/*
     This file is part of libmicrohttpd
     Copyright (C) 2007, 2009, 2011, 2019 Christian Grothoff
     Copyright (C) 2014-2022 Evgeny Grin (Karlson2k)

     libmicrohttpd is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published
     by the Free Software Foundation; either version 2, or (at your
     option) any later version.

     libmicrohttpd is distributed in the hope that it will be useful, but
     WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     General Public License for more details.

     You should have received a copy of the GNU General Public License
     along with libmicrohttpd; see the file COPYING.  If not, write to the
     Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
*/
/**
 * @file test_get_empty.c
 * @brief  Testcase for libmicrohttpd GET operations returning an empty body
 * @author Christian Grothoff
 * @author Karlson2k (Evgeny Grin)
 */
#include "MHD_config.h"
#include "platform.h"
#include <curl/curl.h>
#include <microhttpd.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "mhd_has_in_name.h"
#include "mhd_has_param.h"
#include "mhd_sockets.h" /* only macros used */


#define EXPECTED_URI_PATH "/hello_world?a=%26&b=c"

#ifdef _WIN32
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN 1
#endif /* !WIN32_LEAN_AND_MEAN */
#include <windows.h>
#endif

#ifndef WINDOWS
#include <unistd.h>
#include <sys/socket.h>
#endif

#if defined(MHD_CPU_COUNT) && (MHD_CPU_COUNT + 0) < 2
#undef MHD_CPU_COUNT
#endif
#if ! defined(MHD_CPU_COUNT)
#define MHD_CPU_COUNT 2
#endif

static int oneone;
static uint16_t global_port;

struct CBC
{
  char *buf;
  size_t pos;
  size_t size;
};


static size_t
copyBuffer (void *ptr, size_t size, size_t nmemb, void *ctx)
{
  struct CBC *cbc = ctx;

  if (cbc->pos + size * nmemb > cbc->size)
    return 0;                   /* overflow */
  memcpy (&cbc->buf[cbc->pos], ptr, size * nmemb);
  cbc->pos += size * nmemb;
  return size * nmemb;
}


static void *
log_cb (void *cls,
        const char *uri,
        struct MHD_Connection *con)
{
  (void) cls;
  (void) con;
  if (0 != strcmp (uri,
                   EXPECTED_URI_PATH))
  {
    fprintf (stderr,
             "Wrong URI: `%s'\n",
             uri);
    _exit (22);
  }
  return NULL;
}


static int
ahc_echo (void *cls,
          struct MHD_Connection *connection,
          const char *url,
          const char *method,
          const char *version,
          const char *upload_data, size_t *upload_data_size,
          void **req_cls)
{
  static int ptr;
  const char *me = cls;
  struct MHD_Response *response;
  int ret;
  (void) version;
  (void) upload_data;
  (void) upload_data_size;       /* Unused. Silence compiler warning. */

  if (0 != strcmp (me, method))
    return MHD_NO;              /* unexpected method */
  if (&ptr != *req_cls)
  {
    *req_cls = &ptr;
    return MHD_YES;
  }
  *req_cls = NULL;
  response = MHD_create_response_empty (MHD_RF_NONE);
  ret = MHD_queue_response (connection,
                            MHD_HTTP_NO_CONTENT,
                            response);
  MHD_destroy_response (response);
  if (ret == MHD_NO)
  {
    fprintf (stderr, "Failed to queue response.\n");
    _exit (19);
  }
  return ret;
}


static unsigned int
testInternalGet (uint32_t poll_flag)
{
  struct MHD_Daemon *d;
  CURL *c;
  char buf[2048];
  struct CBC cbc;
  CURLcode errornum;

  if ( (0 == global_port) &&
       (MHD_NO == MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT)) )
  {
    global_port = 1220;
    if (oneone)
      global_port += 20;
  }

