java - 使用 asmack for android 在 XMPP 数据包中的消息标记中添加自定义属性？-6ren

java - 使用 asmack for android 在 XMPP 数据包中的消息标记中添加自定义属性？

转载作者：太空宇宙更新时间：2023-11-03 11:59:49

我要接收的消息包。

  <message to="39@domainname.com/smack" chat_id="73392" 
           custom_packet="true" user_id="44" manager_id="39" time_stamp="0" website_id="0" 
           visitor_name="John" end_time="False" xml:lang="en-us" type="groupchat" 
           from="room73392@conference.domainname.com/39">
           <body>Hello</body> 
           <x xmlns="http://jabber.org/protocol/muc#user"> 
           <status xmlns="" code="0"/>   
           </x></message>

我收到的消息包。

<message to="44@domainname.com/Smack" 
    from="room73407@conference.domainname.com/Visitor1171" type="groupchat">
    <body>Hello</body>
    <delay xmlns="urn:xmpp:delay"></delay>
    <x xmlns="jabber:x:delay" stamp="20120917T05:57:19" 
    from="4732abb5@domainname.com/4732abb5">
    </x></message>

我有一个 smack 的源代码，这是数据包类。谁能帮我制作我的定制包。任何帮助修改源代码表示赞赏。

代码:

public abstract class Packet {

protected static final String DEFAULT_LANGUAGE =
        java.util.Locale.getDefault().getLanguage().toLowerCase();

private static String DEFAULT_XML_NS = null;

/**
 * Constant used as packetID to indicate that a packet has no id. To indicate that a packet
 * has no id set this constant as the packet's id. When the packet is asked for its id the
 * answer will be <tt>null</tt>.
 */
public static final String ID_NOT_AVAILABLE = "ID_NOT_AVAILABLE";

/**
 * Date format as defined in XEP-0082 - XMPP Date and Time Profiles.
 * The time zone is set to UTC.
 * <p>
 * Date formats are not synchronized. Since multiple threads access the format concurrently,
 * it must be synchronized externally. 
 */
public static final DateFormat XEP_0082_UTC_FORMAT = new SimpleDateFormat(
                "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
static {
    XEP_0082_UTC_FORMAT.setTimeZone(TimeZone.getTimeZone("UTC"));
}


/**
 * A prefix helps to make sure that ID's are unique across mutliple instances.
 */
private static String prefix = StringUtils.randomString(5) + "-";

/**
 * Keeps track of the current increment, which is appended to the prefix to
 * forum a unique ID.
 */
private static long id = 0;

private String xmlns = DEFAULT_XML_NS;

/**
 * Returns the next unique id. Each id made up of a short alphanumeric
 * prefix along with a unique numeric value.
 *
 * @return the next id.
 */
public static synchronized String nextID() {
    return prefix + Long.toString(id++);
}

public static void setDefaultXmlns(String defaultXmlns) {
    DEFAULT_XML_NS = defaultXmlns;
}

private String packetID = null;
private String to = null;
private String from = null;
private final List<PacketExtension> packetExtensions
        = new CopyOnWriteArrayList<PacketExtension>();

private final Map<String,Object> properties = new HashMap<String, Object>();
private XMPPError error = null;

/**
 * Returns the unique ID of the packet. The returned value could be <tt>null</tt> when
 * ID_NOT_AVAILABLE was set as the packet's id.
 *
 * @return the packet's unique ID or <tt>null</tt> if the packet's id is not available.
 */
public String getPacketID() {
    if (ID_NOT_AVAILABLE.equals(packetID)) {
        return null;
    }

    if (packetID == null) {
        packetID = nextID();
    }
    return packetID;
}

/**
 * Sets the unique ID of the packet. To indicate that a packet has no id
 * pass the constant ID_NOT_AVAILABLE as the packet's id value.
 *
 * @param packetID the unique ID for the packet.
 */
public void setPacketID(String packetID) {
    this.packetID = packetID;
}

/**
 * Returns who the packet is being sent "to", or <tt>null</tt> if
 * the value is not set. The XMPP protocol often makes the "to"
 * attribute optional, so it does not always need to be set.<p>
 *
 * The StringUtils class provides several useful methods for dealing with
 * XMPP addresses such as parsing the
 * {@link StringUtils#parseBareAddress(String) bare address},
 * {@link StringUtils#parseName(String) user name},
 * {@link StringUtils#parseServer(String) server}, and
 * {@link StringUtils#parseResource(String) resource}.  
 *
 * @return who the packet is being sent to, or <tt>null</tt> if the
 *      value has not been set.
 */
public String getTo() {
    return to;
}

/**
 * Sets who the packet is being sent "to". The XMPP protocol often makes
 * the "to" attribute optional, so it does not always need to be set.
 *
 * @param to who the packet is being sent to.
 */
public void setTo(String to) {
    this.to = to;
}

