From 7382e3af9769f76fe4e19934a59e45a3f9858332 Mon Sep 17 00:00:00 2001 From: steckbrief Date: Sun, 3 May 2015 22:25:46 +0200 Subject: renaming eu.siacs.conversations to de.thedevstack.conversationsplus "renaming eu.siacs.conversations to de.thedevstack.conversationsplus" package renaming completed --- .../conversationsplus/xmpp/jid/Jid.java | 219 +++++++++++++++++++++ 1 file changed, 219 insertions(+) create mode 100644 src/main/java/de/thedevstack/conversationsplus/xmpp/jid/Jid.java (limited to 'src/main/java/de/thedevstack/conversationsplus/xmpp/jid/Jid.java') diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/Jid.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/Jid.java new file mode 100644 index 00000000..43b0e878 --- /dev/null +++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/Jid.java @@ -0,0 +1,219 @@ +package de.thedevstack.conversationsplus.xmpp.jid; + +import android.util.LruCache; + +import net.java.otr4j.session.SessionID; + +import java.net.IDN; + +import de.thedevstack.conversationsplus.Config; +import gnu.inet.encoding.Stringprep; +import gnu.inet.encoding.StringprepException; + +/** + * The `Jid' class provides an immutable representation of a JID. + */ +public final class Jid { + + private static LruCache cache = new LruCache<>(1024); + + private final String localpart; + private final String domainpart; + private final String resourcepart; + + // It's much more efficient to store the ful JID as well as the parts instead of figuring them + // all out every time (since some characters are displayed but aren't used for comparisons). + private final String displayjid; + + public String getLocalpart() { + return localpart; + } + + public String getDomainpart() { + return IDN.toUnicode(domainpart); + } + + public String getResourcepart() { + return resourcepart; + } + + public static Jid fromSessionID(final SessionID id) throws InvalidJidException{ + if (id.getUserID().isEmpty()) { + return Jid.fromString(id.getAccountID()); + } else { + return Jid.fromString(id.getAccountID()+"/"+id.getUserID()); + } + } + + public static Jid fromString(final String jid) throws InvalidJidException { + return Jid.fromString(jid, false); + } + + public static Jid fromString(final String jid, final boolean safe) throws InvalidJidException { + return new Jid(jid, safe); + } + + public static Jid fromParts(final String localpart, + final String domainpart, + final String resourcepart) throws InvalidJidException { + String out; + if (localpart == null || localpart.isEmpty()) { + out = domainpart; + } else { + out = localpart + "@" + domainpart; + } + if (resourcepart != null && !resourcepart.isEmpty()) { + out = out + "/" + resourcepart; + } + return new Jid(out, false); + } + + private Jid(final String jid, final boolean safe) throws InvalidJidException { + if (jid == null) throw new InvalidJidException(InvalidJidException.IS_NULL); + + Jid fromCache = Jid.cache.get(jid); + if (fromCache != null) { + displayjid = fromCache.displayjid; + localpart = fromCache.localpart; + domainpart = fromCache.domainpart; + resourcepart = fromCache.resourcepart; + return; + } + + // Hackish Android way to count the number of chars in a string... should work everywhere. + final int atCount = jid.length() - jid.replace("@", "").length(); + final int slashCount = jid.length() - jid.replace("/", "").length(); + + // Throw an error if there's anything obvious wrong with the JID... + if (jid.isEmpty() || jid.length() > 3071) { + throw new InvalidJidException(InvalidJidException.INVALID_LENGTH); + } + + // Go ahead and check if the localpart or resourcepart is empty. + if (jid.startsWith("@") || (jid.endsWith("@") && slashCount == 