XMPP Class

Properties   Methods   Events   Config Settings   Errors  

The XMPP Class is used to create a lightweight messaging client using the XMPP (Jabber) protocol.

Syntax

ipworksiot.Xmpp

Remarks

The XMPP class supports both plaintext and SSL/TLS connections. When connecting over SSL/TLS the SSLServerAuthentication event allows you to check the server identity and other security attributes. The SSLStatus event provides information about the SSL handshake. Additional SSL related settings are also supported via the Config method.

A call to the ConnectTo method will perform the entire logon process after which a Connected event will fire indicating connection status. For simplicity, the entire interface is synchronous; the class will not return until a call is completed.

After a successful connection, the class will automatically begin the process of receiving the user's buddy list. The class will parse the XML as it comes in from the server and will set the appropriate properties. Once the entire buddy list has been retrieved, a Sync event will fire.

Sending a message is as simple as calling a single method. One call to the SendMessage method will cause the class to connect if it has not already done so, send the specified message to a specified user, and return to the original connection state.

The XMPP Class interface supports messaging, list and presence management. Other features of the XMPP protocol are supported through the SendCommand method and PITrail event.

Example (Connecting and Sending a Message)

IMControl.ConnectTo("myusername", "mypassword") IMControl.MessageText = "My Message" IMControl.SendMessage("ToUser") Example (Sending a Single Message)

IMControl.User = "myusername" IMControl.Password = "mypassword" IMControl.MessageText = "My Message" IMControl.SendMessage("ToUser")

Property List

The following is the full list of the properties of the class with short descriptions. Click on the links for further details.

Method List

The following is the full list of the methods of the class with short descriptions. Click on the links for further details.

Event List

The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.

Config Settings

The following is a list of config settings for the class with short descriptions. Click on the links for further details.

AuthDomain Property (XMPP Class)

The domain under which the user will be authenticated.

Syntax

public String getAuthDomain();


public void setAuthDomain(String authDomain);

Default Value

""

Remarks

Set this value if the user must authenticate via a third party authentication service that requires a different domain than the XMPP user's registered domain.

AuthMethods Property (XMPP Class)

Controls how the class authenticates itself with the XMPP server.

Syntax

public String getAuthMethods();


public void setAuthMethods(String authMethods);

Default Value

"*"

Remarks

AuthMethods is a comma-separated list of authentication methods to be enabled on the class, listed in order of preference. When authenticating, the class will pick the first method in the list that is supported by the server.

The special value * (default) may be supplied to cause the class to enable all supported authentication methods in order of presumed security. The XMPP class currently supports the following values for AuthMethods, listed in order of most secure to least secure:

• SASL/DIGEST-MD5
• AuthIQ/Digest
• SASL/CRAM-MD5
• SASL/PLAIN
• AuthIQ/Plaintext
• SASL/NTLM

Buddies Property (XMPP Class)

Collection of buddies in the buddy list.

Syntax

public XMPPBuddyList getBuddies();

Remarks

After a Sync event is fired, this property will contain a collection of all buddies in the buddy list. The buddy list will be updated by the server when a successful call to RetrieveRoster has been made.

This collection is indexed from 0 to size -1.

This property is read-only.

Connected Property (XMPP Class)

This indicates the class's login status.

Syntax

public boolean isConnected();


public void setConnected(boolean connected);

Default Value

False

Remarks

This value shows whether or not the class has successfully logged into the IMServer. It will not be true until a successful Connected event has fired.

Note: It is recommended to use the Connect or Disconnect method instead of setting this property.

This property is not available at design time.

Firewall Property (XMPP Class)

A set of properties related to firewall access.

Syntax

public Firewall getFirewall();


public void setFirewall(Firewall firewall);

Remarks

This is a Firewall-type property, which contains fields describing the firewall through which the class will attempt to connect.

IMPort Property (XMPP Class)

The server port for XMPP (default 5222).

Syntax

public int getIMPort();


public void setIMPort(int IMPort);

Default Value

5222

Remarks

For implicit SSL, use port 5223 (please refer to the SSLStartMode property for more information).

A valid port number (a value between 1 and 65535) is required for the connection to take place. The property must be set before a connection is attempted and cannot be changed once a connection is established. Any attempt to change this property while connected will fail with an error.

IMServer Property (XMPP Class)

This is the instant messaging server.

Syntax

public String getIMServer();


public void setIMServer(String IMServer);

Default Value

""

Remarks

This is the instant messaging server to which the class will connect when the Connect method is called. The IMServer property must contain a valid XMPP (Jabber) server, or any subsequent calls to the Connect method will fail.

LocalDirectory Property (XMPP Class)

The directory to which received files are saved.

Syntax

public String getLocalDirectory();


public void setLocalDirectory(String localDirectory);

Default Value

""

Remarks

This setting specifies the directory on disk to which received files will be saved. If this property is not set and a file is received the file data will be available through the Transfer event parameters. This property may also be set when the StartTransfer event fires.

LocalFile Property (XMPP Class)

The path to the file that will be sent.

Syntax

public String getLocalFile();


public void setLocalFile(String localFile);

Default Value

""

Remarks

This property specifies the local file that will be sent when calling SendFile. This property must be set before calling SendFile.

LocalHost Property (XMPP Class)

The name of the local host or user-assigned IP interface through which connections are initiated or accepted.

Syntax

public String getLocalHost();


public void setLocalHost(String localHost);

Default Value

""

Remarks

The LocalHost property contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.