  cbc.buf = buf;
  cbc.size = 2048;
  cbc.pos = 0;
  d = MHD_start_daemon (MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG
                        | (enum MHD_FLAG) poll_flag,
                        global_port, NULL, NULL,
                        &ahc_echo, "GET",
                        MHD_OPTION_URI_LOG_CALLBACK, &log_cb, NULL,
                        MHD_OPTION_END);
  if (d == NULL)
    return 1;
  if (0 == global_port)
  {
    const union MHD_DaemonInfo *dinfo;
    dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_BIND_PORT);
    if ((NULL == dinfo) || (0 == dinfo->port) )
    {
      MHD_stop_daemon (d); return 32;
    }
    global_port = dinfo->port;
  }
  c = curl_easy_init ();
  curl_easy_setopt (c, CURLOPT_URL, "http://127.0.0.1" EXPECTED_URI_PATH);
  curl_easy_setopt (c, CURLOPT_PORT, (long) global_port);
  curl_easy_setopt (c, CURLOPT_WRITEFUNCTION, &copyBuffer);
  curl_easy_setopt (c, CURLOPT_WRITEDATA, &cbc);
  curl_easy_setopt (c, CURLOPT_FAILONERROR, 1L);
  curl_easy_setopt (c, CURLOPT_TIMEOUT, 150L);
  curl_easy_setopt (c, CURLOPT_CONNECTTIMEOUT, 150L);
  if (oneone)
    curl_easy_setopt (c, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
  else
    curl_easy_setopt (c, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
  /* NOTE: use of CONNECTTIMEOUT without also
     setting NOSIGNAL results in really weird
     crashes on my system!*/
  curl_easy_setopt (c, CURLOPT_NOSIGNAL, 1L);
  if (CURLE_OK != (errornum = curl_easy_perform (c)))
  {
    fprintf (stderr,
             "curl_easy_perform failed: `%s'\n",
             curl_easy_strerror (errornum));
    curl_easy_cleanup (c);
    MHD_stop_daemon (d);
    return 2;
  }
  curl_easy_cleanup (c);
  MHD_stop_daemon (d);
  if (cbc.pos != 0)
    return 4;
  return 0;
}


static unsigned int
testMultithreadedGet (uint32_t poll_flag)
{
  struct MHD_Daemon *d;
  CURL *c;
  char buf[2048];
  struct CBC cbc;
  CURLcode errornum;

  if ( (0 == global_port) &&
       (MHD_NO == MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT)) )
  {
    global_port = 1221;
    if (oneone)
      global_port += 20;
  }

  cbc.buf = buf;
  cbc.size = 2048;
  cbc.pos = 0;
  d = MHD_start_daemon (MHD_USE_THREAD_PER_CONNECTION
                        | MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG
                        | (enum MHD_FLAG) poll_flag,
                        global_port, NULL, NULL,
                        &ahc_echo, "GET",
                        MHD_OPTION_URI_LOG_CALLBACK, &log_cb, NULL,
                        MHD_OPTION_END);
  if (d == NULL)
    return 16;
  if (0 == global_port)
  {
    const union MHD_DaemonInfo *dinfo;
    dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_BIND_PORT);
    if ((NULL == dinfo) || (0 == dinfo->port) )
    {
      MHD_stop_daemon (d); return 32;
    }
    global_port = dinfo->port;
  }
  c = curl_easy_init ();
  curl_easy_setopt (c, CURLOPT_URL, "http://127.0.0.1" EXPECTED_URI_PATH);
  curl_easy_setopt (c, CURLOPT_PORT, (long) global_port);
  curl_easy_setopt (c, CURLOPT_WRITEFUNCTION, &copyBuffer);
  curl_easy_setopt (c, CURLOPT_WRITEDATA, &cbc);
  curl_easy_setopt (c, CURLOPT_FAILONERROR, 1L);
  curl_easy_setopt (c, CURLOPT_TIMEOUT, 150L);
  if (oneone)
    curl_easy_setopt (c, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
  else
    curl_easy_setopt (c, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
  curl_easy_setopt (c, CURLOPT_CONNECTTIMEOUT, 150L);
  /* NOTE: use of CONNECTTIMEOUT without also
     setting NOSIGNAL results in really weird
     crashes on my system! */
  curl_easy_setopt (c, CURLOPT_NOSIGNAL, 1L);
  if (CURLE_OK != (errornum = curl_easy_perform (c)))
  {
    fprintf (stderr,
             "curl_easy_perform failed: `%s'\n",
             curl_easy_strerror (errornum));
    curl_easy_cleanup (c);
    MHD_stop_daemon (d);
    return 32;
  }
  curl_easy_cleanup (c);
  MHD_stop_daemon (d);
  if (cbc.pos != 0)
    return 64;
  return 0;
}


