This is what I want
A user(bot) that always shows status Online
When a message comes for the user, I will hit a webhook associated with the user
The response from the webhook request will be sent as reply to the sender
This user will be able to intercept any message (let's say for profanity moderation)
This user will be able to send message to anyone (let's say broadcast)
This user will come in every users roster as default(like echo bot of skype)
I can't seem to find any resource on how to achieve this. I've found a way to intercept the incoming packet in openfire but I don't see any easy way to do this with MongooseIM. I haven't started diving deep into the source code yet, still looking for a way to do this without touching the source code and locking myself to a specific version of MongooseIM.
Disclaimer: I'm on the MongooseIM core team.
There are multiple ways this could be achieved. The easiest way to achieve this depends on your familiarity with Erlang, the programming language MongooseIM is written in.
You won't need any Erlang to use the event pusher module with its HTTP backend and the default settings, but you'd need some Erlang to control what messages get forwarded to the HTTP service or to make more complex setups. To send messages back, you'd either need to use the MongooseIM REST API or connect as an ordinary XMPP client to the server using one of the many XMPP libs available out there. This is probably the best approach to achieve your goal.
You can skip using the event pusher and just connect your bot as an XMPP client written in any language whatsoever. The bot might have your business logic within or can forward messages it gets to the HTTP service.
If you're comfortable working in Erlang, then the mechanism to extend the server is called Hooks and handlers and is described in the official MongooseIM documentation. This requires writing code in Erlang and building from source, but does not necessarily require modifying upstream MongooseIM code.
You could use the XMPP component protocol, which allows to extend the functionality of an XMPP server, yet structure it as multiple services. The components may be written in any technology you want and the most popular XMPP libraries should support the component protocol out of the box.
Depending on your choice from the above list and the language and environment you prefer, you might have to pick an XMPP library to use. There are XMPP libs available for iOS (ObjC and Swift), Android (Java and Kotlin), Python, JavaScript, C, and even some emerging ones for Rust, Dart and possibly more.
I need to transfer files to a user connected to a XMPP Server.
The file transfer is supported by Spring Integration XMPP? (The current release version is 4.1.6-RELEASE, the snapshot is 4.2.0-SNAPSHOT).
I succesfully send text messages using the XMPP Message Outbound Gateway using a configuration like this:
<int-xmpp:outbound-channel-adapter id="outboundEventAdapter"
channel="outboundEventChannel"
xmpp-connection="testConnection"/>
Using this Outbound Gateway I'm not able to send files (only String and org.jivesoftware.smack.packet.Message payloads are supported)
Thanks in advance.
Massimo
The Spring Integration XMPP module is fully based on the Smack library, so I'd be glad to hear from you or from anybody else who confirm and show us how to do that with Smack first of all.
And only after that we will be able to come with some adaptation from our perspective.
Please, refer to Smack XMPP File Transfer for more information.
From other side if you are able to come up with some solution on the matter you always can wrap it to the standard <int:service-activator> to make your application working.
How to implement a bot with ejabberd?
The idea is that on my (Debian 7.0 Wheezy) VPS, I'm running ejabberd and there I have a special bot Jabber user with limited set of commands that he can run. Let's call him butler#myvps.foo.
On another box (say, my android phone), I have a Jabber client connected to my account at possibly a third party server. Let's call it me#somewhere.bar.
Now I want ejabberd to:
allow only one specific Jabber ID, me#somewhere.bar to ever communicate with this
butler#myvps.foo.
have everything typed into chat with butler#myvps.foo passed to shell and executed
as a command, possibly in a chrooted or another protected environment (e.g. using
a specific limited user). (And the STDOUT + STDERR returned as a reply, of course.)
I understand there can be security risks, but for now I just want to know if this the way to go.
You can simply write a bot in any language and have it connect to the XMPP server as a client. A list of XMPP client libraries can be found here.
The bot can check the JID in the 'from' attribute of messages it receives to verify identity. It is not generally possible to forge a JID in XMPP, as servers authenticate their clients and also each other. In reality however it is only as secure as the authentication methods used (and the server containing no bugs).
To execute commands and read the results, a PTY is a good easy solution. There are PTY libraries available in many languages, including Python, Ruby and Lua.
You are right that security is an issue, as with any system. Years of effort have gone into securing ssh, and issues still arise occasionally.
It is worth noting that Google's XMPP server does not support encryption for server-to-server connections, so someone on a network between your XMPP server and Google's would be able to see your messages, and potentially modify and/or forge them completely.
