Net::XMPP::Protocol - XMPP Protocol Module Net::XMPP::Protocol is a module that provides a developer easy access to the XMPP Instant Messaging protocol. It provides high level functions to the Net::XMPP Client object. These functions are inherited by that modules. Protocol.pm seeks to provide enough high level APIs and automation of the low level APIs that writing a XMPP Client in Perl is trivial. For those that wish to work with the low level you can do that too, but those functions are covered in the documentation for each module. Net::XMPP::Protocol provides functions to login, send and receive messages, set personal information, create a new user account, manage the roster, and disconnect. You can use all or none of the functions, there is no requirement. For more information on how the details for how Net::XMPP is written please see the help for Net::XMPP itself. For more information on writing a Client see Net::XMPP::Client.

Modes
Several of the functions take a mode argument that let you specify how the function should behave: block - send the packet with an ID, and then block until an answer comes back. You can optionally specify a timeout so that you do not block forever. nonblock - send the packet with an ID, but then return that id and control to the master program. Net::XMPP is still tracking this packet, so you must use the CheckID function to tell when it comes in. (This might not be very useful...) passthru - send the packet with an ID, but do NOT register it with Net::XMPP, then return the ID. This is useful when combined with the XPath function because you can register a one shot function tied to the id you get back.

Basic Functions
use Net::XMPP qw( Client ); $Con = new Net::XMPP::Client(); # From $status = $Con->Connect(hostname=>"jabber.org"); # Net::XMPP::Client $Con->SetCallBacks(send=>\&sendCallBack, receive=>\&receiveCallBack, message=>\&messageCallBack, iq=>\&handleTheIQTag); $Con->SetMessageCallBacks(normal=>\&messageNormalCB, chat=>\&messageChatCB); $Con->SetPresenceCallBacks(available=>\&presenceAvailableCB, unavailable=>\&presenceUnavailableCB); $Con->SetIQCallBacks("custom-namespace"=> { get=>\&iqCustomGetCB, set=>\&iqCustomSetCB, result=>\&iqCustomResultCB, }, etc... ); $Con->SetXPathCallBacks("/message[@type='chat']"=>&messageChatCB, "/message[@type='chat']"=>&otherMessageChatCB, ... ); $Con->RemoveXPathCallBacks("/message[@type='chat']"=>&otherMessageChatCB); $Con->SetDirectXPathCallBacks("/anything"=>&anythingCB, "/anotherthing[@foo='bar']"=>&anotherthingFooBarCB, ... ); $Con->RemoveDirectXPathCallBacks("/message[@type='chat']"=>&otherMessageChatCB); $error = $Con->GetErrorCode(); $Con->SetErrorCode("Timeout limit reached"); $status = $Con->Process(); $status = $Con->Process(5); $Con->Send($object); $Con->Send("<tag>XML</tag>"); $Con->Send($object,1); $Con->Send("<tag>XML</tag>",1); $Con->Disconnect();

ID Functions
$id = $Con->SendWithID($sendObj); $id = $Con->SendWithID("<tag>XML</tag>"); $receiveObj = $Con->SendAndReceiveWithID($sendObj); $receiveObj = $Con->SendAndReceiveWithID($sendObj, 10); $receiveObj = $Con->SendAndReceiveWithID("<tag>XML</tag>"); $receiveObj = $Con->SendAndReceiveWithID("<tag>XML</tag>", 5); $yesno = $Con->ReceivedID($id); $receiveObj = $Con->GetID($id); $receiveObj = $Con->WaitForID($id); $receiveObj = $Con->WaitForID($id, 20);

Namespace Functions
$Con->AddNamespace(ns=>"foo:bar", tag=>"myfoo", xpath=>{Foo=>{ path=> "foo/text()" }, Bar=>{ path=> "bar/text()" }, FooBar=>{ type=> "master" }, } );

Message Functions
$Con->MessageSend(to=>"bob@jabber.org", subject=>"Lunch", body=>"Let's go grab some...\n", thread=>"ABC123", priority=>10);

Presence Functions
$Con->PresenceSend(); $Con->PresenceSend(type=>"unavailable"); $Con->PresenceSend(show=>"away"); $Con->PresenceSend(signature=>...signature...);

Subscription Functions
$Con->Subscription(type=>"subscribe", to=>"bob@jabber.org"); $Con->Subscription(type=>"unsubscribe", to=>"bob@jabber.org"); $Con->Subscription(type=>"subscribed", to=>"bob@jabber.org"); $Con->Subscription(type=>"unsubscribed", to=>"bob@jabber.org");

