Microsoft.Azure.WebJobs.Script.ScriptHost.TryParseFunctionMetadata C# (CSharp) Method

        internal static bool TryParseFunctionMetadata(string functionName, JObject functionConfig, Dictionary<string, HttpTriggerBindingMetadata> mappedHttpFunctions, TraceWriter traceWriter, Lazy<string[]> functionFilesProvider, out FunctionMetadata functionMetadata, out string error)
        {
            error = null;
            functionMetadata = ParseFunctionMetadata(functionName, functionConfig);

            if (functionMetadata.IsExcluded)
            {
                traceWriter.Info(string.Format("Function '{0}' is marked as excluded", functionName));
                functionMetadata = null;
                return true;
            }

            if (functionMetadata.IsDisabled)
            {
                traceWriter.Info(string.Format("Function '{0}' is disabled", functionName));
            }

            // determine the primary script
            string[] functionFiles = functionFilesProvider.Value;
            if (functionFiles.Length == 0)
            {
                error = "No function script files present.";
                return false;
            }
            string scriptFile = DeterminePrimaryScriptFile(functionConfig, functionFiles);
            if (string.IsNullOrEmpty(scriptFile))
            {
                error =
                    "Unable to determine the primary function script. Try renaming your entry point script to 'run' (or 'index' in the case of Node), " +
                    "or alternatively you can specify the name of the entry point script explicitly by adding a 'scriptFile' property to your function metadata.";
                return false;
            }
            functionMetadata.ScriptFile = scriptFile;

            // determine the script type based on the primary script file extension
            functionMetadata.ScriptType = ParseScriptType(functionMetadata.ScriptFile);

            functionMetadata.EntryPoint = (string)functionConfig["entryPoint"];

            var httpTriggerBindingMetadata = functionMetadata.InputBindings.OfType<HttpTriggerBindingMetadata>().SingleOrDefault();
            if (httpTriggerBindingMetadata != null)
            {
                if (string.IsNullOrWhiteSpace(httpTriggerBindingMetadata.Route))
                {
                    // if no explicit route is provided, default to the function name
                    httpTriggerBindingMetadata.Route = functionName;
                }

                // disallow custom routes in our own reserved route space
                string httpRoute = httpTriggerBindingMetadata.Route.Trim('/').ToLowerInvariant();
                if (httpRoute.StartsWith("admin"))
                {
                    error = "The specified route conflicts with one or more built in routes.";
                    return false;
                }

                // prevent duplicate/conflicting routes
                foreach (var pair in mappedHttpFunctions)
                {
                    if (HttpRoutesConflict(httpTriggerBindingMetadata, pair.Value))
                    {
                        error = $"The route specified conflicts with the route defined by function '{pair.Key}'.";
                        return false;
                    }
                }

                mappedHttpFunctions.Add(functionName, httpTriggerBindingMetadata);
            }

            return true;
        }