Question

我想记录整个请求和响应正文。出于日志记录的目的，jax-rs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. 
    }
}

在响应过滤器中我无法获取请求正文。在请求过滤器中我得到它但是：

我无法在请求正文和响应正文之间建立链接。
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.在请求和响应使用之间建立连接：

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

要将流返回到主代码，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));

修改

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());

使用JAX-RS resteasy和ContainerRequestFilter / ContainerResponseFilter

1 个答案: