GUPnPService: GUPnP Reference Manual

## GUPnPService GUPnPService — Class for service implementations. |

## Functions

const char * | gupnp_service_action_get_name ()
GList * | gupnp_service_action_get_locales ()
void | gupnp_service_action_get ()
void | gupnp_service_action_get_valist ()
void | gupnp_service_action_get_value ()
GValue * | gupnp_service_action_get_gvalue ()
GList * | gupnp_service_action_get_values ()
void | gupnp_service_action_set ()
void | gupnp_service_action_set_valist ()
void | gupnp_service_action_set_value ()
void | gupnp_service_action_set_values ()
void | gupnp_service_action_return ()
void | gupnp_service_action_return_error ()
SoupMessage * | gupnp_service_action_get_message ()
guint | gupnp_service_action_get_argument_count ()
void | gupnp_service_notify ()
void | gupnp_service_notify_valist ()
void | gupnp_service_notify_value ()
void | gupnp_service_freeze_notify ()
void | gupnp_service_thaw_notify ()
void | gupnp_service_signals_autoconnect ()

## Properties

GUPnPRootDevice * | root-device | Read / Write / Construct Only

## Signals

void | action-invoked | Has Details
void | notify-failed | Run Last
void | query-variable | Has Details

## Types and Values

struct | GUPnPService
| GUPnPServiceAction

## Object Hierarchy

        GBoxed
        ╰── GUPnPServiceAction
        GObject
        ╰── GUPnPServiceInfo
            ╰── GUPnPService

## Description

GUPnPService allows for handling incoming actions and state variable notification. GUPnPService implements the GUPnPServiceInfo interface.

## Functions

### gupnp_service_action_get_name ()

    const char *
    gupnp_service_action_get_name (GUPnPServiceAction *action);

Get the name of `action` .

#### Parameters

action | A GUPnPServiceAction |

#### Returns

The name of `action`

### gupnp_service_action_get_locales ()

    GList *
    gupnp_service_action_get_locales (GUPnPServiceAction *action);

Get an ordered (preferred first) GList of locales preferred by the client. Free list and elements after use.

#### Parameters

action | A GUPnPServiceAction |

#### Returns

A GList of char* locale names.

[element-type utf8][transfer full]

### gupnp_service_action_get ()

    void
    gupnp_service_action_get (GUPnPServiceAction *action,
                              ...);

Retrieves the specified action arguments.

#### Parameters

action | A GUPnPServiceAction |
... | tuples of argument name, argument type, and argument value location, terminated with `NULL`. |

### gupnp_service_action_get_valist ()

    void
    gupnp_service_action_get_valist (GUPnPServiceAction *action,
                                     va_list var_args);

See `gupnp_service_action_get()`; this version takes a va_list for use by language bindings.

#### Parameters

action | A GUPnPServiceAction |
var_args | va_list of tuples of argument name, argument type, and argument value location. |

### gupnp_service_action_get_value ()

    void
    gupnp_service_action_get_value (GUPnPServiceAction *action,
                                    const char *argument,
                                    GValue *value);

Retrieves the value of `argument` into `value` .

[skip]

#### Parameters

action | A GUPnPServiceAction |
argument | The name of the argument to retrieve |
value | The GValue to store the value of the argument, initialized to the correct type. | [inout]

### gupnp_service_action_get_gvalue ()

    GValue *
    gupnp_service_action_get_gvalue (GUPnPServiceAction *action,
                                     const char *argument,
                                     GType type);

Retrieves the value of `argument` into a GValue of type `type` and returns it. The method exists only and only to satify PyGI, please use `gupnp_service_action_get_value()` and ignore this if possible.

[rename-to gupnp_service_action_get_value]

#### Parameters

action | A GUPnPServiceAction |
argument | The name of the argument to retrieve |
type | The type of argument to retrieve |

#### Returns

Value as GValue associated with `action` . `g_value_unset()` and `g_slice_free()` it after usage.

