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Implement xml:lang support in ConnectionConfiguration and AbstractXMPPConnection

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This patch makes it possible to change the stream-level language as part
of the connection configuration, to allow a properly implemented
entities to provide i18n'ed response messages. The Locale type is used
for this configuration, and the effective language string can be
obtained via `ConnectionConfiguration.getXmlLang()`.

This code does not cover XMPPBOSHConnection!

Signed-off-by: Georg Lukas <georg@op-co.de>
This commit is contained in:
Georg Lukas 2019-07-26 15:02:47 +02:00 committed by Florian Schmaus
parent 12cbeede57
commit 6a0e0f0f67
2 changed files with 48 additions and 1 deletions
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2
smack-core/src/main/java/org/jivesoftware/smack/AbstractXMPPConnection.java
View file

@ -2012,7 +2012,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
from = XmppStringUtils.completeJidFrom(localpart, to);
}
String id = getStreamId();
sendNonza(new StreamOpen(to, from, id));
sendNonza(new StreamOpen(to, from, id, config.getXmlLang(), StreamOpen.StreamContentNamespace.client));
}
public static final class SmackTlsContext {

47
smack-core/src/main/java/org/jivesoftware/smack/ConnectionConfiguration.java
View file

@ -24,6 +24,7 @@ import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Locale;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
@ -118,6 +119,8 @@ public abstract class ConnectionConfiguration {
private final String password;
private final Resourcepart resource;
private final Locale language;
/**
* The optional SASL authorization identity (see RFC 6120 § 6.3.8).
*/
@ -165,6 +168,8 @@ public abstract class ConnectionConfiguration {
// Resource can be null, this means that the server must provide one
resource = builder.resource;
language = builder.language;
xmppServiceDomain = builder.xmppServiceDomain;
if (xmppServiceDomain == null) {
throw new IllegalArgumentException("Must define the XMPP domain");
@ -476,6 +481,34 @@ public abstract class ConnectionConfiguration {
return resource;
}
/**
* Returns the stream language to use when connecting to the server.
*
* @return the stream language to use when connecting to the server.
*/
public Locale getLanguage() {
return language;
}
/**
* Returns the xml:lang string of the stream language to use when connecting to the server.
*
* <p>If the developer sets the language to null, this will also return null, leading to
* the removal of the xml:lang tag from the stream. If a Locale("") is configured, this will
* return "", which can be used as an override.</p>
*
* @return the stream language to use when connecting to the server.
*/
public String getXmlLang() {
// TODO: Change to Locale.toLanguageTag() once Smack's minimum Android API level is 21 or higher.
// This will need a workaround for new Locale("").getLanguageTag() returning "und". Expected
// behavior of this function:
// - returns null if language is null
// - returns "" if language.getLanguage() returns the empty string
// - returns language.toLanguageTag() otherwise
return language != null ? language.toString().replace("_", "-") : null;
}
/**
* Returns the optional XMPP address to be requested as the SASL authorization identity.
*
@ -564,6 +597,7 @@ public abstract class ConnectionConfiguration {
private CharSequence username;
private String password;
private Resourcepart resource;
private Locale language = Locale.ENGLISH;
private boolean sendPresence = true;
private ProxyInfo proxy;
private CallbackHandler callbackHandler;
@ -688,6 +722,19 @@ public abstract class ConnectionConfiguration {
return getThis();
}
/**
* Set the stream language.
*
* @param language the language to use.
* @return a reference to this builder.
* @see <a href="https://tools.ietf.org/html/rfc6120#section-4.7.4">RFC 6120 § 4.7.4</a>
* @see <a href="https://www.w3.org/TR/xml/#sec-lang-tag">XML 1.0 § 2.12 Language Identification</a>
*/
public B setLanguage(Locale language) {
this.language = language;
return getThis();
}
/**
* Set the resource we are requesting from the server.
*