Presence DB Functions
$Con->PresenceDB(); $Con->PresenceDBParse(Net::XMPP::Presence); $Con->PresenceDBDelete("bob\@jabber.org"); $Con->PresenceDBDelete(Net::XMPP::JID); $Con->PresenceDBClear(); $presence = $Con->PresenceDBQuery("bob\@jabber.org"); $presence = $Con->PresenceDBQuery(Net::XMPP::JID); @resources = $Con->PresenceDBResources("bob\@jabber.org"); @resources = $Con->PresenceDBResources(Net::XMPP::JID);

IQ  Functions

Auth Functions
@result = $Con->AuthSend(); @result = $Con->AuthSend(username=>"bob", password=>"bobrulez", resource=>"Bob");

Register Functions
%hash = $Con->RegisterRequest(); %hash = $Con->RegisterRequest(to=>"transport.jabber.org"); %hash = $Con->RegisterRequest(to=>"transport.jabber.org", timeout=>10); @result = $Con->RegisterSend(to=>"somewhere", username=>"newuser", resource=>"New User", password=>"imanewbie", email=>"newguy@new.com", key=>"some key");

Roster Functions
$Roster = $Con->Roster(); %roster = $Con->RosterParse($iq); %roster = $Con->RosterGet(); $Con->RosterRequest(); $Con->RosterAdd(jid=>"bob\@jabber.org", name=>"Bob"); $Con->RosterRemove(jid=>"bob@jabber.org");

Roster DB Functions
$Con->RosterDB(); $Con->RosterDBParse(Net::XMPP::IQ); $Con->RosterDBAdd("bob\@jabber.org", name=>"Bob", groups=>["foo"] ); $Con->RosterDBRemove("bob\@jabber.org"); $Con->RosterDBRemove(Net::XMPP::JID); $Con->RosterDBClear(); if ($Con->RosterDBExists("bob\@jabber.org")) { ... if ($Con->RosterDBExists(Net::XMPP::JID)) { ... @jids = $Con->RosterDBJIDs(); if ($Con->RosterDBGroupExists("foo")) { ... @groups = $Con->RosterDBGroups(); @jids = $Con->RosterDBGroupJIDs("foo"); @jids = $Con->RosterDBNonGroupJIDs(); %hash = $Con->RosterDBQuery("bob\@jabber.org"); %hash = $Con->RosterDBQuery(Net::XMPP::JID); $value = $Con->RosterDBQuery("bob\@jabber.org","name"); $value = $Con->RosterDBQuery(Net::XMPP::JID,"groups");

