/*
     This file is part of libmicrohttpd
     Copyright (C) 2007, 2008 Christian Grothoff

     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_long_header.c
 * @brief  Testcase for libmicrohttpd handling of very long headers
 * @author Christian Grothoff
 */

#include "MHD_config.h"
#include "platform.h"
#include <curl/curl.h>
#include <microhttpd.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#ifndef WINDOWS
#include <unistd.h>
#endif

#include "socat.c"

/**
 * We will set the memory available per connection to
 * half of this value, so the actual value does not have
 * to be big at all...
 */
#define VERY_LONG (1024 * 10)

static int oneone;

static enum MHD_Result
apc_all (void *cls, const struct sockaddr *addr, socklen_t addrlen)
{
  (void) cls; (void) addr; (void) addrlen;   /* Unused. Silent compiler warning. */
  return MHD_YES;
}


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

static size_t
copyBuffer (void *ptr, size_t size, size_t nmemb, void *ctx)
{
  (void) ptr; (void) ctx;  /* Unused. Silent compiler warning. */
  return size * nmemb;
}


static enum MHD_Result
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)
{
  const char *me = cls;
  struct MHD_Response *response;
  enum MHD_Result ret;
  (void) version; (void) upload_data;      /* Unused. Silent compiler warning. */
  (void) upload_data_size; (void) req_cls; /* Unused. Silent compiler warning. */

  if (NULL == url)
    fprintf (stderr, "The \"url\" parameter is NULL.\n");
  if (NULL == method)
    fprintf (stderr, "The \"method\" parameter is NULL.\n");
  if (NULL == version)
    fprintf (stderr, "The \"version\" parameter is NULL.\n");
  if (NULL == upload_data_size)
    fprintf (stderr, "The \"upload_data_size\" parameter is NULL.\n");
  if ((0 != *upload_data_size) && (NULL == upload_data))
    fprintf (stderr, "Upload data is NULL with non-zero size.\n");
  if (0 != strcmp (me, method))
    return MHD_NO;              /* unexpected method */
  response = MHD_create_response_from_buffer (strlen (url),
                                              (void *) url,
                                              MHD_RESPMEM_MUST_COPY);
  ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
  MHD_destroy_response (response);
  return ret;
}


static unsigned int
testLongUrlGet ()
{
  struct MHD_Daemon *d;
  CURL *c;
  char buf[2048];
  struct CBC cbc;
  char *url;
  int i;

  cbc.buf = buf;
  cbc.size = 2048;
  cbc.pos = 0;
  d =
    MHD_start_daemon (MHD_USE_INTERNAL_POLLING_THREAD /* | MHD_USE_ERROR_LOG */,
                      11080,
                      &apc_all,
                      NULL,
                      &ahc_echo,
                      "GET",
                      MHD_OPTION_CONNECTION_MEMORY_LIMIT,
                      (size_t) (VERY_LONG / 2), MHD_OPTION_END);

  if (d == NULL)
    return 1;
  zzuf_socat_start ();
  for (i = 0; i < LOOP_COUNT; i++)
  {
    fprintf (stderr, ".");

    c = curl_easy_init ();
    url = malloc (VERY_LONG);
    if (NULL == url)
    {
      zzuf_socat_stop ();
      return 1;
    }
    memset (url, 'a', VERY_LONG);
    url[VERY_LONG - 1] = '\0';
    memcpy (url, "http://127.0.0.1:11081/",
            strlen ("http://127.0.0.1:11081/"));
    curl_easy_setopt (c, CURLOPT_URL, url);
    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_MS, CURL_TIMEOUT);
    curl_easy_setopt (c, CURLOPT_CONNECTTIMEOUT_MS, CURL_TIMEOUT);
    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);
    curl_easy_perform (c);
    curl_easy_cleanup (c);
    free (url);
  }
  fprintf (stderr, "\n");
  zzuf_socat_stop ();

  MHD_stop_daemon (d);
  return 0;
}


static unsigned int
testLongHeaderGet ()
{
  struct MHD_Daemon *d;
  CURL *c;
  char buf[2048];
  struct CBC cbc;
  char *url;
  struct curl_slist *header = NULL;
  int i;

  cbc.buf = buf;
  cbc.size = 2048;
  cbc.pos = 0;
  d =
    MHD_start_daemon (MHD_USE_INTERNAL_POLLING_THREAD /* | MHD_USE_ERROR_LOG */,
                      11080,
                      &apc_all,
                      NULL,
                      &ahc_echo,
                      "GET",
                      MHD_OPTION_CONNECTION_MEMORY_LIMIT,
                      (size_t) (VERY_LONG / 2), MHD_OPTION_END);
  if (d == NULL)
    return 16;
  zzuf_socat_start ();
  for (i = 0; i < LOOP_COUNT; i++)
  {
    fprintf (stderr, ".");
    c = curl_easy_init ();
    url = malloc (VERY_LONG);
    if (NULL == url)
    {
      zzuf_socat_stop ();
      curl_easy_cleanup (c);
      return 16;
    }
    memset (url, 'a', VERY_LONG);
    url[VERY_LONG - 1] = '\0';
    url[VERY_LONG / 2] = ':';
    url[VERY_LONG / 2 + 1] = ' ';
    header = curl_slist_append (header, url);

    curl_easy_setopt (c, CURLOPT_HTTPHEADER, header);
    curl_easy_setopt (c, CURLOPT_URL, "http://127.0.0.1:11081/hello_world");
    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_MS, CURL_TIMEOUT);
    curl_easy_setopt (c, CURLOPT_CONNECTTIMEOUT_MS, CURL_TIMEOUT);
    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);
    curl_easy_perform (c);
    curl_slist_free_all (header);
    header = NULL;
    curl_easy_cleanup (c);
    free (url);
  }
  fprintf (stderr, "\n");
  zzuf_socat_stop ();

  MHD_stop_daemon (d);
  return 0;
}


int
main (int argc, char *const *argv)
{
  unsigned int errorCount = 0;
  const char *sl;
  (void) argc;   /* Unused. Silent compiler warning. */

  sl = strrchr (argv[0], (int) '/');
  oneone = (NULL != sl) ? (NULL != strstr (sl, "11")) : 0;
  if (0 != curl_global_init (CURL_GLOBAL_WIN32))
    return 2;
  errorCount += testLongUrlGet ();
  errorCount += testLongHeaderGet ();
  if (errorCount != 0)
    fprintf (stderr, "Error (code: %u)\n", errorCount);
  curl_global_cleanup ();
  return (0 == errorCount) ? 0 : 1;       /* 0 == pass */
}