I'm wondering if it is possible to host an Application Server on Google App Engine, I'm not planning to host a Web Application, but yes an App Server.
For example, hosting a Chat Server, that would Authenticate users log ins, register new users, establish a connection between two users running on clients developed to work with that Server.
If not, is there a similar service to GAE which I can use for that purpose.
Thanks a lot.
The XMPP and Channel APIs should let yo do it. If your client can make HTTP requests and your server can respond to them, then yes, you should be able to do it.
Yes this is possible.
Have a look at the Google Docs for an introduction to what the platform looks like and what APIs are available. And crucially what restrictions there are. For chat applications you might be interested in the Channel API.
Related
I'm developing an Android application and want it to connect to an OpenVPN Server.
Since Android 4.0 there is a VPNService class. This class however needs to intercept all the network packets(and require special permissions) because it is apperently running on the Internet Protocol. However as far as I understand, OpenVPN is running on-top of TCP or UDP(my server is configured to use UDP). I only need to tunnel the traffic from my own application through the VPN tunnel.
Shouldn't it theoretically be possible to avoid this(because I don't need to intercept all the traffic, but only the UDP-OpenVPN packets targeting my application)?
Do you know of a library for Android that fulfills my needs?
If not, would it be possible to implement the OpenVPN protocol in Android on-top of UDP without the need of the VPNService class?
I found the follwing project: ics-openvpn. However it also uses the VPNService class and intercepts all the packages.
Sure, you can theoretically do UDP/OpenVPN in userspace/inside your app. But you would need to implement the whole TCP/IP inside your app since you need to emulate the whole VPN stack.
For a one app VPN like solution you are probably much better of using a SOCKS/HTTP proxy etc. library.
You need to use VpnService for creating an application of OpenVPN which takes ovpn file as input for configuration on client side like OpenVPN Connect. So any person can change configuration according to their need. Also, you have to configure the server for OpenVPN. Take server of AWS EC2 or any other. While in configuring VPN on server side follow this link.
By looking to this URL I know we can connect to XMPP server using this link
Good XMPP Java Libraries
but I want to create my Own XMPP server, currently we have Openfire, tigase and many other Servers available. but is there any Libraries and tutorial are available for making an XMPP server from scratch?
I want to make a server that can handle all web, client application, Android and iOS requests (for Chat and other purpose).
WebChat is perfect for this . You will have to download Openfire Server which is open source XMPP Server , then install Webchat over it , which will provide a web based interface to chat . You can use Android WebView to customize look and feel in an Android application
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 little question about an android app with a function "remote" use via internet.
So I have these ideas:
Create a webservice using php on the server, and refresh the client app all x time like 4-5 sec
Or make a java server (so I don't know how I can do that)
I just want make a remote connected via user/password to the server and the other app connect to the server and refresh his status.
Do you know the best way for do that?
Thanks
The question is not very precise, but as far as I understand it, both your ideas implement the 'pull' concept, that is the client app checking the status of the server every now and then.
If you want the app to be instantly notified of the server status change, I would suggest push notifications with GCM (Google Clound Messaging). You can find some basic descriptions and examples at: http://developer.android.com/google/gcm/index.html
Sending a server-to-client notification is simple regardless of the platform you use server side. E.g. for PHP integration with GCM, check out this thread: GCM with PHP (Google Cloud Messaging)
I currently have a working CTI integration on a Samsung phone system, within our business. Our desktop clients are running bespoke java clients which receive messages from our bespoke server application which connects to the Samsung DCS System.
We are getting a new Avaya phone system in shorty and I want to get this to work with our existing desktop client system. Therefore, I do not wish to install anything new on the desktop clients. I want to write a replacement server application that connects to the Avaya, and then uses the current message process from server to client.
Can someone please let me know what API I should be looking at to write this server based application. It must be Java based.
The two key things required are;
1. The server must be notified of all numbers ringing on all phones, so t can message the relevant client.
2. The server must be able to dial a number, on behalf of client phone, to an external number.
Any pointers in the right direction would be appreciated.
The API you need is JTAPI; you can find the documentation for it on Avaya DevConnect website: http://devconnect.avaya.com. You will need to register there but it's free.
You can also use the Avaya Device, Media, and Call Control SDK (DMCC) which is a newer, fully functional API covering media, monitoring, and advanced call control operations. See for more information https://devconnect.avaya.com/public/dyn/d_dyn.jsp?fn=353.
This API is hosted off of the Avaya Aura AE server (AES) which is deployed with Avaya Communication Manager. AES hosts a number of different API including TSAPI and Web Services. Investigate this platform and see if it meets your needs.