def __init__(self, clientSocket, xmlHandler, isMain):
"""
Initialize a client handler.
@param clientSocket Socket to communicate with a client with.
@param xmlHandler XML Database object.
@param isMain Set to True if this server runs as the main server, otherwise False.
"""
self.clientSocket = clientSocket;
self.xmlHandler = xmlHandler;
self.isMain = isMain;
# Let other tasklets go first.
#schedule();
# Talk with our client.
try:
self.handle();
except socket.error, e:
# Socket error occurred.
Log.logPrint("Socket error while handling client: %s" % str(e), "WOWd.log");
def handle(self):
"""
Interpret incoming packets.
"""
# Receive up to 512 bytes of data.
data = self.clientSocket.recv(512);
data = data.rstrip();
if data == "":
Log.logPrint("Client closed socket before we could handle him.", "WOWd.log");
return;
print "Received",data;
# Retrieve the command.
input = [ arr.strip() for arr in data.split(" ") ];
command = input[0].upper().replace(":", "");
try:
input[1] = data[data.find(" "):];
except:
pass;
# Find and handle the command.
if command == "QRY":
# Incoming query.
resultList = self.xmlHandler.query(input[1]);
for line in resultList:
self.printLine(line);
stackless.tasklet(Log.recordHit)();
elif command == "AQRY":
# Incoming administration query.
resultList = self.xmlHandler.query(input[1], True);
for line in resultList:
self.printLine(line);
stackless.tasklet(Log.recordHit)();
elif command == "ADD":
# Incoming addition to the database.
if self.isMain:
# Attempt to add the record.
result = self.xmlHandler.add(input[1]);
if result:
self.printLine("Successfully added.");
self.triggerDistribute();
stackless.tasklet(Log.recordHit)("ADD");
else:
self.printLine("ERROR: Record already exists.");
else:
self.printLine("Only the primary server can change records.");
elif command == "UPD":
# Incoming update to a record.
if self.isMain:
data = [ arr.strip() for arr in input[1].split('|') ];
record = self.xmlHandler.createRecord(data, True);
result = self.xmlHandler.update(record.getID(), record);
if result:
self.printLine("OK");
self.triggerDistribute();
stackless.tasklet(Log.recordHit)("UPD");
else:
self.printLine("Target not found.");
else:
self.printLine("Only the primary server can change records.");
elif command == "DEL":
# Delete a record.
if self.isMain:
result = self.xmlHandler.delete(input[1]);
if result:
self.printLine("OK");
self.triggerDistribute();
stackless.tasklet(Log.recordHit)("DEL");
else:
self.printLine("ERROR: Record doesn't exist!");
else:
self.printLine("Only the primary server can change records.");
elif command == "DEPTLIST":
# Return a list of departments.
result = self.xmlHandler.getDepartments();
for department in result:
self.printLine(department);
elif command == "DEPTADD":
# Add a department.
if self.isMain:
result = self.xmlHandler.addDepartment(input[1]);
if not result:
self.printLine("ERROR: That department already exists!");
else:
self.printLine("Department successfully added.");
else:
self.printLine("This server cannot modify records, try a different one.");
elif command == "DEPTUPD":
# Update a department.
if self.isMain:
chachachachanges = input[1].split("|");
result = self.xmlHandler.modifyDepartment(chachachachanges[0], chachachachanges[1]);
if not result:
self.printLine("ERROR: That department already exists!");
else:
self.printLine("Department successfully updated.");
else:
self.printLine("This server cannot modify records, try a different one.");
elif command == "DEPTDEL":
# Remove a department.
if self.isMain:
result = self.xmlHandler.deleteDepartment(input[1].strip());
if not result:
self.printLine("ERROR: That department doesn't exist!");
else:
self.printLine("Department successfully deleted.");
else:
self.printLine("This server cannot delete records, try a different one.");
elif command == "PING":
# Just ping it, fox!
self.printLine("PONG");
elif command == "HIT":
queries = self.xmlHandler.getHits("QRY");
self.printLine(queries);
elif command == "HITALL":
hits = self.xmlHandler.getHits("ALL");
for arr in hits:
line = "%s %s" % (arr[0], arr[1]);
self.printLine(line);
elif command == "MAIN":
if self.isMain:
self.printLine("1");
else:
self.printLine("0");
elif command == "UHIT":
queries = self.xmlHandler.getHits("UPD");
self.printLine(queries);
elif command == "AHIT":
queries = self.xmlHandler.getHits("ADD");
self.printLine(queries);
elif command == "DHIT":
queries = self.xmlHandler.getHits("DEL");
self.printLine(queries);
elif command == "MAIL":
# Forward a mail message to the IT department.
mail = input[1].split("|");
mailer = MailMessage(mail[0], mail[1], mail[2], mail[3], "Feedback (" + mail[2] + ")");
if not mailer.mail():
self.printLine("An error occurred while trying to send your mail. Try again later.");
line = "A feedback e-mail failed from %s (%s)." % (mail[0], mail[1]);
logPrint(line);
else:
self.printLine("Your message was sent successfully.");
line = "A feedback e-mail was sent from %s (%s)." % (mail[0], mail[1]);
logPrint(line);
elif command == "VER":
# Version of the WOW client.
self.printLine(self.xmlHandler.version);
elif command == "SETVER":
# Set the version of the WOW client.
if self.isMain:
self.xmlHandler.version = input[1];
self.printLine("Version set.");
else:
self.printLine("Not main server.");
elif command.startswith("GETFILE"):
# Retrieve a file
logPrint("Main server is sending the database file...");
size = int(data.split("\n")[1]);
data = self.getfile(size);
# Now get sha1sum and check it against the server.
sum = self.xmlHandler.checksum(data);
self.printLine(sum);
response = self.clientSocket.recv(8).strip();
doLoad = True;
if response == "NO":
# File transfer failed. Try one more time.
data = self.getfile(size);
sum = self.xmlHandler.checksum(data);
if sum != response:
# Two file transfers failed in a row.
# This server will e-mail the IT staff with an error.
# Until then, hold existing data in memory.
doLoad = False;
errorMessage = "An error occurred during a file transfer from the main server to this one. ";
errorMessage += "The checksum did not match on two attempts. ";
errorMessage += "Please check the main server and other servers.";
try:
errorMail = MailMessage(self.socketModule.gethostname(),
self.socketModule.gethostbyname(self.socketModule.gethostname()),
"ERROR",
errorMessage,
"SERVER ERROR");
if not errorMail.mail():
# The checksum failed and the mailer failed.
logPrint("File transfer failed and mail notification failed.");
except self.socketModule.error, e:
logPrint("Attempted to mail error notification but failed with error: %s" % (str(e)));
if doLoad:
logPrint("Received new file from main. Checksum: %s" % (sum));
f = open(self.xmlHandler.getDefaultFile(), "w");
f.write(data);
f.close();
self.xmlHandler.load();