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'use strict';
const common = require('../common');
const assert = require('assert');
const http = require('http');
function createServer(count) {
return http.createServer(common.mustCallAtLeast((req, res) => {
// Return the remote port number used for this connection.
res.end(req.socket.remotePort.toString(10));
}), count);
}
function makeRequest(url, agent, callback) {
http
.request(url, { agent }, (res) => {
let data = '';
res.setEncoding('ascii');
res.on('data', (c) => {
data += c;
});
res.on('end', () => {
process.nextTick(callback, data);
});
})
.end();
}
function bulkRequest(url, agent, done) {
const ports = [];
let count = agent.maxSockets;
for (let i = 0; i < agent.maxSockets; i++) {
makeRequest(url, agent, callback);
}
function callback(port) {
count -= 1;
ports.push(port);
if (count === 0) {
done(ports);
}
}
}
function defaultTest() {
const server = createServer(8);
server.listen(0, onListen);
function onListen() {
const url = `http://localhost:${server.address().port}`;
const agent = new http.Agent({
keepAlive: true,
maxSockets: 5
});
bulkRequest(url, agent, (ports) => {
makeRequest(url, agent, (port) => {
assert.strictEqual(ports[ports.length - 1], port);
makeRequest(url, agent, (port) => {
assert.strictEqual(ports[ports.length - 1], port);
makeRequest(url, agent, (port) => {
assert.strictEqual(ports[ports.length - 1], port);
server.close();
agent.destroy();
});
});
});
});
}
}
function fifoTest() {
const server = createServer(8);
server.listen(0, onListen);
function onListen() {
const url = `http://localhost:${server.address().port}`;
const agent = new http.Agent({
keepAlive: true,
maxSockets: 5,
scheduling: 'fifo'
});
bulkRequest(url, agent, (ports) => {
makeRequest(url, agent, (port) => {
assert.strictEqual(ports[0], port);
makeRequest(url, agent, (port) => {
assert.strictEqual(ports[1], port);
makeRequest(url, agent, (port) => {
assert.strictEqual(ports[2], port);
server.close();
agent.destroy();
});
});
});
});
}
}
function lifoTest() {
const server = createServer(8);
server.listen(0, onListen);
function onListen() {
const url = `http://localhost:${server.address().port}`;
const agent = new http.Agent({
keepAlive: true,
maxSockets: 5,
scheduling: 'lifo'
});
bulkRequest(url, agent, (ports) => {
makeRequest(url, agent, (port) => {
assert.strictEqual(ports[ports.length - 1], port);
makeRequest(url, agent, (port) => {
assert.strictEqual(ports[ports.length - 1], port);
makeRequest(url, agent, (port) => {
assert.strictEqual(ports[ports.length - 1], port);
server.close();
agent.destroy();
});
});
});
});
}
}
function badSchedulingOptionTest() {
try {
new http.Agent({
keepAlive: true,
maxSockets: 5,
scheduling: 'filo'
});
} catch (err) {
assert.strictEqual(err.code, 'ERR_INVALID_ARG_VALUE');
assert.strictEqual(
err.message,
"The argument 'scheduling' must be one of: 'fifo', 'lifo'. " +
"Received 'filo'"
);
}
}
defaultTest();
fifoTest();
lifoTest();
badSchedulingOptionTest();
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