internal static void ValidateFunction()

in src/WebJobs.Script/Host/ScriptHost.cs [887:921]
29 lines of code
10 McCabe index (conditional complexity)

        internal static void ValidateFunction(FunctionDescriptor function, Dictionary<string, HttpTriggerAttribute> httpFunctions, IEnvironment environment)
        {
            var httpTrigger = function.HttpTriggerAttribute;
            if (httpTrigger != null)
            {
                bool isProxy = function.Metadata != null && function.Metadata.IsProxy();

                ValidateHttpFunction(function.Name, httpTrigger, isProxy);

                if (!isProxy)
                {
                    // prevent duplicate/conflicting routes for functions
                    // proxy routes check is done in the proxy dll itself and proxies do not use routePrefix so should not check conflict with functions
                    foreach (var pair in httpFunctions)
                    {
                        if (HttpRoutesConflict(httpTrigger, pair.Value))
                        {
                            throw new InvalidOperationException($"The route specified conflicts with the route defined by function '{pair.Key}'.");
                        }
                    }
                }

                if (httpFunctions.ContainsKey(function.Name))
                {
                    throw new InvalidOperationException($"The function or proxy name '{function.Name}' must be unique within the function app.");
                }

                httpFunctions.Add(function.Name, httpTrigger);
            }
            if (environment.IsFlexConsumptionSku()
                && function.Metadata != null && function.Metadata.IsLegacyBlobTriggerFunction())
            {
                throw new InvalidOperationException($"The Flex Consumption SKU only supports EventGrid as the source for BlobTrigger functions. Please update function '{function.Name}' to use EventGrid. For more information see https://aka.ms/blob-trigger-eg.");
            }
        }