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;
}
}
ipp_t * /* O - Response or @code NULL@ on HTTP error */
cupsGetResponse(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
const char *resource) /* I - HTTP resource for POST */
{
http_status_t status; /* HTTP status */
ipp_state_t state; /* IPP read state */
ipp_t *response = NULL; /* IPP response */
DEBUG_printf(("cupsGetResponse(http=%p, resource=\"%s\")", http, resource));
/*
* Connect to the default server as needed...
*/
if (!http)
http = _cupsConnect();
if (!http || (http->state != HTTP_STATE_POST_RECV &&
http->state != HTTP_STATE_POST_SEND))
return (NULL);
/*
* Check for an unfinished chunked request...
*/
if (http->data_encoding == HTTP_ENCODING_CHUNKED)
{
/*
* Send a 0-length chunk to finish off the request...
*/
DEBUG_puts("2cupsGetResponse: Finishing chunked POST...");
if (httpWrite2(http, "", 0) < 0)
return (NULL);
}
/*
* Wait for a response from the server...
*/
DEBUG_printf(("2cupsGetResponse: Update loop, http->status=%d...",
http->status));
do
{
status = httpUpdate(http);
}
while (status == HTTP_STATUS_CONTINUE);
DEBUG_printf(("2cupsGetResponse: status=%d", status));
if (status == HTTP_STATUS_OK)
{
/*
* Get the IPP response...
*/
response = ippNew();
while ((state = ippRead(http, response)) != IPP_STATE_DATA)
if (state == IPP_STATE_ERROR)
break;
if (state == IPP_STATE_ERROR)
{
/*
* Flush remaining data and delete the response...
*/
DEBUG_puts("1cupsGetResponse: IPP read error!");
httpFlush(http);
ippDelete(response);
response = NULL;
http->status = status = HTTP_STATUS_ERROR;
http->error = EINVAL;
}
}
else if (status != HTTP_STATUS_ERROR)
{
/*
* Flush any error message...
*/
httpFlush(http);
/*
* Then handle encryption and authentication...
*/
if (status == HTTP_STATUS_UNAUTHORIZED)
{
/*
* See if we can do authentication...
*/
DEBUG_puts("2cupsGetResponse: Need authorization...");
if (!cupsDoAuthentication(http, "POST", resource))
httpReconnect2(http, 30000, NULL);
else
http->status = status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
}
#ifdef HAVE_SSL
else if (status == HTTP_STATUS_UPGRADE_REQUIRED)
{
/*
* Force a reconnect with encryption...
*/
DEBUG_puts("2cupsGetResponse: Need encryption...");
if (!httpReconnect2(http, 30000, NULL))
httpEncryption(http, HTTP_ENCRYPTION_REQUIRED);
}
#endif /* HAVE_SSL */
}
if (response)
{
ipp_attribute_t *attr; /* status-message attribute */
attr = ippFindAttribute(response, "status-message", IPP_TAG_TEXT);
DEBUG_printf(("1cupsGetResponse: status-code=%s, status-message=\"%s\"",
ippErrorString(response->request.status.status_code),
attr ? attr->values[0].string.text : ""));
_cupsSetError(response->request.status.status_code,
attr ? attr->values[0].string.text :
ippErrorString(response->request.status.status_code), 0);
}
return (response);
}
ipp_status_t /* O - Request status - @code IPP_OK@ on success. */
cupsGetDevices(
http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
int timeout, /* I - Timeout in seconds or @code CUPS_TIMEOUT_DEFAULT@ */
const char *include_schemes, /* I - Comma-separated URI schemes to include or @code CUPS_INCLUDE_ALL@ */
const char *exclude_schemes, /* I - Comma-separated URI schemes to exclude or @code CUPS_EXCLUDE_NONE@ */
cups_device_cb_t callback, /* I - Callback function */
void *user_data) /* I - User data pointer */
{
ipp_t *request, /* CUPS-Get-Devices request */
*response; /* CUPS-Get-Devices response */
ipp_attribute_t *attr; /* Current attribute */
const char *device_class, /* device-class value */
*device_id, /* device-id value */
*device_info, /* device-info value */
*device_location, /* device-location value */
*device_make_and_model, /* device-make-and-model value */
*device_uri; /* device-uri value */
int blocking; /* Current blocking-IO mode */
cups_option_t option; /* in/exclude-schemes option */
http_status_t status; /* HTTP status of request */
ipp_state_t state; /* IPP response state */
/*
* Range check input...
*/
DEBUG_printf(("cupsGetDevices(http=%p, timeout=%d, include_schemes=\"%s\", exclude_schemes=\"%s\", callback=%p, user_data=%p)", (void *)http, timeout, include_schemes, exclude_schemes, (void *)callback, user_data));
if (!callback)
return (IPP_STATUS_ERROR_INTERNAL);
if (!http)
http = _cupsConnect();
if (!http)
return (IPP_STATUS_ERROR_SERVICE_UNAVAILABLE);
/*
* Create a CUPS-Get-Devices request...
