goupnp

README

goupnp is a UPnP client library for Go

Installation

Run go get -u github.com/huin/goupnp.

Documentation

All doc links below are for .

Supported DCPs (you probably want to start with one of these):

• av1 - Client for UPnP Device Control Protocol MediaServer v1 and MediaRenderer v1.
• internetgateway1 - Client for UPnP Device Control Protocol Internet Gateway Device v1.
• internetgateway2 - Client for UPnP Device Control Protocol Internet Gateway Device v2.

Core components:

• (goupnp) core library - contains datastructures and utilities typically used by the implemented DCPs.
• httpu HTTPU implementation, underlies SSDP.
• ssdp SSDP client implementation (simple service discovery protocol) - used to discover UPnP services on a network.
• soap SOAP client implementation (simple object access protocol) - used to communicate with discovered services.

Regenerating dcps generated source code:

1. Install gotasks: go get -u github.com/jingweno/gotask
2. Change to the gotasks directory: cd gotasks
3. Run specgen task: gotask specgen

Supporting additional UPnP devices and services:

Supporting additional services is, in the trivial case, simply a matter of adding the service to the dcpMetadata whitelist in gotasks/specgen_task.go, regenerating the source code (see above), and committing that source code.

However, it would be helpful if anyone needing such a service could test the service against the service they have, and then reporting any trouble encountered as an issue on this project. If it just works, then please report at least minimal working functionality as an issue, and optionally contribute the metadata upstream.

Documentation

Overview

goupnp is an implementation of a client for various UPnP services.

For most uses, it is recommended to use the code-generated packages under github.com/huin/goupnp/dcps. Example use is shown at http://godoc.org/github.com/huin/goupnp/example

A commonly used client is internetgateway1.WANPPPConnection1: http://godoc.org/github.com/huin/goupnp/dcps/internetgateway1#WANPPPConnection1

Currently only a couple of schemas have code generated for them from the UPnP example XML specifications. Not all methods will work on these clients, because the generated stubs contain the full set of specified methods from the XML specifications, and the discovered services will likely support a subset of those methods.

Index

• Constants
• type ContextError
  • func (err ContextError) Error() string
• type Device
  • func (device *Device) FindService(serviceType string) []*Service
  • func (device *Device) SetURLBase(urlBase *url.URL)
  • func (device *Device) String() string
  • func (device *Device) VisitDevices(visitor func(*Device))
  • func (device *Device) VisitServices(visitor func(*Service))
• type Icon
  • func (icon *Icon) SetURLBase(url *url.URL)
• type MaybeRootDevice
  • func DiscoverDevices(searchTarget string) ([]MaybeRootDevice, error)
• type RootDevice
  • func DeviceByURL(loc *url.URL) (*RootDevice, error)
  • func (root *RootDevice) SetURLBase(urlBase *url.URL)
• type Service
  • func (srv *Service) NewSOAPClient() *soap.SOAPClient
  • func (srv *Service) RequestSCDP() (*scpd.SCPD, error)
  • func (srv *Service) SetURLBase(urlBase *url.URL)
  • func (srv *Service) String() string
• type ServiceClient
  • func NewServiceClients(searchTarget string) (clients []ServiceClient, errors []error, err error)
  • func NewServiceClientsByURL(loc *url.URL, searchTarget string) ([]ServiceClient, error)
  • func NewServiceClientsFromRootDevice(rootDevice *RootDevice, loc *url.URL, searchTarget string) ([]ServiceClient, error)
  • func (client *ServiceClient) GetServiceClient() *ServiceClient
• type SpecVersion
• type URLField
  • func (uf *URLField) SetURLBase(urlBase *url.URL)

Constants

const (
	DeviceXMLNamespace = "urn:schemas-upnp-org:device-1-0"
)

Types

type ContextError

type ContextError struct {
	Context string
	Err     error
}

ContextError is an error that wraps an error with some context information.

func (ContextError) Error

func (err ContextError) Error() string

type Device

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"`
}

Device is a UPnP device. It can have child devices.

func (*Device) FindService

func (device *Device) FindService(serviceType string) []*Service

FindService finds all (if any) Services under the device and its descendents that have the given ServiceType.

func (*Device) SetURLBase

func (device *Device) SetURLBase(urlBase *url.URL)

SetURLBase sets the URLBase for the Device and its underlying components.

func (*Device) String

func (device *Device) String() string

func (*Device) VisitDevices

func (device *Device) VisitDevices(visitor func(*Device))

VisitDevices calls visitor for the device, and all its descendent devices.

func (*Device) VisitServices

func (device *Device) VisitServices(visitor func(*Service))

VisitServices calls visitor for all Services under the device and all its descendent devices.

