// 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.
func DiscoverDevices(searchTarget string) ([]MaybeRootDevice, error) {
httpu, err := httpu.NewHTTPUClient()
if err != nil {
return nil, err
}
defer httpu.Close()
responses, err := ssdp.SSDPRawSearch(httpu, string(searchTarget), 2, 3)
if err != nil {
return nil, err
}
results := make([]MaybeRootDevice, len(responses))
for i, response := range responses {
maybe := &results[i]
loc, err := response.Location()
if err != nil {
maybe.Err = ContextError{"unexpected bad location from search", err}
continue
}
maybe.Location = loc
if root, err := DeviceByURL(loc); err != nil {
maybe.Err = err
} else {
maybe.Root = root
}
}
return results, nil
}
// 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.
func DiscoverDevices(searchTarget string) ([]MaybeRootDevice, error) {
httpu, err := httpu.NewHTTPUClient()
if err != nil {
return nil, err
}
defer httpu.Close()
responses, err := ssdp.SSDPRawSearch(httpu, string(searchTarget), 2, 3)
if err != nil {
return nil, err
}
results := make([]MaybeRootDevice, len(responses))
for i, response := range responses {
maybe := &results[i]
loc, err := response.Location()
if err != nil {
maybe.Err = ContextError{"unexpected bad location from search", err}
continue
}
locStr := loc.String()
root := new(RootDevice)
if err := requestXml(locStr, DeviceXMLNamespace, root); err != nil {
maybe.Err = ContextError{fmt.Sprintf("error requesting root device details from %q", locStr), err}
continue
}
var urlBaseStr string
if root.URLBaseStr != "" {
urlBaseStr = root.URLBaseStr
} else {
urlBaseStr = locStr
}
urlBase, err := url.Parse(urlBaseStr)
if err != nil {
maybe.Err = ContextError{fmt.Sprintf("error parsing location URL %q", locStr), err}
continue
}
root.SetURLBase(urlBase)
maybe.Root = root
}
return results, nil
}