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// This file contains XML structures for communicating with UPnP devices.
package goupnp
import (
"encoding/xml"
"errors"
"fmt"
"net/url"
"github.com/huin/goupnp/scpd"
"github.com/huin/goupnp/soap"
)
const (
DeviceXMLNamespace = "urn:schemas-upnp-org:device-1-0"
)
// RootDevice is the device description as described by section 2.3 "Device
// description" in
// http://upnp.org/specs/arch/UPnP-arch-DeviceArchitecture-v1.1.pdf
type RootDevice struct {
XMLName xml.Name `xml:"root"`
SpecVersion SpecVersion `xml:"specVersion"`
URLBase url.URL `xml:"-"`
URLBaseStr string `xml:"URLBase"`
Device Device `xml:"device"`
}
// SetURLBase sets the URLBase for the RootDevice and its underlying components.
func (root *RootDevice) SetURLBase(urlBase *url.URL) {
root.URLBase = *urlBase
root.URLBaseStr = urlBase.String()
root.Device.SetURLBase(urlBase)
}
// SpecVersion is part of a RootDevice, describes the version of the
// specification that the data adheres to.
type SpecVersion struct {
Major int32 `xml:"major"`
Minor int32 `xml:"minor"`
}
// Device is a UPnP device. It can have child devices.
type Device struct {
DeviceType string `xml:"deviceType"`
FriendlyName string `xml:"friendlyName"`
Manufacturer string `xml:"manufacturer"`
ManufacturerURL URLField `xml:"manufacturerURL"`
ModelDescription string `xml:"modelDescription"`
ModelName string `xml:"modelName"`
ModelNumber string `xml:"modelNumber"`
ModelURL URLField `xml:"modelURL"`
SerialNumber string `xml:"serialNumber"`
UDN string `xml:"UDN"`
UPC string `xml:"UPC,omitempty"`
Icons []Icon `xml:"iconList>icon,omitempty"`
Services []Service `xml:"serviceList>service,omitempty"`
Devices []Device `xml:"deviceList>device,omitempty"`
// Extra observed elements:
PresentationURL URLField `xml:"presentationURL"`
}
// VisitDevices calls visitor for the device, and all its descendent devices.
func (device *Device) VisitDevices(visitor func(*Device)) {
visitor(device)
for i := range device.Devices {
device.Devices[i].VisitDevices(visitor)
}
}
// VisitServices calls visitor for all Services under the device and all its
// descendent devices.
func (device *Device) VisitServices(visitor func(*Service)) {
device.VisitDevices(func(d *Device) {
for i := range d.Services {
visitor(&d.Services[i])
}
})
}
// FindService finds all (if any) Services under the device and its descendents
// that have the given ServiceType.
func (device *Device) FindService(serviceType string) []*Service {
var services []*Service
device.VisitServices(func(s *Service) {
if s.ServiceType == serviceType {
services = append(services, s)
}
})
return services
}
// SetURLBase sets the URLBase for the Device and its underlying components.
func (device *Device) SetURLBase(urlBase *url.URL) {
device.ManufacturerURL.SetURLBase(urlBase)
device.ModelURL.SetURLBase(urlBase)
device.PresentationURL.SetURLBase(urlBase)
for i := range device.Icons {
device.Icons[i].SetURLBase(urlBase)
}
for i := range device.Services {
device.Services[i].SetURLBase(urlBase)
}
for i := range device.Devices {
device.Devices[i].SetURLBase(urlBase)
}
}
func (device *Device) String() string {
return fmt.Sprintf("Device ID %s : %s (%s)", device.UDN, device.DeviceType, device.FriendlyName)
}
// Icon is a representative image that a device might include in its
// description.
type Icon struct {
Mimetype string `xml:"mimetype"`
Width int32 `xml:"width"`
Height int32 `xml:"height"`
Depth int32 `xml:"depth"`
URL URLField `xml:"url"`
}
// SetURLBase sets the URLBase for the Icon.
func (icon *Icon) SetURLBase(url *url.URL) {
icon.URL.SetURLBase(url)
}
// Service is a service provided by a UPnP Device.
type Service struct {
ServiceType string `xml:"serviceType"`
ServiceId string `xml:"serviceId"`
SCPDURL URLField `xml:"SCPDURL"`
ControlURL URLField `xml:"controlURL"`
EventSubURL URLField `xml:"eventSubURL"`
}
// SetURLBase sets the URLBase for the Service.
func (srv *Service) SetURLBase(urlBase *url.URL) {
srv.SCPDURL.SetURLBase(urlBase)
srv.ControlURL.SetURLBase(urlBase)
srv.EventSubURL.SetURLBase(urlBase)
}
func (srv *Service) String() string {
return fmt.Sprintf("Service ID %s : %s", srv.ServiceId, srv.ServiceType)
}
// RequestSCDP requests the SCPD (soap actions and state variables description)
// for the service.
func (srv *Service) RequestSCDP() (*scpd.SCPD, error) {
if !srv.SCPDURL.Ok {
return nil, errors.New("bad/missing SCPD URL, or no URLBase has been set")
}
s := new(scpd.SCPD)
if err := requestXml(srv.SCPDURL.URL.String(), scpd.SCPDXMLNamespace, s); err != nil {
return nil, err
}
return s, nil
}
func (srv *Service) NewSOAPClient() *soap.SOAPClient {
return soap.NewSOAPClient(srv.ControlURL.URL)
}
// URLField is a URL that is part of a device description.
type URLField struct {
URL url.URL `xml:"-"`
Ok bool `xml:"-"`
Str string `xml:",chardata"`
}
func (uf *URLField) SetURLBase(urlBase *url.URL) {
refUrl, err := url.Parse(uf.Str)
if err != nil {
uf.URL = url.URL{}
uf.Ok = false
return
}
uf.URL = *urlBase.ResolveReference(refUrl)
uf.Ok = true
}
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