static unsigned int
testMultithreadedPoolGet (uint32_t poll_flag)
{
  struct MHD_Daemon *d;
  CURL *c;
  char buf[2048];
  struct CBC cbc;
  CURLcode errornum;

  if ( (0 == global_port) &&
       (MHD_NO == MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT)) )
  {
    global_port = 1222;
    if (oneone)
      global_port += 20;
  }

  cbc.buf = buf;
  cbc.size = 2048;
  cbc.pos = 0;
  d = MHD_start_daemon (MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG
                        | (enum MHD_FLAG) poll_flag,
                        global_port, NULL, NULL,
                        &ahc_echo, "GET",
                        MHD_OPTION_THREAD_POOL_SIZE, MHD_CPU_COUNT,
                        MHD_OPTION_URI_LOG_CALLBACK, &log_cb, NULL,
                        MHD_OPTION_END);
  if (d == NULL)
    return 16;
  if (0 == global_port)
  {
    const union MHD_DaemonInfo *dinfo;
    dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_BIND_PORT);
    if ((NULL == dinfo) || (0 == dinfo->port) )
    {
      MHD_stop_daemon (d); return 32;
    }
    global_port = dinfo->port;
  }
  c = curl_easy_init ();
  curl_easy_setopt (c, CURLOPT_URL, "http://127.0.0.1" EXPECTED_URI_PATH);
  curl_easy_setopt (c, CURLOPT_PORT, (long) global_port);
  curl_easy_setopt (c, CURLOPT_WRITEFUNCTION, &copyBuffer);
  curl_easy_setopt (c, CURLOPT_WRITEDATA, &cbc);
  curl_easy_setopt (c, CURLOPT_FAILONERROR, 1L);
  curl_easy_setopt (c, CURLOPT_TIMEOUT, 150L);
  if (oneone)
    curl_easy_setopt (c, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
  else
    curl_easy_setopt (c, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
  curl_easy_setopt (c, CURLOPT_CONNECTTIMEOUT, 150L);
  /* NOTE: use of CONNECTTIMEOUT without also
     setting NOSIGNAL results in really weird
     crashes on my system!*/
  curl_easy_setopt (c, CURLOPT_NOSIGNAL, 1L);
  if (CURLE_OK != (errornum = curl_easy_perform (c)))
  {
    fprintf (stderr,
             "curl_easy_perform failed: `%s'\n",
             curl_easy_strerror (errornum));
    curl_easy_cleanup (c);
    MHD_stop_daemon (d);
    return 32;
  }
  curl_easy_cleanup (c);
  MHD_stop_daemon (d);
  if (cbc.pos != 0)
    return 64;
  return 0;
}


static unsigned int
testExternalGet ()
{
  struct MHD_Daemon *d;
  CURL *c;
  char buf[2048];
  struct CBC cbc;
  CURLM *multi;
  CURLMcode mret;
  fd_set rs;
  fd_set ws;
  fd_set es;
  MHD_socket maxsock;
  int maxposixs;
  int running;
  struct CURLMsg *msg;
  time_t start;
  struct timeval tv;

  if ( (0 == global_port) &&
       (MHD_NO == MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT)) )
  {
    global_port = 1223;
    if (oneone)
      global_port += 20;
  }

