/**
* 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.hadoop.lib.wsrs;
import com.sun.jersey.api.core.HttpContext;
import com.sun.jersey.core.spi.component.ComponentContext;
import com.sun.jersey.core.spi.component.ComponentScope;
import com.sun.jersey.server.impl.inject.AbstractHttpContextInjectable;
import com.sun.jersey.spi.inject.Injectable;
import com.sun.jersey.spi.inject.InjectableProvider;
import org.apache.hadoop.classification.InterfaceAudience;
import org.slf4j.MDC;
import javax.ws.rs.core.Context;
import javax.ws.rs.ext.Provider;
import java.lang.reflect.Type;
import java.security.Principal;
import java.text.MessageFormat;
import java.util.regex.Pattern;
@Provider
@InterfaceAudience.Private
public class UserProvider extends AbstractHttpContextInjectable<Principal> implements
InjectableProvider<Context, Type> {
public static final String USER_NAME_PARAM = "user.name";
public static final String USER_PATTERN_KEY
= "httpfs.user.provider.user.pattern";
public static final String USER_PATTERN_DEFAULT
= "^[A-Za-z_][A-Za-z0-9._-]*[$]?$";
private static Pattern userPattern = Pattern.compile(USER_PATTERN_DEFAULT);
public static void setUserPattern(String pattern) {
userPattern = Pattern.compile(pattern);
}
public static Pattern getUserPattern() {
return userPattern;
}
static class UserParam extends StringParam {
public UserParam(String user) {
super(USER_NAME_PARAM, user, getUserPattern());
}
@Override
public String parseParam(String str) {
if (str != null) {
int len = str.length();
if (len < 1) {
throw new IllegalArgumentException(MessageFormat.format(
"Parameter [{0}], it's length must be at least 1", getName()));
}
}
return super.parseParam(str);
}
}
@Override
public Principal getValue(HttpContext httpContext) {
Principal principal = httpContext.getRequest().getUserPrincipal();
if (principal == null) {
final String user = httpContext.getRequest().getQueryParameters().getFirst(USER_NAME_PARAM);
if (user != null) {
principal = new Principal() {
@Override
public String getName() {
return new UserParam(user).value();
}
};
}
}
if (principal != null) {
MDC.put("user", principal.getName());
}
return principal;
}
@Override
public ComponentScope getScope() {
return ComponentScope.PerRequest;
}
@Override
public Injectable getInjectable(ComponentContext componentContext, Context context, Type type) {
return (type.equals(Principal.class)) ? this : null;
}
}