*/
request = ippNewRequest(IPP_OP_CUPS_GET_DEVICES);
if (timeout > 0)
ippAddInteger(request, IPP_TAG_OPERATION, IPP_TAG_INTEGER, "timeout",
timeout);
if (include_schemes)
{
option.name = "include-schemes";
option.value = (char *)include_schemes;
cupsEncodeOptions2(request, 1, &option, IPP_TAG_OPERATION);
}
if (exclude_schemes)
{
option.name = "exclude-schemes";
option.value = (char *)exclude_schemes;
cupsEncodeOptions2(request, 1, &option, IPP_TAG_OPERATION);
}
/*
* Send the request and do any necessary authentication...
*/
do
{
DEBUG_puts("2cupsGetDevices: Sending request...");
status = cupsSendRequest(http, request, "/", ippLength(request));
DEBUG_puts("2cupsGetDevices: Waiting for response status...");
while (status == HTTP_STATUS_CONTINUE)
status = httpUpdate(http);
if (status != HTTP_STATUS_OK)
{
httpFlush(http);
if (status == HTTP_STATUS_UNAUTHORIZED)
{
/*
* See if we can do authentication...
*/
DEBUG_puts("2cupsGetDevices: Need authorization...");
if (!cupsDoAuthentication(http, "POST", "/"))
httpReconnect2(http, 30000, NULL);
else
{
status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
break;
}
}
#ifdef HAVE_SSL
else if (status == HTTP_STATUS_UPGRADE_REQUIRED)
{
/*
* Force a reconnect with encryption...
*/
DEBUG_puts("2cupsGetDevices: Need encryption...");
if (!httpReconnect2(http, 30000, NULL))
httpEncryption(http, HTTP_ENCRYPTION_REQUIRED);
}
#endif /* HAVE_SSL */
}
}
while (status == HTTP_STATUS_UNAUTHORIZED ||
status == HTTP_STATUS_UPGRADE_REQUIRED);
DEBUG_printf(("2cupsGetDevices: status=%d", status));
ippDelete(request);
if (status != HTTP_STATUS_OK)
{
_cupsSetHTTPError(status);
return (cupsLastError());
}
/*
* Read the response in non-blocking mode...
*/
blocking = httpGetBlocking(http);
httpBlocking(http, 0);
response = ippNew();
device_class = NULL;
device_id = NULL;
device_info = NULL;
device_location = "";
device_make_and_model = NULL;
device_uri = NULL;
attr = NULL;
DEBUG_puts("2cupsGetDevices: Reading response...");
do
{
if ((state = ippRead(http, response)) == IPP_STATE_ERROR)
break;
DEBUG_printf(("2cupsGetDevices: state=%d, response->last=%p", state, (void *)response->last));
if (!response->attrs)
continue;
while (attr != response->last)
{
if (!attr)
attr = response->attrs;
else
attr = attr->next;
DEBUG_printf(("2cupsGetDevices: attr->name=\"%s\", attr->value_tag=%d",
attr->name, attr->value_tag));
if (!attr->name)
{
if (device_class && device_id && device_info && device_make_and_model &&
device_uri)
(*callback)(device_class, device_id, device_info,
device_make_and_model, device_uri, device_location,
user_data);
device_class = NULL;
device_id = NULL;
device_info = NULL;
device_location = "";
device_make_and_model = NULL;
device_uri = NULL;
}
else if (!strcmp(attr->name, "device-class") &&
attr->value_tag == IPP_TAG_KEYWORD)
device_class = attr->values[0].string.text;
else if (!strcmp(attr->name, "device-id") &&
attr->value_tag == IPP_TAG_TEXT)
device_id = attr->values[0].string.text;
else if (!strcmp(attr->name, "device-info") &&
attr->value_tag == IPP_TAG_TEXT)
device_info = attr->values[0].string.text;
else if (!strcmp(attr->name, "device-location") &&
attr->value_tag == IPP_TAG_TEXT)
device_location = attr->values[0].string.text;
else if (!strcmp(attr->name, "device-make-and-model") &&
attr->value_tag == IPP_TAG_TEXT)
device_make_and_model = attr->values[0].string.text;
else if (!strcmp(attr->name, "device-uri") &&
attr->value_tag == IPP_TAG_URI)
device_uri = attr->values[0].string.text;
}
}
while (state != IPP_STATE_DATA);
DEBUG_printf(("2cupsGetDevices: state=%d, response->last=%p", state, (void *)response->last));
if (device_class && device_id && device_info && device_make_and_model &&
device_uri)
(*callback)(device_class, device_id, device_info,
device_make_and_model, device_uri, device_location, user_data);
/*
* Set the IPP status and return...
*/
httpBlocking(http, blocking);
httpFlush(http);
if (status == HTTP_STATUS_ERROR)
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(http->error), 0);
else
{
attr = ippFindAttribute(response, "status-message", IPP_TAG_TEXT);
DEBUG_printf(("cupsGetDevices: status-code=%s, status-message=\"%s\"",
ippErrorString(response->request.status.status_code),
attr ? attr->values[0].string.text : ""));
_cupsSetError(response->request.status.status_code,
attr ? attr->values[0].string.text :
ippErrorString(response->request.status.status_code), 0);
}
ippDelete(response);
return (cupsLastError());
}
