                 ApplyAmbientBindingData(binder, bindingData);
 
                 try
@@ -90,9 +91,20 @@ protected static Dictionary<string, string> GetBindingData(object value, IBinder
                         // parse the object skipping any nested objects (binding data
                         // only includes top level properties)
                         JObject parsed = JObject.Parse(json);
-                        bindingData = parsed.Children<JProperty>()
+                        var additionalBindingData = parsed.Children<JProperty>()
                             .Where(p => p.Value.Type != JTokenType.Object)
                             .ToDictionary(p => p.Name, p => (string)p);
+
+                        if (additionalBindingData != null)
+                        {
+                            foreach (var item in additionalBindingData)
+                            {
+                                if (item.Value != null)
+                                {
+                                    bindingData[item.Key] = item.Value.ToString();
+                                }
+                            }
+                        }
                     }
                 }
                 catch