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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.catalina.mapper;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArrayList;
import javax.servlet.http.MappingMatch;
import org.apache.catalina.Context;
import org.apache.catalina.Host;
import org.apache.catalina.WebResource;
import org.apache.catalina.WebResourceRoot;
import org.apache.catalina.Wrapper;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.buf.Ascii;
import org.apache.tomcat.util.buf.CharChunk;
import org.apache.tomcat.util.buf.MessageBytes;
import org.apache.tomcat.util.res.StringManager;
/**
* Mapper, which implements the servlet API mapping rules (which are derived from the HTTP rules).
*
* @author Remy Maucherat
*/
public final class Mapper {
private static final Log log = LogFactory.getLog(Mapper.class);
private static final StringManager sm = StringManager.getManager(Mapper.class);
// ----------------------------------------------------- Instance Variables
/**
* Array containing the virtual hosts definitions.
*/
// Package private to facilitate testing
volatile MappedHost[] hosts = new MappedHost[0];
/**
* Default host name.
*/
private volatile String defaultHostName = null;
private volatile MappedHost defaultHost = null;
/**
* Mapping from Context object to Context version to support RequestDispatcher mappings.
*/
private final Map contextObjectToContextVersionMap = new ConcurrentHashMap<>();
// --------------------------------------------------------- Public Methods
/**
* Set default host.
*
* @param defaultHostName Default host name
*/
public synchronized void setDefaultHostName(String defaultHostName) {
this.defaultHostName = renameWildcardHost(defaultHostName);
if (this.defaultHostName == null) {
defaultHost = null;
} else {
defaultHost = exactFind(hosts, this.defaultHostName);
}
}
/**
* Add a new host to the mapper.
*
* @param name Virtual host name
* @param aliases Alias names for the virtual host
* @param host Host object
*/
public synchronized void addHost(String name, String[] aliases, Host host) {
name = renameWildcardHost(name);
MappedHost[] newHosts = new MappedHost[hosts.length + 1];
MappedHost newHost = new MappedHost(name, host);
if (insertMap(hosts, newHosts, newHost)) {
hosts = newHosts;
if (newHost.name.equals(defaultHostName)) {
defaultHost = newHost;
}
if (log.isDebugEnabled()) {
log.debug(sm.getString("mapper.addHost.success", name));
}
} else {
MappedHost duplicate = hosts[find(hosts, name)];
if (duplicate.object == host) {
// The host is already registered in the mapper.
// E.g. it might have been added by addContextVersion()
if (log.isDebugEnabled()) {
log.debug(sm.getString("mapper.addHost.sameHost", name));
}
newHost = duplicate;
} else {
log.error(sm.getString("mapper.duplicateHost", name, duplicate.getRealHostName()));
// Do not add aliases, as removeHost(hostName) won't be able to
// remove them
return;
}
}
List newAliases = new ArrayList<>(aliases.length);
for (String alias : aliases) {
alias = renameWildcardHost(alias);
MappedHost newAlias = new MappedHost(alias, newHost);
if (addHostAliasImpl(newAlias)) {
newAliases.add(newAlias);
}
}
newHost.addAliases(newAliases);
}
/**
* Remove a host from the mapper.
*
* @param name Virtual host name
*/
public synchronized void removeHost(String name) {
name = renameWildcardHost(name);
// Find and remove the old host
MappedHost host = exactFind(hosts, name);
if (host == null || host.isAlias()) {
return;
}
MappedHost[] newHosts = hosts.clone();
// Remove real host and all its aliases
int j = 0;
for (int i = 0; i < newHosts.length; i++) {
if (newHosts[i].getRealHost() != host) {
newHosts[j++] = newHosts[i];
}
}
hosts = Arrays.copyOf(newHosts, j);
}
/**
* Add an alias to an existing host.
*
* @param name The name of the host
* @param alias The alias to add
*/
public synchronized void addHostAlias(String name, String alias) {
MappedHost realHost = exactFind(hosts, name);
if (realHost == null) {
// Should not be adding an alias for a host that doesn't exist but
// just in case...
return;
}
alias = renameWildcardHost(alias);
MappedHost newAlias = new MappedHost(alias, realHost);
if (addHostAliasImpl(newAlias)) {
realHost.addAlias(newAlias);
}
}
private synchronized boolean addHostAliasImpl(MappedHost newAlias) {
MappedHost[] newHosts = new MappedHost[hosts.length + 1];
if (insertMap(hosts, newHosts, newAlias)) {
hosts = newHosts;
if (newAlias.name.equals(defaultHostName)) {
defaultHost = newAlias;
}
if (log.isDebugEnabled()) {
log.debug(sm.getString("mapper.addHostAlias.success", newAlias.name, newAlias.getRealHostName()));
}
return true;
} else {
MappedHost duplicate = hosts[find(hosts, newAlias.name)];
if (duplicate.getRealHost() == newAlias.getRealHost()) {
// A duplicate Alias for the same Host.
// A harmless redundancy. E.g.
// localhost
if (log.isDebugEnabled()) {
log.debug(sm.getString("mapper.addHostAlias.sameHost", newAlias.name, newAlias.getRealHostName()));
}
return false;
}
log.error(sm.getString("mapper.duplicateHostAlias", newAlias.name, newAlias.getRealHostName(),
duplicate.getRealHostName()));
return false;
}
}
/**
* Remove a host alias
*
* @param alias The alias to remove
*/
public synchronized void removeHostAlias(String alias) {
alias = renameWildcardHost(alias);
// Find and remove the alias
MappedHost hostMapping = exactFind(hosts, alias);
if (hostMapping == null || !hostMapping.isAlias()) {
return;
}
MappedHost[] newHosts = new MappedHost[hosts.length - 1];
if (removeMap(hosts, newHosts, alias)) {
hosts = newHosts;
hostMapping.getRealHost().removeAlias(hostMapping);
}
}
/**
* Replace {@link MappedHost#contextList} field in realHost and all its aliases with a new value.