Basic Functions
GetErrorCode() - returns a string that will hopefully contain some useful information about why a function returned an undef to you. SetErrorCode(string) - set a useful error message before you return an undef to the caller. SetCallBacks(message=>function, - sets the callback functions for presence=>function, the top level tags listed. The iq=>function, available tags to look for are send=>function, <message/>, <presence/>, and receive=>function, <iq/>. If a packet is received update=>function) with an ID which is found in the registerd ID list (see RegisterID below) then it is not sent to these functions, instead it is inserted into a LIST and can be retrieved by some functions we will mention later. send and receive are used to log what XML is sent and received. update is used as way to update your program while waiting for a packet with an ID to be returned (useful for GUI apps). A major change that came with the last release is that the session id is passed to the callback as the first argument. This was done to facilitate the Server module. The next argument depends on which callback you are talking about. message, presence, and iq all get passed in Net::XMPP objects that match those types. send and receive get passed in strings. update gets passed nothing, not even the session id. If you set the function to undef, then the callback is removed from the list. SetPresenceCallBacks(type=>function - sets the callback functions for etc...) the specified presence type. The function takes types as the main key, and lets you specify a function for each type of packet you can get. "available" "unavailable" "subscribe" "unsubscribe" "subscribed" "unsubscribed" "probe" "error" When it gets a <presence/> packet it checks the type='' for a defined callback. If there is one then it calls the function with two arguments: the session ID, and the Net::XMPP::Presence object. If you set the function to undef, then the callback is removed from the list. NOTE: If you use this, which is a cleaner method, then you must *NOT* specify a callback for presence in the SetCallBacks function. Net::XMPP defines a few default callbacks for various types: "subscribe" - replies with subscribed "unsubscribe" - replies with unsubscribed "subscribed" - replies with subscribed "unsubscribed" - replies with unsubscribed SetMessageCallBacks(type=>function, - sets the callback functions for etc...) the specified message type. The function takes types as the main key, and lets you specify a function for each type of packet you can get. "normal" "chat" "groupchat" "headline" "error" When it gets a <message/> packet it checks the type='' for a defined callback. If there is one then it calls the function with two arguments: the session ID, and the Net::XMPP::Message object. If you set the function to undef, then the callback is removed from the list. NOTE: If you use this, which is a cleaner method, then you must *NOT* specify a callback for message in the SetCallBacks function. SetIQCallBacks(namespace=>{ - sets the callback functions for get=>function, the specified namespace. The set=>function, function takes namespaces as the result=>function main key, and lets you specify a }, function for each type of packet etc...) you can get. "get" "set" "result" When it gets an <iq/> packet it checks the type='' and the xmlns='' for a defined callback. If there is one then it calls the function with two arguments: the session ID, and the Net::XMPP::xxxx object. If you set the function to undef, then the callback is removed from the list. NOTE: If you use this, which is a cleaner method, then you must *NOT* specify a callback for iq in the SetCallBacks function. SetXPathCallBacks(xpath=>function, - registers a callback function etc...) for each xpath specified. If Net::XMPP matches the xpath, then it calls the function with two arguments: the session ID, and the Net::XMPP::Message object. Xpaths are rooted at each packet: /message[@type="chat"] /iq/*[xmlns="jabber:iq:roster"][1] ... RemoveXPathCallBacks(xpath=>function, - unregisters a callback etc...) function for each xpath specified. SetDirectXPathCallBacks(xpath=>function, - registers a callback function etc...) for each xpath specified. If Net::XMPP matches the xpath, then it calls the function with two arguments: the session ID, and the XML::Stream::Node object. Xpaths are rooted at each packet: /anything /anotherthing/foo/[1] ... The big difference between this and regular XPathCallBacks is the fact that this passes in the XML directly and not a Net::XMPP based object. RemoveDirectXPathCallBacks(xpath=>function, - unregisters a callback etc...) function for each xpath specified. Process(integer) - takes the timeout period as an argument. If no timeout is listed then the function blocks until a packet is received. Otherwise it waits that number of seconds and then exits so your program can continue doing useful things. NOTE: This is important for GUIs. You need to leave time to process GUI commands even if you are waiting for packets. The following are the possible return values, and what they mean: 1 - Status ok, data received. 0 - Status ok, no data received. undef - Status not ok, stop processing. IMPORTANT: You need to check the output of every Process. If you get an undef then the connection died and you should behave accordingly. Send(object, - takes either a Net::XMPP::xxxxx object or ignoreActivity) an XML string as an argument and sends it to Send(string, the server. If you set ignoreActivty to 1, ignoreActivity) then the XML::Stream module will not record this packet as couting towards user activity. =head2 ID Functions SendWithID(object) - takes either a Net::XMPP::xxxxx object or an SendWithID(string) XML string as an argument, adds the next available ID number and sends that packet to the server. Returns the ID number assigned. SendAndReceiveWithID(object, - uses SendWithID and WaitForID to timeout) provide a complete way to send and SendAndReceiveWithID(string, receive packets with IDs. Can take timeout) either a Net::XMPP::xxxxx object or an XML string. Returns the proper Net::XMPP::xxxxx object based on the type of packet received. The timeout is passed on to WaitForID, see that function for how the timeout works. ReceivedID(integer) - returns 1 if a packet has been received with specified ID, 0 otherwise. GetID(integer) - returns the proper Net::XMPP::xxxxx object based on the type of packet received with the specified ID. If the ID has been received the GetID returns 0. WaitForID(integer, - blocks until a packet with the ID is received. timeout) Returns the proper Net::XMPP::xxxxx object based on the type of packet received. If the timeout limit is reached then if the packet does come in, it will be discarded. NOTE: Only <iq/> officially support ids, so sending a <message/>, or <presence/> with an id is a risk. The server will ignore the id tag and pass it through, so both clients must support the id tag for these functions to be useful.

Namespace Functions
AddNamespace(ns=>string, - This function is very complex. tag=>string, It is a little too complex to xpath=>hash) discuss within the confines of this small paragraph. Please refer to the man page for Net::XMPP::Namespaces for the full documentation on this subject.

Message Functions
MessageSend(hash) - takes the hash and passes it to SetMessage in Net::XMPP::Message (refer there for valid settings). Then it sends the message to the server.

Presence Functions
PresenceSend() - no arguments will send an empty PresenceSend(hash, Presence to the server to tell it signature=>string) that you are available. If you provide a hash, then it will pass that hash to the SetPresence() function as defined in the Net::XMPP::Presence module. Optionally, you can specify a signature and a jabber:x:signed will be placed in the <presence/>.

Subscription Functions
Subscription(hash) - taks the hash and passes it to SetPresence in Net::XMPP::Presence (refer there for valid settings). Then it sends the subscription to server. The valid types of subscription are: subscribe - subscribe to JID's presence unsubscribe - unsubscribe from JID's presence subscribed - response to a subscribe unsubscribed - response to an unsubscribe

Presence DB Functions
PresenceDB() - Tell the object to initialize the callbacks to automatically populate the Presence DB. PresenceDBParse(Net::XMPP::Presence) - for every presence that you receive pass the Presence object to the DB so that it can track the resources and priorities for you. Returns either the presence passed in, if it not able to parsed for the DB, or the current presence as found by the PresenceDBQuery function. PresenceDBDelete(string|Net::XMPP::JID) - delete thes JID entry from the DB. PresenceDBClear() - delete all entries in the database. PresenceDBQuery(string|Net::XMPP::JID) - returns the NX::Presence that was last received for the highest priority of this JID. You can pass it a string or a NX::JID object. PresenceDBResources(string|Net::XMPP::JID) - returns an array of resources in order from highest priority to lowest.

