How can I create a global roster for any new registered user in ejabberd ?
I want to add user to the roster as soon as it is registered.
I cannot use the shared roster list as i want a one-to-many relationship sort of thing.
user(admin)<->all users.
ejabberd shared roster support is not necessarily symmetric.
You can define shared roster where admin is autorized to see presence of all users and not the reverse.
Please, check ejabberd shared_roster documentation: https://git.process-one.net/ejabberd/mainline/blobs/raw/v2.1.11/doc/guide.html#modsharedroster
If you use special alias, like #all#, the shared roster will be purely dynamic and will include all users on the server at retrieval time.
Related
Imagine that a database connected to an XMPP server stores users, it also stores an extra data column (let's call it dataId) for each user. The data column can take on three values: 1, 2, or 3.
In an XMPP client that logs in to the server, a list of users is displayed along with their XMPP presence status. The list displays users that all have the same value of of dataId. The client can change the dataId value that is displayed, meaning that if he switches the value, then the user is now somehow subscribed to the presence of the new list of users, but not to the old list of users.
I wonder if someone with experience with XMPP has a suggestion as to which XEPs or corresponding eJabberd (or Prosody) modules could be used or are best suited for this type of functionality.
I am slowly going through the XEPs, but there are a lot of them, and it's not clear as of yet which modules could be used, or if I would perhaps need to set up some custom code on my XMPP server to handle this.
You can take a look at XEP-0140. This behaves similar to rosters except that all users in a shared roster group will be able to see all other users in the group. You can create multiple shared roster groups and easily switch a user between them by adding or removing the user from the group. You can also have nested groups. You can look at the example on using shared roster groups for different cases here, using ejabberd.
I am implementing xmpp chat server with openfire and mysql. Openfire does create a lot of tables in the db. It has roster table but only adding rows there doesn't creates roster where as adding rows in the user table creates the user and I am able to login with the user. So my question is does openfire stores the rosters anywhere else because if I delete the entries from the roster table it still shows previous roster.
Deleting roster does reflect on the roster but it will take some time as openfire store cache. If you go to Server manager->cache summary you can see the list of cache. Just delete the Roster cache, you can see that roseters are same as it is in the database. i don't think openfire store roster values anywhere else. And if you add/delete roster do it with User service plugin or make your own plugin with java don't just delete/update it on database.
It likely caches the roster in memory. If you were to stop the server, make the database change, then start the server, you might see the changes reflected. That doesn't work well in practice, so you may need to use protocol to change the roster.
Generally in messenger services, user adds or deletes contacts and let knows server about it. Server then takes necessary actions.
However, our requirement is "server decides contacts list, makes roster changes accordingly and clients receives updates about the same". How can we achieve this in Tigase?
There is a dedicated API in the Tigase just for that. It is called a DynamicRoster. Maybe the name is the most accurate. Dynamic because it is managed by the server and it can change any time user requests the roster.
Anyway, there are code examples in the Tigase main code repository. You can have multiple dynamic rosters active at the same time and they can retrieve contacts from different locations.
There is also a roster protocol extension which allows you to keep extra information for the contacts in the dynamic roster such as phone numbers, etc... More info about this o the Tigase.org website in the devel guide section.
Hope this helps.
I'm learning XMPP and I repeatedly see the word "Roster" but I have no idea what it is.
contact list (in XMPP this is called a "roster")
Source: XMPP-IM - RFC 6121 ยง 1.3: Requirements
In XMPP, one's contact list is called a roster, which consists of any number of specific roster items, each roster item being identified by a unique JID (usually of the form contact#domain). A user's roster is stored by the user's server on the user's behalf so that the user may access roster information from any resource.
Note: There are important interactions between rosters and subscriptions; these are defined under Integration of Roster Items and Presence Subscriptions, and the reader must refer to that section for a complete understanding of roster management.
See http://xmpp.org/rfcs/rfc6121.html#intro-requirements
Let me know if anybody have any queries regarding xmpp/chat app in Android.
Roster is the name given to the list of contacts which appears in one's chat client
http://www.adarshr.com/fun-with-xmpp-and-google-talk-part-2
I am working on a social network that should allow members to chat with visitors on the site. The concept is simple.
Users who have registered signup get their own account with rosters
When a visitor comes to the home page of the social network, he can see some of the online members of the community
Now he should be able to initiate a chat with them, by clicking on their name.
I have already got members to chat with their roster mates. My question is, how can I get an anonymous user to chat with a member and exchange presence info with him?
I have successfully managed to create anonymous accounts, members accounts and even send messages from an anonymous user to other members. But I cant get presence information from anonymous-user to member or vice versa?
BTW, the chat is JS based.
You're trying to break the XMPP model. Presence is an opt-in permission based system. You ask me if you can see my presence, I say yes. Generally my client will then automatically ask you if I can see your presence, and your client says yes. That's what the roster is -- yes's and no's to presence subscription requests.
You can make chat rooms (MUC, multi user chat) that are anonymous, as well as do presence in them. It's not a roster, though. It's the closest to what you're describing without going into crazy-land with pubsub, and I don't know if you could even bend that tool far enough to have anonymous roster entries.