0) || jid.startsWith("/") || (jid.endsWith("/") && slashCount < 2)) { + throw new InvalidJidException(InvalidJidException.INVALID_CHARACTER); + } + + String finaljid; + + final int domainpartStart; + final int atLoc = jid.indexOf("@"); + final int slashLoc = jid.indexOf("/"); + // If there is no "@" in the JID (eg. "example.net" or "example.net/resource") + // or there are one or more "@" signs but they're all in the resourcepart (eg. "example.net/@/rp@"): + if (atCount == 0 || (atCount > 0 && slashLoc != -1 && atLoc > slashLoc)) { + localpart = ""; + finaljid = ""; + domainpartStart = 0; + } else { + final String lp = jid.substring(0, atLoc); + try { + localpart = Config.DISABLE_STRING_PREP || safe ? lp : Stringprep.nodeprep(lp); + } catch (final StringprepException e) { + throw new InvalidJidException(InvalidJidException.STRINGPREP_FAIL, e); + } + if (localpart.isEmpty() || localpart.length() > 1023) { + throw new InvalidJidException(InvalidJidException.INVALID_PART_LENGTH); + } + domainpartStart = atLoc + 1; + finaljid = lp + "@"; + } + + final String dp; + if (slashCount > 0) { + final String rp = jid.substring(slashLoc + 1, jid.length()); + try { + resourcepart = Config.DISABLE_STRING_PREP || safe ? rp : Stringprep.resourceprep(rp); + } catch (final StringprepException e) { + throw new InvalidJidException(InvalidJidException.STRINGPREP_FAIL, e); + } + if (resourcepart.isEmpty() || resourcepart.length() > 1023) { + throw new InvalidJidException(InvalidJidException.INVALID_PART_LENGTH); + } + dp = IDN.toUnicode(jid.substring(domainpartStart, slashLoc), IDN.USE_STD3_ASCII_RULES); + finaljid = finaljid + dp + "/" + rp; + } else { + resourcepart = ""; + dp = IDN.toUnicode(jid.substring(domainpartStart, jid.length()), + IDN.USE_STD3_ASCII_RULES); + finaljid = finaljid + dp; + } + + // Remove trailing "." before storing the domain part. + if (dp.endsWith(".")) { + try { + domainpart = IDN.toASCII(dp.substring(0, dp.length() - 1), IDN.USE_STD3_ASCII_RULES); + } catch (final IllegalArgumentException e) { + throw new InvalidJidException(e); + } + } else { + try { + domainpart = IDN.toASCII(dp, IDN.USE_STD3_ASCII_RULES); + } catch (final IllegalArgumentException e) { + throw new InvalidJidException(e); + } + } + + // TODO: Find a proper domain validation library; validate individual parts, separators, etc. + if (domainpart.isEmpty() || domainpart.length() > 1023) { + throw new InvalidJidException(InvalidJidException.INVALID_PART_LENGTH); + } + + Jid.cache.put(jid, this); + + this.displayjid = finaljid; + } + + public Jid toBareJid() { + try { + return resourcepart.isEmpty() ? this : fromParts(localpart, domainpart, ""); + } catch (final InvalidJidException e) { + // This should never happen. + return null; + } + } + + public Jid toDomainJid() { + try { + return resourcepart.isEmpty() && localpart.isEmpty() ? this : fromString(getDomainpart()); + } catch (final InvalidJidException e) { + // This should never happen. + return null; + } + } + + @Override + public String toString() { + return displayjid; + } + + @Override + public boolean equals(final Object o) { + if (this == o) return true; + if (o == null || getClass() != o.getClass()) return false; + + final Jid jid = (Jid) o; + + return jid.hashCode() == this.hashCode(); + } + + @Override + public int hashCode() { + int result = localpart.hashCode(); + result = 31 * result + domainpart.hashCode(); + result = 31 * result + resourcepart.hashCode(); + return result; + } + + public boolean hasLocalpart() { + return !localpart.isEmpty(); + } + + public boolean isBareJid() { + return this.resourcepart.isEmpty(); + } + + public boolean isDomainJid() { + return !this.hasLocalpart(); + } +} -- cgit v1.2.3