272 lines
10 KiB
Java
272 lines
10 KiB
Java
/**
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*
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* Copyright 2003-2007 Jive Software.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.packet;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.logging.Logger;
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import org.jivesoftware.smack.util.XmlStringBuilder;
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/**
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* Represents a XMPP error sub-packet. Typically, a server responds to a request that has
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* problems by sending the packet back and including an error packet. Each error has a type,
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* error condition as well as as an optional text explanation. Typical errors are:<p>
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*
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* <table border=1>
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* <hr><td><b>XMPP Error Condition</b></td><td><b>Type</b></td><td><b>RFC 6120 Section</b></td></hr>
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* <tr><td>bad-request</td><td>MODIFY</td><td>8.3.3.1</td></tr>
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* <tr><td>conflict</td><td>CANCEL</td><td>8.3.3.2</td></tr>
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* <tr><td>feature-not-implemented</td><td>CANCEL</td><td>8.3.3.3</td></tr>
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* <tr><td>forbidden</td><td>AUTH</td><td>8.3.3.4</td></tr>
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* <tr><td>gone</td><td>MODIFY</td><td>8.3.3.5</td></tr>
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* <tr><td>internal-server-error</td><td>WAIT</td><td>8.3.3.6</td></tr>
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* <tr><td>item-not-found</td><td>CANCEL</td><td>8.3.3.7</td></tr>
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* <tr><td>jid-malformed</td><td>MODIFY</td><td>8.3.3.8</td></tr>
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* <tr><td>not-acceptable</td><td> MODIFY</td><td>8.3.3.9</td></tr>
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* <tr><td>not-allowed</td><td>CANCEL</td><td>8.3.3.10</td></tr>
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* <tr><td>not-authorized</td><td>AUTH</td><td>8.3.3.11</td></tr>
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* <tr><td>policy-violation</td><td>AUTH</td><td>8.3.3.12</td></tr>
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* <tr><td>recipient-unavailable</td><td>WAIT</td><td>8.3.3.13</td></tr>
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* <tr><td>redirect</td><td>MODIFY</td><td>8.3.3.14</td></tr>
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* <tr><td>registration-required</td><td>AUTH</td><td>8.3.3.15</td></tr>
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* <tr><td>remote-server-not-found</td><td>CANCEL</td><td>8.3.3.16</td></tr>
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* <tr><td>remote-server-timeout</td><td>WAIT</td><td>8.3.3.17</td></tr>
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* <tr><td>resource-constraint</td><td>WAIT</td><td>8.3.3.18</td></tr>
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* <tr><td>service-unavailable</td><td>CANCEL</td><td>8.3.3.19</td></tr>
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* <tr><td>subscription-required</td><td>AUTH</td><td>8.3.3.20</td></tr>
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* <tr><td>undefined-condition</td><td>WAIT</td><td>8.3.3.21</td></tr>
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* <tr><td>unexpected-request</td><td>WAIT</td><td>8.3.3.22</td></tr>
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* </table>
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*
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* @author Matt Tucker
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* @see <a href="http://xmpp.org/rfcs/rfc6120.html#stanzas-error-syntax">RFC 6120 - 8.3.2 Syntax: The Syntax of XMPP error stanzas</a>
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*/
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public class XMPPError extends AbstractError {
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public static final String NAMESPACE = "urn:ietf:params:xml:ns:xmpp-stanzas";
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public static final String ERROR = "error";
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private static final Logger LOGGER = Logger.getLogger(XMPPError.class.getName());
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private static final Map<Condition, Type> CONDITION_TO_TYPE = new HashMap<Condition, Type>();
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static {
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CONDITION_TO_TYPE.put(Condition.bad_request, Type.MODIFY);
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CONDITION_TO_TYPE.put(Condition.conflict, Type.CANCEL);
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CONDITION_TO_TYPE.put(Condition.feature_not_implemented, Type.CANCEL);
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CONDITION_TO_TYPE.put(Condition.forbidden, Type.AUTH);
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CONDITION_TO_TYPE.put(Condition.gone, Type.CANCEL);
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CONDITION_TO_TYPE.put(Condition.internal_server_error, Type.CANCEL);
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CONDITION_TO_TYPE.put(Condition.item_not_found, Type.CANCEL);
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CONDITION_TO_TYPE.put(Condition.jid_malformed, Type.MODIFY);
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CONDITION_TO_TYPE.put(Condition.not_acceptable, Type.MODIFY);
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CONDITION_TO_TYPE.put(Condition.not_allowed, Type.CANCEL);
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CONDITION_TO_TYPE.put(Condition.not_authorized, Type.AUTH);
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CONDITION_TO_TYPE.put(Condition.policy_violation, Type.MODIFY);
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CONDITION_TO_TYPE.put(Condition.recipient_unavailable, Type.WAIT);
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CONDITION_TO_TYPE.put(Condition.redirect, Type.MODIFY);
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CONDITION_TO_TYPE.put(Condition.registration_required, Type.AUTH);
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CONDITION_TO_TYPE.put(Condition.remote_server_not_found, Type.CANCEL);
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CONDITION_TO_TYPE.put(Condition.remote_server_timeout, Type.WAIT);
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CONDITION_TO_TYPE.put(Condition.resource_constraint, Type.WAIT);
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CONDITION_TO_TYPE.put(Condition.service_unavailable, Type.WAIT);
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CONDITION_TO_TYPE.put(Condition.subscription_required, Type.WAIT);
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CONDITION_TO_TYPE.put(Condition.unexpected_request, Type.MODIFY);
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}
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private final Condition condition;
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private final String conditionText;
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private final String errorGenerator;
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private final Type type;
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public XMPPError(Condition condition) {
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this(condition, null, null, null, null, null);
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}
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public XMPPError(Condition condition, PacketExtension applicationSpecificCondition) {
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this(condition, null, null, null, null, Arrays.asList(applicationSpecificCondition));
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}
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/**
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* Creates a new error with the specified type, condition and message.
