e_backend_get_online ()

gboolean
e_backend_get_online (EBackend *backend);

Returns the online state of backend : TRUE if backend is online, FALSE if offline.

If the “connectable” property is non-NULL, the backend will automatically determine whether the network service should be reachable, and hence whether the backend is “online”. But subclasses may override the online state if, for example, a connection attempt fails.

Since: 3.4

e_backend_set_online ()

void
e_backend_set_online (EBackend *backend,
                      gboolean online);

Sets the online state of backend : TRUE if backend is online, FALSE if offline.

If the “connectable” property is non-NULL, the backend will automatically determine whether the network service should be reachable, and hence whether the backend is “online”. But subclasses may override the online state if, for example, a connection attempt fails.

Since: 3.4

e_backend_ensure_online_state_updated ()

void
e_backend_ensure_online_state_updated (EBackend *backend,
                                       GCancellable *cancellable);

Makes sure that the "online" property is updated, that is, if there is any destination reachability test pending, it'll be done immediately and the only state will be updated as well.

Since: 3.18

e_backend_get_source ()

ESource *
e_backend_get_source (EBackend *backend);

Returns the ESource to which backend is paired.

Since: 3.4

e_backend_ref_connectable ()

GSocketConnectable *
e_backend_ref_connectable (EBackend *backend);

Returns the socket endpoint for the network service to which backend is a client, or NULL if backend does not use network sockets.

The initial value of the “connectable” property is derived from the ESourceAuthentication extension of the backend 's “source” property, if the extension is present.

The returned GSocketConnectable is referenced for thread-safety and must be unreferenced with g_object_unref() when finished with it.

Since: 3.8

e_backend_set_connectable ()

void
e_backend_set_connectable (EBackend *backend,
                           GSocketConnectable *connectable);

Sets the socket endpoint for the network service to which backend is a client. This can be NULL if backend does not use network sockets.

The initial value of the “connectable” property is derived from the ESourceAuthentication extension of the backend 's “source” property, if the extension is present.

Since: 3.8

e_backend_ref_main_context ()

GMainContext *
e_backend_ref_main_context (EBackend *backend);

Returns the GMainContext on which event sources for backend are to be attached.

The returned GMainContext is referenced for thread-safety and must be unreferenced with g_main_context_unref() when finished with it.

Since: 3.8

e_backend_get_user_prompter ()

struct _EUserPrompter *
e_backend_get_user_prompter (EBackend *backend);

Gets an instance of EUserPrompter, associated with this backend .

The returned instance is owned by the backend .

Since: 3.8

e_backend_trust_prompt_sync ()

ETrustPromptResponse
e_backend_trust_prompt_sync (EBackend *backend,
                             const ENamedParameters *parameters,
                             GCancellable *cancellable,
                             GError **error);

Asks a user a trust prompt with given parameters , and returns what user responded. This blocks until the response is delivered.

Since: 3.8

e_backend_trust_prompt ()

void
e_backend_trust_prompt (EBackend *backend,
                        const ENamedParameters *parameters,
                        GCancellable *cancellable,
                        GAsyncReadyCallback callback,
                        gpointer user_data);

Initiates a user trust prompt with given parameters .

When the operation is finished, callback will be called. You can then call e_backend_trust_prompt_finish() to get the result of the operation.

Since: 3.8

e_backend_trust_prompt_finish ()

ETrustPromptResponse
e_backend_trust_prompt_finish (EBackend *backend,
                               GAsyncResult *result,
                               GError **error);

Finishes the operation started with e_backend_trust_prompt(). If an error occurred, the function will set error and return E_TRUST_PROMPT_RESPONSE_UNKNOWN.

Since: 3.8

e_backend_get_destination_address ()

gboolean
e_backend_get_destination_address (EBackend *backend,
                                   gchar **host,
                                   guint16 *port);

Provides destination server host name and port to which the backend connects. This is used to determine required connection point for e_backend_destination_is_reachable(). The host is a newly allocated string, which will be freed with g_free(). When backend sets both host and port , then it should return TRUE, indicating it's a remote backend. Default implementation returns FALSE, which is treated like the backend is local, no checking for server reachability is possible.

