Bonjour 服务发现找不到主机
Bonjour service discovery not finding hosts
我正在尝试在 Swift3 中实施 Bonjour NetServiceBrowser,以便发现我网络上的主机。
当我使用以下命令在终端中手动搜索时,我会找到主机。
dns-sd -B
然而,当我尝试在 Swift 中使用 NetServiceBrowser(见下面的代码)时,它只会打印 "starting search.."。我通过遵循 Bonjour documentation.
实现了这个 class
我不明白哪里出了问题。 Bonjour 在 Swift 上的工作方式是否不同?我在网上找不到有效的例子。我在 domain
("local", "local.", "") 或 name
.
上尝试了几种变体
class ZeroConf: NSObject, NetServiceBrowserDelegate, NetServiceDelegate{
var browser: NetServiceBrowser!
var services = [NetService]()
let domain = "local"
let name = "_http._tcp"
func startSearch(){
self.services.removeAll()
self.browser = NetServiceBrowser()
self.browser.delegate = self
self.browser.searchForServices(ofType: name, inDomain: domain)
}
func netService(_ sender: NetService, didNotPublish errorDict: [String : NSNumber]) {
debugPrint(errorDict)
}
func netServiceBrowserWillSearch(_ browser: NetServiceBrowser) {
print("starting search..")
}
func netServiceBrowserDidStopSearch(_ browser: NetServiceBrowser) {
print("Stoped search")
}
func netServiceBrowser(_ browser: NetServiceBrowser, didNotSearch errorDict: [String : NSNumber]) {
print("error in search")
debugPrint(errorDict)
}
func netServiceBrowser(_ browser: NetServiceBrowser, didFind service: NetService, moreComing: Bool) {
print("found service")
services.append(service)
debugPrint(service)
}
func netServiceBrowser(_ browser: NetServiceBrowser, didRemove service: NetService, moreComing: Bool) {
if let ix = self.services.index(of:service) {
self.services.remove(at:ix)
print("removing a service")
}
}
func netServiceDidResolveAddress(_ sender: NetService) {
print("did resolve address")
}
}
我发现了为什么它对我不起作用。我试图从主循环执行代码,而它显然应该从不同的线程调用。因此,我将 startSearch
中的代码更改为
DispatchQueue.main.async {
self.browser.schedule(in: RunLoop.current, forMode: .defaultRunLoopMode)
self.browser.searchForServices(ofType: self.name, inDomain: self.domain)
RunLoop.current.run()
}
我正在尝试在 Swift3 中实施 Bonjour NetServiceBrowser,以便发现我网络上的主机。
当我使用以下命令在终端中手动搜索时,我会找到主机。
dns-sd -B
然而,当我尝试在 Swift 中使用 NetServiceBrowser(见下面的代码)时,它只会打印 "starting search.."。我通过遵循 Bonjour documentation.
实现了这个 class我不明白哪里出了问题。 Bonjour 在 Swift 上的工作方式是否不同?我在网上找不到有效的例子。我在 domain
("local", "local.", "") 或 name
.
class ZeroConf: NSObject, NetServiceBrowserDelegate, NetServiceDelegate{
var browser: NetServiceBrowser!
var services = [NetService]()
let domain = "local"
let name = "_http._tcp"
func startSearch(){
self.services.removeAll()
self.browser = NetServiceBrowser()
self.browser.delegate = self
self.browser.searchForServices(ofType: name, inDomain: domain)
}
func netService(_ sender: NetService, didNotPublish errorDict: [String : NSNumber]) {
debugPrint(errorDict)
}
func netServiceBrowserWillSearch(_ browser: NetServiceBrowser) {
print("starting search..")
}
func netServiceBrowserDidStopSearch(_ browser: NetServiceBrowser) {
print("Stoped search")
}
func netServiceBrowser(_ browser: NetServiceBrowser, didNotSearch errorDict: [String : NSNumber]) {
print("error in search")
debugPrint(errorDict)
}
func netServiceBrowser(_ browser: NetServiceBrowser, didFind service: NetService, moreComing: Bool) {
print("found service")
services.append(service)
debugPrint(service)
}
func netServiceBrowser(_ browser: NetServiceBrowser, didRemove service: NetService, moreComing: Bool) {
if let ix = self.services.index(of:service) {
self.services.remove(at:ix)
print("removing a service")
}
}
func netServiceDidResolveAddress(_ sender: NetService) {
print("did resolve address")
}
}
我发现了为什么它对我不起作用。我试图从主循环执行代码,而它显然应该从不同的线程调用。因此,我将 startSearch
中的代码更改为
DispatchQueue.main.async {
self.browser.schedule(in: RunLoop.current, forMode: .defaultRunLoopMode)
self.browser.searchForServices(ofType: self.name, inDomain: self.domain)
RunLoop.current.run()
}