#1000 Fix ogClient HTTP length handling

Irina reports that "Partition assistant"/"Asistente de particionado" is
not working. This is happening because ogClient is not reading the full
data ogServer sends when the entire HTTP PDU is larger than 1024.
However, ogClient should read the whole message, reading until read data
length is greater or equal to "Content-Length" header value.

ogClient fails to obtain "Content-Length" value because is looking for
"content-length", be aware of the case sensitivity. It also needs to
take into account the header length because read data length also
includes headers.

This patch updates ogClient to:

1) look for "Content-Length instead of "content-length".

2) compare read date length with content length plus headers
   length.

src/ogClient.py

@@ -55,6 +55,7 @@ class ogClient:
 		self.data = ""
 		self.trailer = False
 		self.content_len = 0
+		self.header_len = 0
 
 		try:
 			self.sock.connect((self.ip, self.port))
@@ -98,23 +99,27 @@ class ogClient:
 		request = restRequest()
 
 		if not self.trailer:
-			if self.data.find("\r\n") > 0:
+			header_len = self.data.find("\r\n")
+			if header_len > 0:
 				# https://stackoverflow.com/questions/4685217/parse-raw-http-headers
 				request_line, headers_alone = self.data.split('\n', 1)
 				headers = email.message_from_file(StringIO(headers_alone))
 
-				if 'content-length' in headers.keys():
-					self.content_len = int(headers['content-length'])
+				if 'Content-Length' in headers.keys():
+					self.content_len = int(headers['Content-Length'])
 
 				self.trailer = True
+				# Add 2 because self.data.find("\r\n") does not count "\r\n" for the length
+				self.header_len = header_len + 2
 
-		if self.trailer and len(self.data) >= self.content_len:
+		if self.trailer and (len(self.data) >= self.content_len + self.header_len):
 			request.parser(self.data)
 			self.ogrest.process_request(request, self)
 
 			# Cleanup state information from request
 			self.data = ""
 			self.content_len = 0
+			self.header_len = 0
 			self.trailer = False
 
 	def disconnect(self):