mirror of
https://github.com/cp6/my-idlers.git
synced 2024-11-16 23:42:32 +01:00
75 lines
2.6 KiB
JavaScript
75 lines
2.6 KiB
JavaScript
"use strict";
|
|
Object.defineProperty(exports, "__esModule", { value: true });
|
|
exports.getHandlers = exports.init = void 0;
|
|
const logger_1 = require("./logger");
|
|
const logger = (0, logger_1.getInstance)();
|
|
function init(proxy, option) {
|
|
const handlers = getHandlers(option);
|
|
for (const eventName of Object.keys(handlers)) {
|
|
proxy.on(eventName, handlers[eventName]);
|
|
}
|
|
logger.debug('[HPM] Subscribed to http-proxy events:', Object.keys(handlers));
|
|
}
|
|
exports.init = init;
|
|
function getHandlers(options) {
|
|
// https://github.com/nodejitsu/node-http-proxy#listening-for-proxy-events
|
|
const proxyEventsMap = {
|
|
error: 'onError',
|
|
proxyReq: 'onProxyReq',
|
|
proxyReqWs: 'onProxyReqWs',
|
|
proxyRes: 'onProxyRes',
|
|
open: 'onOpen',
|
|
close: 'onClose',
|
|
};
|
|
const handlers = {};
|
|
for (const [eventName, onEventName] of Object.entries(proxyEventsMap)) {
|
|
// all handlers for the http-proxy events are prefixed with 'on'.
|
|
// loop through options and try to find these handlers
|
|
// and add them to the handlers object for subscription in init().
|
|
const fnHandler = options ? options[onEventName] : null;
|
|
if (typeof fnHandler === 'function') {
|
|
handlers[eventName] = fnHandler;
|
|
}
|
|
}
|
|
// add default error handler in absence of error handler
|
|
if (typeof handlers.error !== 'function') {
|
|
handlers.error = defaultErrorHandler;
|
|
}
|
|
// add default close handler in absence of close handler
|
|
if (typeof handlers.close !== 'function') {
|
|
handlers.close = logClose;
|
|
}
|
|
return handlers;
|
|
}
|
|
exports.getHandlers = getHandlers;
|
|
function defaultErrorHandler(err, req, res) {
|
|
// Re-throw error. Not recoverable since req & res are empty.
|
|
if (!req && !res) {
|
|
throw err; // "Error: Must provide a proper URL as target"
|
|
}
|
|
const host = req.headers && req.headers.host;
|
|
const code = err.code;
|
|
if (res.writeHead && !res.headersSent) {
|
|
if (/HPE_INVALID/.test(code)) {
|
|
res.writeHead(502);
|
|
}
|
|
else {
|
|
switch (code) {
|
|
case 'ECONNRESET':
|
|
case 'ENOTFOUND':
|
|
case 'ECONNREFUSED':
|
|
case 'ETIMEDOUT':
|
|
res.writeHead(504);
|
|
break;
|
|
default:
|
|
res.writeHead(500);
|
|
}
|
|
}
|
|
}
|
|
res.end(`Error occurred while trying to proxy: ${host}${req.url}`);
|
|
}
|
|
function logClose(req, socket, head) {
|
|
// view disconnected websocket connections
|
|
logger.info('[HPM] Client disconnected');
|
|
}
|