*/
private void updateContextList(MappedHost realHost, ContextList newContextList) {
realHost.contextList = newContextList;
for (MappedHost alias : realHost.getAliases()) {
alias.contextList = newContextList;
}
}
/**
* Add a new Context to an existing Host.
*
* @param hostName Virtual host name this context belongs to
* @param host Host object
* @param path Context path
* @param version Context version
* @param context Context object
* @param welcomeResources Welcome files defined for this context
* @param resources Static resources of the context
* @param wrappers Information on wrapper mappings
*/
public void addContextVersion(String hostName, Host host, String path, String version, Context context,
String[] welcomeResources, WebResourceRoot resources, Collection wrappers) {
hostName = renameWildcardHost(hostName);
MappedHost mappedHost = exactFind(hosts, hostName);
if (mappedHost == null) {
addHost(hostName, new String[0], host);
mappedHost = exactFind(hosts, hostName);
if (mappedHost == null) {
log.error(sm.getString("mapper.addContext.noHost", hostName));
return;
}
}
if (mappedHost.isAlias()) {
log.error(sm.getString("mapper.addContext.hostIsAlias", hostName));
return;
}
int slashCount = slashCount(path);
synchronized (mappedHost) {
ContextVersion newContextVersion =
new ContextVersion(version, path, slashCount, context, resources, welcomeResources);
if (wrappers != null) {
addWrappers(newContextVersion, wrappers);
}
ContextList contextList = mappedHost.contextList;
MappedContext mappedContext = exactFind(contextList.contexts, path);
if (mappedContext == null) {
mappedContext = new MappedContext(path, newContextVersion);
ContextList newContextList = contextList.addContext(mappedContext, slashCount);
if (newContextList != null) {
updateContextList(mappedHost, newContextList);
contextObjectToContextVersionMap.put(context, newContextVersion);
}
} else {
ContextVersion[] contextVersions = mappedContext.versions;
ContextVersion[] newContextVersions = new ContextVersion[contextVersions.length + 1];
if (insertMap(contextVersions, newContextVersions, newContextVersion)) {
mappedContext.versions = newContextVersions;
contextObjectToContextVersionMap.put(context, newContextVersion);
} else {
// Re-registration after Context.reload()
// Replace ContextVersion with the new one
int pos = find(contextVersions, version);
if (pos >= 0 && contextVersions[pos].name.equals(version)) {
contextVersions[pos] = newContextVersion;
contextObjectToContextVersionMap.put(context, newContextVersion);
}
}
}
}
}
/**
* Remove a context from an existing host.
*
* @param ctxt The actual context
* @param hostName Virtual host name this context belongs to
* @param path Context path
* @param version Context version
*/
public void removeContextVersion(Context ctxt, String hostName, String path, String version) {
hostName = renameWildcardHost(hostName);
contextObjectToContextVersionMap.remove(ctxt);
MappedHost host = exactFind(hosts, hostName);
if (host == null || host.isAlias()) {
return;
}
synchronized (host) {
ContextList contextList = host.contextList;
MappedContext context = exactFind(contextList.contexts, path);
if (context == null) {
return;
}
ContextVersion[] contextVersions = context.versions;
ContextVersion[] newContextVersions = new ContextVersion[contextVersions.length - 1];
if (removeMap(contextVersions, newContextVersions, version)) {
if (newContextVersions.length == 0) {
// Remove the context
ContextList newContextList = contextList.removeContext(path);
if (newContextList != null) {
updateContextList(host, newContextList);
}
} else {
context.versions = newContextVersions;
}
}
}
}
/**
* Mark a context as being reloaded. Reversion of this state is performed by calling
* addContextVersion(...) when context starts up.
*
* @param ctxt The actual context
* @param hostName Virtual host name this context belongs to
* @param contextPath Context path
* @param version Context version
*/
public void pauseContextVersion(Context ctxt, String hostName, String contextPath, String version) {
hostName = renameWildcardHost(hostName);
ContextVersion contextVersion = findContextVersion(hostName, contextPath, version, true);
if (contextVersion == null || !ctxt.equals(contextVersion.object)) {
return;
}
contextVersion.markPaused();
}
private ContextVersion findContextVersion(String hostName, String contextPath, String version, boolean silent) {
MappedHost host = exactFind(hosts, hostName);
if (host == null || host.isAlias()) {
if (!silent) {
log.error(sm.getString("mapper.findContext.noHostOrAlias", hostName));
}
return null;
}
MappedContext context = exactFind(host.contextList.contexts, contextPath);
if (context == null) {
if (!silent) {
log.error(sm.getString("mapper.findContext.noContext", contextPath));
}
return null;
}
ContextVersion contextVersion = exactFind(context.versions, version);
if (contextVersion == null) {
if (!silent) {
log.error(sm.getString("mapper.findContext.noContextVersion", contextPath, version));
}
return null;
}
return contextVersion;
}
public void addWrapper(String hostName, String contextPath, String version, String path, Wrapper wrapper,
boolean jspWildCard, boolean resourceOnly) {
hostName = renameWildcardHost(hostName);
ContextVersion contextVersion = findContextVersion(hostName, contextPath, version, false);
if (contextVersion == null) {
return;
}
addWrapper(contextVersion, path, wrapper, jspWildCard, resourceOnly);
}
public void addWrappers(String hostName, String contextPath, String version,
Collection wrappers) {
hostName = renameWildcardHost(hostName);
ContextVersion contextVersion = findContextVersion(hostName, contextPath, version, false);
if (contextVersion == null) {
return;
}
addWrappers(contextVersion, wrappers);
}
/**
* Adds wrappers to the given context.
