static void
_get_send (GtkCupsRequest *request)
{
GTK_NOTE (PRINTING,
g_print ("CUPS Backend: %s\n", G_STRFUNC));
request->poll_state = GTK_CUPS_HTTP_WRITE;
if (request->data_io == NULL)
{
gtk_cups_result_set_error (request->result,
GTK_CUPS_ERROR_IO,
G_IO_STATUS_ERROR,
G_IO_CHANNEL_ERROR_FAILED,
"Get requires an open io channel");
request->state = GTK_CUPS_GET_DONE;
request->poll_state = GTK_CUPS_HTTP_IDLE;
return;
}
httpClearFields (request->http);
#ifdef HAVE_HTTPGETAUTHSTRING
httpSetField (request->http, HTTP_FIELD_AUTHORIZATION, httpGetAuthString (request->http));
#else
#ifdef HAVE_HTTP_AUTHSTRING
httpSetField (request->http, HTTP_FIELD_AUTHORIZATION, request->http->authstring);
#endif
#endif
if (httpGet (request->http, request->resource))
{
if (httpReconnect (request->http))
{
request->state = GTK_CUPS_GET_DONE;
request->poll_state = GTK_CUPS_HTTP_IDLE;
/* TODO: should add a status or error code for failed GET */
gtk_cups_result_set_error (request->result,
GTK_CUPS_ERROR_GENERAL,
0,
0,
"Failed Get");
}
request->attempts++;
return;
}
if (httpCheck (request->http))
request->last_status = httpUpdate (request->http);
request->attempts = 0;
request->state = GTK_CUPS_GET_CHECK;
request->poll_state = GTK_CUPS_HTTP_READ;
ippSetState (request->ipp_request, IPP_IDLE);
}
gboolean
gtk_cups_request_read_write (GtkCupsRequest *request)
{
if (request->type == GTK_CUPS_POST)
post_states[request->state] (request);
else if (request->type == GTK_CUPS_GET)
get_states[request->state] (request);
if (request->attempts > _GTK_CUPS_MAX_ATTEMPTS &&
request->state != GTK_CUPS_REQUEST_DONE)
{
/* TODO: should add a status or error code for too many failed attempts */
gtk_cups_result_set_error (request->result,
GTK_CUPS_ERROR_GENERAL,
0,
0,
"Too many failed attempts");
request->state = GTK_CUPS_REQUEST_DONE;
request->poll_state = GTK_CUPS_HTTP_IDLE;
}
if (request->state == GTK_CUPS_REQUEST_DONE)
{
request->poll_state = GTK_CUPS_HTTP_IDLE;
return TRUE;
}
else
return FALSE;
}
static void
_get_read_data (GtkCupsRequest *request)
{
char buffer[_GTK_CUPS_MAX_CHUNK_SIZE];
gsize bytes;
gsize bytes_written;
GIOStatus io_status;
GError *error;
GTK_NOTE (PRINTING,
g_print ("CUPS Backend: %s\n", G_STRFUNC));
error = NULL;
request->poll_state = GTK_CUPS_HTTP_READ;
#if HAVE_CUPS_API_1_2
bytes = httpRead2 (request->http, buffer, sizeof (buffer));
#else
bytes = httpRead (request->http, buffer, sizeof (buffer));
#endif /* HAVE_CUPS_API_1_2 */
request->bytes_received += bytes;
GTK_NOTE (PRINTING,
g_print ("CUPS Backend: %" G_GSIZE_FORMAT " bytes read\n", bytes));
io_status =
g_io_channel_write_chars (request->data_io,
buffer,
bytes,
&bytes_written,
&error);
if (io_status == G_IO_STATUS_ERROR)
{
request->state = GTK_CUPS_GET_DONE;
request->poll_state = GTK_CUPS_HTTP_IDLE;
gtk_cups_result_set_error (request->result,
GTK_CUPS_ERROR_IO,
io_status,
error->code,
error->message);
g_error_free (error);
}
/* Stop if we do not expect any more data or EOF was received. */
#if HAVE_CUPS_API_1_2
if (httpGetLength2 (request->http) <= request->bytes_received || bytes == 0)
#else
if (httpGetLength (request->http) <= request->bytes_received || bytes == 0)
#endif /* HAVE_CUPS_API_1_2 */
{
request->state = GTK_CUPS_GET_DONE;
request->poll_state = GTK_CUPS_HTTP_IDLE;
return;
}
}
static void
_post_send (GtkCupsRequest *request)
{
gchar length[255];
struct stat data_info;
GTK_NOTE (PRINTING,
g_print ("CUPS Backend: %s\n", G_STRFUNC));
request->poll_state = GTK_CUPS_HTTP_WRITE;
if (request->data_io != NULL)
{
fstat (g_io_channel_unix_get_fd (request->data_io), &data_info);
