EWSがないのに、どうやって他のシステムのCalendarをExchangeに同期しますか?(2)

import groovyx.net.http.*

class ExchangeSyncService {

    static transactional = true
    
    static DOMAIN = 'my-domain'
    static CTMS_SYNC_USERNAME = 'usr'
    static CTMS_SYNC_PASSWORD = 'pwd'

    static HTTP_BUILDER_POOL = [:]
    private static getHttpBuilder(username) {
        HTTP_BUILDER_POOL[username] ?: ( HTTP_BUILDER_POOL[username] = new HTTPBuilder( "https://webmail.${DOMAIN}.com" ) )
    }

    def sendAppointment(params) {
        def username = CTMS_SYNC_USERNAME, password = CTMS_SYNC_PASSWORD
        _login(username, password)
        getHttpBuilder(username).post( path: "/Exchange/${username}/ ", body: getAppointmentBody(params)) {res->
            println res.statusLine.statusCode
        }
    }

    def saveTask(params) {
        def username = params.session.user?.username, password = params.session.user?.password
        _login(username, password)
        getHttpBuilder(username).post( path: "/Exchange/${username}/ ", body: getTaskBody(params)) {res->
            println res.statusLine.statusCode
        }
    }

    private _login(username, password) {
        getHttpBuilder(username).post(
          path: '/exchweb/bin/auth/owaauth.dll',
          body: [destination:"https://webmail.${DOMAIN}.com/Exchange",
            flags:'0',
            username:"${DOMAIN}/${username}",
            password:password]
          ) {res->
          if( res.statusLine.statusCode == 302 ) {
            println "${username} logged in to exchange server successfully."
          }
        }
    }

    private getAppointmentBody(m) {
        [
"Cmd": "sendappt",
"CmdReferring": "new",
"Embedded": "0",
"FORMTYPE": "appointment",
"Importance": "2",
"Optional": m.optional,//"[email protected]; [email protected]",
"ReadForm": "1",
"Required": m.required,//"[email protected]",
"Resource": m.resource,//"[email protected]",
"urn:schemas:calendar:alldayevent": "1",
"urn:schemas:calendar:busystatus": "BUSY",
"urn:schemas:calendar:dtend": m.dtend,//"2011-09-21T16:00:00.000Z", //bug： Exchange 
"urn:schemas:calendar:dtstart": m.dtstart,//"2011-09-21T15:30:00.000Z", //bug： Exchange 
"urn:schemas:calendar:location": "",
"urn:schemas:calendar:reminderoffset": m.reminderoffset,//"900",
"urn:schemas:calendar:responserequested": "0",
"urn:schemas:httpmail:importance": "1",
"urn:schemas:httpmail:subject": m.subject,//"(sent by ctmssync)",
"urn:schemas:httpmail:textdescription": "Accept it to get it on your calendar"
          ]
    }

    private getTaskBody(m) {
        [
"Cmd": "savetask",
"CmdReferring": "new",
"Embedded": "0",
"FORMTYPE": "task",
"MsgClass": "IPM.Task",
"ReadForm": "1",
"SENDUPDATE": "0",
"exception": "",
"http://schemas.microsoft.com/exchange/tasks/percentcomplete": "0",
"http://schemas.microsoft.com/exchange/tasks/resetreminder": "",
"http://schemas.microsoft.com/mapi/reminderset": "1",
"task_due": m.task_due,//"2011-08-04T00:00:00.000Z",
"task_remindertime": m.remindertime,//"2011-10-06T08:00:00.000Z",
"task_start": m.task_start,//"2011-10-04T00:00:00.000Z",
"task_status": "0",
"urn:schemas:httpmail:importance": "1",
"urn:schemas:httpmail:subject": m.subject,//"Title_2",
"urn:schemas:httpmail:textdescription": "This is a task created by SmartCTMS on behalf of you"
          ]
    }
}