[transfer full]

Since: 0.13.3

### gupnp_service_action_get_values ()

    GList *
    gupnp_service_action_get_values (GUPnPServiceAction *action,
                                     GList *arg_names,
                                     GList *arg_types);

A variant of gupnp_service_action_get that uses GList instead of varargs.

#### Parameters

action | A GUPnPServiceAction |
arg_names | (element-type utf8) : A GList of argument names as string |
arg_types | A GList of argument types as GType. | [element-type GType]

#### Returns

The values as GList of GValue. `g_list_free()` the returned list and `g_value_unset()` and `g_slice_free()` each element.

[element-type GValue][transfer full]

Since: 0.13.3

### gupnp_service_action_set ()

    void
    gupnp_service_action_set (GUPnPServiceAction *action,
                              ...);

Sets the specified action return values.

#### Parameters

action | A GUPnPServiceAction |
... | tuples of return value name, return value type, and actual return value, terminated with `NULL`. |

### gupnp_service_action_set_valist ()

    void
    gupnp_service_action_set_valist (GUPnPServiceAction *action,
                                     va_list var_args);

See `gupnp_service_action_set()`; this version takes a va_list for use by language bindings.

#### Parameters

action | A GUPnPServiceAction |
var_args | va_list of tuples of return value name, return value type, and actual return value. |

### gupnp_service_action_set_value ()

    void
    gupnp_service_action_set_value (GUPnPServiceAction *action,
                                    const char *argument,
                                    const GValue *value);

Sets the value of `argument` to `value` .

#### Parameters

action | A GUPnPServiceAction |
argument | The name of the return value to retrieve |
value | The GValue to store the return value |

### gupnp_service_action_set_values ()

    void
    gupnp_service_action_set_values (GUPnPServiceAction *action,
                                     GList *arg_names,
                                     GList *arg_values);

Sets the specified action return values.

#### Parameters

action | A GUPnPServiceAction |
arg_names | A GList of argument names. | [element-type utf8][transfer none]
arg_values | The GList of values (as GValues) that line up with `arg_names` . | [element-type GValue][transfer none]

Since: 0.13.3

### gupnp_service_action_return ()

    void
    gupnp_service_action_return (GUPnPServiceAction *action);

Return succesfully.

#### Parameters

action | A GUPnPServiceAction |

### gupnp_service_action_return_error ()

    void
    gupnp_service_action_return_error (GUPnPServiceAction *action,
                                       guint error_code,
                                       const char *error_description);

Return `error_code` .

#### Parameters

action | A GUPnPServiceAction |
error_code | The error code |
error_description | The error description, or `NULL` if `error_code` is one of GUPNP_CONTROL_ERROR_INVALID_ACTION, GUPNP_CONTROL_ERROR_INVALID_ARGS, GUPNP_CONTROL_ERROR_OUT_OF_SYNC or GUPNP_CONTROL_ERROR_ACTION_FAILED, in which case a description is provided automatically. |

### gupnp_service_action_get_message ()

    SoupMessage *
    gupnp_service_action_get_message (GUPnPServiceAction *action);

Get the SoupMessage associated with `action` . Mainly intended for applications to be able to read HTTP headers received from clients.

#### Parameters

action | A GUPnPServiceAction |

#### Returns

SoupMessage associated with `action` . Unref after using it.

[transfer full]

Since: 0.13.0

### gupnp_service_action_get_argument_count ()

    guint
    gupnp_service_action_get_argument_count
                                   (GUPnPServiceAction *action);

Get the number of IN arguments from the `action` and return it.

#### Parameters

action | A GUPnPServiceAction |

#### Returns

The number of IN arguments from the `action` .

Since: 0.17.0

### gupnp_service_notify ()

    void
    gupnp_service_notify (GUPnPService *service,
                          ...);

Notifies listening clients that the properties listed in `Varargs` have changed to the specified values.

#### Parameters

service | A GUPnPService |
... | Tuples of variable name, variable type, and variable value, terminated with `NULL`. |

### gupnp_service_notify_valist ()

    void
    gupnp_service_notify_valist (GUPnPService *service,
                                 va_list var_args);

See `gupnp_service_notify()`; this version takes a va_list for use by language bindings.