  multi = NULL;
  cbc.buf = buf;
  cbc.size = 2048;
  cbc.pos = 0;
  d = MHD_start_daemon (MHD_USE_ERROR_LOG,
                        global_port, NULL, NULL,
                        &ahc_echo, "GET",
                        MHD_OPTION_URI_LOG_CALLBACK, &log_cb, NULL,
                        MHD_OPTION_END);
  if (d == NULL)
    return 256;
  if (0 == global_port)
  {
    const union MHD_DaemonInfo *dinfo;
    dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_BIND_PORT);
    if ((NULL == dinfo) || (0 == dinfo->port) )
    {
      MHD_stop_daemon (d); return 32;
    }
    global_port = dinfo->port;
  }
  c = curl_easy_init ();
  curl_easy_setopt (c, CURLOPT_URL, "http://127.0.0.1" EXPECTED_URI_PATH);
  curl_easy_setopt (c, CURLOPT_PORT, (long) global_port);
  curl_easy_setopt (c, CURLOPT_WRITEFUNCTION, &copyBuffer);
  curl_easy_setopt (c, CURLOPT_WRITEDATA, &cbc);
  curl_easy_setopt (c, CURLOPT_FAILONERROR, 1L);
  if (oneone)
    curl_easy_setopt (c, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
  else
    curl_easy_setopt (c, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
  curl_easy_setopt (c, CURLOPT_TIMEOUT, 150L);
  curl_easy_setopt (c, CURLOPT_CONNECTTIMEOUT, 150L);
  /* NOTE: use of CONNECTTIMEOUT without also
     setting NOSIGNAL results in really weird
     crashes on my system! */
  curl_easy_setopt (c, CURLOPT_NOSIGNAL, 1L);


  multi = curl_multi_init ();
  if (multi == NULL)
  {
    curl_easy_cleanup (c);
    MHD_stop_daemon (d);
    return 512;
  }
  mret = curl_multi_add_handle (multi, c);
  if (mret != CURLM_OK)
  {
    curl_multi_cleanup (multi);
    curl_easy_cleanup (c);
    MHD_stop_daemon (d);
    return 1024;
  }
  start = time (NULL);
  while ((time (NULL) - start < 5) && (multi != NULL))
  {
    maxsock = MHD_INVALID_SOCKET;
    maxposixs = -1;
    FD_ZERO (&rs);
    FD_ZERO (&ws);
    FD_ZERO (&es);
    curl_multi_perform (multi, &running);
    mret = curl_multi_fdset (multi, &rs, &ws, &es, &maxposixs);
    if (mret != CURLM_OK)
    {
      curl_multi_remove_handle (multi, c);
      curl_multi_cleanup (multi);
      curl_easy_cleanup (c);
      MHD_stop_daemon (d);
      return 2048;
    }
    if (MHD_YES != MHD_get_fdset (d, &rs, &ws, &es, &maxsock))
    {
      curl_multi_remove_handle (multi, c);
      curl_multi_cleanup (multi);
      curl_easy_cleanup (c);
      MHD_stop_daemon (d);
      return 4096;
    }
    tv.tv_sec = 0;
    tv.tv_usec = 1000;
#ifdef MHD_POSIX_SOCKETS
    if (maxsock > maxposixs)
      maxposixs = maxsock;
#endif /* MHD_POSIX_SOCKETS */
    if (-1 == select (maxposixs + 1, &rs, &ws, &es, &tv))
    {
#ifdef MHD_POSIX_SOCKETS
      if (EINTR != errno)
      {
        fprintf (stderr, "Unexpected select() error: %d. Line: %d\n",
                 (int) errno, __LINE__);
        fflush (stderr);
        exit (99);
      }
#else
      if ((WSAEINVAL != WSAGetLastError ()) ||
          (0 != rs.fd_count) || (0 != ws.fd_count) || (0 != es.fd_count) )
      {
        fprintf (stderr, "Unexpected select() error: %d. Line: %d\n",
                 (int) WSAGetLastError (), __LINE__);
        fflush (stderr);
        exit (99);
      }
      Sleep (1);
#endif
    }
    curl_multi_perform (multi, &running);
    if (0 == running)
    {
      int pending;
      int curl_fine = 0;
      while (NULL != (msg = curl_multi_info_read (multi, &pending)))
      {
        if (msg->msg == CURLMSG_DONE)
        {
          if (msg->data.result == CURLE_OK)
            curl_fine = 1;
          else
          {
            fprintf (stderr,
                     "%s failed at %s:%d: `%s'\n",
                     "curl_multi_perform",
                     __FILE__,
                     __LINE__, curl_easy_strerror (msg->data.result));
            abort ();
          }
        }
      }
      if (! curl_fine)
      {
        fprintf (stderr, "libcurl haven't returned OK code\n");
        abort ();
      }
      curl_multi_remove_handle (multi, c);
      curl_multi_cleanup (multi);
      curl_easy_cleanup (c);
      c = NULL;
      multi = NULL;
    }
    MHD_run (d);
  }
  if (multi != NULL)
  {
    curl_multi_remove_handle (multi, c);
    curl_easy_cleanup (c);
    curl_multi_cleanup (multi);
  }
  MHD_stop_daemon (d);
  if (cbc.pos != 0)
    return 8192;
  return 0;
}


