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SessionMapper.java
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package act.util;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2017 ActFramework
* %%
* Licensed 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.
* #L%
*/
import act.app.ActionContext;
import org.osgl.http.H;
import org.osgl.util.E;
import org.osgl.util.S;
/**
* Map the {@link org.osgl.http.H.Session} and {@link org.osgl.http.H.Cookie} to/from
* {@link org.osgl.http.H.Response}/{@link org.osgl.http.H.Request}
*/
public interface SessionMapper {
void serializeSession(H.Cookie sessionCookie, ActionContext context);
void serializeFlash(H.Cookie flashCookie, ActionContext context);
String deserializeSession(ActionContext context);
String deserializeFlash(ActionContext context);
/**
* The default session mapper, do the mapping by adding/reading cookie information
* directly to response/request
*/
class DefaultSessionMapper implements SessionMapper {
public static SessionMapper INSTANCE = new DefaultSessionMapper();
@Override
public void serializeSession(H.Cookie sessionCookie, ActionContext context) {
context.resp().addCookie(sessionCookie);
}
@Override
public void serializeFlash(H.Cookie flashCookie, ActionContext context) {
context.resp().addCookie(flashCookie);
}
@Override
public String deserializeSession(ActionContext context) {
H.Cookie sessionCookie = context.req().cookie(context.config().sessionCookieName());
return null == sessionCookie ? null : sessionCookie.value();
}
@Override
public String deserializeFlash(ActionContext context) {
H.Cookie flashCookie = context.req().cookie(context.config().flashCookieName());
return null == flashCookie ? null : flashCookie.value();
}
public static SessionMapper wrap(final SessionMapper theMapper) {
if (null == theMapper) {
return INSTANCE;
}
if (DefaultSessionMapper.class.equals(theMapper.getClass())) {
return theMapper;
}
return new SessionMapper() {
@Override
public void serializeSession(H.Cookie sessionCookie, ActionContext context) {
theMapper.serializeSession(sessionCookie, context);
INSTANCE.serializeSession(sessionCookie, context);
}
@Override
public void serializeFlash(H.Cookie flashCookie, ActionContext context) {
theMapper.serializeFlash(flashCookie, context);
INSTANCE.serializeFlash(flashCookie, context);
}
@Override
public String deserializeSession(ActionContext context) {
String s = theMapper.deserializeSession(context);
return S.blank(s) ? INSTANCE.deserializeSession(context) : s;
}
@Override
public String deserializeFlash(ActionContext context) {
String s = theMapper.deserializeFlash(context);
return S.blank(s) ? INSTANCE.deserializeFlash(context) : s;
}
};
}
}
/**
* The header session mapper do mapping through write/read the header of response/request
*/
class HeaderSessionMapper implements SessionMapper {
public static final String DEF_HEADER_PREFIX = "X-Act-";
private String headerPrefix;
public HeaderSessionMapper(String headerPrefix) {
E.illegalArgumentIf(S.blank(headerPrefix));
this.headerPrefix = headerPrefix;
}
public HeaderSessionMapper() {
this(DEF_HEADER_PREFIX);
}
@Override
public void serializeSession(H.Cookie sessionCookie, ActionContext context) {
context.resp().header(sessionHeaderName(), sessionCookie.value());
}
@Override
public void serializeFlash(H.Cookie flashCookie, ActionContext context) {
context.resp().header(flashHeaderName(), flashCookie.value());
}
@Override
public String deserializeSession(ActionContext context) {
return context.req().header(sessionHeaderName());
}
@Override
public String deserializeFlash(ActionContext context) {
return context.req().header(flashHeaderName());
}
private String sessionHeaderName() {
return headerPrefix + "Session";
}
private String flashHeaderName() {
return headerPrefix + "Flash";
}
}
}