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Questions tagged [long-polling]

In web programming, long-polling is an emulation of pushing data, implemented by repeated polling with delayed response.

Long polling is itself not a true push; long polling is a variation of the traditional polling technique, but it allows emulating a push mechanism under circumstances where a real push is not possible, such as sites with security policies that require rejection of incoming HTTP/S Requests.

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Django Comet/Long Pollling application

I am working a real-time lighting control system. User can turn on/off lights through web interface, but when another person turn on/off light switch manually the web interface should be updated immediately. That's the real-time goal I want. The…
Jiechao Li
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Reducing traffic and server pay load when polling .NET web service

I have an Android (business) application which should create a notification and later update its content as soon as possible specific data changes on the server side. The data is accessed through a .NET REST style web service hosted in IIS, which…
Diego Frehner
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how to find out how many online user with long polling method?

i need best way to find out how many people are online with long polling method. why i need long polling method to acquire that? i need to know how many person are online in my site.of course i can do this with some query and update it in my site by…
HiDd3N
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IIS long polling AsyncController

I ran into an interesting problem in IIS and I would like to get to the bottom of it. I have an app that long polls . i have implemented my own long polling. A request comes in. I block that req and write to it from my worker thread. then…
Evren Bingøl
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Why this long polling is not working?

I am only getting first time message and then code stop working. I am newly learning long polling(I know,there gona be lot of errors and stupdity also ).Plz help. Jquery function is here. var timestamp = null; var last_msg_id = 1; function…
Aana Saeed
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Controlling just an element from an existing page with nodejs

I'm having a web application build in PHP and I would like to add some real-time functionality to it. What I actually need is to control jut some parts (notifications "elements") of an existing page with nodejs. Would that be possible? I don't want…
sica07
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JSF: poll server, render button/link, so user can refresh view

The most popular page in my JSF/PrimeFaces web app is a page with p:dataTable with data spanning date ranges (and yes, FROM and TO p:calendar are used for filtering the data along with p:inputText and p:autoComplete components, when/as necessary). I…
Howard
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Is this a legitimate long polling approach?

Is this PhP script a legitimate approach to long polling or is this to heavy on the server? $FoundNewContent = false; $tokens = array(); while(!$FoundNewContent) { usleep(300000); clearstatcache(); $SQL1 = "SELECT * FROM tokens WHERE …
matteok
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How to fire off and poll a windows service from asp.net page

client wants an asp.net page that has a button to fire off a database update from an external source with hundreds of records. This process takes a long time. He also wants status update as the process runs, like "processing 10 out of 1000 records".…
user204588
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WebSockets/Long-Polling on ASP.NET - Shared Host?

I am building a website that will be handling many persistent connections - either through long polling or WebSockets (if I get a host that has IIS8). My question is, are either of these viable on a shared host? Or do I need a true dedicated server?…
user1032657
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tornado framework doesn't push data from server to client

I've tried to modify an example from "Building the Realtime User Expereince" by Ted Roden to send live twitter data to a client pushed by a server. My app has a class that makes a call to the Twitter Streaming API via tweepy and filters the results…
user94628
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Node.js options to push updates to some microcontrollers that have an HTTP 1.1 stack

The title pretty well says it. I need the microcontrollers to stay connected to the server to receive updates within a couple of seconds and I'm not quite sure how to do this. The client in this case is very limited to say the least and it seems…
kjs3
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Using script tag to pass arguments to JavaScript

I need to implement a cross-site comet http server push mechanism using script tag long polling. (phew...) For this, I dynamically insert script tags into the DOM and the server sends back short js scripts that simply call a local callback function…
Markus A.
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Admin controlled page force refresh

Basically, for a website I'm playing with, I would love to craft a back-end admin controlled panel where I can click buttons that will fire events on a front-end facing page for clients. I am running an apache server and coding exclusively in…
tr3online
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Sending notifications to the client when a job completes

I am writing an internal web application using Spring MVC where a user will submit a set of jobs to be completed via a RESTful web service. Each job will only take a few seconds to complete but a user could submit dozens of them. I want the option…
Eddie
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