*
* @param contextVersion The context to which to add the wrappers
* @param wrappers Information on wrapper mappings
*/
private void addWrappers(ContextVersion contextVersion, Collection wrappers) {
for (WrapperMappingInfo wrapper : wrappers) {
addWrapper(contextVersion, wrapper.getMapping(), wrapper.getWrapper(), wrapper.isJspWildCard(),
wrapper.isResourceOnly());
}
}
/**
* Adds a wrapper to the given context.
*
* @param context The context to which to add the wrapper
* @param path Wrapper mapping
* @param wrapper The Wrapper object
* @param jspWildCard true if the wrapper corresponds to the JspServlet and the mapping path contains a wildcard;
* false otherwise
* @param resourceOnly true if this wrapper always expects a physical resource to be present (such as a JSP)
*/
protected void addWrapper(ContextVersion context, String path, Wrapper wrapper, boolean jspWildCard,
boolean resourceOnly) {
synchronized (context) {
if (path.endsWith("/*")) {
// Wildcard wrapper
String name = path.substring(0, path.length() - 2);
MappedWrapper newWrapper = new MappedWrapper(name, wrapper, jspWildCard, resourceOnly);
MappedWrapper[] oldWrappers = context.wildcardWrappers;
MappedWrapper[] newWrappers = new MappedWrapper[oldWrappers.length + 1];
if (insertMap(oldWrappers, newWrappers, newWrapper)) {
context.wildcardWrappers = newWrappers;
int slashCount = slashCount(newWrapper.name);
if (slashCount > context.nesting) {
context.nesting = slashCount;
}
}
} else if (path.startsWith("*.")) {
// Extension wrapper
String name = path.substring(2);
MappedWrapper newWrapper = new MappedWrapper(name, wrapper, jspWildCard, resourceOnly);
MappedWrapper[] oldWrappers = context.extensionWrappers;
MappedWrapper[] newWrappers = new MappedWrapper[oldWrappers.length + 1];
if (insertMap(oldWrappers, newWrappers, newWrapper)) {
context.extensionWrappers = newWrappers;
}
} else if (path.equals("/")) {
// Default wrapper
MappedWrapper newWrapper = new MappedWrapper("", wrapper, jspWildCard, resourceOnly);
context.defaultWrapper = newWrapper;
} else {
// Exact wrapper
final String name;
if (path.length() == 0) {
// Special case for the Context Root mapping which is
// treated as an exact match
name = "/";
} else {
name = path;
}
MappedWrapper newWrapper = new MappedWrapper(name, wrapper, jspWildCard, resourceOnly);
MappedWrapper[] oldWrappers = context.exactWrappers;
MappedWrapper[] newWrappers = new MappedWrapper[oldWrappers.length + 1];
if (insertMap(oldWrappers, newWrappers, newWrapper)) {
context.exactWrappers = newWrappers;
}
}
}
}
/**
* Remove a wrapper from an existing context.
*
* @param hostName Virtual host name this wrapper belongs to
* @param contextPath Context path this wrapper belongs to
* @param version Context version this wrapper belongs to
* @param path Wrapper mapping
*/
public void removeWrapper(String hostName, String contextPath, String version, String path) {
hostName = renameWildcardHost(hostName);
ContextVersion contextVersion = findContextVersion(hostName, contextPath, version, true);
if (contextVersion == null || contextVersion.isPaused()) {
return;
}
removeWrapper(contextVersion, path);
}
protected void removeWrapper(ContextVersion context, String path) {
if (log.isDebugEnabled()) {
log.debug(sm.getString("mapper.removeWrapper", context.name, path));
}
synchronized (context) {
if (path.endsWith("/*")) {
// Wildcard wrapper
String name = path.substring(0, path.length() - 2);
MappedWrapper[] oldWrappers = context.wildcardWrappers;
if (oldWrappers.length == 0) {
return;
}
MappedWrapper[] newWrappers = new MappedWrapper[oldWrappers.length - 1];
if (removeMap(oldWrappers, newWrappers, name)) {
// Recalculate nesting
context.nesting = 0;
for (MappedWrapper newWrapper : newWrappers) {
int slashCount = slashCount(newWrapper.name);
if (slashCount > context.nesting) {
context.nesting = slashCount;
}
}
context.wildcardWrappers = newWrappers;
}
} else if (path.startsWith("*.")) {
// Extension wrapper
String name = path.substring(2);
MappedWrapper[] oldWrappers = context.extensionWrappers;
if (oldWrappers.length == 0) {
return;
}
MappedWrapper[] newWrappers = new MappedWrapper[oldWrappers.length - 1];
if (removeMap(oldWrappers, newWrappers, name)) {
context.extensionWrappers = newWrappers;
}
} else if (path.equals("/")) {
// Default wrapper
context.defaultWrapper = null;
} else {
// Exact wrapper
String name;
if (path.length() == 0) {
// Special case for the Context Root mapping which is
// treated as an exact match
name = "/";
} else {
name = path;
}
MappedWrapper[] oldWrappers = context.exactWrappers;
if (oldWrappers.length == 0) {
return;
}
MappedWrapper[] newWrappers = new MappedWrapper[oldWrappers.length - 1];
if (removeMap(oldWrappers, newWrappers, name)) {
context.exactWrappers = newWrappers;
}
}
}
}
/**
* Add a welcome file to the given context.
*
* @param hostName The host where the given context can be found
* @param contextPath The path of the given context
* @param version The version of the given context
* @param welcomeFile The welcome file to add
*/
public void addWelcomeFile(String hostName, String contextPath, String version, String welcomeFile) {
hostName = renameWildcardHost(hostName);
ContextVersion contextVersion = findContextVersion(hostName, contextPath, version, false);
if (contextVersion == null) {
return;
}
int len = contextVersion.welcomeResources.length + 1;
String[] newWelcomeResources = new String[len];
System.arraycopy(contextVersion.welcomeResources, 0, newWelcomeResources, 0, len - 1);
newWelcomeResources[len - 1] = welcomeFile;
contextVersion.welcomeResources = newWelcomeResources;
}
/**
* Remove a welcome file from the given context.
