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http2: fix several timeout related issues
* correctly reset write timers: currently reset timers on both session & stream when write starts and when it ends. * prevent large writes from timing out: when writing a large chunk of data in http2, once the data is handed off to C++, the JS session & stream lose all track of the write and will timeout if the write doesn't complete within the timeout window Fix this issue by tracking whether a write request is ongoing and also tracking how many chunks have been sent since the most recent write started. (Since each write call resets the timer.) PR-URL: #16525 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: James M Snell <jasnell@gmail.com>
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Original file line number | Diff line number | Diff line change |
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'use strict'; | ||
const common = require('../common'); | ||
if (!common.hasCrypto) | ||
common.skip('missing crypto'); | ||
const assert = require('assert'); | ||
const fixtures = require('../common/fixtures'); | ||
const fs = require('fs'); | ||
const http2 = require('http2'); | ||
const path = require('path'); | ||
|
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common.refreshTmpDir(); | ||
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// This test assesses whether long-running writes can complete | ||
// or timeout because the session or stream are not aware that the | ||
// backing stream is still writing. | ||
// To simulate a slow client, we write a really large chunk and | ||
// then proceed through the following cycle: | ||
// 1) Receive first 'data' event and record currently written size | ||
// 2) Once we've read up to currently written size recorded above, | ||
// we pause the stream and wait longer than the server timeout | ||
// 3) Socket.prototype._onTimeout triggers and should confirm | ||
// that the backing stream is still active and writing | ||
// 4) Our timer fires, we resume the socket and start at 1) | ||
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const writeSize = 3000000; | ||
const minReadSize = 500000; | ||
const serverTimeout = common.platformTimeout(500); | ||
let offsetTimeout = common.platformTimeout(100); | ||
let didReceiveData = false; | ||
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const content = Buffer.alloc(writeSize, 0x44); | ||
const filepath = path.join(common.tmpDir, 'http2-large-write.tmp'); | ||
fs.writeFileSync(filepath, content, 'binary'); | ||
const fd = fs.openSync(filepath, 'r'); | ||
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const server = http2.createSecureServer({ | ||
key: fixtures.readKey('agent1-key.pem'), | ||
cert: fixtures.readKey('agent1-cert.pem') | ||
}); | ||
server.on('stream', common.mustCall((stream) => { | ||
stream.respondWithFD(fd, { | ||
'Content-Type': 'application/octet-stream', | ||
'Content-Length': content.length.toString(), | ||
'Vary': 'Accept-Encoding' | ||
}); | ||
stream.setTimeout(serverTimeout); | ||
stream.on('timeout', () => { | ||
assert.strictEqual(didReceiveData, false, 'Should not timeout'); | ||
}); | ||
stream.end(); | ||
})); | ||
server.setTimeout(serverTimeout); | ||
server.on('timeout', () => { | ||
assert.strictEqual(didReceiveData, false, 'Should not timeout'); | ||
}); | ||
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server.listen(0, common.mustCall(() => { | ||
const client = http2.connect(`https://localhost:${server.address().port}`, | ||
{ rejectUnauthorized: false }); | ||
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const req = client.request({ ':path': '/' }); | ||
req.end(); | ||
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const resume = () => req.resume(); | ||
let receivedBufferLength = 0; | ||
let firstReceivedAt; | ||
req.on('data', common.mustCallAtLeast((buf) => { | ||
if (receivedBufferLength === 0) { | ||
didReceiveData = false; | ||
firstReceivedAt = Date.now(); | ||
} | ||
receivedBufferLength += buf.length; | ||
if (receivedBufferLength >= minReadSize && | ||
receivedBufferLength < writeSize) { | ||
didReceiveData = true; | ||
receivedBufferLength = 0; | ||
req.pause(); | ||
setTimeout( | ||
resume, | ||
serverTimeout + offsetTimeout - (Date.now() - firstReceivedAt) | ||
); | ||
offsetTimeout = 0; | ||
} | ||
}, 1)); | ||
req.on('end', common.mustCall(() => { | ||
client.destroy(); | ||
server.close(); | ||
})); | ||
})); |
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