In multi-homed hosts (machines with more than one IP interface) setting LocalHost to the value of an interface will make the class initiate connections (or accept in the case of server classs) only through that interface.

If the class is connected, the LocalHost property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multi-homed hosts (machines with more than one IP interface).

NOTE: LocalHost is not persistent. You must always set it in code, and never in the property window.

MessageHTML Property (XMPP Class)

This is the HTML version of the current message.

Syntax

public String getMessageHTML();


public void setMessageHTML(String messageHTML);

Default Value

""

Remarks

If the user wishes to send any HTML as a part of the message, it must be set in the MessageHTML property. The HTML must be an entire HTML document, including the <html> and <body> tags. If the HTML has unbalanced tags, the XMPP class will fail with an error.

This property is not available at design time.

MessageOtherData Property (XMPP Class)

This property contains extra data elements for the current message.

Syntax

public String getMessageOtherData();


public void setMessageOtherData(String messageOtherData);

Default Value

""

Remarks

MessageOtherData will contain zero or more complete XML elements associated with the message, but which are not defined in the Jabber specification.

MessageSubject Property (XMPP Class)

This is the subject of the current message.

Syntax

public String getMessageSubject();


public void setMessageSubject(String messageSubject);

Default Value

""

Remarks

MessageSubject will contain any subject associated with the message. Most Jabber clients will ignore the subject unless the message is of type "headline".

This property is not available at design time.

MessageText Property (XMPP Class)

This is the plain text of the current message.

Syntax

public String getMessageText();


public void setMessageText(String messageText);

Default Value

""

Remarks

MessageText is the plain text version of the current message, taken from the message's "body" child element. The text in this property is automatically escaped to ensure valid XML parsing on the other end.

This property is not available at design time.

MessageThread Property (XMPP Class)

This is the thread name of the current message.

Syntax

public String getMessageThread();


public void setMessageThread(String messageThread);

Default Value

""

Remarks

MessageThread will contain the name of the thread associated with the message. Threads are useful for tracking messages of type "chat" or "groupchat".

This property is not available at design time.

MessageType Property (XMPP Class)

This is the type of the current message.

Syntax

public int getMessageType();


public void setMessageType(int messageType);


Enumerated values:
  public final static int jmtNormal = 0;
  public final static int jmtChat = 1;
  public final static int jmtGroupChat = 2;
  public final static int jmtHeadline = 3;
  public final static int jmtError = 4;

Default Value

0

Remarks

MessageType is the type of the message as specified in the XMPP RFC. The possible values are defined in the protocol specification as follows:

This property is not available at design time.

Password Property (XMPP Class)

This is the user's password.

Syntax

public String getPassword();


public void setPassword(String password);

Default Value

""

Remarks

This must be set before a connection is attempted. If a call to the Connect method is made specifying a password, the Password property will contain that password.

Presence Property (XMPP Class)

This is the availability of the entity.

Syntax

public int getPresence();


public void setPresence(int presence);


Enumerated values:
  public final static int pcOffline = 0;
  public final static int pcChat = 1;
  public final static int pcAway = 2;
  public final static int pcXA = 3;
  public final static int pcDND = 4;

Default Value

1

Remarks

When the class completes the initial log in, it will send information telling other entities subscribed to this entity's presence that it is online. The application must provide different status and availability information as the user changes them.

The Presence property has one of four values representing general information about the user's status as defined in the Jabber protocol specification:

By default, the class sets the client presence to pcChat, meaning that the user is available. To change the initial status sent by the class set Presence to the desired presence before calling Connect.

Note: offline is not officially supported by the XMPP specification, however some XMPP server implementations may recognize the value. Setting the client's presence state to this value may cause the server to respond with an Error.

The Status property is a pure-text string representing the user's presence information. Its value maybe be any random string, including the empty string, "".

Whenever the value in Presence or Status are changed, the class will send that information to the server. If the application or user wishes to associate a specific status message with a new presence value, it should use the ChangePresence method. ChangePresence will update both the Presence and Status properties, and then send that information to the server.

Note: It is recommended to use the ChangePresence method instead of setting this property.

This property is not available at design time.

Resource Property (XMPP Class)

This is the resource for the current session.

Syntax

public String getResource();


public void setResource(String resource);

Default Value

"IPWorks XMPP Agent"

Remarks

Whenever an entity logs in to an XMPP (Jabber) server, it must provide account information as well as a resource. Resources allow multiple clients to log in using the same account. The server will forward all messages and PI data aimed at a specific resource to that resource. If a command or message is to be sent to a Jabber ID with no specified resource, the server will push that command or message out to all connected resources.

ServerDomain Property (XMPP Class)

The XMPP server's domain.

Syntax

public String getServerDomain();


public void setServerDomain(String serverDomain);

Default Value

""

Remarks

The domain of the XMPP server itself. Set this value if the domain of the server is different from the DNS name of the IMServer.

SSLAcceptServerCert Property (XMPP Class)

Instructs the class to unconditionally accept the server certificate that matches the supplied certificate.

Syntax

public Certificate getSSLAcceptServerCert();


public void setSSLAcceptServerCert(Certificate SSLAcceptServerCert);

Remarks

If it finds any issues with the certificate presented by the server, the class will normally terminate the connection with an error.

You may override this behavior by supplying a value for SSLAcceptServerCert. If the certificate supplied in SSLAcceptServerCert is the same as the certificate presented by the server, then the server certificate is accepted unconditionally, and the connection will continue normally.