IQ Functions

Auth Functions
AuthSend(username=>string, - takes all of the information and password=>string, builds a Net::XMPP::IQ::Auth packet. resource=>string) It then sends that packet to the server with an ID and waits for that ID to return. Then it looks in resulting packet and determines if authentication was successful for not. The array returned from AuthSend looks like this: [ type , message ] If type is "ok" then authentication was successful, otherwise message contains a little more detail about the error.

IQ::Register Functions
RegisterRequest(to=>string, - send an <iq/> request to the specified timeout=>int) server/transport, if not specified it RegisterRequest() sends to the current active server. The function returns a hash that contains the required fields. Here is an example of the hash: $hash{fields} - The raw fields from the iq:register. To be used if there is no x:data in the packet. $hash{instructions} - How to fill out the form. $hash{form} - The new dynamic forms. In $hash{form}, the fields that are present are the required fields the server needs. RegisterSend(hash) - takes the contents of the hash and passes it to the SetRegister function in the module Net::XMPP::Query jabber:iq:register namespace. This function returns an array that looks like this: [ type , message ] If type is "ok" then registration was successful, otherwise message contains a little more detail about the error.

Roster Functions
Roster() - returns a Net::XMPP::Roster object. This will automatically intercept all of the roster and presence packets sent from the server and give you an accurate Roster. For more information please read the man page for Net::XMPP::Roster. RosterParse(IQ object) - returns a hash that contains the roster parsed into the following data structure: $roster{'bob@jabber.org'}->{name} - Name you stored in the roster $roster{'bob@jabber.org'}->{subscription} - Subscription status (to, from, both, none) $roster{'bob@jabber.org'}->{ask} - The ask status from this user (subscribe, unsubscribe) $roster{'bob@jabber.org'}->{groups} - Array of groups that bob@jabber.org is in RosterGet() - sends an empty Net::XMPP::IQ::Roster tag to the server so the server will send the Roster to the client. Returns the above hash from RosterParse. RosterRequest() - sends an empty Net::XMPP::IQ::Roster tag to the server so the server will send the Roster to the client. RosterAdd(hash) - sends a packet asking that the jid be added to the roster. The hash format is defined in the SetItem function in the Net::XMPP::Query jabber:iq:roster namespace. RosterRemove(hash) - sends a packet asking that the jid be removed from the roster. The hash format is defined in the SetItem function in the Net::XMPP::Query jabber:iq:roster namespace.

Roster DB Functions
RosterDB() - Tell the object to initialize the callbacks to automatically populate the Roster DB. If you do this, then make sure that you call RosterRequest() instead of RosterGet() so that the callbacks can catch it and parse it. RosterDBParse(IQ object) - If you want to manually control the database, then you can pass in all iq packets with jabber:iq:roster queries to this function. RosterDBAdd(jid,hash) - Add a new JID into the roster DB. The JID is either a string, or a Net::XMPP::JID object. The hash must be the same format as the has returned by RosterParse above, and is the actual hash, not a reference. RosterDBRemove(jid) - Remove a JID from the roster DB. The JID is either a string, or a Net::XMPP::JID object. RosterDBClear() - Remove all JIDs from the roster DB. RosterDBExists(jid) - return 1 if the JID exists in the roster DB, undef otherwise. The JID is either a string, or a Net::XMPP::JID object. RosterDBJIDs() - returns a list of Net::XMPP::JID objects that represents all of the JIDs in the DB. RosterDBGroups() - returns the complete list of roster groups in the roster. RosterDBGroupExists(group) - return 1 if the group is a group in the roster DB, undef otherwise. RosterDBGroupJIDs(group) - returns a list of Net::XMPP::JID objects that represents all of the JIDs in the specified roster group. RosterDBNonGroupJIDs() - returns a list of Net::XMPP::JID objects that represents all of the JIDs not in a roster group. RosterDBQuery(jid) - returns a hash containing the data from the roster DB for the specified JID. The JID is either a string, or a Net::XMPP::JID object. The hash format the same as in RosterParse above. RosterDBQuery(jid,key) - returns the entry from the above hash for the given key. The available keys are: name, ask, subsrcription and groups The JID is either a string, or a Net::XMPP::JID object. Ryan Eatmon This module is free software, you can redistribute it and/or modify it under the LGPL.