Parsing A UPnP Response In Swift?

问题

This question may not need to be so specific, but I am working on a project that is searching for UPnP devices (working great).

I get the data like so;

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)

    }

The data response is returned as a NSString, and looks like so;

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

I have some understanding of how to parse XML or JSON responses, but being that this response seems to just be a lengthy string, I am trying to figure out how I could parse the data into a dictionary so I could do a;

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

This is not necessarily specific to UPnP, but an overall premise to grasp.

回答1:

I was working on a swift UPNP library not so long ago. Here is one way how I did it with regular expressions: https://github.com/ambientlight/ambientUPNP/blob/master/ambientUPNP/SSDPMessage.swift

You can use for parsing SSDP messages, however for UPNP GENA events you should not use this approach since they are over TCP, and therefore you have a stream-socket which you should read as a stream accordingly. Take a look here: https://github.com/ambientlight/ambientUPNP/blob/master/ambientUPNP/components/HTTPInternals.swift

Reference (reading from UDP socket - fixed length): 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)
    }
}

来源：https://stackoverflow.com/questions/35120659/parsing-a-upnp-response-in-swift

标签

swift

parsing

cocoaasyncsocket