type Icon

type Icon struct {
	Mimetype string   `xml:"mimetype"`
	Width    int32    `xml:"width"`
	Height   int32    `xml:"height"`
	Depth    int32    `xml:"depth"`
	URL      URLField `xml:"url"`
}

Icon is a representative image that a device might include in its description.

func (*Icon) SetURLBase

func (icon *Icon) SetURLBase(url *url.URL)

SetURLBase sets the URLBase for the Icon.

type MaybeRootDevice

type MaybeRootDevice struct {
	// Set iff Err == nil.
	Root *RootDevice

	// The location the device was discovered at. This can be used with
	// DeviceByURL, assuming the device is still present. A location represents
	// the discovery of a device, regardless of if there was an error probing it.
	Location *url.URL

	// Any error encountered probing a discovered device.
	Err error
}

MaybeRootDevice contains either a RootDevice or an error.

func DiscoverDevices

func DiscoverDevices(searchTarget string) ([]MaybeRootDevice, error)

DiscoverDevices attempts to find targets of the given type. This is typically the entry-point for this package. searchTarget is typically a URN in the form "urn:schemas-upnp-org:device:..." or "urn:schemas-upnp-org:service:...". A single error is returned for errors while attempting to send the query. An error or RootDevice is returned for each discovered RootDevice.

type RootDevice

type RootDevice struct {
	XMLName     xml.Name    `xml:"root"`
	SpecVersion SpecVersion `xml:"specVersion"`
	URLBase     url.URL     `xml:"-"`
	URLBaseStr  string      `xml:"URLBase"`
	Device      Device      `xml:"device"`
}

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

func DeviceByURL

func DeviceByURL(loc *url.URL) (*RootDevice, error)

func (*RootDevice) SetURLBase

func (root *RootDevice) SetURLBase(urlBase *url.URL)

SetURLBase sets the URLBase for the RootDevice and its underlying components.

type Service

type Service struct {
	ServiceType string   `xml:"serviceType"`
	ServiceId   string   `xml:"serviceId"`
	SCPDURL     URLField `xml:"SCPDURL"`
	ControlURL  URLField `xml:"controlURL"`
	EventSubURL URLField `xml:"eventSubURL"`
}

Service is a service provided by a UPnP Device.

func (*Service) NewSOAPClient

func (srv *Service) NewSOAPClient() *soap.SOAPClient

func (*Service) RequestSCDP

func (srv *Service) RequestSCDP() (*scpd.SCPD, error)

RequestSCDP requests the SCPD (soap actions and state variables description) for the service.

func (*Service) SetURLBase

func (srv *Service) SetURLBase(urlBase *url.URL)

SetURLBase sets the URLBase for the Service.

func (*Service) String

func (srv *Service) String() string

type ServiceClient

type ServiceClient struct {
	SOAPClient *soap.SOAPClient
	RootDevice *RootDevice
	Location   *url.URL
	Service    *Service
}

ServiceClient is a SOAP client, root device and the service for the SOAP client rolled into one value. The root device, location, and service are intended to be informational. Location can be used to later recreate a ServiceClient with NewServiceClientByURL if the service is still present; bypassing the discovery process.

func NewServiceClients

func NewServiceClients(searchTarget string) (clients []ServiceClient, errors []error, err error)

NewServiceClients discovers services, and returns clients for them. err will report any error with the discovery process (blocking any device/service discovery), errors reports errors on a per-root-device basis.

func NewServiceClientsByURL

func NewServiceClientsByURL(loc *url.URL, searchTarget string) ([]ServiceClient, error)

NewServiceClientsByURL creates client(s) for the given service URN, for a root device at the given URL.

func NewServiceClientsFromRootDevice

func NewServiceClientsFromRootDevice(rootDevice *RootDevice, loc *url.URL, searchTarget string) ([]ServiceClient, error)

NewServiceClientsFromDevice creates client(s) for the given service URN, in a given root device. The loc parameter is simply assigned to the Location attribute of the returned ServiceClient(s).

func (*ServiceClient) GetServiceClient

func (client *ServiceClient) GetServiceClient() *ServiceClient

GetServiceClient returns the ServiceClient itself. This is provided so that the service client attributes can be accessed via an interface method on a wrapping type.

type SpecVersion

type SpecVersion struct {
	Major int32 `xml:"major"`
	Minor int32 `xml:"minor"`
}

SpecVersion is part of a RootDevice, describes the version of the specification that the data adheres to.

type URLField

type URLField struct {
	URL url.URL `xml:"-"`
	Ok  bool    `xml:"-"`
	Str string  `xml:",chardata"`
}

URLField is a URL that is part of a device description.

func (*URLField) SetURLBase

func (uf *URLField) SetURLBase(urlBase *url.URL)