node/test/parallel/test-https-truncate.js

// Copyright Joyent, Inc. and other Node contributors.
//
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// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
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// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';
const common = require('../common');

if (!common.hasCrypto)
  common.skip('missing crypto');

const assert = require('assert');
const https = require('https');

const fs = require('fs');

const key = fs.readFileSync(`${common.fixturesDir}/keys/agent1-key.pem`);
const cert = fs.readFileSync(`${common.fixturesDir}/keys/agent1-cert.pem`);

// number of bytes discovered empirically to trigger the bug
const data = Buffer.alloc(1024 * 32 + 1);

httpsTest();

function httpsTest() {
  const sopt = { key: key, cert: cert };

  const server = https.createServer(sopt, function(req, res) {
    res.setHeader('content-length', data.length);
    res.end(data);
    server.close();
  });

  server.listen(0, function() {
    const opts = { port: this.address().port, rejectUnauthorized: false };
    https.get(opts).on('response', function(res) {
      test(res);
    });
  });
}


const test = common.mustCall(function(res) {
  res.on('end', common.mustCall(function() {
    assert.strictEqual(res._readableState.length, 0);
    assert.strictEqual(bytes, data.length);
  }));

  // Pause and then resume on each chunk, to ensure that there will be
  // a lone byte hanging out at the very end.
  let bytes = 0;
  res.on('data', function(chunk) {
    bytes += chunk.length;
    this.pause();
    setTimeout(this.resume.bind(this), 1);
  });
});