package com.panzhihua.zuul.filters;
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import java.util.*;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletRequestWrapper;
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/**
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* @program: springcloud_k8s_panzhihuazhihuishequ
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* @description: 组装request参数
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* @author: huang.hongfa weixin hhf9596 qq 959656820
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* @create: 2020-11-26 10:32
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**/
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public class SafeboxRequestWrapper extends HttpServletRequestWrapper {
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private Map<String, String> headerMap = new HashMap<String, String>();
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private Map<String, String[]> params = new HashMap<String, String[]>();
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public SafeboxRequestWrapper(HttpServletRequest request) {
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super(request);
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// 将参数表，赋予给当前的Map以便于持有request中的参数
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this.params.putAll(request.getParameterMap());
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}
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public void addHeader(String name, String value) {
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headerMap.put(name, value);
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}
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@Override
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public String getHeader(String name) {
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String headerValue = super.getHeader(name);
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if (headerMap.containsKey(name)) {
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headerValue = headerMap.get(name);
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}
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return headerValue;
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}
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@Override
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public Enumeration<String> getHeaderNames() {
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List<String> names = Collections.list(super.getHeaderNames());
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for (String name : headerMap.keySet()) {
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names.add(name);
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}
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return Collections.enumeration(names);
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}
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@Override
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public Enumeration<String> getHeaders(String name) {
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List<String> values = Collections.list(super.getHeaders(name));
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if (headerMap.containsKey(name)) {
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values.add(headerMap.get(name));
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}
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return Collections.enumeration(values);
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}
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@Override
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public String getParameter(String name) {// 重写getParameter，代表参数从当前类中的map获取
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String[] values = params.get(name);
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if (values == null || values.length == 0) {
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return null;
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}
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return values[0];
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}
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@Override
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public String[] getParameterValues(String name) {// 同上
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return params.get(name);
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}
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}
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