gwinhttpfile.c

this is a glib for c language

  child->url.lpszUserName = g_memdup (winhttp_file->url.lpszUserName, winhttp_file->url.dwUserNameLength*2);
  child->url.lpszPassword = g_memdup (winhttp_file->url.lpszPassword, winhttp_file->url.dwPasswordLength*2);
  child->url.lpszUrlPath = wnew_path;
  child->url.dwUrlPathLength = 2*(wcslen (wnew_path)+1);
  child->url.lpszExtraInfo = NULL;
  child->url.dwExtraInfoLength = 0;

  return (GFile *) child;
}

static GFile *
g_winhttp_file_get_child_for_display_name (GFile        *file,
                                           const char   *display_name,
                                           GError      **error)
{
  GFile *new_file;
  char *basename;

  basename = g_locale_from_utf8 (display_name, -1, NULL, NULL, NULL);
  if (basename == NULL)
    {
      g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_FILENAME,
                   _("Invalid filename %s"), display_name);
      return NULL;
    }

  new_file = g_file_get_child (file, basename);
  g_free (basename);

  return new_file;
}

static GFile *
g_winhttp_file_set_display_name (GFile         *file,
                                 const char    *display_name,
                                 GCancellable  *cancellable,
                                 GError       **error)
{
  g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
                       _("Operation not supported"));

  return NULL;
}

static time_t
mktime_utc (SYSTEMTIME *t)
{
  time_t retval;

  static const gint days_before[] =
  {
    0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
  };

  if (t->wMonth < 1 || t->wMonth > 12)
    return (time_t) -1;

  retval = (t->wYear - 1970) * 365;
  retval += (t->wYear - 1968) / 4;
  retval += days_before[t->wMonth-1] + t->wDay - 1;

  if (t->wYear % 4 == 0 && t->wMonth < 3)
    retval -= 1;

  retval = ((((retval * 24) + t->wHour) * 60) + t->wMinute) * 60 + t->wSecond;

  return retval;
}

static GFileInfo *
g_winhttp_file_query_info (GFile                *file,
                           const char           *attributes,
                           GFileQueryInfoFlags   flags,
                           GCancellable         *cancellable,
                           GError              **error)
{
  GWinHttpFile *winhttp_file = G_WINHTTP_FILE (file);
  HINTERNET connection, request;
  const wchar_t *accept_types[] =
    {
      L"*/*",
      NULL,
    };
  GFileInfo *info;
  GFileAttributeMatcher *matcher;
  char *basename;
  wchar_t *content_length;
  wchar_t *content_type;
  SYSTEMTIME last_modified;
  DWORD last_modified_len;

  connection = G_WINHTTP_VFS_GET_CLASS (winhttp_file->vfs)->funcs->pWinHttpConnect
    (G_WINHTTP_VFS (winhttp_file->vfs)->session,
     winhttp_file->url.lpszHostName,
     winhttp_file->url.nPort,
     0);

  if (connection == NULL)
    {
      _g_winhttp_set_error (error, GetLastError (), "HTTP connection");

      return NULL;
    }

  request = G_WINHTTP_VFS_GET_CLASS (winhttp_file->vfs)->funcs->pWinHttpOpenRequest
    (connection,
     L"HEAD",
     winhttp_file->url.lpszUrlPath,
     NULL,
     WINHTTP_NO_REFERER,
     accept_types,
     winhttp_file->url.nScheme == INTERNET_SCHEME_HTTPS ? WINHTTP_FLAG_SECURE : 0);

  if (request == NULL)
    {
      _g_winhttp_set_error (error, GetLastError (), "HEAD request");

      return NULL;
    }

  if (!G_WINHTTP_VFS_GET_CLASS (winhttp_file->vfs)->funcs->pWinHttpSendRequest
      (request,
       NULL, 0,
       NULL, 0,
       0,
       0))
    {
      _g_winhttp_set_error (error, GetLastError (), "HEAD request");

