| /* |
| * ==================================================================== |
| * 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| package org.apache.hc.client5.http.impl.cache; |
| |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.RandomAccessFile; |
| import java.nio.channels.FileChannel; |
| |
| import org.apache.hc.client5.http.cache.Resource; |
| import org.apache.hc.client5.http.cache.ResourceFactory; |
| import org.apache.hc.client5.http.cache.ResourceIOException; |
| import org.apache.hc.core5.annotation.Contract; |
| import org.apache.hc.core5.annotation.ThreadingBehavior; |
| import org.apache.hc.core5.util.Args; |
| |
| /** |
| * Generates {@link Resource} instances whose body is stored in a temporary file. |
| * |
| * @since 4.1 |
| */ |
| @Contract(threading = ThreadingBehavior.STATELESS) |
| public class FileResourceFactory implements ResourceFactory { |
| |
| private final File cacheDir; |
| private final BasicIdGenerator idgen; |
| |
| public FileResourceFactory(final File cacheDir) { |
| super(); |
| this.cacheDir = cacheDir; |
| this.idgen = new BasicIdGenerator(); |
| } |
| |
| private File generateUniqueCacheFile(final String requestId) { |
| final StringBuilder buffer = new StringBuilder(); |
| this.idgen.generate(buffer); |
| buffer.append('.'); |
| final int len = Math.min(requestId.length(), 100); |
| for (int i = 0; i < len; i++) { |
| final char ch = requestId.charAt(i); |
| if (Character.isLetterOrDigit(ch) || ch == '.') { |
| buffer.append(ch); |
| } else { |
| buffer.append('-'); |
| } |
| } |
| return new File(this.cacheDir, buffer.toString()); |
| } |
| |
| @Override |
| public Resource generate( |
| final String requestId, |
| final byte[] content, final int off, final int len) throws ResourceIOException { |
| Args.notNull(requestId, "Request id"); |
| final File file = generateUniqueCacheFile(requestId); |
| try (FileOutputStream outStream = new FileOutputStream(file)) { |
| if (content != null) { |
| outStream.write(content, off, len); |
| } |
| } catch (final IOException ex) { |
| throw new ResourceIOException(ex.getMessage(), ex); |
| } |
| return new FileResource(file); |
| } |
| |
| @Override |
| public Resource generate(final String requestId, final byte[] content) throws ResourceIOException { |
| Args.notNull(content, "Content"); |
| return generate(requestId, content, 0, content.length); |
| } |
| |
| @Override |
| public Resource copy( |
| final String requestId, |
| final Resource resource) throws ResourceIOException { |
| final File file = generateUniqueCacheFile(requestId); |
| try { |
| if (resource instanceof FileResource) { |
| try (final RandomAccessFile srcFile = new RandomAccessFile(((FileResource) resource).getFile(), "r"); |
| final RandomAccessFile dstFile = new RandomAccessFile(file, "rw"); |
| final FileChannel src = srcFile.getChannel(); |
| final FileChannel dst = dstFile.getChannel()) { |
| src.transferTo(0, srcFile.length(), dst); |
| } |
| } else { |
| try (final FileOutputStream out = new FileOutputStream(file); |
| final InputStream in = resource.getInputStream()) { |
| final byte[] buf = new byte[2048]; |
| int len; |
| while ((len = in.read(buf)) != -1) { |
| out.write(buf, 0, len); |
| } |
| } |
| } |
| } catch (final IOException ex) { |
| throw new ResourceIOException(ex.getMessage(), ex); |
| } |
| return new FileResource(file); |
| } |
| |
| } |