/**
 * Returns who the packet is being sent "from" or <tt>null</tt> if
 * the value is not set. The XMPP protocol often makes the "from"
 * attribute optional, so it does not always need to be set.<p>
 *
 * The StringUtils class provides several useful methods for dealing with
 * XMPP addresses such as parsing the
 * {@link StringUtils#parseBareAddress(String) bare address},
 * {@link StringUtils#parseName(String) user name},
 * {@link StringUtils#parseServer(String) server}, and
 * {@link StringUtils#parseResource(String) resource}.  
 *
 * @return who the packet is being sent from, or <tt>null</tt> if the
 *      value has not been set.
 */
public String getFrom() {
    return from;
}

/**
 * Sets who the packet is being sent "from". The XMPP protocol often
 * makes the "from" attribute optional, so it does not always need to
 * be set.
 *
 * @param from who the packet is being sent to.
 */
public void setFrom(String from) {
    this.from = from;
}

/**
 * Returns the error associated with this packet, or <tt>null</tt> if there are
 * no errors.
 *
 * @return the error sub-packet or <tt>null</tt> if there isn't an error.
 */
public XMPPError getError() {
    return error;
}

/**
 * Sets the error for this packet.
 *
 * @param error the error to associate with this packet.
 */
public void setError(XMPPError error) {
    this.error = error;
}

/**
 * Returns an unmodifiable collection of the packet extensions attached to the packet.
 *
 * @return the packet extensions.
 */
public synchronized Collection<PacketExtension> getExtensions() {
    if (packetExtensions == null) {
        return Collections.emptyList();
    }
    return Collections.unmodifiableList(new ArrayList<PacketExtension>(packetExtensions));
}

/**
 * Returns the first extension of this packet that has the given namespace.
 *
 * @param namespace the namespace of the extension that is desired.
 * @return the packet extension with the given namespace.
 */
public PacketExtension getExtension(String namespace) {
    return getExtension(null, namespace);
}

/**
 * Returns the first packet extension that matches the specified element name and
 * namespace, or <tt>null</tt> if it doesn't exist. If the provided elementName is null
 * than only the provided namespace is attempted to be matched. Packet extensions are
 * are arbitrary XML sub-documents in standard XMPP packets. By default, a 
 * DefaultPacketExtension instance will be returned for each extension. However, 
 * PacketExtensionProvider instances can be registered with the 
 * {@link org.jivesoftware.smack.provider.ProviderManager ProviderManager}
 * class to handle custom parsing. In that case, the type of the Object
 * will be determined by the provider.
 *
 * @param elementName the XML element name of the packet extension. (May be null)
 * @param namespace the XML element namespace of the packet extension.
 * @return the extension, or <tt>null</tt> if it doesn't exist.
 */
public PacketExtension getExtension(String elementName, String namespace) {
    if (namespace == null) {
        return null;
    }
    for (PacketExtension ext : packetExtensions) {
        if ((elementName == null || elementName.equals(ext.getElementName()))
                && namespace.equals(ext.getNamespace()))
        {
            return ext;
        }
    }
    return null;
}

/**
 * Adds a packet extension to the packet.
 *
 * @param extension a packet extension.
 */
public void addExtension(PacketExtension extension) {
    packetExtensions.add(extension);
}

/**
 * Removes a packet extension from the packet.
 *
 * @param extension the packet extension to remove.
 */
public void removeExtension(PacketExtension extension)  {
    packetExtensions.remove(extension);
}

/**
 * Returns the packet property with the specified name or <tt>null</tt> if the
 * property doesn't exist. Property values that were orginally primitives will
 * be returned as their object equivalent. For example, an int property will be
 * returned as an Integer, a double as a Double, etc.
 *
 * @param name the name of the property.
 * @return the property, or <tt>null</tt> if the property doesn't exist.
 */
public synchronized Object getProperty(String name) {
    if (properties == null) {
        return null;
    }
    return properties.get(name);
}

/**
 * Sets a property with an Object as the value. The value must be Serializable
 * or an IllegalArgumentException will be thrown.
 *
 * @param name the name of the property.
 * @param value the value of the property.
 */
public synchronized void setProperty(String name, Object value) {
    if (!(value instanceof Serializable)) {
        throw new IllegalArgumentException("Value must be serialiazble");
    }
    properties.put(name, value);
}

/**
 * Deletes a property.
 *
 * @param name the name of the property to delete.
 */
public synchronized void deleteProperty(String name) {
    if (properties == null) {
        return;
    }
    properties.remove(name);
}

/**
 * Returns an unmodifiable collection of all the property names that are set.
 *
 * @return all property names.
 */
public synchronized Collection<String> getPropertyNames() {
    if (properties == null) {
        return Collections.emptySet();
    }
    return Collections.unmodifiableSet(new HashSet<String>(properties.keySet()));
}

/**
 * Returns the packet as XML. Every concrete extension of Packet must implement
 * this method. In addition to writing out packet-specific data, every sub-class
 * should also write out the error and the extensions data if they are defined.
 *
 * @return the XML format of the packet as a String.
 */
public abstract String toXML();

