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How does netty server supports both Http and Https protocols with a single port? [closed]

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Closed 4 years ago.
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As we know,we provide http service listenning at 80 port,https service listenning at 443 port. Why don't we provide two services on one port? What is the specific reason? And how does netty server supports both Http and Https protocols with a single port?

You can do this but I think its a bad idea as both ports are well defined for either http or https. That said if you really want to do this you can detect if SSL is used or not based on the first 5 bytes of a message and then inject the SSL handler on the fly.
Netty itself includes OptionalSslHandler which does exactly this for you:
https://github.com/netty/netty/blob/netty-4.1.32.Final/handler/src/main/java/io/netty/handler/ssl/OptionalSslHandler.java

How to run node.js, Java and PHP application on same server and same port [closed]

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Closed 6 years ago.
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How to run node.js, Java and PHP application on same server and same port, I was trying to run but unable to run.

You need some kind of HTTP proxy layer in front of all this, typically Apache httpd or NGinx. From there you can configure different paths to go to different applications if necessary.
The configuration directives vary considerably depending on the solution you're using, but you can have / go through to PHP and /node go through to Node, while /java goes somewhere else entirely. Just make sure your sub-components are using non-conflicting paths so they can all play nicely together or you'll have to do a lot of ugly URL rewriting.

You could use the varnish cache as a load director and set up different back-ends for each of those servers. Then you could parse the incoming urls to redirect to the appropriate application server. You can absolutely run all of those app servers on the same machine, with varnish listening on one port, and all the other services listening on other ports. It would be easy to firewall those services from external access as well.
Running each service on different machines is also entirely possible and easy. We've used this solution numerous times in different environments because Varnish is extremely light-weight, reliable, and does not have the overhead of a web server such as Apache or nginx which, while good options, can be overkill.
You also get the added benefit of the robust caching it provides. Bonus!

Sending new data from Java program to web browsers [closed]

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I want to code a java program which must be able to communicate with web browsers (the clients). Sending data / answering requests is not a problem but I also want to send new data to the clients (so that they see it in their browsers without reloading the page).
What ways are there to accomplish that?
Is there any way to listen for new data (with JavaScript)?

i think what you are talking about is server push.
ie server will send data to client without polling from client.
There are various ways to do this one of the best way is through websockets.
you can use many java server available for websockets and have connect client for asynchronous push. while at client normal javascript will be able to receive the message.

What you're trying to do is called Reverse Ajax: Sending data from the server to a JavaScript-Enabled client (as opposed to a Regular Ajax, when the Client is the one that starts the communication). There 's a nice article on DeveloperWorks that can introduce you into the subject.
There are several ways to accomplish Reverse Ajax, and them imply some customization in both Client Side components (i.e JavaScript) and the Server Components (Java in your particular case). As WebServer says, WebSockets is one alternative -although is not supported by all browsers yet- but another viable solution is using Comet. If you're using Tomcat, this link might help you.

How does an application communicate with a webpage/server [closed]

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I want for my java application which I have started to develop to 'communicate' with my webpage. However I have no experience with webpages and would like to know how things such as login using user/pass verification works. Any links to tutorials, where to start, and clarification would help me a lot! Thanks :)

Yes,You can use form at client side for send data to server side..
at at server side you can catch data by using getParameter method.

You can communicate via AJAX
You can store data in session.setAttribute('name', name) / session.getAttribute('name')
You can pass some data in GET-parameters (request.getParameter('userID'))

If you want to develop a simple web application with login functionality, you need to know following. You might want to start from
here
Java
Database (RDBMS or NOSQL)
HTTP Servers/ Request / Response
If you have already developed web app providing some service (such as REST services), you can develop a web client using jquery/backbone.js.

proxy server configuration [closed]

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I am assigned to implement (or better configure) a kind of http proxy server. The server should support processes like described below:
-A user opens an URL in his browser which has the following structure: http://:/resource_name
-Proxy server validates the resource name in the URL of the incoming http-request and determines the URL of a web-resource it should forward the original request from the client to
-Proxy server forwards the original request, waits until it gets an answer from the external web-server, and posts it back to the user
I'm working within java, but I wouldn't like to implement a proxy server by myself playing with sockets. Instead I'd like to use an apache http server. Does anybody know if its possible to accomplish such a task on the configuration level using apache http server? If so, how?
Thank you in advance for your answers!

You can do this in Apache using the modules mod_proxy (to proxy your requests forward) and mod_rewrite (to map your external URL to the URL on your application server)
http://httpd.apache.org/docs/2.0/mod/mod_proxy.html
http://httpd.apache.org/docs/current/mod/mod_rewrite.html

Apache is not written in java. Your chances are good with Tomcat or Jetty.
You will need to implement a webapp with a Servlet intercepting all requests and then handle all your custom logic in the Servlet.