client-server

问题 This question already has answers here : Obtaining client IP address in WCF 3.0 (3 answers) Closed 2 hours ago . I have WCF service hosted as windows service, I am trying to get clients (WPF client) Mac address at server end (WCF side). I have tried using following line of code but it gives me IP address of client that too in ::1 format. RemoteEndpointMessageProperty prop = OperationContext.Current.IncomingMessageProperties[RemoteEndpointMessageProperty.Name] as RemoteEndpointMessageProperty;

问题 This question already has answers here : Obtaining client IP address in WCF 3.0 (3 answers) Closed 2 hours ago . I have WCF service hosted as windows service, I am trying to get clients (WPF client) Mac address at server end (WCF side). I have tried using following line of code but it gives me IP address of client that too in ::1 format. RemoteEndpointMessageProperty prop = OperationContext.Current.IncomingMessageProperties[RemoteEndpointMessageProperty.Name] as RemoteEndpointMessageProperty;

问题 If ESTABLISHED socket (after connecting from client via connect() ), exits and thus kernel closes all open file descriptor, what happens to the other side? If the client sends FIN and the server ACK it (which is just half-closed state), but the server tries to read() on that socket, what happen then? I can imagine 2 situation: the socket server read() s on, is closed also. But in the server side there is no exit(), so noone has closed that socket at that side. So here I do not know how server

问题 I have a web page where user uploads a video file using html's "input type = file" tag, I am catching that uploaded video file in JavaScript function variable where it is coming as blob URL. "blob:https://www.myownsite.com:8080/2e8cfd32-abf2-4db3-b396-91f76cc3b40c". I am not able to save this blob URL in my system. HTML code: <input type="file" name="video_file_name" accept="video/*"> <input type="submit" value="Upload Video" id="customVideoSubmit"> <button onClick="postVideo();" id=

问题 I want to extend my experience with the .NET framework and want to build a client/server application. Actually, the client/server is a small Point Of Sale system but first, I want to focus on the communication between server and client. In the future, I want to make it a WPF application but for now, I simply started with a console application. 2 functionalities: client(s) receive(s) a dataset and every 15/30min an update with changed prices/new products (So the code will be in a Async method

问题 I am working on a binary file transfer program in which the client has to upload a file to server. For this case, I need to send the file name first and file content second. But this is not feasible for me. Lets see the code: // Client-side code to send file name void sendFileName( int sd, /*Socket Descriptor*/ char *fname) /*Array Containing the file name */ { int n , byteswritten=0 , written ; char buffer[1024]; strcpy(buffer , fname); n=strlen(buffer); while (byteswritten<n) { written

问题 This seems like a situation that must be incredibly common, but I've yet to find a good solution to it. I'm a little new to modern Javascript, so please forgive me (or better yet, correct me) if I'm using the wrong terminology here and there. I'm developing a web application. It's got a server, running as Javascript (ES6, I believe - using import/export) in node.js, using express.js for a router (and built by express-cli). And it's got a client side, also Javascript, mostly Vue modules (and

问题 This seems like a situation that must be incredibly common, but I've yet to find a good solution to it. I'm a little new to modern Javascript, so please forgive me (or better yet, correct me) if I'm using the wrong terminology here and there. I'm developing a web application. It's got a server, running as Javascript (ES6, I believe - using import/export) in node.js, using express.js for a router (and built by express-cli). And it's got a client side, also Javascript, mostly Vue modules (and

问题 I am currently working on a registration form on a site, and I need to know exactly how to get the Timezone Offset for an active user-client to calculate his actual local time (no need for DST). I've tried the JS method using the function getTimeZoneOffset() but it seems that it not very recommended because it is relying on the user Time Settings. (I changed the clock time on my machine and try it) So any change in the user time settings will alter the timezone offset. Are there any other

问题 In Client: let userIdentity = { userName: "user1", password: "user1" }; session = await client.createSession(userIdentity); In Server var userManager = { isValidUser: function (userName, password) { if (userName === "user1" && password === "password1") { return true; } if (userName === "user2" && password === "password2") { return true; } return false;}}; When Clients create session with OPCUA Server, it will send userName/password Identity to activeSession on Server. How to I can know that