Classicui CMD?item=value&otheritem=value

Hey all, I’m trying to debug some (WirelessTag) sensor data collection into openHAB(2.1) and I’d thought a good first step would be to change them all to send data directly to my server rather than openHAB having to gather sensor data via the WirelessTag cloud service.

However the only way they can send temperature/humidity/lux data directly to my openHAB server is by a single GET call (per sensor, when new readings are taken) in the format http://IP:8080/classicui/CMD?Outside_Temperature=12&Outside_Humidity=60&Outside_Lux=1000

How can I capture all the data sent from that one call into openHAB? Does the rules engine have an implicit variable containing the whole QueryString sent, or anything?