在 Swift 中解析 UPnP 响应?

Parsing A UPnP Response In Swift?

这个问题可能不需要那么具体,但我正在做一个搜索 UPnP 设备的项目(效果很好)。

我是这样获取数据的;

func udpSocket(sock: GCDAsyncUdpSocket!, didReceiveData data: NSData!, fromAddress address: NSData!, withFilterContext filterContext: AnyObject!) {

        var host: NSString?
        var port1: UInt16 = 0
        GCDAsyncUdpSocket.getHost(&host, port: &port1, fromAddress: address)
        //print(host)

        let response: NSString = NSString(data: data!, encoding: NSUTF8StringEncoding)!
        print(response)

    }

数据响应作为 NSString 返回,看起来像这样;

HTTP/1.1 200 OK
CACHE-CONTROL: max-age=120
DATE: Sun, 31 Jan 2016 22:47:45 GMT
ST: upnp:rootdevice
USN: uuid:f7a65ab0-f527-4b85-a8ad-68104aa2b322::upnp:rootdevice
EXT:
SERVER: Linux/BHR4 UPnP/1.1 MiniUPnPd/1.8
LOCATION: http://192.168.1.1:49420/rootDesc.xml
OPT: "http://schemas.upnp.org/upnp/1/0/"; ns=01
01-NLS: 1
BOOTID.UPNP.ORG: 1
CONFIGID.UPNP.ORG: 1337


HTTP/1.1 200 OK
Cache-Control: max-age=600
EXT: 
Location: http://192.168.1.1:1901/root.xml
SECURELOCATION.UPNP.ORG: https://192.168.1.1:1902/root.xml
Server: Linux/3.4 UPnP/2.0 bhr4/1.2
ST: upnp:rootdevice
USN: uuid:9518ecfc-cf2f-57e4-bb23-5182aa6a23cd::upnp:rootdevice
DATE: Wed, 19 Jan 2000 02:39:56 GMT
BOOTID.UPNP.ORG: 1


HTTP/1.1 200 OK
Cache-Control: max-age=600
EXT: 
Location: http://192.168.1.1:1901/root.xml
SECURELOCATION.UPNP.ORG: https://192.168.1.1:1902/root.xml
ST: urn:schemas-upnp-org:device:ManageableDevice:2
USN: uuid:9518acfc-cf2f-57e4-cc23-5a12aa6a23cd::urn:schemas-upnp-org:device:ManageableDevice:2
Server: Linux/3.4 UPnP/2.0 bhr4/1.2
DATE: Wed, 19 Jan 2000 02:39:56 GMT
BOOTID.UPNP.ORG: 1

我对如何解析 XML 或 JSON 响应有一些了解,但由于此响应似乎只是一个冗长的字符串,我想弄清楚如何解析将数据放入字典中,这样我就可以做一个;

for item in response { print(item.location) }

这不一定是UPnP特有的,而是一个整体把握的前提。

不久前我正在研究 swift UPNP 库。 这是我使用正则表达式的一种方式: https://github.com/ambientlight/ambientUPNP/blob/master/ambientUPNP/SSDPMessage.swift

您可以用于解析 SSDP 消息,但是对于 UPNP GENA 事件,您不应该使用这种方法,因为它们是通过 TCP 进行的,因此您有一个流套接字,您应该相应地将其作为流读取。看看这里: https://github.com/ambientlight/ambientUPNP/blob/master/ambientUPNP/components/HTTPInternals.swift

参考(从UDP套接字读取-定长)https://github.com/ambientlight/ambientUPNP/blob/master/ambientUPNP/SSDPServer.swift

self.readMulticastSocket = try PosixInternals.initMulticastUDPSocket(SSDPDefaultPort, multicastAddress: SSDPMulticastAddress)
let readMulticastSource = dispatch_source_create(DISPATCH_SOURCE_TYPE_READ, UInt(readMulticastSocket), 0, _readMulticastQueue)

dispatch_source_set_event_handler(readMulticastSource) {

     do {

          let (data, senderAddress) = try PosixInternals.recvData(self.readMulticastSocket, readSize: SSDPDefaultReadSize)
          let message = try SSDPMessage.messageWithDataAndAddress(data, senderAddress: senderAddress)
          //print("\(message)\n")
          self._processMessage(message)

    } catch {
          print(error)
    }
}