ContentLengthWriterInterceptor.java 文件源码

/**
 * {@inheritDoc}
 */
@Override
public void aroundWriteTo(WriterInterceptorContext context) throws IOException, WebApplicationException {
    if (!context.getHeaders().containsKey(HttpHeaders.CONTENT_LENGTH)) {
        Object entity = context.getEntity();
        StreamingProcess<Object> process = MessageHelper.getStreamingProcess(entity, manager);

        if (process != null) {
            long length = process.length(entity);

            if (length != -1)
                context.getHeaders().putSingle(HttpHeaders.CONTENT_LENGTH, length);
        }
    }

    context.proceed();
}