node/test/simple/test-http-client-race-2.js

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

//
// Slight variation on test-http-client-race to test for another race
// condition involving the parsers FreeList used internally by http.Client.
//

var body1_s = "1111111111111111";
var body2_s = "22222";
var body3_s = "3333333333333333333";

var server = http.createServer(function (req, res) {
  var pathname = url.parse(req.url).pathname;

  var body;
  switch (pathname) {
    case "/1": body = body1_s; break;
    case "/2": body = body2_s; break;
    default: body = body3_s;
  };

  res.writeHead(200, { "Content-Type": "text/plain"
                     , "Content-Length": body.length
                     });
  res.end(body);
});
server.listen(common.PORT);

var body1 = "";
var body2 = "";
var body3 = "";

server.addListener("listening", function() {
  var client = http.createClient(common.PORT);

  //
  // Client #1 is assigned Parser #1
  //
  var req1 = client.request("/1")
  req1.end();
  req1.addListener('response', function (res1) {
    res1.setEncoding("utf8");

    res1.addListener('data', function (chunk) {
      body1 += chunk;
    });

    res1.addListener('end', function () {
      //
      // Delay execution a little to allow the "close" event to be processed
      // (required to trigger this bug!)
      //
      setTimeout(function () {
        //
        // The bug would introduce itself here: Client #2 would be allocated the
        // parser that previously belonged to Client #1. But we're not finished
        // with Client #1 yet!
        //
        var client2 = http.createClient(common.PORT);

        //
        // At this point, the bug would manifest itself and crash because the
        // internal state of the parser was no longer valid for use by Client #1.
        //
        var req2 = client.request("/2");
        req2.end();
        req2.addListener('response', function (res2) {
          res2.setEncoding("utf8");
          res2.addListener('data', function (chunk) { body2 += chunk; });
          res2.addListener('end', function () {

            //
            // Just to be really sure we've covered all our bases, execute a
            // request using client2.
            //
            var req3 = client2.request("/3");
            req3.end();
            req3.addListener('response', function (res3) {
              res3.setEncoding("utf8");
              res3.addListener('data', function (chunk) { body3 += chunk });
              res3.addListener('end', function() { server.close(); });
            });
          });
        });
      }, 500);
    });
  });
});

process.addListener("exit", function () {
  assert.equal(body1_s, body1);
  assert.equal(body2_s, body2);
  assert.equal(body3_s, body3);
});