static unsigned int
testUnknownPortGet (uint32_t poll_flag)
{
  struct MHD_Daemon *d;
  const union MHD_DaemonInfo *di;
  CURL *c;
  char buf[2048];
  struct CBC cbc;
  CURLcode errornum;
  uint16_t port;

  struct sockaddr_in addr;
  socklen_t addr_len = sizeof(addr);
  memset (&addr, 0, sizeof(addr));
  addr.sin_family = AF_INET;
  addr.sin_port = 0;
  addr.sin_addr.s_addr = INADDR_ANY;

  cbc.buf = buf;
  cbc.size = 2048;
  cbc.pos = 0;
  d = MHD_start_daemon (MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG
                        | (enum MHD_FLAG) poll_flag,
                        0, NULL, NULL, &ahc_echo, "GET",
                        MHD_OPTION_SOCK_ADDR, &addr,
                        MHD_OPTION_URI_LOG_CALLBACK, &log_cb, NULL,
                        MHD_OPTION_END);
  if (MHD_NO == MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT))
  {
    di = MHD_get_daemon_info (d, MHD_DAEMON_INFO_LISTEN_FD);
    if (di == NULL)
      return 65536;

    if (0 != getsockname (di->listen_fd, (struct sockaddr *) &addr, &addr_len))
      return 131072;

    if (addr.sin_family != AF_INET)
      return 26214;
    port = ntohs (addr.sin_port);
  }
  else
  {
    const union MHD_DaemonInfo *dinfo;
    dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_BIND_PORT);
    if ((NULL == dinfo) || (0 == dinfo->port) )
    {
      MHD_stop_daemon (d); return 32;
    }
    port = dinfo->port;
  }

  snprintf (buf,
            sizeof(buf),
            "http://127.0.0.1:%u%s",
            (unsigned int) port,
            EXPECTED_URI_PATH);

  c = curl_easy_init ();
  curl_easy_setopt (c, CURLOPT_URL, buf);
  curl_easy_setopt (c, CURLOPT_WRITEFUNCTION, &copyBuffer);
  curl_easy_setopt (c, CURLOPT_WRITEDATA, &cbc);
  curl_easy_setopt (c, CURLOPT_FAILONERROR, 1L);
  curl_easy_setopt (c, CURLOPT_TIMEOUT, 150L);
  curl_easy_setopt (c, CURLOPT_CONNECTTIMEOUT, 150L);
  if (oneone)
    curl_easy_setopt (c, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
  else
    curl_easy_setopt (c, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
  /* NOTE: use of CONNECTTIMEOUT without also
     setting NOSIGNAL results in really weird
     crashes on my system! */
  curl_easy_setopt (c, CURLOPT_NOSIGNAL, 1L);
  if (CURLE_OK != (errornum = curl_easy_perform (c)))
  {
    fprintf (stderr,
             "curl_easy_perform failed: `%s'\n",
             curl_easy_strerror (errornum));
    curl_easy_cleanup (c);
    MHD_stop_daemon (d);
    return 524288;
  }
  curl_easy_cleanup (c);
  MHD_stop_daemon (d);
  if (cbc.pos != 0)
    return 1048576;
  return 0;
}


