用Swift解析UPnP响应？

Question

这个问题可能不需要如此具体，但我正在进行一个正在搜索UPnP设备的项目(工作非常好)。

我得到这样的数据；

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)

    }

数据响应以NSString的形式返回，如下所示；

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响应有一定的了解，但由于这个响应似乎只是一个冗长的字符串，所以我试图弄清楚如何将数据解析到字典中，这样我就可以做一个；

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

这不一定是特定于UPnP的，而是一个需要把握的总体前提。

Answer 1

不久前，我还在开发一个快速的UPNP库。下面是我如何使用正则表达式的一种方法：https://github.com/ambientlight/ambientUPNP/blob/master/ambientUPNP/SSDPMessage.swift

您可以使用解析SSDP消息，但是对于UPNP事件，您不应该使用这种方法，因为它们是通过TCP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

引用(从UDP套接字读取-固定长度)：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)
    }
}