Please note that this functionality is provided only for cases where you otherwise know that you are communicating with the right server. If used improperly, this property may create a security breach. Use it at your own risk.

SSLCert Property (XMPP Class)

The certificate to be used during SSL negotiation.

Syntax

public Certificate getSSLCert();


public void setSSLCert(Certificate SSLCert);

Remarks

The digital certificate that the class will use during SSL negotiation. Set this property to a valid certificate before starting SSL negotiation. To set a certificate, you may set the Encoded field to the encoded certificate. To select a certificate, use the store and subject fields.

SSLEnabled Property (XMPP Class)

Whether TLS/SSL is enabled.

Syntax

public boolean isSSLEnabled();


public void setSSLEnabled(boolean SSLEnabled);

Default Value

False

Remarks

This setting specifies whether TLS/SSL is enabled in the class. When False (default) the class operates in plaintext mode. When True TLS/SSL is enabled.

TLS/SSL may also be enabled by setting SSLStartMode. Setting SSLStartMode will automatically update this property value.

This property is not available at design time.

SSLProvider Property (XMPP Class)

This specifies the SSL/TLS implementation to use.

Syntax

public int getSSLProvider();


public void setSSLProvider(int SSLProvider);


Enumerated values:
  public final static int sslpAutomatic = 0;
  public final static int sslpPlatform = 1;
  public final static int sslpInternal = 2;

Default Value

0

Remarks

This property specifies the SSL/TLS implementation to use. In most cases the default value of 0 (Automatic) is recommended and should not be changed. When set to 0 (Automatic) the class will select whether to use the platform implementation or the internal implementation depending on the operating system as well as the TLS version being used.

Possible values are:

In most cases using the default value (Automatic) is recommended. The class will select a provider depending on the current platform.

When Automatic is selected the platform implementation is used by default. When TLS 1.3 is enabled via SSLEnabledProtocols the internal implementation is used.

SSLServerCert Property (XMPP Class)

The server certificate for the last established connection.

Syntax

public Certificate getSSLServerCert();

Remarks

SSLServerCert contains the server certificate for the last established connection.

SSLServerCert is reset every time a new connection is attempted.

This property is read-only.

SSLStartMode Property (XMPP Class)

Determines how the class starts the SSL negotiation.

Syntax

public int getSSLStartMode();


public void setSSLStartMode(int SSLStartMode);


Enumerated values:
  public final static int sslAutomatic = 0;
  public final static int sslImplicit = 1;
  public final static int sslExplicit = 2;
  public final static int sslNone = 3;

Default Value

3

Remarks

The SSLStartMode property may have one of the following values:

Status Property (XMPP Class)

Description of the availability of this entity.

Syntax

public String getStatus();


public void setStatus(String status);

Default Value

"Available for Chat."

Remarks

When the class completes the initial log in, it will send information telling other entities subscribed to this entity's presence that it is online. The application must provide different status and availability information as the user changes them.

The Presence property has one of four values representing general information about the user's status as defined in the Jabber protocol specification:

By default, the class sets the client presence to pcChat, meaning that the user is available. To change the initial status sent by the class set Presence to the desired presence before calling Connect.

Note: offline is not officially supported by the XMPP specification, however some XMPP server implementations may recognize the value. Setting the client's presence state to this value may cause the server to respond with an Error.

The Status property is a pure-text string representing the user's presence information. Its value maybe be any random string, including the empty string, "".

Whenever the value in Presence or Status are changed, the class will send that information to the server. If the application or user wishes to associate a specific status message with a new presence value, it should use the ChangePresence method. ChangePresence will update both the Presence and Status properties, and then send that information to the server.

Note: It is recommended to use the ChangePresence method instead of setting this property.

This property is not available at design time.

Timeout Property (XMPP Class)

A timeout for the class.

Syntax

public int getTimeout();


public void setTimeout(int timeout);

Default Value

60

Remarks

If the Timeout property is set to 0, all operations will run uninterrupted until successful completion or an error condition is encountered.

If Timeout is set to a positive value, the class will wait for the operation to complete before returning control.

The class will use DoEvents to enter an efficient wait loop during any potential waiting period, making sure that all system events are processed immediately as they arrive. This ensures that the host application does not "freeze" and remains responsive.

If Timeout expires, and the operation is not yet complete, the class throws an exception.

Please note that by default, all timeouts are inactivity timeouts, i.e. the timeout period is extended by Timeout seconds when any amount of data is successfully sent or received.

The default value for the Timeout property is 60 seconds.

User Property (XMPP Class)

The user portion of this entity's Jabber ID.

Syntax

public String getUser();


public void setUser(String user);

Default Value

""

Remarks

The User property is a unique username associated with this entity and set at time of registration under the field "user".

UserDomain Property (XMPP Class)

Gets or sets the domain value used for Jabber IDs.

Syntax

public String getUserDomain();


public void setUserDomain(String userDomain);

Default Value

""

Remarks

A Jabber ID (JID) is a unique identifier of the format "User@Domain/Resource". user@domain denotes the account by username and domain. The Resource is given during the login process to distinguish individual connections under the same account. If the IMServer contains multiple domains, this property setting allows the user to specify the domain under which to login.

If Domain is empty, the value in IMServer is used by default when creating the client's JID.

UserInfo Property (XMPP Class)

Collection of named registration fields.