And finally, even if they did support encryption for the server-to-server link... Google themselves technically have the ability to send messages as you, and your phone would also be a potential weak point.
Isolating the target process will remove a lot of security concerns. If the server runs on Linux, LXC containers might be a good solution for you.
Hopefully this covers all aspects of your question!
I am tasked with creating a text messaging system with low bandwidth server to server connections. The other developers already use protobuf to send data for other parts of the system between these same server locations, and it would be helpful to continue that trend for the text messaging portion. Server to client connections are not bandwidth constrained. It would be great to be able to use an unmodified chat client and openfire xmpp server.
What is better to program in this situation, a component for openfire or a transport for Kraken?
Have you tried enabling XEP-138 compression on the server-to-server link? Even if OpenFire doesn't support XEP-138, it will be easy to add, and should provide better results that almost any naive translation to protobufs.
Beside the obvious person to person instant message chat, What else have you used a Jabber server's functionality to enable?
Edit: links to working code to really show it off are particularly useful - and will be more likely to be voted up.
There are unlimited uses for XMPP/Jabber.
Take any message/data you want to send somewhere else and you can use jabber. Run a centralised logging service for distributed services? You can jabber the massage.
You want to check if your services/programs are running? XMPP presence will tell you. If you add custom status messages you can see exactly what is going on.
This is why Cisco has got into the game. Picture a server farm where each blade has a built in mini jabber client. On boot up it will register it's presence to the central server as awaiting work. The central server fires off some work in it's direction and it then changes it's status to "Busy". Another blade finished it's work and changes it's status back to "Available"... rinse and repeat.
When you combine the actual jabber messages with it's Out Of Band abilities, these servers can post where the results of the job can be found.
Anything you can think of needing to pass a message can be done with XMPP to some degree. Be this person to person, program to program, or any combination.
You could use a Jabber server to handle/broker messages between a client application and another server application.
It can actually be pretty effective.
Not me but Martin Woodward used jabber to control a "build bunny" that displays the current status of the build server.
http://www.woodwardweb.com/gadgets/000434.html
XMPP is good for sending messages back and forth between computers that don't need to be broken into chunks. They also can't be terribly big. If you use the right library, it can be pretty easy to set up.
Sending messages to a web page. Proof-of-concept: esagila.com
I plan to use it to receive notifications from my system, such as:
Process did not finish
Report was not generated on time
User needs help
I already receive many of these messages as email. But receiving an IM could be much more effective.
You might want to look at Vertebra which is...
a framework for orchestrating complex processes in a Cloud. It is designed with an emphasis on security, fault tolerance, and portability.
From the knowledge base:
Why was XMPP chosen for Vertebra?
XMPP based instant messaging can be a good alternative to search engines for information that is small, complete in itself and required frequently and repeatedly. For example, your daily horoscope - you require it daily and it is not large.
To see an example of this add astro#askme.im to your list of contacts in your jabber client (Gmail Chat/Gtalk/or any other Jabber client) and then initiate chat with this contact by sending the word "help".
Also see www.askme.im for a whole list of chat based solutions.
I've used Jabber in the past to get email notifications. Nowadays I use it for low-priority nagios notifications, it is very useful and way cheaper than SMS:
We use xmpp as both a 'bus' and a real-time API at http://superfeedr.com
Iowa State University Department of Agronomy has created this with Jabber: http://mesonet.agron.iastate.edu/iembot/
If you're a weather freak like I am, this is VERY cool stuff!
Apple implements mobileme's push service using Jabber/XMPP's subscription services to send push notifications. That is the most widespread use of Jabber for non-IM purposes I know of. This article has more details.
My friends have also built a Jabber python bot, which is kinda cute but not all that useful :-)
Edit
The most recent Next Big Thing, Google Wave, uses Jabber under the hood. Further illustrates the power of the protcol.
We have used XMPP and BOSH to enable users to communicate with a webbrowser directly and in realtime from their phone.
For example Code you can view our open source API
The vooices site also has live examples where you can control a map and play a game using your phone via your web browser: http://www.vooices.us/
I've always thought XMPP would be a good way to deliver SNMP data. OIDs are really painful, much of the system is insecure, and the SNMP traps never work quite like you want them to. With an XMPP server in the middle and a smart component to make some choices, you can use it to send out jabber or other notifications, kick off restart jobs, update web pages, or whatever else you need.
The XML data is pretty small in this case, and you can have the one XMPP server both talk to humans in message stanzas, or computers with the same protocol.