*
* @param hostName The host where the given context can be found
* @param contextPath The path of the given context
* @param version The version of the given context
* @param welcomeFile The welcome file to remove
*/
public void removeWelcomeFile(String hostName, String contextPath, String version, String welcomeFile) {
hostName = renameWildcardHost(hostName);
ContextVersion contextVersion = findContextVersion(hostName, contextPath, version, false);
if (contextVersion == null || contextVersion.isPaused()) {
return;
}
int match = -1;
for (int i = 0; i < contextVersion.welcomeResources.length; i++) {
if (welcomeFile.equals(contextVersion.welcomeResources[i])) {
match = i;
break;
}
}
if (match > -1) {
int len = contextVersion.welcomeResources.length - 1;
String[] newWelcomeResources = new String[len];
System.arraycopy(contextVersion.welcomeResources, 0, newWelcomeResources, 0, match);
if (match < len) {
System.arraycopy(contextVersion.welcomeResources, match + 1, newWelcomeResources, match, len - match);
}
contextVersion.welcomeResources = newWelcomeResources;
}
}
/**
* Clear the welcome files for the given context.
*
* @param hostName The host where the context to be cleared can be found
* @param contextPath The path of the context to be cleared
* @param version The version of the context to be cleared
*/
public void clearWelcomeFiles(String hostName, String contextPath, String version) {
hostName = renameWildcardHost(hostName);
ContextVersion contextVersion = findContextVersion(hostName, contextPath, version, false);
if (contextVersion == null) {
return;
}
contextVersion.welcomeResources = new String[0];
}
/**
* Map the specified host name and URI, mutating the given mapping data.
*
* @param host Virtual host name
* @param uri URI
* @param version The version, if any, included in the request to be mapped
* @param mappingData This structure will contain the result of the mapping operation
*
* @throws IOException if the buffers are too small to hold the results of the mapping.
*/
public void map(MessageBytes host, MessageBytes uri, String version, MappingData mappingData) throws IOException {
if (host.isNull()) {
String defaultHostName = this.defaultHostName;
if (defaultHostName == null) {
return;
}
host.setChars(MessageBytes.EMPTY_CHAR_ARRAY, 0, 0);
host.getCharChunk().append(defaultHostName);
}
host.toChars();
uri.toChars();
internalMap(host.getCharChunk(), uri.getCharChunk(), version, mappingData);
}
/**
* Map the specified URI relative to the context, mutating the given mapping data.
*
* @param context The actual context
* @param uri URI
* @param mappingData This structure will contain the result of the mapping operation
*
* @throws IOException if the buffers are too small to hold the results of the mapping.
*/
public void map(Context context, MessageBytes uri, MappingData mappingData) throws IOException {
ContextVersion contextVersion = contextObjectToContextVersionMap.get(context);
uri.toChars();
CharChunk uricc = uri.getCharChunk();
uricc.setLimit(-1);
internalMapWrapper(contextVersion, uricc, mappingData);
}
// -------------------------------------------------------- Private Methods
/**
* Map the specified URI.
*
* @throws IOException If an error occurs while manipulating the URI during the mapping
*/
@SuppressWarnings("deprecation") // contextPath
private void internalMap(CharChunk host, CharChunk uri, String version, MappingData mappingData)
throws IOException {
if (mappingData.host != null) {
// The legacy code (dating down at least to Tomcat 4.1) just
// skipped all mapping work in this case. That behaviour has a risk
// of returning an inconsistent result.
// I do not see a valid use case for it.
throw new AssertionError();
}
// Virtual host mapping
MappedHost[] hosts = this.hosts;
MappedHost mappedHost = exactFindIgnoreCase(hosts, host);
if (mappedHost == null) {
// Note: Internally, the Mapper does not use the leading * on a
// wildcard host. This is to allow this shortcut.
int firstDot = host.indexOf('.');
if (firstDot > -1) {
int offset = host.getOffset();
try {
host.setOffset(firstDot + offset);
mappedHost = exactFindIgnoreCase(hosts, host);
} finally {
// Make absolutely sure this gets reset
host.setOffset(offset);
}
}
if (mappedHost == null) {
mappedHost = defaultHost;
if (mappedHost == null) {
return;
}
}
}
mappingData.host = mappedHost.object;
if (uri.isNull()) {
// Can't map context or wrapper without a uri
return;
}
uri.setLimit(-1);
// Context mapping
ContextList contextList = mappedHost.contextList;
MappedContext[] contexts = contextList.contexts;
int pos = find(contexts, uri);
if (pos == -1) {
return;
}
int lastSlash = -1;
int uriEnd = uri.getEnd();
int length = -1;
boolean found = false;
MappedContext context = null;
while (pos >= 0) {
context = contexts[pos];
if (uri.startsWith(context.name)) {
length = context.name.length();
if (uri.getLength() == length) {
found = true;
break;
} else if (uri.startsWithIgnoreCase("/", length)) {
found = true;
break;
}
}
if (lastSlash == -1) {
lastSlash = nthSlash(uri, contextList.nesting + 1);
} else {
lastSlash = lastSlash(uri);
}
uri.setEnd(lastSlash);
pos = find(contexts, uri);
}
uri.setEnd(uriEnd);
if (!found) {
if (contexts[0].name.equals("")) {
context = contexts[0];
} else {
context = null;
}
}
if (context == null) {
return;
}
mappingData.contextPath.setString(context.name);
ContextVersion contextVersion = null;
ContextVersion[] contextVersions = context.versions;
final int versionCount = contextVersions.length;
if (versionCount > 1) {
Context[] contextObjects = new Context[contextVersions.length];
for (int i = 0; i < contextObjects.length; i++) {
contextObjects[i] = contextVersions[i].object;
}
mappingData.contexts = contextObjects;
if (version != null) {
contextVersion = exactFind(contextVersions, version);
}
}
if (contextVersion == null) {
// Return the latest version
// The versions array is known to contain at least one element
contextVersion = contextVersions[versionCount - 1];
}
mappingData.context = contextVersion.object;
mappingData.contextSlashCount = contextVersion.slashCount;
// Wrapper mapping
if (!contextVersion.isPaused()) {
internalMapWrapper(contextVersion, uri, mappingData);
}
}
/**
* Wrapper mapping.