sprintf (length, "%lu", (unsigned long) (ippLength (request->ipp_request) + data_info.st_size));
}
else
sprintf (length, "%lu", (unsigned long) ippLength (request->ipp_request));
httpClearFields (request->http);
httpSetField (request->http, HTTP_FIELD_CONTENT_LENGTH, length);
httpSetField (request->http, HTTP_FIELD_CONTENT_TYPE, "application/ipp");
#ifdef HAVE_HTTPGETAUTHSTRING
httpSetField (request->http, HTTP_FIELD_AUTHORIZATION, httpGetAuthString (request->http));
#else
#ifdef HAVE_HTTP_AUTHSTRING
httpSetField (request->http, HTTP_FIELD_AUTHORIZATION, request->http->authstring);
#endif
#endif
if (httpPost (request->http, request->resource))
{
if (httpReconnect (request->http))
{
request->state = GTK_CUPS_POST_DONE;
request->poll_state = GTK_CUPS_HTTP_IDLE;
/* TODO: should add a status or error code for failed post */
gtk_cups_result_set_error (request->result,
GTK_CUPS_ERROR_GENERAL,
0,
0,
"Failed Post");
}
request->attempts++;
return;
}
request->attempts = 0;
request->state = GTK_CUPS_POST_WRITE_REQUEST;
ippSetState (request->ipp_request, IPP_IDLE);
}
static void
_get_read_data (GtkCupsRequest *request)
{
char buffer[_GTK_CUPS_MAX_CHUNK_SIZE];
gsize bytes;
gsize bytes_written;
GIOStatus io_status;
GError *error;
GTK_NOTE (PRINTING,
g_print ("CUPS Backend: %s\n", G_STRFUNC));
error = NULL;
request->poll_state = GTK_CUPS_HTTP_READ;
#if HAVE_CUPS_API_1_2
bytes = httpRead2 (request->http, buffer, sizeof (buffer));
#else
bytes = httpRead (request->http, buffer, sizeof (buffer));
#endif /* HAVE_CUPS_API_1_2 */
GTK_NOTE (PRINTING,
g_print ("CUPS Backend: %i bytes read\n", bytes));
if (bytes == 0)
{
request->state = GTK_CUPS_GET_DONE;
request->poll_state = GTK_CUPS_HTTP_IDLE;
return;
}
io_status =
g_io_channel_write_chars (request->data_io,
buffer,
bytes,
&bytes_written,
&error);
if (io_status == G_IO_STATUS_ERROR)
{
request->state = GTK_CUPS_GET_DONE;
request->poll_state = GTK_CUPS_HTTP_IDLE;
gtk_cups_result_set_error (request->result,
GTK_CUPS_ERROR_IO,
io_status,
error->code,
error->message);
g_error_free (error);
}
}
gboolean
gtk_cups_request_read_write (GtkCupsRequest *request, gboolean connect_only)
{
if (connect_only && request->state != GTK_CUPS_REQUEST_START)
return FALSE;
do
{
if (request->type == GTK_CUPS_POST)
post_states[request->state] (request);
else if (request->type == GTK_CUPS_GET)
get_states[request->state] (request);
if (gtk_cups_result_is_error (request->result))
request->state = GTK_CUPS_REQUEST_DONE;
if (request->attempts > _GTK_CUPS_MAX_ATTEMPTS &&
request->state != GTK_CUPS_REQUEST_DONE)
{
/* TODO: should add a status or error code for too many failed attempts */
gtk_cups_result_set_error (request->result,
GTK_CUPS_ERROR_GENERAL,
0,
0,
"Too many failed attempts");
request->state = GTK_CUPS_REQUEST_DONE;
}
if (request->state == GTK_CUPS_REQUEST_DONE)
{
request->poll_state = GTK_CUPS_HTTP_IDLE;
return TRUE;
}
}
/* We need to recheck using httpCheck if the poll_state is read, because
* Cups has an internal read buffer. And if this buffer is filled, we may
* never get a poll event again. */
while (request->poll_state == GTK_CUPS_HTTP_READ && request->http && httpCheck(request->http));
return FALSE;
}
static void
_get_auth (GtkCupsRequest *request)
{
if (request->password_state == GTK_CUPS_PASSWORD_HAS)
{
if (request->password == NULL)
{
request->state = GTK_CUPS_GET_DONE;
request->poll_state = GTK_CUPS_HTTP_IDLE;
gtk_cups_result_set_error (request->result,
GTK_CUPS_ERROR_AUTH,
0,
1,
"Canceled by user");
}
else
request->state = GTK_CUPS_GET_CHECK;
}
}
static void