Since: 3.8

e_backend_is_destination_reachable ()

gboolean
e_backend_is_destination_reachable (EBackend *backend,
                                    GCancellable *cancellable,
                                    GError **error);

Checks whether the backend 's destination server, as returned by e_backend_get_destination_address(), is reachable. If the e_backend_get_destination_address() returns FALSE, this function returns TRUE, meaning the destination is always reachable. This uses GNetworkMonitor's g_network_monitor_can_reach() for reachability tests.

Since: 3.8

e_backend_prepare_shutdown ()

void
e_backend_prepare_shutdown (EBackend *backend);

Let's the backend know that it'll be shut down shortly, no client connects to it anymore. The backend can free any resources which reference it, for example the opened views.

Since: 3.16

e_backend_credentials_required ()

void
e_backend_credentials_required (EBackend *backend,
                                ESourceCredentialsReason reason,
                                const gchar *certificate_pem,
                                GTlsCertificateFlags certificate_errors,
                                const GError *op_error,
                                GCancellable *cancellable,
                                GAsyncReadyCallback callback,
                                gpointer user_data);

Asynchronously calls the e_backend_credentials_required_sync() on the backend , to inform clients that credentials are required.

When the operation is finished, callback will be called. You can then call e_backend_credentials_required_finish() to get the result of the operation.

Since: 3.16

e_backend_credentials_required_finish ()

gboolean
e_backend_credentials_required_finish (EBackend *backend,
                                       GAsyncResult *result,
                                       GError **error);

Finishes the operation started with e_backend_credentials_required().

If an error occurs, the function sets error and returns FALSE.

Since: 3.16

e_backend_credentials_required_sync ()

gboolean
e_backend_credentials_required_sync (EBackend *backend,
                                     ESourceCredentialsReason reason,
                                     const gchar *certificate_pem,
                                     GTlsCertificateFlags certificate_errors,
                                     const GError *op_error,
                                     GCancellable *cancellable,
                                     GError **error);

Synchronously lets the clients know that the backned requires credentials to be properly opened. It's a proxy function for e_source_invoke_credentials_required_sync(), where can be found more information about actual parameters meaning.

The provided credentials are received through EBackend::authenticate_sync() method asynchronously.

If an error occurs, the function sets error and returns FALSE.

Since: 3.16

e_backend_schedule_authenticate ()

void
e_backend_schedule_authenticate (EBackend *backend,
                                 const ENamedParameters *credentials);

Schedules a new authenticate session, cancelling any previously run. This is usually done automatically, when an 'authenticate' signal is received for the associated ESource. With NULL credentials an attempt without it is run.

Since: 3.16

e_backend_schedule_credentials_required ()

void
e_backend_schedule_credentials_required
                               (EBackend *backend,
                                ESourceCredentialsReason reason,
                                const gchar *certificate_pem,
                                GTlsCertificateFlags certificate_errors,
                                const GError *op_error,
                                GCancellable *cancellable,
                                const gchar *who_calls);

Asynchronously invokes e_backend_credentials_required(), but installs its own callback which only prints a runtime warning on the console when the call fails. The who_calls is a prefix of the console message. This is useful when the caller just wants to start the operation without having actual place where to show the operation result.

Since: 3.16

e_backend_ensure_source_status_connected ()

void
e_backend_ensure_source_status_connected
                               (EBackend *backend);

Makes sure that the associated ESource::connection-status is connected. This is useful in cases when the backend can connect to the destination without invoking EBackend::authenticate_sync, possibly through e_backend_schedule_authenticate().

Since: 3.18

struct EBackend

struct EBackend {
};

Contains only private data that should be read and manipulated using the functions below.

Since: 3.4

struct EBackendClass

struct EBackendClass {
	/* Methods */
	gboolean (*get_destination_address)
						(EBackend *backend,
						 gchar **host,
						 guint16 *port);
	void		(*prepare_shutdown) (EBackend *backend);

	ESourceAuthenticationResult
			(*authenticate_sync) (EBackend *backend,
						 const ENamedParameters *credentials,
						 gchar **out_certificate_pem,
						 GTlsCertificateFlags *out_certificate_errors,
						 GCancellable *cancellable,
						 GError **error);
};

Base class structure for the EBackend class

Since: 3.4