*
* @throws IOException if the buffers are too small to hold the results of the mapping.
*/
private void internalMapWrapper(ContextVersion contextVersion, CharChunk path, MappingData mappingData)
throws IOException {
int pathOffset = path.getOffset();
int pathEnd = path.getEnd();
boolean noServletPath = false;
int length = contextVersion.path.length();
if (length == (pathEnd - pathOffset)) {
noServletPath = true;
}
int servletPath = pathOffset + length;
path.setOffset(servletPath);
// Rule 1 -- Exact Match
MappedWrapper[] exactWrappers = contextVersion.exactWrappers;
internalMapExactWrapper(exactWrappers, path, mappingData);
// Rule 2 -- Prefix Match
boolean checkJspWelcomeFiles = false;
MappedWrapper[] wildcardWrappers = contextVersion.wildcardWrappers;
if (mappingData.wrapper == null) {
internalMapWildcardWrapper(wildcardWrappers, contextVersion.nesting, path, mappingData);
if (mappingData.wrapper != null && mappingData.jspWildCard) {
char[] buf = path.getBuffer();
if (buf[pathEnd - 1] == '/') {
/*
* Path ending in '/' was mapped to JSP servlet based on wildcard match (e.g., as specified in
* url-pattern of a jsp-property-group. Force the context's welcome files, which are interpreted as
* JSP files (since they match the url-pattern), to be considered. See Bugzilla 27664.
*/
mappingData.wrapper = null;
checkJspWelcomeFiles = true;
} else {
// See Bugzilla 27704
mappingData.wrapperPath.setChars(buf, path.getStart(), path.getLength());
mappingData.pathInfo.recycle();
}
}
}
if (mappingData.wrapper == null && noServletPath &&
contextVersion.object.getMapperContextRootRedirectEnabled()) {
// The path is empty, redirect to "/"
path.append('/');
pathEnd = path.getEnd();
mappingData.redirectPath.setChars(path.getBuffer(), pathOffset, pathEnd - pathOffset);
path.setEnd(pathEnd - 1);
return;
}
// Rule 3 -- Extension Match
MappedWrapper[] extensionWrappers = contextVersion.extensionWrappers;
if (mappingData.wrapper == null && !checkJspWelcomeFiles) {
internalMapExtensionWrapper(extensionWrappers, path, mappingData, true);
}
// Rule 4 -- Welcome resources processing for servlets
if (mappingData.wrapper == null) {
boolean checkWelcomeFiles = checkJspWelcomeFiles;
if (!checkWelcomeFiles) {
char[] buf = path.getBuffer();
checkWelcomeFiles = (buf[pathEnd - 1] == '/');
}
if (checkWelcomeFiles) {
for (int i = 0; (i < contextVersion.welcomeResources.length) && (mappingData.wrapper == null); i++) {
path.setOffset(pathOffset);
path.setEnd(pathEnd);
path.append(contextVersion.welcomeResources[i], 0, contextVersion.welcomeResources[i].length());
path.setOffset(servletPath);
// Rule 4a -- Welcome resources processing for exact macth
internalMapExactWrapper(exactWrappers, path, mappingData);
// Rule 4b -- Welcome resources processing for prefix match
if (mappingData.wrapper == null) {
internalMapWildcardWrapper(wildcardWrappers, contextVersion.nesting, path, mappingData);
}
// Rule 4c -- Welcome resources processing
// for physical folder
if (mappingData.wrapper == null && contextVersion.resources != null) {
String pathStr = path.toString();
WebResource file = contextVersion.resources.getResource(pathStr);
if (file != null && file.isFile()) {
internalMapExtensionWrapper(extensionWrappers, path, mappingData, true);
if (mappingData.wrapper == null && contextVersion.defaultWrapper != null) {
mappingData.wrapper = contextVersion.defaultWrapper.object;
mappingData.requestPath.setChars(path.getBuffer(), path.getStart(), path.getLength());
mappingData.wrapperPath.setChars(path.getBuffer(), path.getStart(), path.getLength());
mappingData.requestPath.setString(pathStr);
mappingData.wrapperPath.setString(pathStr);
}
}
}
}
path.setOffset(servletPath);
path.setEnd(pathEnd);
}
}
/*
* welcome file processing - take 2 Now that we have looked for welcome files with a physical backing, now look
* for an extension mapping listed but may not have a physical backing to it. This is for the case of index.jsf,
* index.do, etc. A watered down version of rule 4
*/
if (mappingData.wrapper == null) {
boolean checkWelcomeFiles = checkJspWelcomeFiles;
if (!checkWelcomeFiles) {
char[] buf = path.getBuffer();
checkWelcomeFiles = (buf[pathEnd - 1] == '/');
}
if (checkWelcomeFiles) {
for (int i = 0; (i < contextVersion.welcomeResources.length) && (mappingData.wrapper == null); i++) {
path.setOffset(pathOffset);
path.setEnd(pathEnd);
path.append(contextVersion.welcomeResources[i], 0, contextVersion.welcomeResources[i].length());
path.setOffset(servletPath);
internalMapExtensionWrapper(extensionWrappers, path, mappingData, false);
}
path.setOffset(servletPath);
path.setEnd(pathEnd);
}
}
// Rule 7 -- Default servlet
if (mappingData.wrapper == null && !checkJspWelcomeFiles) {
if (contextVersion.defaultWrapper != null) {
mappingData.wrapper = contextVersion.defaultWrapper.object;
mappingData.requestPath.setChars(path.getBuffer(), path.getStart(), path.getLength());
mappingData.wrapperPath.setChars(path.getBuffer(), path.getStart(), path.getLength());
mappingData.matchType = MappingMatch.DEFAULT;
}
// Redirection to a folder
char[] buf = path.getBuffer();
if (contextVersion.resources != null && buf[pathEnd - 1] != '/') {
String pathStr = path.toString();
// Note: Check redirect first to save unnecessary getResource()
// call. See BZ 62968.
