com.alibaba.nacos.naming.web.OverrideParameterRequestWrapper Maven / Gradle / Ivy
/*
* Copyright 1999-2018 Alibaba Group Holding Ltd.
*
* 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.
*/
package com.alibaba.nacos.naming.web;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.util.HashMap;
import java.util.Map;
/**
* A request wrapper to override the parameters.
*
* Referenced article is https://blog.csdn.net/xieyuooo/article/details/8447301
*
* @author nkorange
* @since 0.8.0
*/
public class OverrideParameterRequestWrapper extends HttpServletRequestWrapper {
private Map params = new HashMap<>();
/**
* Constructs a request object wrapping the given request.
*
* @param request The request to wrap
* @throws IllegalArgumentException if the request is null
*/
public OverrideParameterRequestWrapper(HttpServletRequest request) {
super(request);
this.params.putAll(request.getParameterMap());
}
public static OverrideParameterRequestWrapper buildRequest(HttpServletRequest request) {
return new OverrideParameterRequestWrapper(request);
}
public static OverrideParameterRequestWrapper buildRequest(HttpServletRequest request, String name, String value) {
OverrideParameterRequestWrapper requestWrapper = new OverrideParameterRequestWrapper(request);
requestWrapper.addParameter(name, value);
return requestWrapper;
}
public static OverrideParameterRequestWrapper buildRequest(HttpServletRequest request, Map appendParameters) {
OverrideParameterRequestWrapper requestWrapper = new OverrideParameterRequestWrapper(request);
requestWrapper.params.putAll(appendParameters);
return requestWrapper;
}
@Override
public String getParameter(String name) {
String[] values = params.get(name);
if (values == null || values.length == 0) {
return null;
}
return values[0];
}
@Override
public Map getParameterMap() {
return params;
}
@Override
public String[] getParameterValues(String name) {
return params.get(name);
}
public void addParameter(String name, String value) {
if (value != null) {
params.put(name, new String[]{value});
}
}
}