      return NULL;
    }

  if (!_g_winhttp_response (winhttp_file->vfs, request, error, "HEAD request"))
    return NULL;

  matcher = g_file_attribute_matcher_new (attributes);
  info = g_file_info_new ();
  g_file_info_set_attribute_mask (info, matcher);

  basename = g_winhttp_file_get_basename (file);
  g_file_info_set_name (info, basename);
  g_free (basename);

  content_length = NULL;
  if (_g_winhttp_query_header (winhttp_file->vfs,
                               request,
                               "HEAD request",
                               WINHTTP_QUERY_CONTENT_LENGTH,
                               &content_length,
                               NULL))
    {
      gint64 cl;
      int n;

      if (swscanf (content_length, L"%I64d%n", &cl, &n) == 1 &&
          n == wcslen (content_length))
        g_file_info_set_size (info, cl);

      g_free (content_length);
    }

  if (matcher == NULL)
    return info;

  content_type = NULL;
  if (_g_winhttp_query_header (winhttp_file->vfs,
                               request,
                               "HEAD request",
                               WINHTTP_QUERY_CONTENT_TYPE,
                               &content_type,
                               NULL))
    {
      char *ct = g_utf16_to_utf8 (content_type, -1, NULL, NULL, NULL);

      if (ct != NULL)
        {
          char *p = strchr (ct, ';');

          if (p != NULL)
            {
              char *tmp = g_strndup (ct, p - ct);

              g_file_info_set_content_type (info, tmp);
              g_free (tmp);
            }
          else
            g_file_info_set_content_type (info, ct);
        }

      g_free (ct);
    }

  last_modified_len = sizeof (last_modified);
  if (G_WINHTTP_VFS_GET_CLASS (winhttp_file->vfs)->funcs->pWinHttpQueryHeaders
      (request,
       WINHTTP_QUERY_LAST_MODIFIED | WINHTTP_QUERY_FLAG_SYSTEMTIME,
       NULL,
       &last_modified,
       &last_modified_len,
       NULL) &&
      last_modified_len == sizeof (last_modified) &&
      /* Don't bother comparing to the exact Y2038 moment */
      last_modified.wYear >= 1970 &&
      last_modified.wYear < 2038)
    {
      GTimeVal tv;

      tv.tv_sec = mktime_utc (&last_modified);
      tv.tv_usec = last_modified.wMilliseconds * 1000;

      g_file_info_set_modification_time (info, &tv);
    }

  g_file_attribute_matcher_unref (matcher);

  return info;
}

static GFileInputStream *
g_winhttp_file_read (GFile         *file,
                     GCancellable  *cancellable,
                     GError       **error)
{
  GWinHttpFile *winhttp_file = G_WINHTTP_FILE (file);
  HINTERNET connection, request;
  const wchar_t *accept_types[] =
    {
      L"*/*",
      NULL,
    };

  connection = G_WINHTTP_VFS_GET_CLASS (winhttp_file->vfs)->funcs->pWinHttpConnect
    (G_WINHTTP_VFS (winhttp_file->vfs)->session,
     winhttp_file->url.lpszHostName,
     winhttp_file->url.nPort,
     0);

  if (connection == NULL)
    {
      _g_winhttp_set_error (error, GetLastError (), "HTTP connection");

      return NULL;
    }

  request = G_WINHTTP_VFS_GET_CLASS (winhttp_file->vfs)->funcs->pWinHttpOpenRequest
    (connection,
     L"GET",
     winhttp_file->url.lpszUrlPath,
     NULL,
     WINHTTP_NO_REFERER,
     accept_types,
     winhttp_file->url.nScheme == INTERNET_SCHEME_HTTPS ? WINHTTP_FLAG_SECURE : 0);

  if (request == NULL)
    {
      _g_winhttp_set_error (error, GetLastError (), "GET request");