static unsigned int
testStopRace (uint32_t poll_flag)
{
  struct sockaddr_in sin;
  MHD_socket fd;
  struct MHD_Daemon *d;

  if ( (0 == global_port) &&
       (MHD_NO == MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT)) )
  {
    global_port = 1224;
    if (oneone)
      global_port += 20;
  }

  d = MHD_start_daemon (MHD_USE_THREAD_PER_CONNECTION
                        | MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG
                        | (enum MHD_FLAG) poll_flag,
                        global_port, NULL, NULL,
                        &ahc_echo, "GET",
                        MHD_OPTION_URI_LOG_CALLBACK, &log_cb, NULL,
                        MHD_OPTION_END);
  if (d == NULL)
    return 16;
  if (0 == global_port)
  {
    const union MHD_DaemonInfo *dinfo;
    dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_BIND_PORT);
    if ((NULL == dinfo) || (0 == dinfo->port) )
    {
      MHD_stop_daemon (d); return 32;
    }
    global_port = dinfo->port;
  }

  fd = socket (PF_INET, SOCK_STREAM, 0);
  if (fd == MHD_INVALID_SOCKET)
  {
    fprintf (stderr, "socket error\n");
    return 256;
  }

  memset (&sin, 0, sizeof(sin));
  sin.sin_family = AF_INET;
  sin.sin_port = htons (global_port);
  sin.sin_addr.s_addr = htonl (0x7f000001);

  if (connect (fd, (struct sockaddr *) (&sin), sizeof(sin)) < 0)
  {
    fprintf (stderr, "connect error\n");
    MHD_socket_close_chk_ (fd);
    return 512;
  }

  /*  printf("Waiting\n"); */
  /* Let the thread get going. */
  usleep (500000);

  /* printf("Stopping daemon\n"); */
  MHD_stop_daemon (d);

  MHD_socket_close_chk_ (fd);

  /* printf("good\n"); */
  return 0;
}


static int
ahc_empty (void *cls,
           struct MHD_Connection *connection,
           const char *url,
           const char *method,
           const char *version,
           const char *upload_data, size_t *upload_data_size,
           void **req_cls)
{
  static int ptr;
  struct MHD_Response *response;
  int ret;
  (void) cls;
  (void) url;
  (void) url;
  (void) version;          /* Unused. Silence compiler warning. */
  (void) upload_data;
  (void) upload_data_size; /* Unused. Silent compiler warning. */

  if (0 != strcmp ("GET", method))
    return MHD_NO;              /* unexpected method */
  if (&ptr != *req_cls)
  {
    *req_cls = &ptr;
    return MHD_YES;
  }
  *req_cls = NULL;
  response = MHD_create_response_empty (MHD_RF_NONE);
  ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
  MHD_destroy_response (response);
  if (ret == MHD_NO)
  {
    fprintf (stderr, "Failed to queue response.\n");
    _exit (20);
  }
  return ret;
}


static int
curlExcessFound (CURL *c, curl_infotype type, char *data, size_t size,
                 void *cls)
{
  static const char *excess_found = "Excess found";
  const size_t str_size = strlen (excess_found);
  (void) c;      /* Unused. Silent compiler warning. */

  if ((CURLINFO_TEXT == type)
      && (size >= str_size)
      && (0 == strncmp (excess_found, data, str_size)))
    *(int *) cls = 1;
  return 0;
}


static unsigned int
testEmptyGet (uint32_t poll_flag)
{
  struct MHD_Daemon *d;
  CURL *c;
  char buf[2048];
  struct CBC cbc;
  CURLcode errornum;
  int excess_found = 0;

  if ( (0 == global_port) &&
       (MHD_NO == MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT)) )
  {
    global_port = 1225;
    if (oneone)
      global_port += 20;
  }