Syntax

public XMPPUserInfoMap getUserInfo();


public void setUserInfo(XMPPUserInfoMap userInfo);

Remarks

Before a registration can be attempted, the application should use the QueryRegister method to poll the host to which the user wishes to register. This will gather all of the necessary fields that the user must send to the server, and will populate the UserInfo collection accordingly. After a successful query, all entries in UserInfo values will be empty strings.

The possible registration fields are defined in the Jabber protocol specification as follows:

After the user has set all of the values in UserInfo, and added any extra fields they may wish to include in their registration, the application should make a call to Register.

If the class is not already connected when this method is called, it will connect, poll the registration fields, and then disconnect.

This collection is a hashtable type of collection where the field string is used as the key to the desired XMPP user info object.

Example (Setting New User Information)

xmpp1.queryRegister("server"); xmpp1.getUserInfo().item("Username").setValue("newuser"); xmpp1.getUserInfo().item("Password").setValue("newpass"); xmpp1.register("server");

This property is not available at design time.

Add Method (Xmpp Class)

This method will add an entity to this entity's roster.

Syntax

public void add(String jabberId, String name, String groups);

Remarks

JabberId is the Jabber ID of the entity to be added. It should be of form "user@host". If no hostname is specified, the class will assume the user's account is with the server in IMServer, and will append that hostname to JabberId before sending the request.

Name will contain the name that is to be associated with JabberId in this entity's roster. It may be the empty string, "".

Groups is either the empty string ("") or a comma- separated list of groups to which JabberId is to be added. If JabberId already exists in the buddy list, it will be updated to exist only in the specified groups. A buddy's group list can also be modified by the Buddies property.

The Add method will make a subscription request to the presence of the specified JabberId. Upon receiving this request, the server will add an entry into this user's buddy list with a subscription of type subscriptionNone (0) if there was no previous entry (if this user has already allowed JabberId to subscribe to this user's presence, there will already be an entry of type subscriptionFrom (2)). If the contact chooses to allow the subscription, the server will update the entry and a BuddyUpdate event will fire with the new subscription value (subscriptionTo (1) if this is a new contact, or subscriptionBoth (3) if the contact is now mutual).

The XMPP protocol permits XMPP (Jabber) clients to communicate with foreign IM networks such as AIM, MSN, SMS, and others through the use of gateway servers that translate between the foreign protocol and XMPP. When sending or receiving presence information, messages, or subscription requests, Domain will be a gateway for the foreign network on which the contact resides and with which this user has registered an account for that foreign network. The Register method can be used to register with a foreign network gateway.

Cancel Method (Xmpp Class)

This will cancel another entity's subscription to this entity's presence.

Syntax

public void cancel(String jabberId);

Remarks

If for any reason the user should want to undo a previously granted subscription, this can be achieved through the Cancel method. The method will unsubscribe the target from this user's presence, thus preventing the target from seeing this user in the future.

ChangePassword Method (Xmpp Class)

This method will change the current user's password.

Syntax

public void changePassword(String password);

Remarks

This method changes the current user's password to the password that is specified. The class must be connected to the server when this method is called.

ChangePresence Method (Xmpp Class)

This method will set the availability and status of this entity.

Syntax

public void changePresence(int presenceCode, String status);

Remarks

PresenceCode should correspond the possible values of the Presence property:

By default, the class sets the client presence to pcChat, meaning that the user is available. To change the initial status sent by the class set Presence to the desired presence before calling Connect.

Note: offline is not officially supported by the XMPP specification, however some XMPP server implementations may recognize the value. Setting the client's presence state to this value may cause the server to respond with an Error.

Status can be any random string, including the empty string "".

Config Method (Xmpp Class)

Sets or retrieves a configuration setting.

Syntax

public String config(String configurationString);

Remarks

Config is a generic method available in every class. It is used to set and retrieve configuration settings for the class.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these internal properties is provided through the Config method.

To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

Connect Method (Xmpp Class)

This method will connect the class to the server.

Syntax

public void connect();

Remarks

The Connect method performs the entire connection routine. This includes connection to the IMServer, authenticating with the specified User and Password, and session initialization.

The Connected event will fire once for the initial TCP connection and again when the XMPP Logon is complete.

ConnectTo Method (Xmpp Class)

This method will connect the class to the server.

Syntax

public void connectTo(String user, String password);

Remarks

The ConnectTo method performs the entire connection routine. This includes connection to the IMServer, user logon and authentication, and session initialization.

The Connected event will fire once for the initial TCP connection and again when the XMPP Logon is complete.

Since ConnectTo is called with a user and password specified, the User and Password properties will updated accordingly.

Disconnect Method (Xmpp Class)

This method disconnects the class from the server.

Syntax

public void disconnect();

Remarks

The Disconnect method will send the disconnect command to the notification server. Upon disconnection, a Disconnected event will be fired.

DoEvents Method (Xmpp Class)

This method processes events from the internal message queue.

Syntax

public void doEvents();

Remarks

When DoEvents is called, the class processes any available events. If no events are available, it waits for a preset period of time, and then returns.

Interrupt Method (Xmpp Class)

Interrupt the current method.

Syntax

public void interrupt();

Remarks

If there is no method in progress, Interrupt simply returns, doing nothing.

ProbePresence Method (Xmpp Class)

Use this method to probe for another entity's presence.

Syntax

public void probePresence(String jabberId);

Remarks

In the case that the user needs to update a particular entity's presence this method can be used to retrieve it. After a successful call, the server will either respond with the last known presence for Jabber, or will send a presence element of type "error". In either case, the respond will be returned by a Presence event.

