Hello everyone,
I am currently trying to get a list of UPnP device via SSDP (Simple Service Discovery Protocol).
A minimalistic working NodeJS example looks like this:
�� �� var dgram = require('dgram');
�� �� var message = new Buffer(
�� �� �� �� "M-SEARCH * HTTP/1.1\r\n" +
�� �� �� �� "MAN:\"ssdp:discover\"\r\n" +
�� �� �� �� "ST:ssdp:all\r\n" +��
�� �� �� �� "MX:1\r\n" +��
�� �� �� �� "\r\n"
�� �� );
�� �� var client = dgram.createSocket("udp4");
�� �� client.on("message", function (msg, rinfo) {
�� �� �� �� console.log("server got: " + msg + " from " + rinfo.address + ":" + rinfo.port);
�� �� });
�� �� client.send(message, 0, message.length, 1900, "239.255.255.250");
�� �� client.close();
I tried to recreate the same functionality in Pharo with the following piece of code:
�� | message udpSocket host |
�� message := 'M-SEARCH * HTTP/1.1\r\n' ,
�� �� 'MAN:"ssdp:discover"\r\n' ,
�� �� 'ST:ssdp:all\r\n' ,
�� �� 'MX:1\r\n' , '\r\n'.
�� udpSocket := Socket newUDP.
�� host := ��(NetNameResolver addressFromString: '239.255.255.250').
�� udpSocket sendData: message toHost: host port: 1900.
�� "udpSocket��waitForData."
�� Transcript show: 'Received: ' ,��udpSocket��receiveData.
�� udpSocket closeAndDestroy.
Unfortunately, this script hangs both in Pharo3 and Pharo4 (OS X 10.10, Pharo 30856 and 40611).
When I interrupt with Cmd+. the debugger shows the method
�� �� Socket>>waitForDataIfClosed:
and the hang is apparently in the line��
�� �� self readSemaphore wait
Could anyone give me some advice if I should to do this differently or what the issue with the Pharo script is?
Thanks in advance,
Manfred