_post_write_request (GtkCupsRequest *request)
{
ipp_state_t ipp_status;
GTK_NOTE (PRINTING,
g_print ("CUPS Backend: %s\n", G_STRFUNC));
request->poll_state = GTK_CUPS_HTTP_WRITE;
ipp_status = ippWrite (request->http, request->ipp_request);
if (ipp_status == IPP_ERROR)
{
int cups_error = cupsLastError ();
request->state = GTK_CUPS_POST_DONE;
request->poll_state = GTK_CUPS_HTTP_IDLE;
gtk_cups_result_set_error (request->result,
GTK_CUPS_ERROR_IPP,
ipp_status,
cups_error,
"%s",
ippErrorString (cups_error));
return;
}
if (ipp_status == IPP_DATA)
{
if (request->data_io != NULL)
request->state = GTK_CUPS_POST_WRITE_DATA;
else
{
request->state = GTK_CUPS_POST_CHECK;
request->poll_state = GTK_CUPS_HTTP_READ;
}
}
}
static void
_post_read_response (GtkCupsRequest *request)
{
ipp_state_t ipp_status;
GTK_NOTE (PRINTING,
g_print ("CUPS Backend: %s\n", G_STRFUNC));
request->poll_state = GTK_CUPS_HTTP_READ;
if (request->result->ipp_response == NULL)
request->result->ipp_response = ippNew();
ipp_status = ippRead (request->http,
request->result->ipp_response);
if (ipp_status == IPP_ERROR)
{
int ipp_error = cupsLastError ();
gtk_cups_result_set_error (request->result,
GTK_CUPS_ERROR_IPP,
ipp_status,
ipp_error,
"%s",
ippErrorString (ipp_error));
ippDelete (request->result->ipp_response);
request->result->ipp_response = NULL;
request->state = GTK_CUPS_POST_DONE;
request->poll_state = GTK_CUPS_HTTP_IDLE;
}
else if (ipp_status == IPP_DATA)
{
request->state = GTK_CUPS_POST_DONE;
request->poll_state = GTK_CUPS_HTTP_IDLE;
}
}
static void
_post_check (GtkCupsRequest *request)
{
http_status_t http_status;
http_status = request->last_status;
GTK_NOTE (PRINTING,
g_print ("CUPS Backend: %s - status %i\n", G_STRFUNC, http_status));
request->poll_state = GTK_CUPS_HTTP_READ;
if (http_status == HTTP_CONTINUE)
{
goto again;
}
else if (http_status == HTTP_UNAUTHORIZED)
{
int auth_result = -1;
httpFlush (request->http);
if (request->password_state == GTK_CUPS_PASSWORD_APPLIED)
{
request->poll_state = GTK_CUPS_HTTP_IDLE;
request->password_state = GTK_CUPS_PASSWORD_NOT_VALID;
request->state = GTK_CUPS_POST_AUTH;
request->need_password = TRUE;
return;
}
/* Negotiate */
if (strncmp (httpGetField (request->http, HTTP_FIELD_WWW_AUTHENTICATE), "Negotiate", 9) == 0)
{
auth_result = cupsDoAuthentication (request->http, "POST", request->resource);
}
/* Basic, BasicDigest, Digest and PeerCred */
else
{
if (request->password_state == GTK_CUPS_PASSWORD_NONE)
{
cups_username = request->username;
cupsSetPasswordCB (passwordCB);
/* This call success for PeerCred authentication */
auth_result = cupsDoAuthentication (request->http, "POST", request->resource);
if (auth_result != 0)
{
/* move to AUTH state to let the backend
* ask for a password
*/
request->poll_state = GTK_CUPS_HTTP_IDLE;
request->state = GTK_CUPS_POST_AUTH;
request->need_password = TRUE;
return;
}
}
else
{
cups_password = request->password;
cups_username = request->username;
auth_result = cupsDoAuthentication (request->http, "POST", request->resource);
if (cups_password != NULL)
return;
if (request->password != NULL)
{
memset (request->password, 0, strlen (request->password));
g_free (request->password);
request->password = NULL;
}
request->password_state = GTK_CUPS_PASSWORD_APPLIED;
}
}
if (auth_result ||
httpReconnect (request->http))
{
/* if the password has been used, reset password_state
* so that we ask for a new one next time around
*/
if (cups_password == NULL)
request->password_state = GTK_CUPS_PASSWORD_NONE;
request->state = GTK_CUPS_POST_DONE;
request->poll_state = GTK_CUPS_HTTP_IDLE;