if (contextVersion.object.getMapperDirectoryRedirectEnabled()) {
WebResource file;
// Handle context root
if (pathStr.length() == 0) {
file = contextVersion.resources.getResource("/");
} else {
file = contextVersion.resources.getResource(pathStr);
}
if (file != null && file.isDirectory()) {
// Note: this mutates the path: do not do any processing
// after this (since we set the redirectPath, there
// shouldn't be any)
path.setOffset(pathOffset);
path.append('/');
mappingData.redirectPath.setChars(path.getBuffer(), path.getStart(), path.getLength());
} else {
mappingData.requestPath.setString(pathStr);
mappingData.wrapperPath.setString(pathStr);
}
} else {
mappingData.requestPath.setString(pathStr);
mappingData.wrapperPath.setString(pathStr);
}
}
}
path.setOffset(pathOffset);
path.setEnd(pathEnd);
}
/**
* Exact mapping.
*/
@SuppressWarnings("deprecation") // contextPath
private void internalMapExactWrapper(MappedWrapper[] wrappers, CharChunk path, MappingData mappingData) {
MappedWrapper wrapper = exactFind(wrappers, path);
if (wrapper != null) {
mappingData.requestPath.setString(wrapper.name);
mappingData.wrapper = wrapper.object;
if (path.equals("/")) {
// Special handling for Context Root mapped servlet
mappingData.pathInfo.setString("/");
mappingData.wrapperPath.setString("");
// This seems wrong but it is what the spec says...
mappingData.contextPath.setString("");
mappingData.matchType = MappingMatch.CONTEXT_ROOT;
} else {
mappingData.wrapperPath.setString(wrapper.name);
mappingData.matchType = MappingMatch.EXACT;
}
}
}
/**
* Wildcard mapping.
*/
private void internalMapWildcardWrapper(MappedWrapper[] wrappers, int nesting, CharChunk path,
MappingData mappingData) {
int pathEnd = path.getEnd();
int lastSlash = -1;
int length = -1;
int pos = find(wrappers, path);
if (pos != -1) {
boolean found = false;
while (pos >= 0) {
if (path.startsWith(wrappers[pos].name)) {
length = wrappers[pos].name.length();
if (path.getLength() == length) {
found = true;
break;
} else if (path.startsWithIgnoreCase("/", length)) {
found = true;
break;
}
}
if (lastSlash == -1) {
lastSlash = nthSlash(path, nesting + 1);
} else {
lastSlash = lastSlash(path);
}
path.setEnd(lastSlash);
pos = find(wrappers, path);
}
path.setEnd(pathEnd);
if (found) {
mappingData.wrapperPath.setString(wrappers[pos].name);
if (path.getLength() > length) {
mappingData.pathInfo.setChars(path.getBuffer(), path.getOffset() + length,
path.getLength() - length);
}
mappingData.requestPath.setChars(path.getBuffer(), path.getOffset(), path.getLength());
mappingData.wrapper = wrappers[pos].object;
mappingData.jspWildCard = wrappers[pos].jspWildCard;
mappingData.matchType = MappingMatch.PATH;
}
}
}
/**
* Extension mappings.
*
* @param wrappers Set of wrappers to check for matches
* @param path Path to map
* @param mappingData Mapping data for result
* @param resourceExpected Is this mapping expecting to find a resource
*/
private void internalMapExtensionWrapper(MappedWrapper[] wrappers, CharChunk path, MappingData mappingData,
boolean resourceExpected) {
char[] buf = path.getBuffer();
int pathEnd = path.getEnd();
int servletPath = path.getOffset();
int slash = -1;
for (int i = pathEnd - 1; i >= servletPath; i--) {
if (buf[i] == '/') {
slash = i;
break;
}
}
if (slash >= 0) {
int period = -1;
for (int i = pathEnd - 1; i > slash; i--) {
if (buf[i] == '.') {
period = i;
break;
}
}
if (period >= 0) {
path.setOffset(period + 1);
path.setEnd(pathEnd);
MappedWrapper wrapper = exactFind(wrappers, path);
if (wrapper != null && (resourceExpected || !wrapper.resourceOnly)) {
mappingData.wrapperPath.setChars(buf, servletPath, pathEnd - servletPath);
mappingData.requestPath.setChars(buf, servletPath, pathEnd - servletPath);
mappingData.wrapper = wrapper.object;
mappingData.matchType = MappingMatch.EXTENSION;
}
path.setOffset(servletPath);
path.setEnd(pathEnd);
}
}
}
/**
* Find a map element given its name in a sorted array of map elements. This will return the index for the closest
* inferior or equal item in the given array.
*/
private static int find(MapElement[] map, CharChunk name) {
return find(map, name, name.getStart(), name.getEnd());
}
/**
* Find a map element given its name in a sorted array of map elements. This will return the index for the closest
* inferior or equal item in the given array.