QueryRegister Method (Xmpp Class)

This method queries a server for the necessary registration fields.

Syntax

public void queryRegister(String XMPPServer);

Remarks

Before a registration can be attempted, the application should use the QueryRegister method to poll the host to which the user wishes to register. This will gather all of the necessary fields that the user must send to the server, and will populate the UserInfo collection accordingly. After a successful query, all entries in UserInfo values will be empty strings.

The possible registration fields are defined in the Jabber protocol specification as follows:

After the user has set all of the values in UserInfo, and added any extra fields they may wish to include in their registration, the application should make a call to Register.

If the class is not already connected when this method is called, it will connect, poll the registration fields, and then disconnect.

Register Method (Xmpp Class)

This method registers an account with a server.

Syntax

public void register(String XMPPServer);

Remarks

Before a registration can be attempted, the application should use the QueryRegister method to poll the host to which the user wishes to register. This will gather all of the necessary fields that the user must send to the server, and will populate the UserInfo collection accordingly. After a successful query, all entries in UserInfo values will be empty strings.

The possible registration fields are defined in the Jabber protocol specification as follows:

After the user has set all of the values in UserInfo, and added any extra fields they may wish to include in their registration, the application should make a call to Register.

If the class is not already connected when this method is called, it will connect, poll the registration fields, and then disconnect.

A new account can be registered at any time, including while the class is logged into the host under an existing account.

Remove Method (Xmpp Class)

This method will remove an entity from this entity's roster.

Syntax

public void remove(String jabberId, String name, String group);

Remarks

JabberId is the Jabber ID of the entity to be removed. It should be of form "user@host". If no hostname is specified, the class will assume the user's account is with the server in IMServer, and will append that hostname to JabberId before sending the request.

Name should contain the name that is to be associated with JabberId in this entity's roster. It may be the empty string, "".

Groups may be either the empty string ("") or a comma- separated list of groups from which JabberId is to be removed. If no group is specified, the buddy will be completely removed from the buddy list.

After calling the Remove method, the server will remove the entry from the server-side roster, and will push the result out to all connected resources. A BuddyUpdate event will fire with subscription of type subscriptionRemove, and the entry will be removed from the Jabber class's internally stored list.

Reset Method (Xmpp Class)

Reset the class.

Syntax

public void reset();

Remarks

This method will reset the class's properties to their default values.

RetrieveRoster Method (Xmpp Class)

This method will retrieve this entity's roster from the server.

Syntax

public void retrieveRoster();

Remarks

After the class connects, it will automatically send a request to the server to retrieve the roster. However, should the user or application wish to update the entire roster, this method may be used to do so.

After a successful call to the RetrieveRoster method, the server will respond with this entity's roster. The class will parse the roster and fire the Sync event once per item. This event may also fire for each entity added to or removed from the roster.

SendCommand Method (Xmpp Class)

This method sends a command to the server.

Syntax

public void sendCommand(String command);

Remarks

The SendCommand method will send the Command parameter to the server. The command must be in valid XML format, and must be recognizable to the IMServer.

The SendCommand method should only be used by programmers or users who are connecting to non-standard servers whose command list is not covered by the class. Any responses that are defined in the protocol specification will be returned by the appropriate event. Any non-standard IQ message will be returned by the IQ event. All other responses will be returned by the PITrail event.

SendFile Method (Xmpp Class)

Sends a file to the specified user.

Syntax

public void sendFile(String jabberId);

Remarks

This method sends the file specified by LocalFile to the user specified by the JabberId parameter.

JabberId is the intended recipient of the message. It is of the form user@domain/resource. If a resource is not supplied, all logged-in instances of the user's account will receive the message.

If SetSendStream is called, the stream will be used as the source when sending the file.

The class supports sending files using In-Band Bystestreams as defined in XEP-0047 and XEP-0096.

SendMessage Method (Xmpp Class)

This method will send a message to the specified user.

Syntax

public String sendMessage(String jabberId);

Remarks

JabberId is the intended recipient of the message. It is of the form user@domain/resource. If a resource is not supplied, all logged-in instances of the user's account will receive the message.

The class associates several properties with messages it receives and sends. When it receives a message, the class will parse out the corresponding values and set these properties before firing a MessageIn event. After the event returns control to the class, the properties will be cleared (ie, they will be set to the empty string, "").

Before sending a message, the application should set the appropriate properties to be associated with the message. The class will send only properties with non-empty string values (""), and will clear all properties after a successful send.

The associated properties are the following:

If the parameter passed to SendMessage is prefixed with "@" the component will interpret the value as a domain when constructing the message. This allows for sending directly to sub-domains.

Note: the XMPP class will generate and return a unique identifier for each message sent. This identifier can be used to track messages in conjunction with various Jabber Extension Protocols.

SetReceiveStream Method (Xmpp Class)

Sets the stream to which the received file data from will be written.

Syntax

public void setReceiveStream(java.io.OutputStream receiveStream);

Remarks

This method sets the stream to which the incoming file will be written. This can be set from within the StartTransfer event when a file is received.

The file data will be written to the stream. The stream should be open and normally set to position 0. The class will automatically close this stream if CloseStreamAfterTransfer is true (default). The downloaded content will be written starting at the current position in the stream.

If a download stream is set, the incoming file will not be written to LocalDirectory.

