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'use strict';
// This test ensures that servers are able to send data independent of window
// size.
// TODO: This test makes large buffer allocations (128KiB) and should be tested
// on smaller / IoT platforms in case this poses problems for these targets.
const common = require('../common');
if (!common.hasCrypto)
common.skip('missing crypto');
const assert = require('assert');
const h2 = require('http2');
// Given a list of buffers and an initial window size, have a server write
// each buffer to the HTTP2 Writable stream, and let the client verify that
// all of the bytes were sent correctly
function run(buffers, initialWindowSize) {
return new Promise((resolve, reject) => {
const expectedBuffer = Buffer.concat(buffers);
const server = h2.createServer();
server.on('stream', (stream) => {
let i = 0;
const writeToStream = () => {
const cont = () => {
i++;
if (i < buffers.length) {
setImmediate(writeToStream);
} else {
stream.end();
}
};
const drained = stream.write(buffers[i]);
if (drained) {
cont();
} else {
stream.once('drain', cont);
}
};
writeToStream();
});
server.listen(0);
server.on('listening', common.mustCall(function() {
const port = this.address().port;
const client =
h2.connect({
authority: 'localhost',
protocol: 'http:',
port
}, {
settings: {
initialWindowSize
}
}).on('connect', common.mustCall(() => {
const req = client.request({
':method': 'GET',
':path': '/'
});
const responses = [];
req.on('data', (data) => {
responses.push(data);
});
req.on('end', common.mustCall(() => {
const actualBuffer = Buffer.concat(responses);
assert.strictEqual(Buffer.compare(actualBuffer, expectedBuffer), 0);
// shut down
client.close();
server.close(() => {
resolve();
});
}));
req.end();
}));
}));
});
}
const bufferValueRange = [0, 1, 2, 3];
const buffersList = [
bufferValueRange.map((a) => Buffer.alloc(1 << 4, a)),
bufferValueRange.map((a) => Buffer.alloc((1 << 8) - 1, a)),
// Specifying too large of a value causes timeouts on some platforms
// bufferValueRange.map((a) => Buffer.alloc(1 << 17, a))
];
const initialWindowSizeList = [
1 << 4,
(1 << 8) - 1,
1 << 8,
1 << 17,
undefined // Use default window size which is (1 << 16) - 1
];
// Call `run` on each element in the cartesian product of buffersList and
// initialWindowSizeList.
let p = Promise.resolve();
for (const buffers of buffersList) {
for (const initialWindowSize of initialWindowSizeList) {
p = p.then(() => run(buffers, initialWindowSize));
}
}
p.then(common.mustCall(() => {}));
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