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* This constructor is used when the condition is not recognized automatically by XMPPError
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* i.e. there is not a defined instance of ErrorCondition or it does not apply the default
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* specification.
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*
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* @param type the error type.
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* @param condition the error condition.
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* @param descriptiveTexts
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* @param extensions list of packet extensions
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*/
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public XMPPError(Condition condition, String conditionText, String errorGenerator, Type type, Map<String, String> descriptiveTexts,
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List<PacketExtension> extensions) {
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super(descriptiveTexts, NAMESPACE, extensions);
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this.condition = condition;
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if (conditionText != null) {
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switch (condition) {
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case gone:
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case redirect:
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break;
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default:
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throw new IllegalArgumentException(
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"Condition text can only be set with condtion types 'gone' and 'redirect', not "
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+ condition);
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}
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}
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this.conditionText = conditionText;
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this.errorGenerator = errorGenerator;
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if (type == null) {
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Type determinedType = CONDITION_TO_TYPE.get(condition);
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if (determinedType == null) {
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LOGGER.warning("Could not determine type for condition: " + condition);
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determinedType = Type.CANCEL;
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}
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this.type = determinedType;
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} else {
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this.type = type;
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}
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}
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/**
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* Returns the error condition.
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*
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* @return the error condition.
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*/
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public Condition getCondition() {
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return condition;
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}
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/**
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* Returns the error type.
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*
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* @return the error type.
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*/
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public Type getType() {
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return type;
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}
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public String getErrorGenerator() {
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return errorGenerator;
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}
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public String getConditionText() {
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return conditionText;
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}
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/**
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* Returns the error as XML.
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*
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* @return the error as XML.
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*/
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public XmlStringBuilder toXML() {
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XmlStringBuilder xml = new XmlStringBuilder();
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xml.halfOpenElement(ERROR);
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xml.attribute("type", type.toString());
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xml.optAttribute("by", errorGenerator);
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xml.rightAngleBracket();
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xml.halfOpenElement(condition.toString());
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xml.xmlnsAttribute(NAMESPACE);
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xml.closeEmptyElement();
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addDescriptiveTextsAndExtensions(xml);
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xml.closeElement(ERROR);
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return xml;
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}
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public static XMPPError from(Condition condition, String descriptiveText) {
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Map<String, String> descriptiveTexts = new HashMap<String, String>();
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descriptiveTexts.put("en", descriptiveText);
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return new XMPPError(condition, null, null, null, descriptiveTexts, null);
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}
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/**
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* A class to represent the type of the Error. The types are:
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*
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* <ul>
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* <li>XMPPError.Type.WAIT - retry after waiting (the error is temporary)
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* <li>XMPPError.Type.CANCEL - do not retry (the error is unrecoverable)
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* <li>XMPPError.Type.MODIFY - retry after changing the data sent
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* <li>XMPPError.Type.AUTH - retry after providing credentials
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* <li>XMPPError.Type.CONTINUE - proceed (the condition was only a warning)
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* </ul>
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*/
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public static enum Type {
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WAIT,
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CANCEL,
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MODIFY,
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AUTH,
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CONTINUE;
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@Override
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public String toString() {
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// Locale.US not required, since Type consists only of ASCII chars
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return name().toLowerCase();
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}
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public static Type fromString(String string) {
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// Locale.US not required, since Type consists only of ASCII chars
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string = string.toUpperCase();
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return Type.valueOf(string);
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}
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}
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public enum Condition {
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bad_request,
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conflict,
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feature_not_implemented,
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forbidden,
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gone,
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internal_server_error,
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item_not_found,
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jid_malformed,
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not_acceptable,
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not_allowed,
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not_authorized,
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policy_violation,
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recipient_unavailable,
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redirect,
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registration_required,
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remote_server_not_found,
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remote_server_timeout,
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resource_constraint,
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service_unavailable,
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subscription_required,
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undefined_condition,
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unexpected_request;
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@Override
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public String toString() {
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return this.name().replace('_', '-');
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}
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public static Condition fromString(String string) {
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string = string.replace('-', '_');
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Condition condition = null;
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try {
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condition = Condition.valueOf(string);
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} catch (Exception e) {
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throw new IllegalStateException("Could not transform string '" + string + "' to XMPPErrorConditoin", e);
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}
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return condition;
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}
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}
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}
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