def clientSendCmd(commPipes, cmd):
'''Send a request using named pipes to the projectInterface for handling.
This allows a separate client process to make requests of the projectInterface process.
It writes the request on fd_out and recieves the reply on fd_in.
'''
data = None
savedError = None
incomplete = True
while incomplete:
commPipes.fd_out.write(json.dumps(cmd) + os.linesep)
msg = commPipes.fd_in.readline()
if len(msg) == 0:
# fifo closed
raise StateError('commPipe closed')
response = json.loads(msg)
status = response.get('status', -1)
if status != 200:
raise RequestError(
'clientSendCmd: Cmd: {} status {}: error {}'.format(
cmd.get('cmd'), status, response.get('error')))
if 'data' in response:
try:
data = unpackDataMessage(response)
except Exception as err:
# The call may be incomplete, save the error and keep receiving as needed
logging.error('clientSendCmd: {}'.format(err))
if savedError is None:
savedError = err
cmd['callId'] = response.get('callId', -1)
# Check if need to continue to get more parts
incomplete = response.get('incomplete', False)
if savedError:
raise RequestError('clientSendCmd: {}'.format(savedError))
retVals = StructDict()
retVals.statusCode = response.get('status', -1)
if 'filename' in response:
retVals.filename = response['filename']
if 'fileList' in response:
retVals.fileList = response['fileList']
if 'fileTypes' in response:
retVals.fileTypes = response['fileTypes']
if data:
retVals.data = data
if retVals.filename is None:
raise StateError('clientSendCmd: filename field is None')
return retVals
def processPyScriptRequest(request):
if 'cmd' not in request:
raise StateError('handleFifoRequests: cmd field not in request: {}'.format(request))
cmd = request['cmd']
route = request.get('route')
localtimeout = request.get('timeout', 10) + 5
response = StructDict({'status': 200})
if route == 'dataserver':
try:
response = Web.sendDataMsgFromThread(request, timeout=localtimeout)
if response is None:
raise StateError('handleFifoRequests: Response None from sendDataMessage')
if 'status' not in response:
raise StateError('handleFifoRequests: status field missing from response: {}'.format(response))
if response['status'] not in (200, 408):
if 'error' not in response:
raise StateError('handleFifoRequests: error field missing from response: {}'.format(response))
Web.setUserError(response['error'])
logging.error('handleFifo status {}: {}'.format(response['status'], response['error']))
except Exception as err:
errStr = 'SendDataMessage Exception type {}: error {}:'.format(type(err), str(err))
response = {'status': 400, 'error': errStr}
Web.setUserError(errStr)
logging.error('handleFifo Excpetion: {}'.format(errStr))
raise err
else:
if cmd == 'webCommonDir':
response.filename = CommonOutputDir
elif cmd == 'resultValue':
try:
# forward to bioFeedback Display
Web.sendBiofeedbackMsgFromThread(json.dumps(request))
# forward to main browser window
Web.sendUserMsgFromThread(json.dumps(request))
# Accumulate results locally to resend to browser as needed
Web.addResultValue(request)
except Exception as err:
errStr = 'SendClassification Exception type {}: error {}:'.format(type(err), str(err))
response = {'status': 400, 'error': errStr}
Web.setUserError(errStr)
logging.error('handleFifo Excpetion: {}'.format(errStr))
raise err
elif cmd == 'subjectDisplay':
logging.info('subjectDisplay projectInterface Callback')
return response
