create a node with command launcher method by rest api, but launch command is empty.

The decoded json should be:
{"launcher":

{"stapler-class": "hudson.slaves.CommandLauncher", "agentCommand": ""/home/jenkins/launch_slave.sh" "root" "/home/nodepool/.ssh/id_rsa" "10.145.81.65" "192.168.100.35""}

, "numExecutors": 1, "nodeProperties":

{"stapler-class-bag": "true"}

, "name": "centos-dev-testcloud-dev-118", "retentionStrategy":

{"stapler-class": "hudson.slaves.RetentionStrategy$Always"}

, "remoteFS": "/home/jenkins", "type": "hudson.slaves.DumbSlave$DescriptorImpl", "nodeDescription": "Dynamic single use centos-dev node", "labelString": "centos-dev", "mode": "EXCLUSIVE"}

The raw http packet capture:

GET /openstackcijenkins/computer/doCreateItem?json=%7B%22launcher%22%3A+%7B%22stapler-class%22%3A+%22hudson.slaves.CommandLauncher%22%2C+%22agentCommand%22%3A+%22%26quot%3B%2Fhome%2Fjenkins%2Flaunch_slave.sh%26quot%3B+%26quot%3Broot%26quot%3B+%26quot%3B%2Fhome%2Fnodepool%2F.ssh%2Fid_rsa%26quot%3B+%26quot%3B10.145.81.65%26quot%3B+%26quot%3B192.168.100.35%26quot%3B%22%7D%2C+%22numExecutors%22%3A+1%2C+%22nodeProperties%22%3A+%7B%22stapler-class-bag%22%3A+%22true%22%7D%2C+%22name%22%3A+%22centos-dev-testcloud-dev-118%22%2C+%22retentionStrategy%22%3A+%7B%22stapler-class%22%3A+%22hudson.slaves.RetentionStrategy%24Always%22%7D%2C+%22remoteFS%22%3A+%22%2Fhome%2Fjenkins%22%2C+%22type%22%3A+%22hudson.slaves.DumbSlave%24DescriptorImpl%22%2C+%22nodeDescription%22%3A+%22Dynamic+single+use+centos-dev+node%22%2C+%22labelString%22%3A+%22centos-dev%22%2C+%22mode%22%3A+%22EXCLUSIVE%22%7D&type=hudson.slaves.DumbSlave%24DescriptorImpl&name=centos-dev-testcloud-dev-118 HTTP/1.1

Accept-Encoding: identity

Host: 10.145.81.234

Connection: close

Authorization: Basic YWRtaW46NmIxMTJiZGNlZGIzOTliOTJlMjUxOGRjMDhiOWNlZDc=

User-Agent: Python-urllib/2.7

HTTP/1.1 302 Found

Date: Fri, 06 Jun 2014 22:07:08 GMT

Server: Jetty(8.y.z-SNAPSHOT)

Location: http://10.145.81.234/openstackcijenkins/computer/

Content-Length: 0

Connection: close

Content-Type: text/plain