/*
* Copyright (c) 1999, 2002, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.jndi.ldap;
import javax.naming.*;
import java.net.MalformedURLException;
import java.io.UnsupportedEncodingException;
import java.util.StringTokenizer;
import com.sun.jndi.toolkit.url.Uri;
import com.sun.jndi.toolkit.url.UrlUtil;
/*
* Extract components of an LDAP URL.
*
* The format of an LDAP URL is defined in RFC 2255 as follows:
*
* ldapurl = scheme "://" [hostport] ["/"
* [dn ["?" [attributes] ["?" [scope]
* ["?" [filter] ["?" extensions]]]]]]
* scheme = "ldap"
* attributes = attrdesc *("," attrdesc)
* scope = "base" / "one" / "sub"
* dn = distinguishedName from Section 3 of [1]
* hostport = hostport from Section 5 of RFC 1738 [5]
* attrdesc = AttributeDescription from Section 4.1.5 of [2]
* filter = filter from Section 4 of [4]
* extensions = extension *("," extension)
* extension = ["!"] extype ["=" exvalue]
* extype = token / xtoken
* exvalue = LDAPString from section 4.1.2 of [2]
* token = oid from section 4.1 of [3]
* xtoken = ("X-" / "x-") token
*
* For example,
*
* ldap://ldap.itd.umich.edu/o=University%20of%20Michigan,c=US
* ldap://host.com:6666/o=IMC,c=US??sub?(cn=Babs%20Jensen)
*
* This class also supports ldaps URLs.
*/
final public class LdapURL extends Uri {
private boolean useSsl = false;
private String DN = null;
private String attributes = null;
private String scope = null;
private String filter = null;
private String extensions = null;
/**
* Creates an LdapURL object from an LDAP URL string.
*/
public LdapURL(String url) throws NamingException {
super();
try {
init(url); // scheme, host, port, path, query
useSsl = scheme.equalsIgnoreCase("ldaps");
if (! (scheme.equalsIgnoreCase("ldap") || useSsl)) {
throw new MalformedURLException("Not an LDAP URL: " + url);
}
parsePathAndQuery(); // DN, attributes, scope, filter, extensions
} catch (MalformedURLException e) {
NamingException ne = new NamingException("Cannot parse url: " + url);
ne.setRootCause(e);
throw ne;
} catch (UnsupportedEncodingException e) {
NamingException ne = new NamingException("Cannot parse url: " + url);
ne.setRootCause(e);
throw ne;
}
}
/**
* Returns true if the URL is an LDAPS URL.
*/
public boolean useSsl() {
return useSsl;
}
/**
* Returns the LDAP URL's distinguished name.
*/
public String getDN() {
return DN;
}
/**
* Returns the LDAP URL's attributes.
*/
public String getAttributes() {
return attributes;
}
/**
* Returns the LDAP URL's scope.
*/
public String getScope() {
return scope;
}
/**
* Returns the LDAP URL's filter.
*/
public String getFilter() {
return filter;
}
/**
* Returns the LDAP URL's extensions.
*/
public String getExtensions() {
return extensions;
}
/**
* Given a space-separated list of LDAP URLs, returns an array of strings.
*/
public static String[] fromList(String urlList) throws NamingException {
String[] urls = new String[(urlList.length() + 1) / 2];
int i = 0; // next available index in urls
StringTokenizer st = new StringTokenizer(urlList, " ");
while (st.hasMoreTokens()) {
urls[i++] = st.nextToken();
}
String[] trimmed = new String[i];
System.arraycopy(urls, 0, trimmed, 0, i);
return trimmed;
}
/**
* Determines whether an LDAP URL has query components.
*/
public static boolean hasQueryComponents(String url) {
return (url.lastIndexOf('?') != -1);
}
/*
* Assembles an LDAP or LDAPS URL string from its components.
* If "host" is an IPv6 literal, it may optionally include delimiting
* brackets.
*/
static String toUrlString(String host, int port, String dn, boolean useSsl)
{
try {
String h = (host != null) ? host : "";
if ((h.indexOf(':') != -1) && (h.charAt(0) != '[')) {
h = "[" + h + "]"; // IPv6 literal
}
String p = (port != -1) ? (":" + port) : "";
String d = (dn != null) ? ("/" + UrlUtil.encode(dn, "UTF8")) : "";
return useSsl ? "ldaps://" + h + p + d : "ldap://" + h + p + d;
} catch (UnsupportedEncodingException e) {
// UTF8 should always be supported
throw new IllegalStateException("UTF-8 encoding unavailable");
}
}
/*
* Parses the path and query components of an URL and sets this
* object's fields accordingly.
*/
private void parsePathAndQuery() throws MalformedURLException,
UnsupportedEncodingException {
// path begins with a '/' or is empty
if (path.equals("")) {
return;
}
DN = path.startsWith("/") ? path.substring(1) : path;
if (DN.length() > 0) {
DN = UrlUtil.decode(DN, "UTF8");
}
// query begins with a '?' or is null
if (query == null || query.length() < 2) {
return;
}
int currentIndex = 1;
int nextQmark;
int endIndex;
// attributes:
nextQmark = query.indexOf('?', currentIndex);
endIndex = nextQmark == -1 ? query.length() : nextQmark;
if (endIndex - currentIndex > 0) {
attributes = query.substring(currentIndex, endIndex);
}
currentIndex = endIndex + 1;
if (currentIndex >= query.length()) {
return;
}
// scope:
nextQmark = query.indexOf('?', currentIndex);
endIndex = nextQmark == -1 ? query.length() : nextQmark;
if (endIndex - currentIndex > 0) {
scope = query.substring(currentIndex, endIndex);
}
currentIndex = endIndex + 1;
if (currentIndex >= query.length()) {
return;
}
// filter:
nextQmark = query.indexOf('?', currentIndex);
endIndex = nextQmark == -1 ? query.length() : nextQmark;
if (endIndex - currentIndex > 0) {
filter = query.substring(currentIndex, endIndex);
filter = UrlUtil.decode(filter, "UTF8");
}
currentIndex = endIndex + 1;
if (currentIndex >= query.length()) {
return;
}
// extensions:
if (query.length() - currentIndex > 0) {
extensions = query.substring(currentIndex);
extensions = UrlUtil.decode(extensions, "UTF8");
}
}
/*
public static void main(String[] args) throws Exception {
LdapURL url = new LdapURL(args[0]);
System.out.println("Example LDAP URL: " + url.toString());
System.out.println(" scheme: " + url.getScheme());
System.out.println(" host: " + url.getHost());
System.out.println(" port: " + url.getPort());
System.out.println(" DN: " + url.getDN());
System.out.println(" attrs: " + url.getAttributes());
System.out.println(" scope: " + url.getScope());
System.out.println(" filter: " + url.getFilter());
System.out.println(" extens: " + url.getExtensions());
System.out.println("");
}
*/
}