Create new ogClient

This commit init the new ogClient. The new ogClient has support for configuring
and for connecting with the ogAdminServer.

.gitignore

@@ -127,3 +127,6 @@ dmypy.json
 
 # Pyre type checker
 .pyre/
+
+# ignore swp
+*.swp

cfg/ogagent.cfg

@@ -0,0 +1,7 @@
+[opengnsys]
+ip=192.168.2.175
+port=1234
+# Remote OpenGnsys Service
+remote=https://192.168.2.10/opengnsys/rest
+# Log Level, if ommited, will be set to INFO
+log=DEBUG

main.py

@@ -0,0 +1,39 @@
+from src.ogClient import *
+from src.ogConfig import *
+
+CONNECTING = 0
+RECEIVING = 1
+
+def main():
+	ogconfig = ogConfig()
+	if (not ogconfig.parserFile('cfg/ogagent.cfg')):
+		print 'Error: Parsing configuration file'
+		return 0
+
+	ip = ogconfig.getValueSection('opengnsys', 'ip')
+	port = ogconfig.getValueSection('opengnsys', 'port')
+
+	client = ogClient(ip, int(port))
+	client.connect()
+
+	while 1:
+		sock = client.get_socket()
+		state = client.get_state()
+
+		if state == CONNECTING:
+			readset = [ sock ]
+			writeset = [ sock ]
+		else:
+			readset = [ sock ]
+			writeset = [ ]
+
+		readable, writable, exception = select.select(readset, writeset, [ ])
+		if state == CONNECTING and sock in writable:
+			client.connect2()
+		elif state == RECEIVING and sock in readable:
+			client.receive()
+		else:
+			print "bad state" + str(state)
+
+if __name__ == "__main__":
+	main()

src/ogClient.py

@@ -0,0 +1,95 @@
+import errno
+import select
+import socket
+import time
+import httplib
+from mimetools import Message
+from StringIO import StringIO
+
+CONNECTING = 0
+RECEIVING = 1
+
+class ogClient:
+	def __init__(self, ip, port):
+		self.ip = ip
+		self.port = port
+
+	def get_socket(self):
+		return self.sock
+
+	def get_state(self):
+		return self.state
+
+	def connect(self):
+		print "connecting"
+		self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+		self.sock.setblocking(0)
+		self.state = CONNECTING
+		self.data = ""
+		self.trailer = False
+		self.content_len = 0
+
+		try:
+			self.sock.connect((self.ip, self.port))
+		except socket.error, err:
+			if err.errno == errno.EINPROGRESS:
+				return
+			elif err.errno == errno.ECONNREFUSED:
+				return
+
+			print "Error connect " + str(err)
+
+	def connect2(self):
+		try:
+			self.sock.connect((self.ip, self.port))
+		except socket.error, err:
+			if err.errno == errno.EISCONN:
+				print "connected"
+				self.state = RECEIVING
+			else:
+				print "connection refused, retrying..."
+				self.state = CONNECTING
+				self.sock.close()
+				self.connect()
+
+	def receive(self):
+		print "receiving"
+		try:
+			data = self.sock.recv(1024)
+		except socket.err, err:
+			print "Error3 " + str(err)
+
+		if len(data) == 0:
+			self.state = CONNECTING
+			self.sock.close()
+			self.connect()
+
+		print "received " + data
+		self.data = self.data + data
+
+		if not self.trailer:
+			if self.data.find("\r\n") > 0:
+				# https://stackoverflow.com/questions/4685217/parse-raw-http-headers
+				request_line, headers_alone = self.data.split('\n', 1)
+				headers = Message(StringIO(headers_alone))
+
+				print "DEBUG: \r\n trailer received"
+				print "DEBUG: HTTP keys are " + str(headers.keys())
+
+				if 'content-length' in headers.keys():
+					self.content_len = int(headers['content-length'])
+
+				self.trailer = True
+
+		if self.trailer and len(self.data) >= self.content_len:
+			#
+			# TODO: handle request here
+			#
+
+			self.sock.send("HTTP/1.0 200 OK\r\n\r\n")
+
+			# Cleanup state information from request
+			self.data = ""
+			self.content_len = 0
+			self.trailer = False
+			print "DEBUG: request has been processed!"

src/ogConfig.py

@@ -0,0 +1,24 @@
+import configparser
+
+class ogConfig:
+	def __init__(self):
+		self.parser = configparser.ConfigParser()
+
+	def parserFile(self, path):
+		self.parser.read(path)
+		if len(self.parser.sections()) == 0:
+			return False
+
+		return True
+
+	def getSections(self):
+		return self.parser.sections()
+
+	def getContainsSection(self, section):
+		return section in self.parser
+
+	def getValueSection(self, section, key):
+		if (not self.getContainsSection(section)):
+			return ''
+
+		return self.parser[section][key]