89 lines
2.8 KiB
Go
89 lines
2.8 KiB
Go
package goupnp
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import (
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"fmt"
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"net/url"
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"github.com/huin/goupnp/soap"
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)
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// ServiceClient is a SOAP client, root device and the service for the SOAP
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// client rolled into one value. The root device, location, and service are
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// intended to be informational. Location can be used to later recreate a
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// ServiceClient with NewServiceClientByURL if the service is still present;
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// bypassing the discovery process.
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type ServiceClient struct {
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SOAPClient *soap.SOAPClient
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RootDevice *RootDevice
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Location *url.URL
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Service *Service
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}
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// NewServiceClients discovers services, and returns clients for them. err will
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// report any error with the discovery process (blocking any device/service
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// discovery), errors reports errors on a per-root-device basis.
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func NewServiceClients(searchTarget string) (clients []ServiceClient, errors []error, err error) {
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var maybeRootDevices []MaybeRootDevice
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if maybeRootDevices, err = DiscoverDevices(searchTarget); err != nil {
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return
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}
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clients = make([]ServiceClient, 0, len(maybeRootDevices))
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for _, maybeRootDevice := range maybeRootDevices {
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if maybeRootDevice.Err != nil {
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errors = append(errors, maybeRootDevice.Err)
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continue
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}
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deviceClients, err := NewServiceClientsFromRootDevice(maybeRootDevice.Root, maybeRootDevice.Location, searchTarget)
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if err != nil {
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errors = append(errors, err)
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continue
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}
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clients = append(clients, deviceClients...)
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}
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return
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}
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// NewServiceClientsByURL creates client(s) for the given service URN, for a
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// root device at the given URL.
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func NewServiceClientsByURL(loc *url.URL, searchTarget string) ([]ServiceClient, error) {
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rootDevice, err := DeviceByURL(loc)
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if err != nil {
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return nil, err
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}
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return NewServiceClientsFromRootDevice(rootDevice, loc, searchTarget)
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}
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// NewServiceClientsFromDevice creates client(s) for the given service URN, in
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// a given root device. The loc parameter is simply assigned to the
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// Location attribute of the returned ServiceClient(s).
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func NewServiceClientsFromRootDevice(rootDevice *RootDevice, loc *url.URL, searchTarget string) ([]ServiceClient, error) {
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device := &rootDevice.Device
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srvs := device.FindService(searchTarget)
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if len(srvs) == 0 {
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return nil, fmt.Errorf("goupnp: service %q not found within device %q (UDN=%q)",
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searchTarget, device.FriendlyName, device.UDN)
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}
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clients := make([]ServiceClient, 0, len(srvs))
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for _, srv := range srvs {
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clients = append(clients, ServiceClient{
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SOAPClient: srv.NewSOAPClient(),
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RootDevice: rootDevice,
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Location: loc,
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Service: srv,
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})
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}
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return clients, nil
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}
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// GetServiceClient returns the ServiceClient itself. This is provided so that the
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// service client attributes can be accessed via an interface method on a
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// wrapping type.
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func (client *ServiceClient) GetServiceClient() *ServiceClient {
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return client
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}
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