this.run = function()

in knative-build/runtimes/javascript/platform/knative.js [488:573]
69 lines of code
19 McCabe index (conditional complexity)

    this.run = function(req, res) {

        try {
            DEBUG.dumpObject(service.initialized(),"service.initialized()");

            // Do not process requests with init. data if this is not a "stem" cell
            if (hasInitData(req) && !isStemCell(process.env))
                throw ("Cannot initialize a runtime with a dedicated function.");

            // If this is a dedicated, uninitialized runtime, then copy INIT data from env. into the request
            if( !isStemCell(process.env) && !service.initialized()){
                let body = req.body || {};
                body.init = createInitDataFromEnvironment(process.env);
            }

            // Different pre-processing logic based upon request data needed due Promise behavior
            if(hasInitData(req) && hasActivationData(req)) {
                // Request has both Init and Run (activation) data
                preProcessRequest(req);
                // Invoke the OW "init" entrypoint
                service.initCode(req).then(function () {
                    // delete any INIT data (e.g., code, raw, etc.) from the 'value' data before calling run().
                    removeInitData(req.body);
                    // Invoke the OW "run" entrypoint
                    service.runCode(req).then(function (result) {
                        postProcessResponse(req, result, res)
                    });
                }).catch(function (error) {
                    console.error(error);
                    if (typeof error.code === "number" && typeof error.response !== "undefined") {
                        res.status(error.code).json(error.response);
                    } else {
                        console.error("[wrapEndpoint]", "invalid errored promise", JSON.stringify(error));
                        res.status(500).json({ error: "Internal error during function execution." });
                    }
                });
            } else if(hasInitData(req)){
                // Request has ONLY Init data
                preProcessRequest(req);
                // Invoke the OW "init" entrypoint
                service.initCode(req).then(function (result) {
                    res.status(result.code).send(result.response);
                }).catch(function (error) {
                    console.error(error);
                    if (typeof error.code === "number" && typeof error.response !== "undefined") {
                        res.status(error.code).json(error.response);
                    } else {
                        console.error("[wrapEndpoint]", "invalid errored promise", JSON.stringify(error));
                        res.status(500).json({ error: "Internal error during function execution." });
                    }
                });
            } else if(hasActivationData(req)){
                // Request has ONLY Run (activation) data
                preProcessRequest(req);
                // Invoke the OW "run" entrypoint
                service.runCode(req).then(function (result) {
                    postProcessResponse(req, result, res)
                }).catch(function (error) {
                    console.error(error);
                    if (typeof error.code === "number" && typeof error.response !== "undefined") {
                        res.status(error.code).json(error.response);
                    } else {
                        console.error("[wrapEndpoint]", "invalid errored promise", JSON.stringify(error));
                        res.status(500).json({ error: "Internal error during function execution." });
                    }
                });
            } else {
                preProcessRequest(req);
                // Invoke the OW "run" entrypoint
                service.runCode(req).then(function (result) {
                    postProcessResponse(req, result, res)
                }).catch(function (error) {
                    console.error(error);
                    if (typeof error.code === "number" && typeof error.response !== "undefined") {
                        res.status(error.code).json(error.response);
                    } else {
                        console.error("[wrapEndpoint]", "invalid errored promise", JSON.stringify(error));
                        res.status(500).json({ error: "Internal error during function execution." });
                    }
                });
            }

        } catch (e) {
            res.status(500).json({error: "internal error during request processing."})
        }
    };