我正在处理在数据库中记录 api 请求和响应的任务。我需要 Autowiring spring bean 来访问数据库,但我们无法在过滤器内 Autowiring spring bean。
问题是我们只能使用 HttpServletResponseWrapper 在过滤器中多次读取响应。
Is there any way to read response multiple times in spring interceptor?
这是我使用过滤器的代码。它可以检索所有信息,但无法在 ApiActivityManager 中 Autowiring bean 以将数据插入数据库。
如果我在拦截器中读取响应一次,则 Controller 响应为空。
public class ApiActivityInterceptor implements Filter {
ApiActivityManager apiActivityManager = new ApiActivityManager();
@Override public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
MyRequestWrapper requestWrapper = new MyRequestWrapper((HttpServletRequest)request);
MyResponseWrapper responseWrapper = new MyResponseWrapper((HttpServletResponse)response);
InputStream inputStream = requestWrapper.getInputStream();
StringBuilder stringBuilder = new StringBuilder();
BufferedReader bufferedReader = null;
if (inputStream != null) {
bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
char[] charBuffer = new char[128];
int bytesRead = -1;
while ((bytesRead = bufferedReader.read(charBuffer)) > 0) {
stringBuilder.append(charBuffer, 0, bytesRead);
}
} else {
stringBuilder.append("");
}
String requestText = stringBuilder.toString();
log.info(requestText);
chain.doFilter((ServletRequest)requestWrapper,(ServletResponse)responseWrapper);
String responseText = new String(responseWrapper.getCopy(),responseWrapper.getCharacterEncoding());
log.info(responseText);
//for log details in database
activityLogDetails.setActivityLog(requestText,responseText);
}
@Override public void destroy() {
}
}
谢谢
最佳答案
要在过滤器类中 Autowiring spring beans,
- 首先在过滤器类中添加
@Component
注解。 - 注册过滤器,过滤器名称为bean名称,过滤器类为org.springframework.web.filter.DelegatingFilterProxy
所以我的解决方案看起来像,
ApiActivityFilter.java
@Component("apiActivityFilter")
public class ApiActivityFilter implements Filter {
@Autowired
ApiActivityManager apiActivityManager;
@Override public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
MyRequestWrapper requestWrapper = new MyRequestWrapper((HttpServletRequest)request);
MyResponseWrapper responseWrapper = new MyResponseWrapper((HttpServletResponse)response);
InputStream inputStream = requestWrapper.getInputStream();
StringBuilder stringBuilder = new StringBuilder();
BufferedReader bufferedReader = null;
if (inputStream != null) {
bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
char[] charBuffer = new char[128];
int bytesRead = -1;
while ((bytesRead = bufferedReader.read(charBuffer)) > 0) {
stringBuilder.append(charBuffer, 0, bytesRead);
}
} else {
stringBuilder.append("");
}
String requestText = stringBuilder.toString();
log.info(requestText);
chain.doFilter((ServletRequest)requestWrapper,(ServletResponse)responseWrapper);
String responseText = new String(responseWrapper.getCopy(),responseWrapper.getCharacterEncoding());
log.info(responseText);
//for log details in database
apiActivityManager.logApiActivity(activityLog);//activityLog Object to be logged
}
@Override public void destroy() {
}
}
使用Java配置注册过滤器
FilterRegistration.Dynamic apiActivityFilter = servletContext.addFilter("apiActivityFilter", DelegatingFilterProxy.class);
apiActivityFilter.addMappingForUrlPatterns(null, true, "/api/*");
使用XML配置注册过滤器
<filter>
<filter-name>apiActivityFilter</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>
<filter-mapping>
<filter-name>apiActivityFilter</filter-name>
<url-pattern>/api/*</url-pattern>
</filter-mapping>
关于java - 如何在Spring拦截器中读取httpservletresponse?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/26737981/