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1432065e9d
Historically `error.errno` of system errors thrown by Node.js
can sometimes be the same as `err.code`, which are string
representations of the error numbers. This is useless and incorrect,
and results in an information loss for users since then they
will have to resort to something like
`process.binding('uv'[`UV_${errno}`])` to get to the numeric
error codes.
This patch corrects this behavior by always setting `error.errno`
to be negative numbers. For fabricated errors like `ENOTFOUND`,
`error.errno` is now undefined since there is no numeric equivalent
for them anyway. For c-ares errors, `error.errno` is now undefined
because the numeric representations (negated) can be in conflict
with libuv error codes - this is fine since numeric codes was
not available for c-ares errors anyway.
Users can use the public API `util.getSystemErrorName(errno)`
to retrieve string codes for these numbers.
PR-URL: https://github.com/nodejs/node/pull/28140
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
119 lines
2.8 KiB
JavaScript
119 lines
2.8 KiB
JavaScript
'use strict';
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const assert = require('internal/assert');
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const net = require('net');
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const { sendHelper } = require('internal/cluster/utils');
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const { constants } = internalBinding('tcp_wrap');
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module.exports = RoundRobinHandle;
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function RoundRobinHandle(key, address, port, addressType, fd, flags) {
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this.key = key;
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this.all = new Map();
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this.free = [];
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this.handles = [];
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this.handle = null;
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this.server = net.createServer(assert.fail);
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if (fd >= 0)
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this.server.listen({ fd });
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else if (port >= 0) {
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this.server.listen({
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port,
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host: address,
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// Currently, net module only supports `ipv6Only` option in `flags`.
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ipv6Only: Boolean(flags & constants.UV_TCP_IPV6ONLY),
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});
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} else
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this.server.listen(address); // UNIX socket path.
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this.server.once('listening', () => {
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this.handle = this.server._handle;
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this.handle.onconnection = (err, handle) => this.distribute(err, handle);
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this.server._handle = null;
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this.server = null;
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});
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}
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RoundRobinHandle.prototype.add = function(worker, send) {
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assert(this.all.has(worker.id) === false);
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this.all.set(worker.id, worker);
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const done = () => {
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if (this.handle.getsockname) {
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const out = {};
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this.handle.getsockname(out);
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// TODO(bnoordhuis) Check err.
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send(null, { sockname: out }, null);
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} else {
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send(null, null, null); // UNIX socket.
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}
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this.handoff(worker); // In case there are connections pending.
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};
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if (this.server === null)
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return done();
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// Still busy binding.
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this.server.once('listening', done);
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this.server.once('error', (err) => {
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send(err.errno, null);
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});
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};
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RoundRobinHandle.prototype.remove = function(worker) {
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const existed = this.all.delete(worker.id);
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if (!existed)
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return false;
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const index = this.free.indexOf(worker);
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if (index !== -1)
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this.free.splice(index, 1);
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if (this.all.size !== 0)
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return false;
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for (const handle of this.handles) {
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handle.close();
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}
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this.handles = [];
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this.handle.close();
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this.handle = null;
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return true;
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};
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RoundRobinHandle.prototype.distribute = function(err, handle) {
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this.handles.push(handle);
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const worker = this.free.shift();
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if (worker)
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this.handoff(worker);
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};
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RoundRobinHandle.prototype.handoff = function(worker) {
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if (this.all.has(worker.id) === false) {
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return; // Worker is closing (or has closed) the server.
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}
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const handle = this.handles.shift();
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if (handle === undefined) {
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this.free.push(worker); // Add to ready queue again.
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return;
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}
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const message = { act: 'newconn', key: this.key };
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sendHelper(worker.process, message, handle, (reply) => {
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if (reply.accepted)
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handle.close();
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else
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this.distribute(0, handle); // Worker is shutting down. Send to another.
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this.handoff(worker);
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});
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};
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