  cbc.buf = buf;
  cbc.size = 2048;
  cbc.pos = 0;
  d = MHD_start_daemon (MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG
                        | (enum MHD_FLAG) poll_flag,
                        global_port, NULL, NULL,
                        &ahc_empty, NULL,
                        MHD_OPTION_URI_LOG_CALLBACK, &log_cb, NULL,
                        MHD_OPTION_END);
  if (d == NULL)
    return 4194304;
  if (0 == global_port)
  {
    const union MHD_DaemonInfo *dinfo;
    dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_BIND_PORT);
    if ((NULL == dinfo) || (0 == dinfo->port) )
    {
      MHD_stop_daemon (d); return 32;
    }
    global_port = dinfo->port;
  }
  c = curl_easy_init ();
  curl_easy_setopt (c, CURLOPT_URL, "http://127.0.0.1" EXPECTED_URI_PATH);
  curl_easy_setopt (c, CURLOPT_PORT, (long) global_port);
  curl_easy_setopt (c, CURLOPT_WRITEFUNCTION, &copyBuffer);
  curl_easy_setopt (c, CURLOPT_WRITEDATA, &cbc);
  curl_easy_setopt (c, CURLOPT_DEBUGFUNCTION, &curlExcessFound);
  curl_easy_setopt (c, CURLOPT_DEBUGDATA, &excess_found);
  curl_easy_setopt (c, CURLOPT_VERBOSE, 1L);
  curl_easy_setopt (c, CURLOPT_FAILONERROR, 1L);
  curl_easy_setopt (c, CURLOPT_TIMEOUT, 150L);
  curl_easy_setopt (c, CURLOPT_CONNECTTIMEOUT, 150L);
  if (oneone)
    curl_easy_setopt (c, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
  else
    curl_easy_setopt (c, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
  /* NOTE: use of CONNECTTIMEOUT without also
     setting NOSIGNAL results in really weird
     crashes on my system!*/
  curl_easy_setopt (c, CURLOPT_NOSIGNAL, 1L);
  if (CURLE_OK != (errornum = curl_easy_perform (c)))
  {
    fprintf (stderr,
             "curl_easy_perform failed: `%s'\n",
             curl_easy_strerror (errornum));
    curl_easy_cleanup (c);
    MHD_stop_daemon (d);
    return 8388608;
  }
  curl_easy_cleanup (c);
  MHD_stop_daemon (d);
  if (cbc.pos != 0)
    return 16777216;
  if (excess_found)
    return 33554432;
  return 0;
}


int
main (int argc, char *const *argv)
{
  unsigned int errorCount = 0;
  unsigned int test_result = 0;
  int verbose = 0;

