"""
All the API endpoints for controling processes and tunnels via SSH
"""
import json
from flask import session, redirect, request, Response, make_response
from flask_restful import Resource
import flask_restful
from . import api, islocal
if islocal:
from .localssh import Ssh
from .localtunnelstat import Tunnelstat
class GetCert(Resource):
"""
This class is necessary because I'm not reconfiguring
SSHAuthZ to support CORS, but the TES does support CORS
"""
def post(self):
"""
takes a public key, returns to the SPA a certificate
"""
print("in GetCert.post")
data = request.get_json()
print(data)
return {'cert':GetCert.get_cert(data['token'], data['pubkey'], data['signing_url'])}
@staticmethod
def get_cert(access_token, pub_key, url):
"""
Sign a pub key into a cert
"""
import requests
print("accss_token {}".format(access_token))
print("pub_key {}".format(pub_key))
print("url {}".format(url))
sess = requests.Session()
headers = {"Authorization":"Bearer %s"%access_token}
data = {"public_key":pub_key}
resp = sess.post(url, json=data, headers=headers, verify=False)
print("get_cert returned from its external call")
data = resp.json()
return data['certificate']
class TestAuth(Resource):
"""
Tests whether the backend can login to the selected compute Resource
"""
def get(self):
"""
tell the SPA if the TES is logged in
"""
return 'token' in session
def get_conn_params():
"""
Return parameters relating to the backend compute service
Retrieve them from the session (ideally)
"""
return get_m3_params()
def get_m3_params():
"""
Hard code the parameters for M3. This will be removed latter
factored into a site config file for each compute backend
parsed and set by the frontend.
"""
params = {}
params['host'] = 'm3.massive.org.au'
params['user'] = 'chines'
params['cancelcmd'] = 'scancel {jobid}'
params['statcmd'] = '/home/chines/jsonstat.py'
params['submitcmd'] = 'sbatch --partition=m3f'
params['internalfirewall'] = False
return params
def get_app_params():
"""
Return the parameters for the application retrieved from the Session
"""
keys = ['startscript', 'paramscmd', 'client','localbind']
returnvalue = {}
for k in keys:
try:
returnvalue[k] = session.get(k)
except: # This should be a key exception, i.e. if the key doesn't exist on the session
pass
print("got app params",returnvalue)
return returnvalue
class TunnelstatEP(Resource):
"""
Endpoints used by the WS proxy
"""
def put(self, authtok):
"""
update the last used time on a tunnel
"""
Tunnelstat.update(authtok)
def get(self, authtok):
"""
given an authtoken, return the port of the tunnels
"""
port = Tunnelstat.getport(authtok)
return port
class Stat(Resource):
"""
endpoints to return info on jobs on the backend compute Resource
"""
def get(self):
"""
get info on the job from the backend
"""
params = get_conn_params()
res = Ssh.execute(host=params['host'], user=params['user'], cmd=params['statcmd'])
if not (res['stderr'] == '' or res['stderr'] is None or res['stderr'] == b''):
print(res['stderr'])
flask_restful.abort(400, message=res['stderr'].decode())
return json.loads(res['stdout'].decode())
class JobCancel(Resource):
"""
Terminate a job on the compute backend
"""
def delete(self, jobid):
"""
Terminate a job on the backend
"""
print("in jobcancle jobid is {}".format(jobid))
params = get_conn_params()
res = Ssh.execute(host=params['host'], user=params['user'],
cmd=params['cancelcmd'].format(jobid=jobid))
if not (res['stderr'] == '' or res['stderr'] is None or res['stderr'] == b''):
flask_restful.abort(400, message=res['stderr'].decode())
return res['stdout'].decode()
class AppSetup(Resource):
"""
configure the session for the app the user wants
"""
def post(self):
"""
post details of the app to be run or connected to
"""
data = request.get_json()
keys = ['startscript', 'paramscmd', 'client','localbind']
