| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.servicecomb.foundation.vertx.stream; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.util.concurrent.CompletableFuture; |
| |
| import javax.servlet.http.Part; |
| |
| import org.apache.commons.io.IOUtils; |
| import org.apache.servicecomb.foundation.vertx.http.DownloadUtils; |
| import org.apache.servicecomb.foundation.vertx.http.ReadStreamPart; |
| |
| import io.vertx.core.Context; |
| import io.vertx.core.Handler; |
| import io.vertx.core.buffer.Buffer; |
| import io.vertx.core.streams.ReadStream; |
| import io.vertx.core.streams.WriteStream; |
| |
| public class PumpFromPart { |
| private Context context; |
| |
| private Part part; |
| |
| public PumpFromPart(Context context, Part part) { |
| this.context = context; |
| this.part = part; |
| } |
| |
| private CompletableFuture<ReadStream<Buffer>> prepareReadStream() { |
| CompletableFuture<ReadStream<Buffer>> future = new CompletableFuture<>(); |
| |
| if (ReadStreamPart.class.isInstance(part)) { |
| future.complete(((ReadStreamPart) part).getReadStream()); |
| return future; |
| } |
| |
| try { |
| InputStream inputStream = part.getInputStream(); |
| InputStreamToReadStream inputStreamToReadStream = new InputStreamToReadStream(context, inputStream, true); |
| inputStreamToReadStream.pause(); |
| future.complete(inputStreamToReadStream); |
| } catch (IOException e) { |
| future.completeExceptionally(e); |
| } |
| |
| return future; |
| } |
| |
| public CompletableFuture<Void> toWriteStream(WriteStream<Buffer> writeStream, Handler<Throwable> throwableHandler) { |
| return prepareReadStream() |
| .thenCompose(readStream -> new PumpCommon().pump(context, readStream, writeStream, throwableHandler)) |
| .whenComplete((v, e) -> { |
| DownloadUtils.clearPartResource(part); |
| // PumpImpl will add drainHandler to writeStream, |
| // in order to support write multiple files to same writeStream, |
| // need reset after one stream is successful. |
| writeStream.drainHandler(null); |
| }); |
| } |
| |
| public CompletableFuture<Void> toOutputStream(OutputStream outputStream, boolean autoCloseOutputStream) { |
| if (context == null) { |
| return toOutputStreamSync(outputStream, autoCloseOutputStream); |
| } |
| |
| return toOutputStreamAsync(outputStream, autoCloseOutputStream); |
| } |
| |
| private CompletableFuture<Void> toOutputStreamAsync(OutputStream outputStream, boolean autoCloseOutputStream) { |
| OutputStreamToWriteStream outputStreamToWriteStream = new OutputStreamToWriteStream(context, outputStream, |
| autoCloseOutputStream); |
| return toWriteStream(outputStreamToWriteStream, null); |
| } |
| |
| // DO NOT use a mocked sync context to unify the pump logic |
| // otherwise when pump big stream, will cause stack overflow |
| private CompletableFuture<Void> toOutputStreamSync(OutputStream outputStream, boolean autoCloseOutputStream) { |
| CompletableFuture<Void> future = new CompletableFuture<>(); |
| |
| try (InputStream inputStream = part.getInputStream()) { |
| IOUtils.copyLarge(inputStream, outputStream); |
| } catch (Throwable e) { |
| future.completeExceptionally(e); |
| } |
| |
| if (autoCloseOutputStream) { |
| try { |
| outputStream.close(); |
| } catch (Throwable e) { |
| future.completeExceptionally(e); |
| } |
| } |
| |
| future.complete(null); |
| return future; |
| } |
| } |