gtk_cups_result_set_error (request->result,
GTK_CUPS_ERROR_AUTH,
0,
0,
"Not authorized");
return;
}
if (request->data_io != NULL)
g_io_channel_seek_position (request->data_io, 0, G_SEEK_SET, NULL);
request->state = GTK_CUPS_POST_CONNECT;
request->poll_state = GTK_CUPS_HTTP_WRITE;
}
else if (http_status == HTTP_ERROR)
{
int error = httpError (request->http);
#ifdef G_OS_WIN32
if (error != WSAENETDOWN && error != WSAENETUNREACH)
#else
if (error != ENETDOWN && error != ENETUNREACH)
#endif /* G_OS_WIN32 */
{
request->attempts++;
goto again;
}
else
{
request->state = GTK_CUPS_POST_DONE;
request->poll_state = GTK_CUPS_HTTP_IDLE;
gtk_cups_result_set_error (request->result,
GTK_CUPS_ERROR_HTTP,
http_status,
error,
"Unknown HTTP error");
return;
}
}
else if (http_status == HTTP_UPGRADE_REQUIRED)
{
/* Flush any error message... */
httpFlush (request->http);
cupsSetEncryption (HTTP_ENCRYPT_REQUIRED);
request->state = GTK_CUPS_POST_CONNECT;
/* Reconnect... */
httpReconnect (request->http);
/* Upgrade with encryption... */
httpEncryption (request->http, HTTP_ENCRYPT_REQUIRED);
request->attempts++;
goto again;
}
else if (http_status != HTTP_OK)
{
int http_errno;
http_errno = httpError (request->http);
if (http_errno == EPIPE)
request->state = GTK_CUPS_POST_CONNECT;
else
{
request->state = GTK_CUPS_POST_DONE;
gtk_cups_result_set_error (request->result,
GTK_CUPS_ERROR_HTTP,
http_status,
http_errno,
"HTTP Error in POST %s",
g_strerror (http_errno));
request->poll_state = GTK_CUPS_HTTP_IDLE;
httpFlush (request->http);
return;
}
request->poll_state = GTK_CUPS_HTTP_IDLE;
request->last_status = HTTP_CONTINUE;
httpFlush (request->http);
if (request->own_http)
httpClose (request->http);
request->http = NULL;
return;
}
else
{
request->state = GTK_CUPS_POST_READ_RESPONSE;
return;
}
again:
http_status = HTTP_CONTINUE;
if (httpCheck (request->http))
http_status = httpUpdate (request->http);
request->last_status = http_status;
}
static void
_post_write_data (GtkCupsRequest *request)
{
gsize bytes;
char buffer[_GTK_CUPS_MAX_CHUNK_SIZE];
http_status_t http_status;
GTK_NOTE (PRINTING,
g_print ("CUPS Backend: %s\n", G_STRFUNC));
request->poll_state = GTK_CUPS_HTTP_WRITE;
if (httpCheck (request->http))
http_status = httpUpdate (request->http);
else
http_status = request->last_status;
request->last_status = http_status;
if (http_status == HTTP_CONTINUE || http_status == HTTP_OK)
{
GIOStatus io_status;
GError *error;
error = NULL;
/* send data */
io_status =
g_io_channel_read_chars (request->data_io,
buffer,
_GTK_CUPS_MAX_CHUNK_SIZE,
&bytes,
&error);
if (io_status == G_IO_STATUS_ERROR)
{
request->state = GTK_CUPS_POST_DONE;
request->poll_state = GTK_CUPS_HTTP_IDLE;
gtk_cups_result_set_error (request->result,
GTK_CUPS_ERROR_IO,
io_status,
error->code,
"Error reading from cache file: %s",
error->message);
g_error_free (error);
return;
}
else if (bytes == 0 && io_status == G_IO_STATUS_EOF)
{
request->state = GTK_CUPS_POST_CHECK;
request->poll_state = GTK_CUPS_HTTP_READ;
request->attempts = 0;
return;
}
if (httpWrite2 (request->http, buffer, bytes) < bytes)
{
int http_errno;
http_errno = httpError (request->http);
request->state = GTK_CUPS_POST_DONE;
request->poll_state = GTK_CUPS_HTTP_IDLE;
gtk_cups_result_set_error (request->result,
GTK_CUPS_ERROR_HTTP,
http_status,
http_errno,
"Error writing to socket in Post %s",
g_strerror (http_errno));
return;
}
}
else if (http_status == HTTP_UNAUTHORIZED)
{
request->state = GTK_CUPS_POST_CHECK;
request->poll_state = GTK_CUPS_HTTP_READ;
request->attempts = 0;
return;
}
else
{
request->attempts++;
}
}