for key in keys:
session[key] = data[key]
print(data[key])
class JobSubmit(Resource):
"""
Class dealing the starting a new job on the compute backend
"""
def post(self):
"""starting a job is a post, since it changes the state of the backend"""
params = get_conn_params()
appparams = get_app_params()
res = Ssh.execute(host=params['host'], user=params['user'],
cmd=params['submitcmd'], stdin=appparams['startscript'])
if not (res['stderr'] == '' or res['stderr'] is None or res['stderr'] == b''):
print(res['stderr'])
flask_restful.abort(400, message=res['stderr'].decode())
return res['stdout'].decode()
def gen_authtok():
"""
generate a random string suitable for an auth token stored in a cookie
"""
import random
import string
return ''.join(random.SystemRandom().choice(string.ascii_uppercase +
string.digits) for _ in range(16))
class JobConnect(Resource):
"""
endpoints for connecting to an existing JobCancel
"""
def create_tunnel(self, params, appparams, batchhost, data):
connectparams = {}
if 'paramscmd' in appparams and appparams['paramscmd'] is not None:
connectparams['batchhost'] = batchhost
paramcmd = 'ssh {batchhost} '.format(batchhost=batchhost) + appparams['paramscmd']
res = Ssh.execute(host=params['host'], user=params['user'], cmd=paramcmd.format(data))
try:
connectparams.update(json.loads(res['stdout']))
except json.decoder.JSONDecodeError as e:
print(res['stdout'])
print(res['stderr'])
if not (res['stderr'] == '' or res['stderr'] is None or res['stderr'] == b''):
flask_restful.abort(400, message=res['stderr'].decode())
if 'port' in connectparams and 'batchhost' in connectparams:
tunnelport, pids = Ssh.tunnel(port=connectparams['port'],
batchhost=connectparams['batchhost'],
user=params['user'], host=params['host'],
internalfirewall=params['internalfirewall'],
localbind=appparams['localbind'])
authtok = gen_authtok()
Tunnelstat.newtunnel(authtok, tunnelport, pids)
connectparams['localtunnelport'] = tunnelport
connectparams['authtok'] = authtok
return connectparams
def get(self, jobid, batchhost):
"""
Connecting to a job is a get operation (i.e. it does not make modifications)
"""
params = get_conn_params()
appparams = get_app_params()
data = request.get_json()
connectparams = self.create_tunnel(params, appparams, batchhost, data)
return self.connect(appparams, connectparams)
def connect(self, appparams, connectparams):
"""
perform the connection either by forking a local client or returning a redirect
"""
import subprocess
if 'cmd' in appparams['client'] and appparams['client']['cmd'] is not None:
# We need for fork a local process such as vncviewer or a terminal
# We may need a wrapper for local processes to find the correct
# process on all OS
cmdlist = []
for cmdarg in appparams['client']['cmd']:
cmdlist.append(cmdarg.format(**connectparams))
app_process = subprocess.Popen(cmdlist, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
# stdout, stderr = app_process.communicate()
# if stderr is not "":
# return "connected with cmd {} but got error {}".format(cmdlist,stderr)
elif 'redir' in appparams['client'] and appparams['client']['redir'] is not None:
template_response = Response()
template_response.set_cookie(key='twsproxyauth', value=connectparams['authtok'])
twsproxy = 'http://localhost:4000/'
response = make_response(redirect(twsproxy+appparams['client']['redir'].
format(**connectparams)))
response.set_cookie('twsproxyauth', connectparams['authtok'])
return response
return "Connecting with cmd {}".format(cmdlist)
api.add_resource(TunnelstatEP, '/tunnelstat/<string:authtok>')
api.add_resource(GetCert, '/getcert')
api.add_resource(Stat, '/stat')
api.add_resource(JobCancel, '/cancel/<int:jobid>')
api.add_resource(JobSubmit, '/submit')
api.add_resource(JobConnect, '/connect/<int:jobid>/<string:batchhost>')
api.add_resource(AppSetup, '/appsetup')