network-programming

问题 We have a Netty (4.0.15) based Websocket server running on Ubuntu v10, and during resiliency testing we do: kill -9 server send some data from client expect writeAndFlush failure on client For some reasons sometimes we see: writeAndFlush success and then after java.io.IOException: Connection reset by peer So is it possible the writeAndFlush sometimes completes successfully even if the server is gone, whilst other times it fails? Maybe this occurs because of the schedule of the OS socket clean

问题 We have a Netty (4.0.15) based Websocket server running on Ubuntu v10, and during resiliency testing we do: kill -9 server send some data from client expect writeAndFlush failure on client For some reasons sometimes we see: writeAndFlush success and then after java.io.IOException: Connection reset by peer So is it possible the writeAndFlush sometimes completes successfully even if the server is gone, whilst other times it fails? Maybe this occurs because of the schedule of the OS socket clean

问题 I need your advice on a program I'm coding right now. Let me first present you what it is. Design I'm designing a man-machine interface (MMI). In this MMI, there are two core elements: The MainWindow : This MainWindow is the base of everything. Important : Here, I launch in a thread a server that receives the data from a client. This data is very important to the next element. Supervision This window contains a QTableWidget , the goal is to show in pseudo-real time the data received on the

问题 I do webservice requests with a UISegmentedControl , when I change segmentedItem and request fast the application crashes with this message: [Session started at 2011-05-12 10:58:50 +0200.] Terminating in response to SpringBoard's termination. [Session started at 2011-05-12 11:06:31 +0200.] GNU gdb 6.3.50-20050815 (Apple version gdb-1516) (Fri Feb 11 06:19:43 UTC 2011) Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are

问题 I am creating a network client application that sends requests to a server using a QTcpSocket and expects responses in return. No higher protocol involved (HTTP, etc.), they just exchange somewhat simple custom strings. In order to test, I have created a TCP server in Python that listens on a socket and logs the strings it receives and those it sends back. I can send the first request OK and get the expected response. However, when I send the second request, it does not seem to get written to

问题 I'm creating a client-server application and I'm just wondering about one thing. Client serializes Query object to String and then uses NetworkStream to send it to the server. Server reads bytes using GetStream().Read, writes it into a buffer, deserializes that string into a Query object and gets information stored in received query. Is it possible that Read() method could return partial message (that has not already arrived completely)? Or, for example, in case of immediate sending two

问题 I'm creating a client-server application and I'm just wondering about one thing. Client serializes Query object to String and then uses NetworkStream to send it to the server. Server reads bytes using GetStream().Read, writes it into a buffer, deserializes that string into a Query object and gets information stored in received query. Is it possible that Read() method could return partial message (that has not already arrived completely)? Or, for example, in case of immediate sending two

问题 I'm writing a simple program in Java that receives connection requests from a browser (like Firefox), parses the request for statistical info, then forwards the request to the original destination. The program then reads the response from the destination, parses the response for statistical info, then forwards the response to the browser. The pseudo code of this operation is as follows: // Accept connection from browser and read request 1. Socket browserConnection = serverSocket.accept(); 2.

问题 With TCP it is pretty easy because is connection-based and once a connection is established you can set up the SSL object associated with that connection once and stream data...UDP however is connection-less, so does this mean I have to set up a new SSL object for each UDP packet I get from a client? Is there a way I could use the same SSL object for subsequent reads from the socket as long as I'm talking to the same client? 回答1: Even with UDP you can still "bind" and "connect" a socket. If

问题 My question is based on the following understanding Socket is defined by ip:port. Both server and client will have their own socket Socket connection is defined by five touples server_ip, server_port, client_ip, client_port, protocol A socket descriptor is an integer value that identifies a socket I tried to implement my own server where socket() and accept() returns different socket descriptor value (Is it always the case?). My question is why is it said that accept() creates a new socket if