*/
private static int find(MapElement[] map, CharChunk name, int start, int end) {
int a = 0;
int b = map.length - 1;
// Special cases: -1 and 0
if (b == -1) {
return -1;
}
if (compare(name, start, end, map[0].name) < 0) {
return -1;
}
if (b == 0) {
return 0;
}
int i = 0;
while (true) {
i = (b + a) >>> 1;
int result = compare(name, start, end, map[i].name);
if (result == 1) {
a = i;
} else if (result == 0) {
return i;
} else {
b = i;
}
if ((b - a) == 1) {
int result2 = compare(name, start, end, map[b].name);
if (result2 < 0) {
return a;
} else {
return b;
}
}
}
}
/**
* Find a map element given its name in a sorted array of map elements. This will return the index for the closest
* inferior or equal item in the given array.
*/
private static int findIgnoreCase(MapElement[] map, CharChunk name) {
return findIgnoreCase(map, name, name.getStart(), name.getEnd());
}
/**
* Find a map element given its name in a sorted array of map elements. This will return the index for the closest
* inferior or equal item in the given array.
*/
private static int findIgnoreCase(MapElement[] map, CharChunk name, int start, int end) {
int a = 0;
int b = map.length - 1;
// Special cases: -1 and 0
if (b == -1) {
return -1;
}
if (compareIgnoreCase(name, start, end, map[0].name) < 0) {
return -1;
}
if (b == 0) {
return 0;
}
int i = 0;
while (true) {
i = (b + a) >>> 1;
int result = compareIgnoreCase(name, start, end, map[i].name);
if (result == 1) {
a = i;
} else if (result == 0) {
return i;
} else {
b = i;
}
if ((b - a) == 1) {
int result2 = compareIgnoreCase(name, start, end, map[b].name);
if (result2 < 0) {
return a;
} else {
return b;
}
}
}
}
/**
* Find a map element given its name in a sorted array of map elements. This will return the index for the closest
* inferior or equal item in the given array.
*
* @see #exactFind(MapElement[], String)
*/
private static int find(MapElement[] map, String name) {
int a = 0;
int b = map.length - 1;
// Special cases: -1 and 0
if (b == -1) {
return -1;
}
if (name.compareTo(map[0].name) < 0) {
return -1;
}
if (b == 0) {
return 0;
}
int i = 0;
while (true) {
i = (b + a) >>> 1;
int result = name.compareTo(map[i].name);
if (result > 0) {
a = i;
} else if (result == 0) {
return i;
} else {
b = i;
}
if ((b - a) == 1) {
int result2 = name.compareTo(map[b].name);
if (result2 < 0) {
return a;
} else {
return b;
}
}
}
}
/**
* Find a map element given its name in a sorted array of map elements. This will return the element that you were
* searching for. Otherwise it will return null.
*
* @see #find(MapElement[], String)
*/
private static > E exactFind(E[] map, String name) {
int pos = find(map, name);
if (pos >= 0) {
E result = map[pos];
if (name.equals(result.name)) {
return result;
}
}
return null;
}
/**
* Find a map element given its name in a sorted array of map elements. This will return the element that you were
* searching for. Otherwise it will return null.
*/
private static > E exactFind(E[] map, CharChunk name) {
int pos = find(map, name);
if (pos >= 0) {
E result = map[pos];
if (name.equals(result.name)) {
return result;
}
}
return null;
}
/**
* Find a map element given its name in a sorted array of map elements. This will return the element that you were
* searching for. Otherwise it will return null.
*
* @see #findIgnoreCase(MapElement[], CharChunk)
*/
private static > E exactFindIgnoreCase(E[] map, CharChunk name) {
int pos = findIgnoreCase(map, name);
if (pos >= 0) {
E result = map[pos];
if (name.equalsIgnoreCase(result.name)) {
return result;
}
}
return null;
}
/**
* Compare given char chunk with String. Return -1, 0 or +1 if inferior, equal, or superior to the String.
*/
private static int compare(CharChunk name, int start, int end, String compareTo) {
int result = 0;
char[] c = name.getBuffer();
int compareLen = compareTo.length();
int len = compareLen;
if ((end - start) < len) {
len = end - start;
}
for (int i = 0; (i < len) && (result == 0); i++) {
char nameChar = c[i + start];
char compareToChar = compareTo.charAt(i);
if (nameChar > compareToChar) {
result = 1;
} else if (nameChar < compareToChar) {
result = -1;
}
}
if (result == 0) {
if (compareLen > (end - start)) {
result = -1;
} else if (compareLen < (end - start)) {
result = 1;
}
}
return result;
}
/**
* Compare given char chunk with String ignoring case. Return -1, 0 or +1 if inferior, equal, or superior to the
* String.
*/
private static int compareIgnoreCase(CharChunk name, int start, int end, String compareTo) {
int result = 0;
char[] c = name.getBuffer();
int compareLen = compareTo.length();
int len = compareLen;
if ((end - start) < len) {
len = end - start;
}
for (int i = 0; (i < len) && (result == 0); i++) {
int nameLower = Ascii.toLower(c[i + start]);
int compareLower = Ascii.toLower(compareTo.charAt(i));
if (nameLower > compareLower) {
result = 1;
} else if (nameLower < compareLower) {
result = -1;
}
}
if (result == 0) {
if (compareLen > (end - start)) {
result = -1;
} else if (compareLen < (end - start)) {
result = 1;
}
}
return result;
}
/**
* Find the position of the last slash in the given char chunk.
*/
private static int lastSlash(CharChunk name) {
char[] c = name.getBuffer();
int end = name.getEnd();
int start = name.getStart();
int pos = end;
while (pos > start) {
if (c[--pos] == '/') {
break;
}
}
return pos;
}
/**
* Find the position of the nth slash, in the given char chunk.
*/
private static int nthSlash(CharChunk name, int n) {
char[] c = name.getBuffer();
int end = name.getEnd();
int start = name.getStart();
int pos = start;
int count = 0;
while (pos < end) {
if ((c[pos++] == '/') && ((++count) == n)) {
pos--;
break;
}
}
return pos;
}
/**
* Return the slash count in a given string.
