ogRest: improve error logging when executing operations

Capture all possible Python exceptions in the try/except block of every
opengnsys operation.

Create an error handling function to deduplicate code in the except
block. The error handling function resets the ogRest state to IDLE and
sends the corresponding 500 Internal Server Error.

This *does not cover* every possible error. There are functions inside
ogThread which contain code that may raise errors that are not covered
by any try/except block.

src/ogRest.py

@@ -87,10 +87,8 @@ class ogThread():
 
 		try:
 			shellout = ogRest.operations.shellrun(request, ogRest)
-		except ValueError as err:
+		except Exception as e:
-			response = restResponse(ogResponses.INTERNAL_ERR)
+			ogRest.send_internal_server_error(client, exc=e)
-			client.send(response.get())
-			ogRest.state = ThreadState.IDLE
 			return
 
 		if request.getEcho():
@@ -114,10 +112,8 @@ class ogThread():
 	def session(client, request, ogRest):
 		try:
 			ogRest.operations.session(request, ogRest)
-		except ValueError as err:
+		except Exception as e:
-			response = restResponse(ogResponses.INTERNAL_ERR)
+			ogRest.send_internal_server_error(client, exc=e)
-			client.send(response.get())
-			ogRest.state = ThreadState.IDLE
 			return
 
 		response = restResponse(ogResponses.OK)
@@ -127,10 +123,8 @@ class ogThread():
 	def software(client, request, path, ogRest):
 		try:
 			software = ogRest.operations.software(request, path, ogRest)
-		except ValueError as err:
+		except Exception as e:
-			response = restResponse(ogResponses.INTERNAL_ERR)
+			ogRest.send_internal_server_error(client, exc=e)
-			client.send(response.get())
-			ogRest.state = ThreadState.IDLE
 			return
 
 		json_body = jsonBody()
@@ -144,10 +138,8 @@ class ogThread():
 	def hardware(client, path, ogRest):
 		try:
 			ogRest.operations.hardware(path, ogRest)
-		except ValueError as err:
+		except Exception as e:
-			response = restResponse(ogResponses.INTERNAL_ERR)
+			ogRest.send_internal_server_error(client, exc=e)
-			client.send(response.get())
-			ogRest.state = ThreadState.IDLE
 			return
 
 		json_body = jsonBody()
@@ -161,10 +153,8 @@ class ogThread():
 	def setup(client, request, ogRest):
 		try:
 			out = ogRest.operations.setup(request, ogRest)
-		except ValueError as err:
+		except Exception as e:
-			response = restResponse(ogResponses.INTERNAL_ERR)
+			ogRest.send_internal_server_error(client, exc=e)
-			client.send(response.get())
-			ogRest.state = ThreadState.IDLE
 			return
 
 		json_body = jsonBody(out)
@@ -176,10 +166,8 @@ class ogThread():
 	def image_restore(client, request, ogRest):
 		try:
 			ogRest.operations.image_restore(request, ogRest)
-		except ValueError as err:
+		except Exception as e:
-			response = restResponse(ogResponses.INTERNAL_ERR)
+			ogRest.send_internal_server_error(client, exc=e)
-			client.send(response.get())
-			ogRest.state = ThreadState.IDLE
 			return
 
 		json_body = jsonBody()
@@ -197,10 +185,8 @@ class ogThread():
 								    request,
 								    ogRest)
 			software = ogRest.operations.software(request, path, ogRest)
-		except ValueError as err:
+		except Exception as e:
-			response = restResponse(ogResponses.INTERNAL_ERR)
+			ogRest.send_internal_server_error(client, exc=e)
-			client.send(response.get())
-			ogRest.state = ThreadState.IDLE
 			return
 
 		kibi = 1024
@@ -226,10 +212,8 @@ class ogThread():
 	def refresh(client, ogRest):
 		try:
 			out = ogRest.operations.refresh(ogRest)
-		except ValueError as err:
+		except Exception as e:
-			response = restResponse(ogResponses.INTERNAL_ERR)
+			ogRest.send_internal_server_error(client, exc=e)
-			client.send(response.get())
-			ogRest.state = ThreadState.IDLE
 			return
 
 		json_body = jsonBody(out)
@@ -276,6 +260,13 @@ class ogRest():
 		else:
 			raise ValueError('Mode not supported.')
 
+	def send_internal_server_error(self, client, exc=None):
+		if exc:
+		    logging.exception('Unexpected error')
+		response = restResponse(ogResponses.INTERNAL_ERR)
+		client.send(response.get())
+		self.state = ThreadState.IDLE
+
 	def process_request(self, request, client):
 		method = request.get_method()
 		URI = request.get_uri()