node/test/parallel/test-http2-head-request.js

//
'use strict';

const common = require('../common');
if (!common.hasCrypto)
  common.skip('missing crypto');
const assert = require('assert');
const http2 = require('http2');

const errCheck = common.expectsError({
  type: Error,
  message: 'write after end'
}, 2);

const {
  HTTP2_HEADER_PATH,
  HTTP2_HEADER_METHOD,
  HTTP2_HEADER_STATUS,
  HTTP2_METHOD_HEAD,
} = http2.constants;

const server = http2.createServer();
server.on('stream', (stream, headers) => {

  assert.strictEqual(headers[HTTP2_HEADER_METHOD], HTTP2_METHOD_HEAD);

  stream.respond({ [HTTP2_HEADER_STATUS]: 200 });

  // Because this is a head request, the outbound stream is closed automatically
  stream.on('error', common.mustCall(errCheck));
  stream.write('data');
});


server.listen(0, () => {

  const client = http2.connect(`http://localhost:${server.address().port}`);

  const req = client.request({
    [HTTP2_HEADER_METHOD]: HTTP2_METHOD_HEAD,
    [HTTP2_HEADER_PATH]: '/'
  });

  // Because it is a HEAD request, the payload is meaningless. The
  // option.endStream flag is set automatically making the stream
  // non-writable.
  req.on('error', common.mustCall(errCheck));
  req.write('data');

  req.on('response', common.mustCall((headers, flags) => {
    assert.strictEqual(headers[HTTP2_HEADER_STATUS], 200);
    assert.strictEqual(flags, 5); // the end of stream flag is set
  }));
  req.on('data', common.mustNotCall());
  req.on('end', common.mustCall(() => {
    server.close();
    client.destroy();
  }));
});