#### Parameters

service | A GUPnPService |
var_args | A va_list of tuples of variable name, variable type, and variable value, terminated with `NULL`. |

### gupnp_service_notify_value ()

    void
    gupnp_service_notify_value (GUPnPService *service,
                                const char *variable,
                                const GValue *value);

Notifies listening clients that `variable` has changed to `value` .

#### Parameters

service | A GUPnPService |
variable | The name of the variable to notify |
value | The value of the variable |

### gupnp_service_freeze_notify ()

    void
    gupnp_service_freeze_notify (GUPnPService *service);

Causes new notifications to be queued up until `gupnp_service_thaw_notify()` is called.

#### Parameters

service | A GUPnPService |

### gupnp_service_thaw_notify ()

    void
    gupnp_service_thaw_notify (GUPnPService *service);

Sends out any pending notifications, and stops queuing of new ones.

#### Parameters

service | A GUPnPService |

### gupnp_service_signals_autoconnect ()

    void
    gupnp_service_signals_autoconnect (GUPnPService *service,
                                       gpointer user_data,
                                       GError **error);

A convenience function that attempts to connect all possible “action-invoked” and “query-variable” signals to appropriate callbacks for the service `service` . It uses service introspection and GModule's introspective features. It is very simillar to `gtk_builder_connect_signals()` except that it attempts to guess the names of the signal handlers on its own.

For this function to do its magic, the application must name the callback functions for “action-invoked” signals by striping the CamelCase off the action names and either prepend "on_" or append "_cb" to them. Same goes for “query-variable” signals, except that "query_" should be prepended to the variable name. For example, callback function for `GetSystemUpdateID` action should be either named as "get_system_update_id_cb" or "on_get_system_update_id" and callback function for the query of "SystemUpdateID" state variable should be named `query_system_update_id_cb` or `on_query_system_update_id`.

This function will not work correctly if GModule is not supported on the platform or introspection is not available for `service`.
This function can not and therefore does not guarantee that the resulting signal connections will be correct as it depends heavily on a particular naming schemes described above.

#### Parameters

service | A GUPnPService |
user_data | the data to pass to each of the callbacks |
error | return location for a GError, or `NULL` |

## Types and Values

### struct GUPnPService

    struct GUPnPService;

This struct contains private data only, and should be accessed using the functions below.

### GUPnPServiceAction

    typedef struct _GUPnPServiceAction GUPnPServiceAction;

Opaque structure for holding in-progress action data.

## Property Details

### The `“root-device”` property

      “root-device”              GUPnPRootDevice *

The containing GUPnPRootDevice.

Flags: Read / Write / Construct Only

## Signal Details

### The `“action-invoked”` signal

    void
    user_function (GUPnPService       *service,
                   GUPnPServiceAction *action,
                   gpointer            user_data)

Emitted whenever an action is invoked. Handler should process `action` and must call either `gupnp_service_action_return()` or `gupnp_service_action_return_error()`.

#### Parameters

service | The GUPnPService that received the signal |
action | The invoked GUPnPServiceAction |
user_data | user data set when the signal handler was connected. |

Flags: Has Details

### The `“notify-failed”` signal

    void
    user_function (GUPnPService *service,
                   gpointer      callback_url,
                   gpointer      reason,
                   gpointer      user_data)

Emitted whenever notification of a client fails.

#### Parameters

service | The GUPnPService that received the signal |
callback_url | A GList of callback URLs. | [type GList][element-type SoupURI]
reason | A pointer to a GError describing why the notify failed. | [type GError]
user_data | user data set when the signal handler was connected. |

Flags: Run Last

### The `“query-variable”` signal

    void
    user_function (GUPnPService *service,
                   gchar        *variable,
                   gpointer      value,
                   gpointer      user_data)

Emitted whenever `service` needs to know the value of `variable` . Handler should fill `value` with the value of `variable` .

#### Parameters

service | The GUPnPService that received the signal |
variable | The variable that is being queried |
value | The location of the GValue of the variable. | [type GValue][inout]
user_data | user data set when the signal handler was connected. |

Flags: Has Details