I'm building a web application that will run locally on each of the users' pc (local web server using Jetty application server). I want the users to be able to talk to each other (on to one, not group) using video and audio. The users can exchange messages between each other in a p2p way, but they don't have a central server that will host one application. Is this possible? Can users talk using opentok, from different applications? Is there another solution other than opentok? I'm looking for something free and open source.
Thank you
Opentok platform supports both P2P mode and using their servers... So you can use OpenTok for your application. I wouldn't recommend it... you won't have this back up.
Peer-to-peer streaming uses UDP. A firewall may block UDP and cause peer-to-peer streaming to fail. If peer-to-peer streaming fails, either when streams are initially published or during the course of a session, the session falls back to using the OpenTok servers for relaying streams.
P2P with Opentok
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How i can make my own push notification server for my android & ios application?
m not wanna to use GCM.
GCM and APN are the client side part of the infrastructure. You should still set up your own messaging server. That event-based server will then push messages to the clients via the proprietary infrastructure. I think applications should be respectful of their enironment, and using the push facilities of the platform is indeed a good thing for your users. Also, it should be even easier for you to implement, thanks to the standard setup and the working documentation.
Otherwise, just pick your favourite message queue middleware (Active, Zero, you name it) and integrate it directly with the native client for the supported platforms, without using GCM (or Apple push). But be warned that this will make your application less efficient, and you may face higher development costs to set up the background notification service.
Node.JS provide a module called SOCKET.IO. I use this in my android apps for live messaging. You can configure it on AWS, Digitalocean Or you can use Heroku.
Here is the good example of Socket.io with android http://nkzawa.tumblr.com/post/46850605422/connecting-to-a-socketio-server-from-android
Android chat app wit socketio
https://github.com/nkzawa/socket.io-android-chat
I'm looking to program a network application. I was going through: http://www.stanford.edu/class/ee368/Android/Tutorial-3-Server-Client-Communication-for-Android.pdf which talk about server and client programming for android. Now imagine I don't have an internet connection and I want both server and client applications run on either same android device or different android devices locally.
Is it possible to develop and run both server and client applications using TCPIP/UDP/Multicast locally on either standalone android device or multiple android device?
Yes, it is possible to communicate between Android devices or applications that are not connected to the Internet.
If you are using different devices, you probably want to use sockets, but it is possible to run an HTTP server on the server device and then use HTTP. Make sure they are connected to the same wifi network.
There are several different ways to communicate between different processes on the same Android device. The easiest might be to use a Messenger service but sockets and HTTP are also possible here.
Yes, it is possible in some manner.You can either use sqlite database present in android device to store various types of data in table form and data retreive from same.
Another way is to use Parse cloud as a server or backend of your client application.It allows your app to run even when you are not connected to internet.It stores the data in cache memory with its api and then uploads data to the server cloud as soon as you get connected to Intenet.
You can ask if you have any further queries. :)
I want to connect my android application to an applet which is running on my pc on Google chrome on Wi-fi.. where my phone works as a wi-fi hotspot and pc as the connected device. I want the connection to work uniquely as I want commands to be passed from my application to the specific applet, on the execution of which my applet does specific tasks. Please tell me the APIs which I can look in both Java and Android or the technology I have to use to make it work..
You need to use any program, such as wamp server, to make your computer to be a localserver. It will install PHP 5, MySQL and Apache. In other hand, you will also need a little bit of knowledge in Php language to create you own web services.
Another thing you need to be aware is that to handle you connection between server and device (and by this I mean which IP you are going to use) you will have a little headache; but first things first..break your problem in little parts thus will be easier to solve them.
I recommend this tutorial.
I think the simple way to connect these two softwares is using UDP.
It is fast, it is easy to program but it is generally unreliable according to TCP. But it is already local network. I dont think that is a case you need to take care in your local wifi network.
So take a look at this tutorial http://tutorials.jenkov.com/java-networking/udp-datagram-sockets.html
There are other ways like https://www.alljoyn.org/. It has more functinality but more complicated.
You must install Server on your PC(Apache httpd or apache tomcat or other based on your interest). A server listens to request from clients. When your mobile is connected to your pc(doesn't matter wire or wireless), you can make a request to an url(say, localhost:8080/welcome) from your app.
Create an applet and connect it with your web application(in the server) using java.net.URL and java.net.URLConnection.
On performing some operation on the client, call the url of the server application and forward the response to the applet.
I have a code running in router that sends UDP packets(using Sendto() function and a string of data) to a particular server whose IP address and port number I will mention in my code.
I want to deploy a server application that could receive a UDP packet and store its information on server or somewhere else not sure right now.
I have decided to use Google app Engine for hosting my server side code which most probably will be having something like recvfrom() function to receive string.
So how and by using what API's can I start developing my server side code.
Google App Engine has a Preview release of a Socket API, but it does not let you create listening sockets. See Limitations and restrictions section at https://developers.google.com/appengine/docs/python/sockets/
You cannot create a listen socket; you can only create outbound sockets.
You can use Google Compute Engine to run any reasonable software on Google's cloud platform, including programs that receive UDP datagrams. You must always pay for Compute Engine instances.
According to the newest edition of App Engine Socket docs for Java, if you're using java 8 runtime you should be able to use java sockets without limitations:
Applications in the Java 8 runtime default to using native Java
sockets with no restrictions: Google recommends that you keep this
default.
That means that it should be possible to use java.net.DatagramSocket or java.nio.channels.DatagramChannel freely to work with UDP.
I have a native application written in C++. I would like to write an Android application that would be able to comunicate with my native application when user is in connected to the same WiFi network as my PC.
How this things are done. I mean what technologies are used behind it. Maybe you have some samples?
You could use a peer-to-peer library, like AllJoyn from Qualcomm. The idea is that both your PC and the Android device will use TCP/IP to communicate with each other. You still need a protocol above that however that will handle discovery, session establishment and exchange of data.