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[英]How to convert HttpServletRequest to Java Object in HandlerInterceptorAdapter
[英]How to add HttpServletRequest headers in HandlerInterceptorAdapter?
我正在嘗試在我的請求中添加一個 Authorization 標頭,作為我們切換環境時的臨時解決方法。 我試圖在擴展 HandlerInterceptorAdapter 的攔截器中處理它。
我使用了這里創建的 MutableHttpServletRequest 類,以便能夠將標頭添加到請求中,但似乎沒有任何方法可以實際修改攔截器中返回的請求。 有什么想法嗎?
編輯:或者我必須在過濾器中執行此操作嗎?
HttpServletRequest 類型對象是只讀的,為此您應該:
-> 創建一個擴展 HttpServletRequestWrapper 的類(添加一些行為,裝飾器模式)
final public class MutableHttpServletRequest extends HttpServletRequestWrapper {
private final Map<String, String> customHeaders;
public MutableHttpServletRequest(HttpServletRequest request){
super(request);
this.customHeaders = new HashMap<String, String>();
}
public void putHeader(String name, String value){
this.customHeaders.put(name, value);
}
public String getHeader(String name) {
String headerValue = customHeaders.get(name);
if (headerValue != null){
return headerValue;
}
return ((HttpServletRequest) getRequest()).getHeader(name);
}
public Enumeration<String> getHeaderNames() {
Set<String> set = new HashSet<String>(customHeaders.keySet());
@SuppressWarnings("unchecked")
Enumeration<String> e = ((HttpServletRequest) getRequest()).getHeaderNames();
while (e.hasMoreElements()) {
String n = e.nextElement();
set.add(n);
}
return Collections.enumeration(set);
}
}
-> 創建您的過濾器類
public class CustomGatewayFilter implements Filter {
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
MutableHttpServletRequest mutableRequest = new MutableHttpServletRequest(req);
mutableRequest.putHeader("referer", "custom value");
chain.doFilter(mutableRequest, response);
}
}
-> 並在您的配置類中添加
.and().addFilterAfter(new CustomGatewayFilter(), ConcurrentSessionFilter.class)
public class YourInterceptor extends HandlerInterceptorAdapter {
@Override
public boolean preHandle(HttpServletRequest request,
HttpServletResponse response, Object handler) throws Exception {
SomeModel model = new SomeModel();
request.setAttribute("someValue", model );
request.addHeader("xxx","asecret");
return true;
}
@Override
public void postHandle(HttpServletRequest request,
HttpServletResponse response, Object handler,
ModelAndView modelAndView) throws Exception {
//...
response.addHeader("dummy-header, "dummy-value");
}
@Override
public void afterCompletion(HttpServletRequest request,
HttpServletResponse response, Object handler, Exception ex)
throws Exception {
SomeModel model = (Long) request.getAttribute("someValue");
}
}
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