SetSendStream Method (Xmpp Class)

Sets the stream to be sent.

Syntax

public void setSendStream(java.io.InputStream sendStream, String filename);

Remarks

This method sets the stream to be sent to the recipient. Filename specifies the name of the file. If an upload stream is set before the SendFile method is called, the content of the stream will be read by the class and sent. The stream should be open and normally set to position 0.

The class will automatically close this stream if CloseStreamAfterTransfer is true (default). If the stream is closed, you will need to call SetSendStream again before calling SendFile again.

The content of the stream will be read from the current position all the way to the end.

Note: SetSendStream and LocalFile will reset the other.

SetUserInfoField Method (Xmpp Class)

This method will add a user information field for registration.

Syntax

public void setUserInfoField(String field, String value);

Remarks

This method will search through UserInfo for the field name in Field and set the corresponding value to Value. If the field was not previously contained in UserInfo, it will automatically added.

Before a registration can be attempted, the application should use the QueryRegister method to poll the host to which the user wishes to register. This will gather all of the necessary fields that the user must send to the server, and will populate the UserInfo collection accordingly. After a successful query, all entries in UserInfo values will be empty strings.

The possible registration fields are defined in the Jabber protocol specification as follows:

After the user has set all of the values in UserInfo, and added any extra fields they may wish to include in their registration, the application should make a call to Register.

If the class is not already connected when this method is called, it will connect, poll the registration fields, and then disconnect.

SubscribeTo Method (Xmpp Class)

Use this method to subscribe to another entity's presence.

Syntax

public void subscribeTo(String jabberId);

Remarks

This method will send a request for a subscription to JabberId's presence. If the entity allows the subscription, a new item will be stored in the buddy list with the appropriate subscription type. Otherwise, no change will take place.

Unregister Method (Xmpp Class)

This method cancels an account with the host.

Syntax

public void unregister();

Remarks

If the user or application wishes to terminate an account with the IMServer it should make a call to this method. After a successful call, the account will be canceled and the class will be logged off the server, but not disconnected.

UnsubscribeTo Method (Xmpp Class)

This method will cancel a subscription to another entity's presence.

Syntax

public void unsubscribeTo(String jabberId);

Remarks

This method will inform the server of the cancellation of subscription to JabberId's presence. After a successful call the subscription type of the associated buddy list item will be updated.

UpdateBuddyGroup Method (Xmpp Class)

Updates the buddy's associatd groups.

Syntax

public void updateBuddyGroup(int buddyIndex, String group);

Remarks

This method updates the associated groups for the buddy specified by BuddyIndex.

After the Sync event has fired the Group field is populated with a comma-separated list of groups for each buddy. To update the groups for a buddy call this method with the buddy's index and the comma-separate list of groups the buddy should be associated with. Setting Group to empty string ("") will cause the buddy to be completely disassociated from all groups.

BuddyUpdate Event (Xmpp Class)

This event is fired whenever a roster entry is updated.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void buddyUpdate(XmppBuddyUpdateEvent e) {}
  ...
}

public class XmppBuddyUpdateEvent {
  public int buddyIdx;
}

Remarks

The BuddyUpdate event will fire whenever a new buddy list entry is added or an old entry is updated. The updated information can be retrieved through the Buddies collection property. The BuddyIdx parameter of this event will be the index of that XMPPBuddy in the collection.

Connected Event (Xmpp Class)

This event is fired when a connection to the IM Server is completed.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void connected(XmppConnectedEvent e) {}
  ...
}

public class XmppConnectedEvent {
  public int statusCode;
  public String description;
}

Remarks

If the connection is made normally, StatusCode is 0, and Description is "OK".

If the connection fails, StatusCode has the error code returned by the TCP/IP stack. Description contains a description of this code. The value of StatusCode is equal to the value of the error.

Please refer to the Error Codes section for more information.

ConnectionStatus Event (Xmpp Class)

This event is fired to indicate changes in the connection state.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void connectionStatus(XmppConnectionStatusEvent e) {}
  ...
}

public class XmppConnectionStatusEvent {
  public String connectionEvent;
  public int statusCode;
  public String description;
}

Remarks

The ConnectionStatus event is fired when the connection state changes: for example, completion of a firewall or proxy connection or completion of a security handshake.

The ConnectionEvent parameter indicates the type of connection event. Values may include the following:

Disconnected Event (Xmpp Class)

This event is fired when the chat service connection is lost.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void disconnected(XmppDisconnectedEvent e) {}
  ...
}

public class XmppDisconnectedEvent {
  public int statusCode;
  public String description;
}

Remarks

If the connection is broken normally, StatusCode is 0, and Description is "OK".

If the connection is broken for any other reason, StatusCode has the error code returned by the TCP/IP subsystem. Description contains a description of this code. The value of StatusCode is equal to the value of the TCP/IP error.

Please refer to the Error Codes section for more information.

EndTransfer Event (Xmpp Class)

Fired when a file transfer completes.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void endTransfer(XmppEndTransferEvent e) {}
  ...
}

public class XmppEndTransferEvent {
  public int direction;
  public String fileId;
  public String filename;
  public boolean success;
}

Remarks

When a file transfer completes this event will fire.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

Error Event (Xmpp Class)

This event is fired when the server sends a protocol error message.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void error(XmppErrorEvent e) {}
  ...
}

public class XmppErrorEvent {
  public int errorCode;
  public String description;
}

Remarks

This is fired whenever there is a protocol error. ErrorCode will contain the error code string sent by the server. Description will contain the Xmpp class's interpretation of the code.