/**
 * Returns the extension sub-packets (including properties data) as an XML
 * String, or the Empty String if there are no packet extensions.
 *
 * @return the extension sub-packets as XML or the Empty String if there
 * are no packet extensions.
 */
protected synchronized String getExtensionsXML() {
    StringBuilder buf = new StringBuilder();
    // Add in all standard extension sub-packets.
    for (PacketExtension extension : getExtensions()) {
        buf.append(extension.toXML());
    }
    // Add in packet properties.
    if (properties != null && !properties.isEmpty()) {
        buf.append("<properties xmlns=\"http://www.jivesoftware.com/xmlns/xmpp/properties\">");
        // Loop through all properties and write them out.
        for (String name : getPropertyNames()) {
            Object value = getProperty(name);
            buf.append("<property>");
            buf.append("<name>").append(StringUtils.escapeForXML(name)).append("</name>");
            buf.append("<value type=\"");
            if (value instanceof Integer) {
                buf.append("integer\">").append(value).append("</value>");
            }
            else if (value instanceof Long) {
                buf.append("long\">").append(value).append("</value>");
            }
            else if (value instanceof Float) {
                buf.append("float\">").append(value).append("</value>");
            }
            else if (value instanceof Double) {
                buf.append("double\">").append(value).append("</value>");
            }
            else if (value instanceof Boolean) {
                buf.append("boolean\">").append(value).append("</value>");
            }
            else if (value instanceof String) {
                buf.append("string\">");
                buf.append(StringUtils.escapeForXML((String)value));
                buf.append("</value>");
            }
            // Otherwise, it's a generic Serializable object. Serialized objects are in
            // a binary format, which won't work well inside of XML. Therefore, we base-64
            // encode the binary data before adding it.
            else {
                ByteArrayOutputStream byteStream = null;
                ObjectOutputStream out = null;
                try {
                    byteStream = new ByteArrayOutputStream();
                    out = new ObjectOutputStream(byteStream);
                    out.writeObject(value);
                    buf.append("java-object\">");
                    String encodedVal = StringUtils.encodeBase64(byteStream.toByteArray());
                    buf.append(encodedVal).append("</value>");
                }
                catch (Exception e) {
                    e.printStackTrace();
                }
                finally {
                    if (out != null) {
                        try {
                            out.close();
                        }
                        catch (Exception e) {
                            // Ignore.
                        }
                    }
                    if (byteStream != null) {
                        try {
                            byteStream.close();
                        }
                        catch (Exception e) {
                            // Ignore.
                        }
                    }
                }
            }
            buf.append("</property>");
        }
        buf.append("</properties>");
    }
    return buf.toString();
}

public String getXmlns() {
    return this.xmlns;
}

public static String getDefaultLanguage() {
    return DEFAULT_LANGUAGE;
}


@Override
public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;

    Packet packet = (Packet) o;

    if (error != null ? !error.equals(packet.error) : packet.error != null) { return false; }
    if (from != null ? !from.equals(packet.from) : packet.from != null) { return false; }
    if (!packetExtensions.equals(packet.packetExtensions)) { return false; }
    if (packetID != null ? !packetID.equals(packet.packetID) : packet.packetID != null) {
        return false;
    }
    if (properties != null ? !properties.equals(packet.properties)
            : packet.properties != null) {
        return false;
    }
    if (to != null ? !to.equals(packet.to) : packet.to != null)  { return false; }
    return !(xmlns != null ? !xmlns.equals(packet.xmlns) : packet.xmlns != null);
}

@Override
public int hashCode() {
    int result;
    result = (xmlns != null ? xmlns.hashCode() : 0);
    result = 31 * result + (packetID != null ? packetID.hashCode() : 0);
    result = 31 * result + (to != null ? to.hashCode() : 0);
    result = 31 * result + (from != null ? from.hashCode() : 0);
    result = 31 * result + packetExtensions.hashCode();
    result = 31 * result + properties.hashCode();
    result = 31 * result + (error != null ? error.hashCode() : 0);
    return result;
}
}

最佳答案

尽管我认为这是错误的方法，正如我在您的其他问题中所说的那样。这些是您尝试执行的操作的一些指南。

不需要修改Packet，只需要扩展Message，放入自己的自定义属性即可。这将完成发送所需的操作。要接收，您必须修改 PacketParserUtil.parseMessage()能够确定您的自定义消息或标准消息是否正在发送，并根据需要构建和填充。我不知道您使用的服务器是否存在此问题，因为它不是标准的，但它可能会工作。

另一个更简单的选择是通过 Packet.setProperty() 将您的属性作为属性简单地添加到标准消息中当然还有通过 getProperty() 读取。这将创建和扩展数据包，但不需要自定义工作，因为 Smack 已经读取/写入扩展。

关于java - 使用 asmack for android 在 XMPP 数据包中的消息标记中添加自定义属性？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/12475122/

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java - 使用 asmack for android 在 XMPP 数据包中的消息标记中添加自定义属性？