  if ((NULL == argv) || (0 == argv[0]))
    return 99;
  oneone = has_in_name (argv[0], "11");
  verbose = has_param (argc, argv, "-v") || has_param (argc, argv, "--verbose");
  if (0 != curl_global_init (CURL_GLOBAL_WIN32))
    return 2;
  global_port = 0;
  test_result = testExternalGet ();
  if (test_result)
    fprintf (stderr, "FAILED: testExternalGet () - %u.\n", test_result);
  else if (verbose)
    printf ("PASSED: testExternalGet ().\n");
  errorCount += test_result;
  if (MHD_YES == MHD_is_feature_supported (MHD_FEATURE_THREADS))
  {
    test_result += testInternalGet (0);
    if (test_result)
      fprintf (stderr, "FAILED: testInternalGet (0) - %u.\n", test_result);
    else if (verbose)
      printf ("PASSED: testInternalGet (0).\n");
    errorCount += test_result;
    test_result += testMultithreadedGet (0);
    if (test_result)
      fprintf (stderr, "FAILED: testMultithreadedGet (0) - %u.\n", test_result);
    else if (verbose)
      printf ("PASSED: testMultithreadedGet (0).\n");
    errorCount += test_result;
    test_result += testMultithreadedPoolGet (0);
    if (test_result)
      fprintf (stderr, "FAILED: testMultithreadedPoolGet (0) - %u.\n",
               test_result);
    else if (verbose)
      printf ("PASSED: testMultithreadedPoolGet (0).\n");
    errorCount += test_result;
    test_result += testUnknownPortGet (0);
    if (test_result)
      fprintf (stderr, "FAILED: testUnknownPortGet (0) - %u.\n", test_result);
    else if (verbose)
      printf ("PASSED: testUnknownPortGet (0).\n");
    errorCount += test_result;
    test_result += testEmptyGet (0);
    if (test_result)
      fprintf (stderr, "FAILED: testEmptyGet (0) - %u.\n", test_result);
    else if (verbose)
      printf ("PASSED: testEmptyGet (0).\n");
    errorCount += test_result;
    if (MHD_YES == MHD_is_feature_supported (MHD_FEATURE_POLL))
    {
      test_result += testInternalGet (MHD_USE_POLL);
      if (test_result)
        fprintf (stderr, "FAILED: testInternalGet (MHD_USE_POLL) - %u.\n",
                 test_result);
      else if (verbose)
        printf ("PASSED: testInternalGet (MHD_USE_POLL).\n");
      errorCount += test_result;
      test_result += testMultithreadedGet (MHD_USE_POLL);
      if (test_result)
        fprintf (stderr, "FAILED: testMultithreadedGet (MHD_USE_POLL) - %u.\n",
                 test_result);
      else if (verbose)
        printf ("PASSED: testMultithreadedGet (MHD_USE_POLL).\n");
      errorCount += test_result;
      test_result += testMultithreadedPoolGet (MHD_USE_POLL);
      if (test_result)
        fprintf (stderr,
                 "FAILED: testMultithreadedPoolGet (MHD_USE_POLL) - %u.\n",
                 test_result);
      else if (verbose)
        printf ("PASSED: testMultithreadedPoolGet (MHD_USE_POLL).\n");
      errorCount += test_result;
      test_result += testUnknownPortGet (MHD_USE_POLL);
      if (test_result)
        fprintf (stderr, "FAILED: testUnknownPortGet (MHD_USE_POLL) - %u.\n",
                 test_result);
      else if (verbose)
        printf ("PASSED: testUnknownPortGet (MHD_USE_POLL).\n");
      errorCount += test_result;
      test_result += testEmptyGet (MHD_USE_POLL);
      if (test_result)
        fprintf (stderr, "FAILED: testEmptyGet (MHD_USE_POLL) - %u.\n",
                 test_result);
      else if (verbose)
        printf ("PASSED: testEmptyGet (MHD_USE_POLL).\n");
      errorCount += test_result;
    }
    if (MHD_YES == MHD_is_feature_supported (MHD_FEATURE_EPOLL))
    {
      test_result += testInternalGet (MHD_USE_EPOLL);
      if (test_result)
        fprintf (stderr, "FAILED: testInternalGet (MHD_USE_EPOLL) - %u.\n",
                 test_result);
      else if (verbose)
        printf ("PASSED: testInternalGet (MHD_USE_EPOLL).\n");
      errorCount += test_result;
      test_result += testMultithreadedPoolGet (MHD_USE_EPOLL);
      if (test_result)
        fprintf (stderr,
                 "FAILED: testMultithreadedPoolGet (MHD_USE_EPOLL) - %u.\n",
                 test_result);
      else if (verbose)
        printf ("PASSED: testMultithreadedPoolGet (MHD_USE_EPOLL).\n");
      errorCount += test_result;
      test_result += testUnknownPortGet (MHD_USE_EPOLL);
      if (test_result)
        fprintf (stderr, "FAILED: testUnknownPortGet (MHD_USE_EPOLL) - %u.\n",
                 test_result);
      else if (verbose)
        printf ("PASSED: testUnknownPortGet (MHD_USE_EPOLL).\n");
      errorCount += test_result;
      test_result += testEmptyGet (MHD_USE_EPOLL);
      if (test_result)
        fprintf (stderr, "FAILED: testEmptyGet (MHD_USE_EPOLL) - %u.\n",
                 test_result);
      else if (verbose)
        printf ("PASSED: testEmptyGet (MHD_USE_EPOLL).\n");
      errorCount += test_result;
    }
  }
  if (0 != errorCount)
    fprintf (stderr,
             "Error (code: %u)\n",
             errorCount);
  else if (verbose)
    printf ("All tests passed.\n");
  curl_global_cleanup ();
  return (0 == errorCount) ? 0 : 1;       /* 0 == pass */
}