package com.qianwen.smartman.common.request;

import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;

public class HeaderHttpServletRequestWrapper extends HttpServletRequestWrapper {
    private Map<String, String> headers;

    public HeaderHttpServletRequestWrapper(HttpServletRequest request) {
        super(request);
        this.headers = new HashMap<>();
    }

    public void addHeader(String name, String value) {
        this.headers.put(name, value);
    }

    public String getHeader(String name) {
        String value = super.getHeader(name);
        if (this.headers.containsKey(name)) {
            value = this.headers.get(name);
        }
        return value;
    }

    public Enumeration<String> getHeaderNames() {
        List<String> names = Collections.list(super.getHeaderNames());
        names.addAll(this.headers.keySet());
        return Collections.enumeration(names);
    }

    public Enumeration<String> getHeaders(String name) {
        List<String> list = Collections.list(super.getHeaders(name));
        if (this.headers.containsKey(name)) {
            list.add(this.headers.get(name));
        }
        return Collections.enumeration(list);
    }
}