clientlinker-flow-httpproxy/route/index.js

Httpproxy flow for clientlinker

const httpAction = require('./http_action');
const reqUniqKey = require('./req_uniq_key');

exports = module.exports = HttpProxyRoute;
exports.express = routeExpress;
exports.koa = routeKoa;

function HttpProxyRoute(linker) {
	return function HttpProxyRouteHandle(req, res, next) {
		const serverRouterTime = new Date();
		res.set('XH-Httpproxy-RequestTime', +serverRouterTime);

		if (arguments.length >= 3)
			return routeExpress(linker, serverRouterTime, req, res, next);
		else return routeKoa(linker, serverRouterTime, req, res);
	};
}

function routeKoa(linker, serverRouterTime, ctx, next) {
	if (!linker) return next();

	return cgihandler(linker, serverRouterTime, ctx.req).then(function(output) {
		const res = ctx.response;
		res.statusCode = output.statusCode || 200;
		res.type = 'json';
		res.body = output.data;
		res.set('XH-Httpproxy-ResponseTime', Date.now());
	});
}

function routeExpress(linker, serverRouterTime, req, res, next) {
	if (!linker) return next();

	return cgihandler(linker, serverRouterTime, req).then(function(output) {
		res.statusCode = output.statusCode || 200;
		res.set('XH-Httpproxy-ResponseTime', Date.now());
		res.json(output.data);
	});
}

function cgihandler(linker, serverRouterTime, req) {
	if (req.query.cgi == 'req_uniq_key') {
		return reqUniqKey(linker, req);
	} else {
		return httpAction(linker, serverRouterTime, req);
	}
}