node/test/simple/test-http-set-trailers.js

common = require("../common");
assert = common.assert;
http = require("http");
net = require("net");

outstanding_reqs = 0;

var server = http.createServer(function(req, res) {
  res.writeHead(200, [ ['content-type', 'text/plain'] ]);
  res.addTrailers({"x-foo": "bar"});
  res.end("stuff" + "\n");
});
server.listen(common.PORT);


// first, we test an HTTP/1.0 request.
server.addListener("listening", function() {
  var c = net.createConnection(common.PORT);
  var res_buffer = "";

  c.setEncoding("utf8");

  c.addListener("connect", function () {
    outstanding_reqs++;
    c.write( "GET / HTTP/1.0\r\n\r\n" );
  });

  c.addListener("data", function (chunk) {
//    console.log(chunk);
    res_buffer += chunk;
  });

  c.addListener("end", function () {
    c.end();
    assert.ok(! /x-foo/.test(res_buffer), "Trailer in HTTP/1.0 response.");
    outstanding_reqs--;
    if (outstanding_reqs == 0) {
        server.close();
        process.exit();
    }
  });
});

// now, we test an HTTP/1.1 request.
server.addListener("listening", function() {
  var c = net.createConnection(common.PORT);
  var res_buffer = "";
  var tid;

  c.setEncoding("utf8");

  c.addListener("connect", function () {
    outstanding_reqs++;
    c.write( "GET / HTTP/1.1\r\n\r\n" );
    tid = setTimeout(assert.fail, 2000, "Couldn't find last chunk.");
  });

  c.addListener("data", function (chunk) {
//    console.log(chunk);
    res_buffer += chunk;
    if (/0\r\n/.test(res_buffer)) { // got the end.
        outstanding_reqs--;
        clearTimeout(tid);
        assert.ok(
            /0\r\nx-foo: bar\r\n\r\n$/.test(res_buffer),
            "No trailer in HTTP/1.1 response."
        );
        if (outstanding_reqs == 0) {
            server.close();
            process.exit();
        }
    }
  });
});

// now, see if the client sees the trailers.
server.addListener('listening', function() {
  var client = http.createClient(common.PORT);
  var req = client.request("/hello", {});
  req.end();
  outstanding_reqs++;
  req.addListener('response', function (res) {
    res.addListener('end', function () {
//      console.log(res.trailers);
      assert.ok("x-foo" in res.trailers,
        "Client doesn't see trailers.");
      outstanding_reqs--;
      if (outstanding_reqs == 0) {
        server.close();
        process.exit();
      }
    });
  });
});