      return NULL;
    }

  return _g_winhttp_file_input_stream_new (winhttp_file, connection, request);
}

static GFileOutputStream *
g_winhttp_file_create (GFile             *file,
                       GFileCreateFlags   flags,
                       GCancellable      *cancellable,
                       GError           **error)
{
  GWinHttpFile *winhttp_file = G_WINHTTP_FILE (file);
  HINTERNET connection;

  connection = G_WINHTTP_VFS_GET_CLASS (winhttp_file->vfs)->funcs->pWinHttpConnect
    (G_WINHTTP_VFS (winhttp_file->vfs)->session,
     winhttp_file->url.lpszHostName,
     winhttp_file->url.nPort,
     0);

  if (connection == NULL)
    {
      _g_winhttp_set_error (error, GetLastError (), "HTTP connection");

      return NULL;
    }

  return _g_winhttp_file_output_stream_new (winhttp_file, connection);
}

#if 0

static GFileOutputStream *
g_winhttp_file_replace (GFile             *file,
                        const char        *etag,
                        gboolean           make_backup,
                        GFileCreateFlags   flags,
                        GCancellable      *cancellable,
                        GError           **error)
{
  /* FIXME: Implement */

  return NULL;
}


static gboolean
g_winhttp_file_delete (GFile         *file,
                       GCancellable  *cancellable,
                       GError       **error)
{
  /* FIXME: Implement */

  return FALSE;
}

static gboolean
g_winhttp_file_make_directory (GFile         *file,
                               GCancellable  *cancellable,
                               GError       **error)
{
  /* FIXME: Implement */

  return FALSE;
}

static gboolean
g_winhttp_file_copy (GFile                  *source,
                     GFile                  *destination,
                     GFileCopyFlags          flags,
                     GCancellable           *cancellable,
                     GFileProgressCallback   progress_callback,
                     gpointer                progress_callback_data,
                     GError                **error)
{
  /* Fall back to default copy?? */
  g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
                       "Copy not supported");

  return FALSE;
}

static gboolean
g_winhttp_file_move (GFile                  *source,
                     GFile                  *destination,
                     GFileCopyFlags          flags,
                     GCancellable           *cancellable,
                     GFileProgressCallback   progress_callback,
                     gpointer                progress_callback_data,
                     GError                **error)
{
  /* FIXME: Implement */

  return FALSE;
}

#endif

static void
g_winhttp_file_file_iface_init (GFileIface *iface)
{
  iface->dup = g_winhttp_file_dup;
  iface->hash = g_winhttp_file_hash;
  iface->equal = g_winhttp_file_equal;
  iface->is_native = g_winhttp_file_is_native;
  iface->has_uri_scheme = g_winhttp_file_has_uri_scheme;
  iface->get_uri_scheme = g_winhttp_file_get_uri_scheme;
  iface->get_basename = g_winhttp_file_get_basename;
  iface->get_path = g_winhttp_file_get_path;
  iface->get_uri = g_winhttp_file_get_uri;
  iface->get_parse_name = g_winhttp_file_get_parse_name;
  iface->get_parent = g_winhttp_file_get_parent;
  iface->prefix_matches = g_winhttp_file_prefix_matches;
  iface->get_relative_path = g_winhttp_file_get_relative_path;
  iface->resolve_relative_path = g_winhttp_file_resolve_relative_path;
  iface->get_child_for_display_name = g_winhttp_file_get_child_for_display_name;
  iface->set_display_name = g_winhttp_file_set_display_name;
  iface->query_info = g_winhttp_file_query_info;
  iface->read_fn = g_winhttp_file_read;
  iface->create = g_winhttp_file_create;
#if 0
  iface->replace = g_winhttp_file_replace;
  iface->delete_file = g_winhttp_file_delete;
  iface->make_directory = g_winhttp_file_make_directory;
  iface->copy = g_winhttp_file_copy;
  iface->move = g_winhttp_file_move;
#endif
}