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| Current File : //proc/self/root/home/ubuntu/node-v16.18.1/test/parallel/test-http-highwatermark.js |
'use strict';
const common = require('../common');
const assert = require('assert');
const net = require('net');
const http = require('http');
// These test cases to check socketOnDrain where needPause becomes false.
// When send large response enough to exceed highWaterMark, it expect the socket
// to be paused and res.write would be failed.
// And it should be resumed when outgoingData falls below highWaterMark.
let requestReceived = 0;
const server = http.createServer(function(req, res) {
const id = ++requestReceived;
const enoughToDrain = req.connection.writableHighWaterMark;
const body = 'x'.repeat(enoughToDrain * 100);
if (id === 1) {
// Case of needParse = false
req.connection.once('pause', common.mustCall(() => {
assert(req.connection._paused, '_paused must be true because it exceeds' +
'highWaterMark by second request');
}));
} else {
// Case of needParse = true
const resume = req.connection.parser.resume.bind(req.connection.parser);
req.connection.parser.resume = common.mustCall((...args) => {
const paused = req.connection._paused;
assert(!paused, '_paused must be false because it become false by ' +
'socketOnDrain when outgoingData falls below ' +
'highWaterMark');
return resume(...args);
});
}
assert(!res.write(body), 'res.write must return false because it will ' +
'exceed highWaterMark on this call');
res.end();
}).on('listening', () => {
const c = net.createConnection(server.address().port, () => {
c.write('GET / HTTP/1.1\r\n\r\n');
c.write('GET / HTTP/1.1\r\n\r\n',
() => setImmediate(() => c.resume()));
c.end();
});
c.on('end', () => {
server.close();
});
});
server.listen(0);
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