long-polling

问题 I'm trying to download photos posted with specific tag in real time. I found real time api pretty useless so I'm using long polling strategy. Below is pseudocode with comments of sublte bugs in it newMediaCount = getMediaCount(); delta = newMediaCount - mediaCount; if (delta > 0) { // if mediaCount changed by now, realDelta > delta, so realDelta - delta photos won't be grabbed and on next poll if mediaCount didn't change again realDelta - delta would be duplicated else ... // if photo posted

问题 I'd like some clarification on the long-polling requests. I made a script for the long polling, I tried it on nginx (with standard configuration) and it works. I noticed some things. After 60 seconds if the server does not respond nginx returns the 503 error in the log browser, is possible (or should) not to never expire the request, but only when the server responds? If it is possible, how can I do? If not possible, do you advise me to stretch out the request until the server stops (60

问题 I'm trying to make a simple chat app on web, using long polling & php. Mainly I have 2 ajax functions on the client, 1. update : to update the chat messages. 2. send : to send message the user enters. The update function do a long polling, which is to wait until for 10 seconds or until new message is available. The send function writes to a database. My problem is, while the update function is running (long polling), the send function cannot run. And only after the update function has

问题 This is the question for my Java Chat application . I will call the pingAction() in my external Jquery when my application get initiated. The Jquery pingAction will be , function pingAction(){ $.ajax( { type: "post", url: "PingAction", async: false, data : "userId="+encodeURIComponent(userId)+"&secureKey="+encodeURIComponent(secureKey)+"&sid="+Math.random() , cache:false, complete: pingAction, timeout: 5000 , contentType: "application/x-www-form-urlencoded; charset=utf-8", scriptCharset: "utf

问题 I am using some comet techniques including long polling and forever frame. I am using iframes for cross subdomain stuff. The one issue that I ran into while implementing these techniques is when a user refreshes a page or navigates to another page causing a new request, the comet connection is kept open from the old page. My server (tornado) never receives a connection close and from my limited wireshark abilities I don't see any TCP fin packet sent. However, when I close the the browser, the

问题 I was looking for a simple framework for implementing Comet for my GWT application. I looked on gwt-rocket which seems to be non active, then on gwt-comet which is not active, then on atmosphere-gwt-comet which was moved into the atmosphere project, and finally - tried to actually download the gwt sample from atmosphere and work with it. :| I added the atmosphere-gwt-server and atmosphere-gwt-client modules (version 0.8.6) to my project and tried to make the existing atmosphere sample to work

问题 I am trying to implement long polling in my Spring-MVC Web App but it freezes my browser and other request after 4-5 continues AJAX requests.I have no clue whats goin on here is my relevant code. The controller method:(Server Side):- @Asynchronous @RequestMapping("/notify") public @ResponseBody Events notifyEvent(HttpServletRequest request) { Events events = null; try { events = (Events) request.getSession(false).getServletContext().getAttribute("events"); System.out.println("Request Came

问题 We have a web application that uses SignalR for its notification mechanism.The problem is when we are browsing our web application using IE ,SignalR uses Long Polling as its transport type thus sends back requests to our web server therefore Session never expires no matter how long the browser is idle. We were thinking that maybe we could catch the requests in Global.asax and see if they were from SingalR and set the session timeout to the remaining time (Which I don't think it's a

问题 I'm wondering how Google Analytics Real Time user interface works, what's the technique ? Do they use long-polling from the client to keep the UI statistics instantly up to date by delivering realtime information from the server to the client? I just open Chrome dev tool on network tab and there is a infinite request on https://www.google.com/analytics/realtime/bind Does anybody know the trick? It works flawless... 回答1: The below refers to how the real time data is collected, not how the UI

问题 I am trying to implement a long-polling solution in Swift using iOS 8+. While the solution undoubtedly works and leaves the main thread free for UI interactions, the memory usage climbs continuously so I am obviously doing something wrong. The class I have written is as follows: enum LongPollError:ErrorType{ case IncorrectlyFormattedUrl case HttpError } public class LongPollingRequest: NSObject { var GlobalUserInitiatedQueue: dispatch_queue_t { return dispatch_get_global_queue(Int(QOS_CLASS