IQ Event (Xmpp Class)

This event is fired for IQ messages not normally supported by the class.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void IQ(XmppIQEvent e) {}
  ...
}

public class XmppIQEvent {
  public String iq;
  public String id;
  public String from;
  public String iqType;
  public boolean ignore;
}

Remarks

Some servers may wish to gather some data from the client in ways not specified by the XMPP RFC. This event will contain any IQ message that is not a part of the Jabber specification. The Iq parameter will contain an entire XML entity, and thus will require both knowledge of XML and knowledge of the possible contents of the IQ message to parse. Id will contain the transaction id of the IQ message. From will contain the sender's Jabber ID. IqType will have one of the following values:

Note: to respond to these IQs, you may use the SendCommand method.

MessageIn Event (Xmpp Class)

This event is fired upon receipt of a message.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void messageIn(XmppMessageInEvent e) {}
  ...
}

public class XmppMessageInEvent {
  public String messageId;
  public String from;
  public String domain;
  public String resource;
  public int messageType;
  public String subject;
  public String messageThread;
  public String messageText;
  public String messageHTML;
  public String other;
}

Remarks

When a message is received, the XMPP class will parse the sender's Jabber ID into the From, Domain, and Resource fields. These parameters can be used to track the exact instance of a user's account that originated the message.

MessageId can be used with Jabber extension protocols. The MessageText parameter is the plaintext portion of the message body. MessageHTML will contain any HTML from the message.

Type the type of message received. See MessageType for a list of possible values. For message of type "headline", Subject will reflect the subject of the message. For messages of type "chat", Thread will report the conversation thread for which the current message is a follow-up.

Other will contains any extra data associated with the message but not defined by the XMPP-IM protocol.

PITrail Event (Xmpp Class)

This event is fired for all protocol messages.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void PITrail(XmppPITrailEvent e) {}
  ...
}

public class XmppPITrailEvent {
  public int direction;
  public String pi;
}

Remarks

The PITrail event is useful for debugging purposes. It shows all the interaction between the client and the server, line by line.

SessionId will hold the session number that originated the PI. A value of 0 is reserved for all PI dealing with the IMServer.

The direction parameter shows the originator of the message:

The Pi parameter contains the PI message.

Presence Event (Xmpp Class)

This event is fired when the presence of a subscribed entity changes.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void presence(XmppPresenceEvent e) {}
  ...
}

public class XmppPresenceEvent {
  public String user;
  public String domain;
  public String resource;
  public int availability;
  public String status;
}

Remarks

This event contains the availability and status information of a particular Jabber entity to whom this entity has a subscription.

Because a user can log in multiple times using the same account, the XMPP class will parse the user's Jabber ID into the User, Domain and Resource parameters so that the client can easily track which instance of the account sent the presence.

The XMPP protocol permits XMPP (Jabber) clients to communicate with foreign IM networks such as AIM, MSN, SMS, and others through the use of gateway servers that translate between the foreign protocol and XMPP. When sending or receiving presence information, messages, or subscription requests, Domain will be a gateway for the foreign network on which the contact resides and with which this user has registered an account for that foreign network. The Register method can be used to register with a foreign network gateway.

Availability corresponds to the Presence property of the class, with the same possible values:

By default, the class sets the client presence to pcChat, meaning that the user is available. To change the initial status sent by the class set Presence to the desired presence before calling Connect.

Note: offline is not officially supported by the XMPP specification, however some XMPP server implementations may recognize the value. Setting the client's presence state to this value may cause the server to respond with an Error.

Status corresponds to the Status property. This value may be any random string, including the empty string, "".

ReadyToSend Event (Xmpp Class)

This event is fired when the class is ready to send data.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void readyToSend(XmppReadyToSendEvent e) {}
  ...
}

public class XmppReadyToSendEvent {
}

Remarks

The ReadyToSend event indicates that the underlying Transmission Control Protocol (TCP)/IP subsystem is ready to accept data after a failed DataToSend. This event also is fired immediately after a connection to the remote host is established.

SSLServerAuthentication Event (Xmpp Class)

Fired after the server presents its certificate to the client.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void SSLServerAuthentication(XmppSSLServerAuthenticationEvent e) {}
  ...
}

public class XmppSSLServerAuthenticationEvent {
  public byte[] certEncoded;
  public String certSubject;
  public String certIssuer;
  public String status;
  public boolean accept;
}

Remarks

During this event, the client can decide whether or not to continue with the connection process. The Accept parameter is a recommendation on whether to continue or close the connection. This is just a suggestion: application software must use its own logic to determine whether or not to continue.

When Accept is False, Status shows why the verification failed (otherwise, Status contains the string OK). If it is decided to continue, you can override and accept the certificate by setting the Accept parameter to True.

SSLStatus Event (Xmpp Class)

Shows the progress of the secure connection.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void SSLStatus(XmppSSLStatusEvent e) {}
  ...
}

public class XmppSSLStatusEvent {
  public String message;
}

Remarks

The event is fired for informational and logging purposes only. This event tracks the progress of the connection.

