HTTP Button Creator Device Handler On/Off Switch

/*
*  HTTP Button
*  Category: Device Handler
*
*  Source: https://community.smartthings.com/t/beta-release-uri-switch-device-handler-for-controlling-items-via-http-calls/37842
*
*  Credit: tguerena, surge919, CSC
*/

import groovy.json.JsonSlurper

metadata {
    definition (name: "HTTP Button", namespace: "sc", author: "SC") {
        capability "Switch"
        attribute "triggerswitch", "string"
        command "DeviceTrigger"
    }

    preferences {
        input("DeviceIP", "string", title:"Device IP Address", description: "Please enter your device's IP Address", required: true, displayDuringSetup: true)
        input("DevicePort", "string", title:"Device Port", description: "Empty assumes port 80.", required: false, displayDuringSetup: true)
        input("DevicePathOn", "string", title:"URL Path for ON", description: "Rest of the URL, include forward slash.", displayDuringSetup: true)
        input("DevicePathOff", "string", title:"URL Path for OFF", description: "Rest of the URL, include forward slash.", displayDuringSetup: true)
        input(name: "DevicePostGet", type: "enum", title: "POST or GET", options: ["POST","GET"], defaultValue: "POST", required: false, displayDuringSetup: true)
        section() {
            input("HTTPAuth", "bool", title:"Requires User Auth?", description: "Choose if the HTTP requires basic authentication", defaultValue: false, required: true, displayDuringSetup: true)
            input("HTTPUser", "string", title:"HTTP User", description: "Enter your basic username", required: false, displayDuringSetup: true)
            input("HTTPPassword", "string", title:"HTTP Password", description: "Enter your basic password", required: false, displayDuringSetup: true)
        }
    }


    // simulator metadata
    simulator {
    }

    // UI tile definitions
    tiles {
        standardTile("DeviceTrigger", "device.switch", width: 2, height: 2, canChangeIcon: true) {
            state "off", label: 'Off', action: "on", icon: "st.switches.switch.off", backgroundColor: "#ffffff"
            state "on", label: 'On', action: "off", icon: "st.switches.switch.on", backgroundColor: "#79b821"
        }
        main "DeviceTrigger"
            details (["DeviceTrigger"])
    }
}

def parse(String description) {
    log.debug(description)
}

def on() {
    log.debug "---ON COMMAND--- ${DevicePathOn}"
    sendEvent(name: "switch", value: "on", isStateChange: true)
    runCmd(DevicePathOn)
}

def off() {
    log.debug "---OFF COMMAND--- ${DevicePathOff}"
    sendEvent(name: "switch", value: "off", isStateChange: true)
    runCmd(DevicePathOff)
}

def runCmd(String varCommand) {
    def host = DeviceIP
    def LocalDevicePort = ''
    if (DevicePort==null) { LocalDevicePort = "80" } else { LocalDevicePort = DevicePort }

    def userpassascii = "${HTTPUser}:${HTTPPassword}"
    def userpass = "Basic " + userpassascii.encodeAsBase64().toString()

    log.debug "The device id configured is: $device.deviceNetworkId"

    def path = varCommand
    log.debug "path is: $path"
    //log.debug "Uses which method: $DevicePostGet"
    def body = ""
    //log.debug "body is: $body"

    def headers = [:]
    headers.put("HOST", "$host:$LocalDevicePort")
    headers.put("Content-Type", "application/x-www-form-urlencoded")
    if (HTTPAuth) {
        headers.put("Authorization", userpass)
    }
    log.debug "The Header is $headers"
    def method = "POST"
    try {
        if (DevicePostGet.toUpperCase() == "GET") {
            method = "GET"
            }
        }
    catch (Exception e) {
        settings.DevicePostGet = "POST"
        log.debug e
        log.debug "You must not have set the preference for the DevicePOSTGET option"
    }
    log.debug "The method is $method"
    try {
        def hubAction = new physicalgraph.device.HubAction(
            method: method,
            path: path,
            body: body,
            headers: headers
            )
        log.debug hubAction
        return hubAction
    }
    catch (Exception e) {
        log.debug "Hit Exception $e on $hubAction"
    }

    //sendEvent
    if (varCommand == "off"){
        sendEvent(name: "switch", value: "off")
        log.debug "Executing OFF"
    } else {
        sendEvent(name: "switch", value: "on")
        log.debug "Executing ON"
    }

}