使用JAX-RS resteasy和ContainerRequestFilter / ContainerResponseFilter记录请求

Question

我想记录整个请求和响应正文。出于记录目的，jax-rs具有过滤器。

public class ResponseLoggingFilter implements ContainerRequestFilter, ContainerResponseFilter {
    public void filter(ContainerRequestContext requestContext, ContainerResponseContext responseContext) throws IOException { 
        System.out.println(IOUtils.toString(requestContext.getEntityStream(), "UTF-8")); // It's always empty string
        System.out.println(responseContext.getEntity().toString());  // Here is actual response. It's OK
    }
    public void filter(ContainerRequestContext requestContext) throws IOException { 
        System.out.println(IOUtils.toString(requestContext.getEntityStream(), "UTF-8")); // Here is actual response. But this request is empty in main code. 
    }
}

在响应过滤器我不能得到请求正文。在请求过滤器中我得到它但是：

• 我无法获得请求正文和响应正文之间的链接。
• 一旦从流设置请求正文设置此流为空，我无法在我的主代码中获取它。

我正在使用resteasy 3.0.6。

Answer 1

1.请求和响应使用之间有联系：

@Override
    public void filter(ContainerRequestContext paramContainerRequestContext, ContainerResponseContext paramContainerResponseContext) throws IOException {
        ...     
    }

2. 要将流返回到Main代码，请使用setEntityStream将其写回：

   ByteArrayOutputStream out = new ByteArrayOutputStream();
   InputStream in = requestContext.getEntityStream();
   
   final StringBuilder b = new StringBuilder();
   try {
       ReaderWriter.writeTo(in, out);
   
       byte[] requestEntity = out.toByteArray();
       ...
       requestContext.setEntityStream(new ByteArrayInputStream(requestEntity));

编辑

使用@Moritz Becker添加来自ClientLoggingFilter的请求正文和响应正文之间链接的注释示例：

@Override
    public void filter(final ClientRequestContext requestContext, final ClientResponseContext responseContext)
            throws IOException {
        ...
        final Object requestId = requestContext.getProperty(LOGGING_ID_PROPERTY);
        final long id = requestId != null ? (Long) requestId : _id.incrementAndGet();

        final StringBuilder b = new StringBuilder();

        printResponseLine(b, "Client response received", id, responseContext.getStatus());
        printPrefixedHeaders(b, id, RESPONSE_PREFIX, responseContext.getHeaders());