StartTransfer Event (Xmpp Class)

Fired when a file transfer begins.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void startTransfer(XmppStartTransferEvent e) {}
  ...
}

public class XmppStartTransferEvent {
  public int direction;
  public String fileId;
  public String user;
  public String domain;
  public String resource;
  public String filename;
  public String datetime;
  public long size;
  public boolean accept;
}

Remarks

When a file is received, the XMPP component will parse the sender's Jabber ID into the User, Domain, and Resource fields. The FileId and Filename parameters identify the current transfer. Within this event you may override the Filename by setting the Filename parameter. At this time you may also set LocalDirectory if it is not already set or call SetReceiveStream.

When a sending a file, the XMPP component will parse the receiver's Jabber ID into the User, Domain, and Resource fields.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

SubscriptionRequest Event (Xmpp Class)

This event fires when a subscription request is received.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void subscriptionRequest(XmppSubscriptionRequestEvent e) {}
  ...
}

public class XmppSubscriptionRequestEvent {
  public String from;
  public String domain;
  public boolean accept;
}

Remarks

This event fires whenever another XMPP entity requests a subscription to this entity's presence. The XMPP class will parse the requesting entity's Jabber ID into the From and Domain parameters. There is no need to know which resource sent the request, since all instances of the requesting entity's account have access to the same roster.

Accept will initially be false, but setting it to true will cause the XMPP class to allow the remote subscription. Otherwise, the XMPP class will actively deny the subscription request.

Sync Event (Xmpp Class)

This event fires upon a complete information synchronization with the server.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void sync(XmppSyncEvent e) {}
  ...
}

public class XmppSyncEvent {
}

Remarks

The Sync event will fire after each successful call to the RetrieveRoster method. When the event fires, the buddy list, or roster, will be completely retrieved and the Buddies collection will be filled out accordingly:

Please refer to Buddies collection property for more information.

Transfer Event (Xmpp Class)

Fired during file transfer.

Syntax

public class DefaultXmppEventListener implements XmppEventListener {
  ...
  public void transfer(XmppTransferEvent e) {}
  ...
}

public class XmppTransferEvent {
  public int direction;
  public String fileId;
  public String filename;
  public long bytesTransferred;
  public int percentDone;
  public byte[] text;
  public boolean cancel;
}

Remarks

This event will fire when sending or receiving. One or more Transfer events are fired during file transfer.

The BytesTransferred parameter shows the number of bytes transferred since the beginning of the transfer.

Text contains the portion of the file data being delivered.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

The PercentDone parameter shows the progress of the transfer in the corresponding direction. If PercentDone can not be calculated the value will be -1.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

The PercentDone parameter shows the progress of the transfer in the corresponding direction. If PercentDone can not be calculated the value will be -1.

Note: Events are not re-entrant. Performing time-consuming operations within this event will prevent it from firing again in a timely manner and may affect overall performance.

Certificate Type

This is the digital certificate being used.

Remarks

This type describes the current digital certificate. The certificate may be a public or private key. The fields are used to identify or select certificates.

Fields

Constructors

public Certificate();

Creates a Certificate instance whose properties can be set. This is useful for use with CERTMGR when generating new certificates.

public Certificate( certificateFile);

Opens CertificateFile and reads out the contents as an X509 public key.

public Certificate( certificateData);

Parses CertificateData as an X509 public key.

public Certificate( certStoreType,  store,  storePassword,  subject);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  store,  storePassword,  subject,  configurationString);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store. ConfigurationString is a newline separated list of name-value pairs that may be used to modify the default behavior. Possible values include "PersistPFXKey", which shows whether or not the PFX key is persisted after performing operations with the private key. This correlates to the PKCS12_NO_PERSIST_KEY CyrptoAPI option. The default value is True (the key is persisted). "Thumbprint" - a MD5, SHA1, or SHA256 thumbprint of the certificate to load. When specified, this value is used to select the certificate in the store. This is applicable to cstUser, cstMachine, cstPublicKeyFile, and cstPFXFile store types. "UseInternalSecurityAPI" shows whether the platform (default) or the internal security API is used when performing certificate-related operations. After the store has been successfully opened, the class will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  store,  storePassword,  encoded);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will load Encoded as an X509 certificate and search the opened store for a corresponding private key.

public Certificate( certStoreType,  storeBlob,  storePassword,  subject);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. StoreBlob is a string (binary- or base64-encoded) containing the certificate data. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  storeBlob,  storePassword,  subject,  configurationString);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. StoreBlob is a string (binary- or base64-encoded) containing the certificate data. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  storeBlob,  storePassword,  encoded);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a string (binary- or base64-encoded) containing the certificate store. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will load Encoded as an X509 certificate and search the opened store for a corresponding private key.

Firewall Type

This is the firewall the class will connect through.

Remarks

When connecting through a firewall, this type is used to specify different properties of the firewall, such as the firewall Host and the FirewallType.

Fields

Constructors

public Firewall();

XMPPBuddy Type

A buddy in the XMPP buddy list.

Remarks

This type describes a buddy in the user's buddy list. Each buddy in the list has certain properties associated with it, such as names, id, etc.

Fields

Constructors

public XMPPBuddy();

XMPPUserInfo Type

A named registration field.

Remarks

This type describes the user information that must be sent to the server during registration.

Fields

Constructors

public XMPPUserInfo();

public XMPPUserInfo( field,  value);

Config Settings (Xmpp Class)

XMPP Config Settings

TCPClient Config Settings

SSL Config Settings

-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
..
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----

-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
..
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----

Socket Config Settings

Base Config Settings

Trappable Errors (Xmpp Class)

XMPP Errors

TCPClient Errors

SSL Errors

TCP/IP Errors