node/test/simple/test-tls-pause.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.

if (!process.versions.openssl) {
  console.error('Skipping because node compiled without OpenSSL.');
  process.exit(0);
}

var common = require('../common');
var assert = require('assert');
var tls = require('tls');
var fs = require('fs');
var path = require('path');

var options = {
  key: fs.readFileSync(path.join(common.fixturesDir, 'test_key.pem')),
  cert: fs.readFileSync(path.join(common.fixturesDir, 'test_cert.pem'))
};

var bufSize = 1024 * 1024;
var sent = 0;
var received = 0;

var server = tls.Server(options, function(socket) {
  socket.pipe(socket);
});

server.listen(common.PORT, function() {
  var resumed = false;
  var client = tls.connect({
    port: common.PORT,
    rejectUnauthorized: false
  }, function() {
    client.pause();
    common.debug('paused');
    send();
    function send() {
      if (client.write(new Buffer(bufSize))) {
        sent += bufSize;
        assert.ok(sent < 100 * 1024 * 1024); // max 100MB
        return process.nextTick(send);
      }
      sent += bufSize;
      common.debug('sent: ' + sent);
      resumed = true;
      client.resume();
      common.debug('resumed');
    }
  });
  client.on('data', function(data) {
    assert.ok(resumed);
    received += data.length;
    if (received >= sent) {
      common.debug('received: ' + received);
      client.end();
      server.close();
    }
  });
});

process.on('exit', function() {
  assert.equal(sent, received);
});