*/
private static int slashCount(String name) {
int pos = -1;
int count = 0;
while ((pos = name.indexOf('/', pos + 1)) != -1) {
count++;
}
return count;
}
/**
* Insert into the right place in a sorted MapElement array, and prevent duplicates.
*/
private static boolean insertMap(MapElement[] oldMap, MapElement[] newMap, MapElement newElement) {
int pos = find(oldMap, newElement.name);
if ((pos != -1) && (newElement.name.equals(oldMap[pos].name))) {
return false;
}
System.arraycopy(oldMap, 0, newMap, 0, pos + 1);
newMap[pos + 1] = newElement;
System.arraycopy(oldMap, pos + 1, newMap, pos + 2, oldMap.length - pos - 1);
return true;
}
/**
* Insert into the right place in a sorted MapElement array.
*/
private static boolean removeMap(MapElement[] oldMap, MapElement[] newMap, String name) {
int pos = find(oldMap, name);
if ((pos != -1) && (name.equals(oldMap[pos].name))) {
System.arraycopy(oldMap, 0, newMap, 0, pos);
System.arraycopy(oldMap, pos + 1, newMap, pos, oldMap.length - pos - 1);
return true;
}
return false;
}
/*
* To simplify the mapping process, wild card hosts take the form ".apache.org" rather than "*.apache.org"
* internally. However, for ease of use the external form remains "*.apache.org". Any host name passed into this
* class needs to be passed through this method to rename and wild card host names from the external to internal
* form.
*/
private static String renameWildcardHost(String hostName) {
if (hostName != null && hostName.startsWith("*.")) {
return hostName.substring(1);
} else {
return hostName;
}
}
// ------------------------------------------------- MapElement Inner Class
protected abstract static class MapElement {
public final String name;
public final T object;
public MapElement(String name, T object) {
this.name = name;
this.object = object;
}
}
// ------------------------------------------------------- Host Inner Class
protected static final class MappedHost extends MapElement {
public volatile ContextList contextList;
/**
* Link to the "real" MappedHost, shared by all aliases.
*/
private final MappedHost realHost;
/**
* Links to all registered aliases, for easy enumeration. This field is available only in the "real" MappedHost.
* In an alias this field is null.
*/
private final List aliases;
/**
* Constructor used for the primary Host
*
* @param name The name of the virtual host
* @param host The host
*/
public MappedHost(String name, Host host) {
super(name, host);
realHost = this;
contextList = new ContextList();
aliases = new CopyOnWriteArrayList<>();
}
/**
* Constructor used for an Alias
*
* @param alias The alias of the virtual host
* @param realHost The host the alias points to
*/
public MappedHost(String alias, MappedHost realHost) {
super(alias, realHost.object);
this.realHost = realHost;
this.contextList = realHost.contextList;
this.aliases = null;
}
public boolean isAlias() {
return realHost != this;
}
public MappedHost getRealHost() {
return realHost;
}
public String getRealHostName() {
return realHost.name;
}
public Collection getAliases() {
return aliases;
}
public void addAlias(MappedHost alias) {
aliases.add(alias);
}
public void addAliases(Collection c) {
aliases.addAll(c);
}
public void removeAlias(MappedHost alias) {
aliases.remove(alias);
}
}
// ------------------------------------------------ ContextList Inner Class
protected static final class ContextList {
public final MappedContext[] contexts;
public final int nesting;
public ContextList() {
this(new MappedContext[0], 0);
}
private ContextList(MappedContext[] contexts, int nesting) {
this.contexts = contexts;
this.nesting = nesting;
}
public ContextList addContext(MappedContext mappedContext, int slashCount) {
MappedContext[] newContexts = new MappedContext[contexts.length + 1];
if (insertMap(contexts, newContexts, mappedContext)) {
return new ContextList(newContexts, Math.max(nesting, slashCount));
}
return null;
}
public ContextList removeContext(String path) {
MappedContext[] newContexts = new MappedContext[contexts.length - 1];
if (removeMap(contexts, newContexts, path)) {
int newNesting = 0;
for (MappedContext context : newContexts) {
newNesting = Math.max(newNesting, slashCount(context.name));
}
return new ContextList(newContexts, newNesting);
}
return null;
}
}
// ---------------------------------------------------- Context Inner Class
protected static final class MappedContext extends MapElement {
public volatile ContextVersion[] versions;
public MappedContext(String name, ContextVersion firstVersion) {
super(name, null);
this.versions = new ContextVersion[] { firstVersion };
}
}
protected static final class ContextVersion extends MapElement {
public final String path;
public final int slashCount;
public final WebResourceRoot resources;
public String[] welcomeResources;
public MappedWrapper defaultWrapper = null;
public MappedWrapper[] exactWrappers = new MappedWrapper[0];
public MappedWrapper[] wildcardWrappers = new MappedWrapper[0];
public MappedWrapper[] extensionWrappers = new MappedWrapper[0];
public int nesting = 0;
private volatile boolean paused;
public ContextVersion(String version, String path, int slashCount, Context context, WebResourceRoot resources,
String[] welcomeResources) {
super(version, context);
this.path = path;
this.slashCount = slashCount;
this.resources = resources;
this.welcomeResources = welcomeResources;
}
public boolean isPaused() {
return paused;
}
public void markPaused() {
paused = true;
}
}
// ---------------------------------------------------- Wrapper Inner Class
protected static class MappedWrapper extends MapElement {
public final boolean jspWildCard;
public final boolean resourceOnly;
public MappedWrapper(String name, Wrapper wrapper, boolean jspWildCard, boolean resourceOnly) {
super(name, wrapper);
this.jspWildCard = jspWildCard;
this.resourceOnly = resourceOnly;
}
}
}
