Microsoft.Azure.WebJobs.Script.WebHost.WebScriptHostManager.GetFunctionArguments C# (CSharp) Method

        private static Dictionary<string, object> GetFunctionArguments(FunctionDescriptor function, HttpRequestMessage request)
        {
            ParameterDescriptor triggerParameter = function.Parameters.First(p => p.IsTrigger);
            Dictionary<string, object> arguments = new Dictionary<string, object>();

            if (triggerParameter.Type != typeof(HttpRequestMessage))
            {
                HttpTriggerBindingMetadata httpFunctionMetadata = (HttpTriggerBindingMetadata)function.Metadata.InputBindings.FirstOrDefault(p => string.Compare("HttpTrigger", p.Type, StringComparison.OrdinalIgnoreCase) == 0);
                if (!string.IsNullOrEmpty(httpFunctionMetadata.WebHookType))
                {
                    WebHookHandlerContext webHookContext;
                    if (request.Properties.TryGetValue(ScriptConstants.AzureFunctionsWebHookContextKey, out webHookContext))
                    {
                        // For WebHooks we want to use the WebHook library conversion methods
                        // Stuff the resolved data into the request context so the HttpTrigger binding
                        // can access it
                        var webHookData = GetWebHookData(triggerParameter.Type, webHookContext);
                        request.Properties.Add(ScriptConstants.AzureFunctionsWebHookDataKey, webHookData);
                    }
                }

                // see if the function defines a parameter to receive the HttpRequestMessage and
                // if so, pass it along
                ParameterDescriptor requestParameter = function.Parameters.FirstOrDefault(p => p.Type == typeof(HttpRequestMessage));
                if (requestParameter != null)
                {
                    arguments.Add(requestParameter.Name, request);
                }
            }

            arguments.Add(triggerParameter.Name, request);

            return arguments;
        }