flink 获取上传的Jar源码

package org.apache.flink.runtime.webmonitor.handlers;

/**
 * Handles .jar file uploads.
 */
public class JarUploadHandler extends
      AbstractRestHandler<RestfulGateway, EmptyRequestBody, JarUploadResponseBody, EmptyMessageParameters> {

package org.apache.flink.runtime.rest;

public abstract class AbstractHandler<T extends RestfulGateway, R extends RequestBody, M extends MessageParameters> extends RedirectHandler<T> {
   protected final Logger log = LoggerFactory.getLogger(getClass());
   protected static final ObjectMapper MAPPER = RestMapperUtils.getStrictObjectMapper();
   private final UntypedResponseMessageHeaders<R, M> untypedResponseMessageHeaders;
   protected AbstractHandler(
         @Nonnull CompletableFuture<String> localAddressFuture,
         @Nonnull GatewayRetriever<? extends T> leaderRetriever,
         @Nonnull Time timeout,
         @Nonnull Map<String, String> responseHeaders,
         @Nonnull UntypedResponseMessageHeaders<R, M> untypedResponseMessageHeaders) {
      super(localAddressFuture, leaderRetriever, timeout, responseHeaders);

      this.untypedResponseMessageHeaders = Preconditions.checkNotNull(untypedResponseMessageHeaders);
   }

   @Override
   protected void respondAsLeader(ChannelHandlerContext ctx, RoutedRequest routedRequest, T gateway) {
      HttpRequest httpRequest = routedRequest.getRequest();
      if (log.isTraceEnabled()) {
         log.trace("Received request " + httpRequest.uri() + '.');
      }

      FileUploads uploadedFiles = null;
      try {
         if (!(httpRequest instanceof FullHttpRequest)) {
            // The RestServerEndpoint defines a HttpObjectAggregator in the pipeline that always returns
            // FullHttpRequests.
            log.error("Implementation error: Received a request that wasn't a FullHttpRequest.");
            throw new RestHandlerException("Bad request received.", HttpResponseStatus.BAD_REQUEST);
         }

         final ByteBuf msgContent = ((FullHttpRequest) httpRequest).content();

         uploadedFiles = FileUploadHandler.getMultipartFileUploads(ctx);