我正在开发带有弹簧安全性的过滤器, OncePerRequestFilter
类,并且必须在其余服务中更新参数。标题由注释@RequestHeader
输入。
我尝试使用以下类别从过滤器中更新参数:
public class HeaderMapRequestWrapper extends HttpServletRequestWrapper {
/**
* construct a wrapper for this request
*
* @param request
*/
public HeaderMapRequestWrapper(HttpServletRequest request) {
super(request);
}
private Map<String, String> headerMap = new HashMap<String, String>();
/**
* add a header with given name and value
*
* @param name
* @param value
*/
public void addHeader(String name, String value) {
headerMap.put(name, value);
}
public void removeteHeader(String name){
headerMap.remove(name);
}
@Override
public String getHeader(String name) {
String headerValue = super.getHeader(name);
if (headerMap.containsKey(name)) {
headerValue = headerMap.get(name);
}
return headerValue;
}
/**
* get the Header names
*/
@Override
public Enumeration<String> getHeaderNames() {
List<String> names = Collections.list(super.getHeaderNames());
for (String name : headerMap.keySet()) {
names.add(name);
}
return Collections.enumeration(names);
}
@Override
public Enumeration<String> getHeaders(String name) {
List<String> values = Collections.list(super.getHeaders(name));
if (headerMap.containsKey(name)) {
values.add(headerMap.get(name));
}
return Collections.enumeration(values);
}
}
和使用方法.addHeader("parameter", "New value")
,但是当我在方法中读取参数时,它没有更改,但是如果从.getheader('parameter')方法从 httpservletrequest 类中读取,我已经在相同的方法类中不截至。更改已完成,但在方法参数中未显示。
该方法是:
@Autowired
HttpServletRequest a;
//Annotations @GetMapping......
public void method (@RequestHeader(value="Parameter") String parameter){
System.out.print(parameter); //Parameter did not change
system.out.print(a.getHeader("parameter")); //Parameter changed.
}
有人知道如何从过滤器中更改操作参数吗?或其他方式....
我不确定您在做什么错,但是当我尝试使用设置时,它似乎有效。请查看以下代码。
/**
* username: test, password: test
* Added Header: param
* REST URL: http://localhost:8080/hello
*/
package com.test;
import java.io.IOException;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.filter.OncePerRequestFilter;
@SpringBootApplication
public class TestRequestWrapperApplication {
public static void main(String[] args) {
SpringApplication.run(TestRequestWrapperApplication.class, args);
}
}
@Component
class RequestWrapperFilter extends OncePerRequestFilter {
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
throws ServletException, IOException {
HeaderMapRequestWrapper wrappedRequest = new HeaderMapRequestWrapper((HttpServletRequest)request);
wrappedRequest.addHeader("param", "Hello World!");
filterChain.doFilter(wrappedRequest, response);
}
}
@RestController
class TestRest {
@GetMapping("hello")
public String hello(@RequestHeader("param") String param) {
return "param: " + param;
}
}
@Configuration
class SecurityConfig extends WebSecurityConfigurerAdapter {
@Override
protected void configure(HttpSecurity http) throws Exception {
super.configure(http);
}
@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
auth.inMemoryAuthentication().withUser("test").authorities("test").password("test");
}
}
class HeaderMapRequestWrapper extends HttpServletRequestWrapper {
public HeaderMapRequestWrapper(HttpServletRequest request) {
super(request);
}
private Map<String, String> headerMap = new HashMap<String, String>();
public void addHeader(String name, String value) {
headerMap.put(name, value);
}
public void removeteHeader(String name) {
headerMap.remove(name);
}
@Override
public String getHeader(String name) {
String headerValue = super.getHeader(name);
if (headerMap.containsKey(name)) {
headerValue = headerMap.get(name);
}
return headerValue;
}
@Override
public Enumeration<String> getHeaderNames() {
List<String> names = Collections.list(super.getHeaderNames());
for (String name : headerMap.keySet()) {
names.add(name);
}
return Collections.enumeration(names);
}
@Override
public Enumeration<String> getHeaders(String name) {
List<String> values = Collections.list(super.getHeaders(name));
if (headerMap.containsKey(name)) {
values.add(headerMap.get(name));
}
return Collections.enumeration(values);
}
}