52 lines
1.4 KiB
JavaScript
52 lines
1.4 KiB
JavaScript
const bodyParser = require('body-parser');
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import {sendActionToService} from '@truss/comm';
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const debug = require('debug')('truss:gateway:listener');
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const parser = bodyParser.json();
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export default function(serviceMap, req, res) { parser(req, res, () => {
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debug(`HTTP ${req.method} ${req.url}`);
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// map to action
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const action = {type: undefined, payload: {url: req.url}};
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switch (req.method) {
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case 'POST':
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// truss action
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if (req.url.startsWith('/truss/action/')) {
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action.type = req.url.substr('/truss/action/'.length);
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}
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// truss/http-post
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else {
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action.type = 'truss/http-post';
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}
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action.payload.body = req.body;
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break;
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default:
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// truss/http-(get|delete|...)
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action.type = `truss/http-${req.method.toLowerCase()}`;
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action.payload.headers = req.headers;
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break;
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}
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// listeners...
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for (service of serviceMap.listeners[action.type] || []) {
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sendActionToService(action, service).done();
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}
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// executor
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if (!(action.type in serviceMap.executors)) {
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debug(`No executor for ${action.type}!`);
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res.writeHead(501);
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res.end(
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'<!DOCTYPE html><html><body><h1>501 Not Implemented</h1></body></html>'
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);
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return;
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}
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sendActionToService(
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action, serviceMap.executors[action.type]
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).then(({status, headers, html}) => {
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// deliver
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res.writeHead(status || 200, headers);
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res.end(html);
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}).catch(console.error);
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})};
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