Does anybody know of a good sample project of a simple web server in Nim that also supports web sockets?
Here is a fairly basic package to do this: https://github.com/niv/websocket.nim.
I successfully used it in some JavaScript games already.
Related
I have been working on a mobile app that sends an ajax call to the server and waits for a response from the server in json format.
I am wondering from the server side, how to respond to an ajax call? Could someone give me an example in code?
I check the server code of my project (written by other members of the team) and could not understand it. I can only see it is written in java and also some keywords such as apache, springframework, etc pop up. I am a total newbie for server side programming and I want to learn more about it. Could someone give me some tips on how to get started with those as well? How does a server work? Is it just like responding to various request? What language could you use to build it and what is Apache? I know this looks like a lot of questions so probably I need to get some basic knowledge first. Any help/tips/suggestions on readings is appreciated.
This is kind of a broad question, as there are a lot of different server-side technologies that can handle server side AJAX requests, but if you want to go the Java route, using Spring Framework makes it very easy.
Spring Framework is a large open-source Enterprise Java framework that has a variety of features which entire books rarely even cover.
(Apache is an open-source project that contains over a hundred different sub-projects, the most popular being a web server.)
Spring does have some specific tools to handle REST calls. Assuming your AJAX is making a REST call (which is what it sounds like), and your project is already using Spring framework, it is fairly straightforward (assuming you already know Java). The Spring framework handles all the hard stuff for you. There are a few different ways to do this using Spring, but check out this link for creating a simple REST service:
https://spring.io/guides/gs/rest-service/
Another route would be to look into PHP, which is a server-side scripting language. With PHP, you can handle AJAX requests without the need for an application server (most basic web servers speak PHP). There are plenty of good resources for this, but one of my favorites is http://www.tutorialspoint.com/php/
BTW - the TutorialsPoint site is great for Java and Spring as well
I'm developing a scholar project where I have a core written in Ada language that generates data information.
As requested by the project, I need to send all the new produced information, with a certain period, to a remote webserver via websocket.
In javascript language is really easy to connect to a web socket:
var exampleSocket = new WebSocket("ws://www.example.com/socketserver", "protocolOne");
I would be able to execute a similar command in Ada, is it possible?
May be possible to workaround the problem calling an html page (with GET parameters) containing javascript code so that this page manages the websocket with remote webserver?
For those still looking for this answer; AWS now supports websockets...
https://docs.adacore.com/aws-docs/aws/high_level_services.html#websockets
Both AWS and Black has supports websockets. AWS is the most mature of the two, so I suggest that you use that.
I had Mobile project using Titanium which need Chatting functionality so i found two way to do that...like using socket programming and by using Web services so which way is better and what are the Requirements for Sockets Based programming .....plz Help me.....
i had got reference for code
https://github.com/appcelerator-modules/ti.cloud/tree/master/commonjs/example/windows/chats
but i confuse which way i have to fellow ...
Dilip
If you want to implement chat application you have more option to do that.
I have already do that with socket.io that is really fine for me and also helps me a lot. And its very speedy .
And i have also experience with cloud that is also good but as per i say that socket.io is good compare to webservices.
Socket.io In Appcelerator
Prefer this it really helps you to you to understand socket.io
Socket.io
Thanks,
Dharmik
My first post.
I have experience of basic java servlet and jsp and have got my webpage implemented in tomcat7.
Regarding Websocket, I am finding difficult to build understanding of how to implement it, i want to use tomcat8 implementation of websocket api and uplift my webpage (jsp, java, jquery, tomcat7) to use the websocket features, have not been able to find the the tutorial that can guide me through, something like hello world example. any pointers (sample codes, tutorials)?
have tried to understand tomcat8 examples but not understanding them at all
You need to understand that you don't just "add" WebSocket to an existing web application.. to make it faster, better, cheaper, more scalable, etc. Instead, you have to completely re-architect the web-layer of the application to take advantage of its capabilities.
I suggest that you first read a lot about WebSocket and what the whole idea is before you try to write any code, using Tomcat or any other WebSocket-capable server.
Nick Williams has a forthcoming book that appears to cover everything in the web application world, and as I understand it, will have a great deal of information about WebSocket-based code. You will unfortunately have to wait until March 2013 (at least) to use that particular book.
I'm sure there are similar books available, or even online tutorials to help get you started using WebSocket. Just be aware that switching to WebSocket isn't some simple configuration option: it's a very disruptive change to any existing web application.
I'm about to start a project for a client that has lots of data that needs to be real-time.
There are two mobile apps that I will be building with trigger.io, as well as a web UI, and all of these need to stay in sync.
I plan to use socket.io's WebSocket implementation with my Node.js backend for the webapp & mobile apps. This will work great on iOS and modern web browsers.
However, Android's webview does not support websockets at all. And it would simply destroy the mobile app user's data plan if socket.io used its long-polling fallback on Android.
I was wondering: is there any possibility of an implementation of Java WebSockets for trigger.io Android, then exposing that to the WebView? There is a simple implementation for phonegap
I suppose I could write a trigger.io plugin for it - but I want to be sure before I jump in to this project if this is feasible / not too hard to write a plugin for.
I used trigger.io long ago, but not since all the fanciness came out like native plugins.
If using an HTTP fallback solution isn't an option (I'd do some calculations to determine if a streaming or long-polling solution would really "destroy the mobile users's data plan") then the best solution to add WebSocket support would probably be a trigger.io plugin.
At Pusher we used a Java wrapper in PhoneGap in order to get our JavaScript library to work. However we've since added HTTP fallback so I wouldn't recommend anybody use this now. The project is here:
https://github.com/pusher/pusher-phonegap-android
The problem with the Java wrapper here (we use websocket-android-phonegap) is that it doesn't support SSL connections (if I remember correctly) and it hasn't been updated for a long time.
With that in mind when we created the Pusher Java library (which supports Android) we used the WebSocket client in Java-WebSocket because it's being actively developed and supports SSL connections. I'd recommend it.
I'd be interested to hear about the support that https://github.com/mkuklis/phonegap-websocket provides.