client-server

问题 Is there some way or something similar like ucred for AF_UNIX in the case of AF_INET sockets ( TCP in my case) for finding out the UID of the client connected to my socket? There's also /proc/net/tcp but it shows the UID of the creator of the socket and not of the connected client . Thank you. 来源： https://stackoverflow.com/questions/44554362/how-to-find-the-uid-of-a-client-connected-to-af-inet-socket

问题 I have Hadoop 0.20 , i am starting it by running $HADOOP/bin/start-all.sh. Every demon is running but while datanode it throws error localhost: Unrecognized option: -jvm localhost: Error: Could not create the Java Virtual Machine. localhost: Error: A fatal exception has occurred. Program will exit. But i have installed java. [root@ulhshr1ld1 bin]# java -version java version "1.7.0_01" Java(TM) SE Runtime Environment (build 1.7.0_01-b08) Java HotSpot(TM) Server VM (build 21.1-b02, mixed mode)

问题 Under FireDAC, I have a TFDConnection -> TFDQuery -> TDataSetProvider in a server app and a TClientDataSet in a client app. They are connected through the RemObjects Remoting SDK. (The TClientDataSet.RemoteServer is set to a TRODataSnapConnection ). The TFDConnection may be connected to different database types. With the TClientDataSet code in the client, (how) can I determine the database type? For a simple app containing all these components I could scan the datamodule for a component of

问题 I am developing a server using python but the server can communicate with only one client at a time . Even if the server establish connection with more than one clients, it can't make conversation with all clients at the same time. One client should wait until the started conversation end, which may last for several minutes. This problem would create Tremendous delay up on the client which hasn't started conversation. So, how could I let my python server to communicate with more than one

问题 This question already has answers here : (java) ObjectInputStream deserializing wrong version of object [duplicate] (3 answers) Closed last year . I have the following problem. I can set the transaction state to be either "start, end or ongoing". I set this, then serialise my Transaction object over to the server, who retrieves it. Works like a charm the first time (when the transaction is in start mode), but then when I resend the object, this time in "ongoing" mode, the server continues to

问题 I have a client screen display a big list data in a JTable. The client is Swing application. It requests the data from a remote server. The list data need to be displayed in scrollable pagination mode. That means the rows should be requested only when user scroll the table (like the way Oracle Developer displays the queried data). So is the any good practice to follow? My 2 main concerning aspects are data requesting method (e.g. slice query, id caching...) and GUI handling. 回答1: SwingWorker

问题 I'm familiar with SOAP and Webservices for peer-to-peer or client/server messaging on other platforms. What is the Apple equivalent for messaging? I'm trying to put together an application server that will manage a collaborative work environment. It will have an average of 200 and maximum of 1000 mobile clients on a LAN. For example, one Mac and 200 iPhones. I'm planning to use Apple's Enteprise approach to distribute our private (commercial) app to each of our iPhones clients. The server can

问题 suppose i have a client which sends the request to server to generate numbers from 1 to 100 and send the response back to client. Assume that generating numbers from 1 to 100 is very tedious job and it requires lot of resources so my server will start generating the numbers and sends the numbers to client as soon as the number is generated on server, instead of generating all number and sending the response at once to client. It is something like flipkart page. if you open a page we can see

问题 I’ve read some articles about client-side prediction and server reconciliation but I'm missing some parts, I take the part of client side prediction but I don’t understand how exactly is reconciliation done. I’ll take these two pieces of well-known articles as reference: http://www.gabrielgambetta.com/fpm2.html #2. So applying client-side prediction again, the client can calculate the “present” state of the game based on the last authoritative state sent by the server, plus the inputs the

问题 I learned that Server application makes a ServerSocket in a specific port, ServerSocket ServerSock=new ServerSocket(9000); and client makes a socket connection to the server application, Socket sock=new Socket("127.0.0.1","9000"); So client knows the Ip address and port of the server, I'm confused how and when the server gets knowledge about the client. Please help. Thanx in advance !!! 回答1: The Server is 'listening' for incoming connections from clients. Just imagine the port number as being