| /* |
| * 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.commons.vfs2.provider.http5; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URI; |
| |
| import org.apache.commons.vfs2.FileContentInfoFactory; |
| import org.apache.commons.vfs2.FileNotFoundException; |
| import org.apache.commons.vfs2.FileSystemException; |
| import org.apache.commons.vfs2.FileSystemOptions; |
| import org.apache.commons.vfs2.FileType; |
| import org.apache.commons.vfs2.RandomAccessContent; |
| import org.apache.commons.vfs2.provider.AbstractFileName; |
| import org.apache.commons.vfs2.provider.AbstractFileObject; |
| import org.apache.commons.vfs2.provider.GenericURLFileName; |
| import org.apache.commons.vfs2.util.RandomAccessMode; |
| import org.apache.hc.client5.http.classic.methods.HttpGet; |
| import org.apache.hc.client5.http.classic.methods.HttpHead; |
| import org.apache.hc.client5.http.classic.methods.HttpUriRequest; |
| import org.apache.hc.client5.http.impl.classic.CloseableHttpClient; |
| import org.apache.hc.client5.http.protocol.HttpClientContext; |
| import org.apache.hc.client5.http.utils.DateUtils; |
| import org.apache.hc.client5.http.utils.URIUtils; |
| import org.apache.hc.core5.http.ClassicHttpResponse; |
| import org.apache.hc.core5.http.Header; |
| import org.apache.hc.core5.http.HttpHeaders; |
| import org.apache.hc.core5.http.HttpResponse; |
| import org.apache.hc.core5.http.HttpStatus; |
| |
| /** |
| * A file object backed by Apache HttpComponents HttpClient v5. |
| * |
| * @param <FS> An {@link Http5FileSystem} subclass |
| * |
| * @since 2.5.0 |
| */ |
| public class Http5FileObject<FS extends Http5FileSystem> extends AbstractFileObject<FS> { |
| |
| /** |
| * URL charset string. |
| */ |
| private final String urlCharset; |
| |
| /** |
| * Internal URI mapped to this {@code FileObject}. |
| * For example, the internal URI of {@code http4://example.com/a.txt} is {@code http://example.com/a.txt}. |
| */ |
| private final URI internalURI; |
| |
| /** |
| * The last executed HEAD {@code HttpResponse} object. |
| */ |
| private HttpResponse lastHeadResponse; |
| |
| /** |
| * Construct {@code Http4FileObject}. |
| * |
| * @param name file name |
| * @param fileSystem file system |
| * @throws FileSystemException if any error occurs |
| */ |
| protected Http5FileObject(final AbstractFileName name, final FS fileSystem) |
| throws FileSystemException { |
| this(name, fileSystem, Http5FileSystemConfigBuilder.getInstance()); |
| } |
| |
| /** |
| * Construct {@code Http4FileObject}. |
| * |
| * @param name file name |
| * @param fileSystem file system |
| * @param builder {@code Http4FileSystemConfigBuilder} object |
| * @throws FileSystemException if any error occurs |
| */ |
| protected Http5FileObject(final AbstractFileName name, final FS fileSystem, |
| final Http5FileSystemConfigBuilder builder) throws FileSystemException { |
| super(name, fileSystem); |
| final FileSystemOptions fileSystemOptions = fileSystem.getFileSystemOptions(); |
| urlCharset = builder.getUrlCharset(fileSystemOptions); |
| final String pathEncoded = ((GenericURLFileName) name).getPathQueryEncoded(getUrlCharset()); |
| internalURI = URIUtils.resolve(fileSystem.getInternalBaseURI(), pathEncoded); |
| } |
| |
| @Override |
| protected void doDetach() throws Exception { |
| lastHeadResponse = null; |
| } |
| |
| @Override |
| protected long doGetContentSize() throws Exception { |
| if (lastHeadResponse == null) { |
| return 0L; |
| } |
| |
| final Header header = lastHeadResponse.getFirstHeader(HttpHeaders.CONTENT_LENGTH); |
| |
| if (header == null) { |
| // Assume 0 content-length |
| return 0; |
| } |
| |
| return Long.parseLong(header.getValue()); |
| } |
| |
| @Override |
| protected InputStream doGetInputStream(final int bufferSize) throws Exception { |
| final HttpGet getRequest = new HttpGet(getInternalURI()); |
| final ClassicHttpResponse httpResponse = executeHttpUriRequest(getRequest); |
| final int status = httpResponse.getCode(); |
| |
| if (status == HttpStatus.SC_NOT_FOUND) { |
| throw new FileNotFoundException(getName()); |
| } |
| |
| if (status != HttpStatus.SC_OK) { |
| throw new FileSystemException("vfs.provider.http/get.error", getName(), Integer.valueOf(status)); |
| } |
| |
| return new MonitoredHttpResponseContentInputStream(httpResponse, bufferSize); |
| } |
| |
| |
| @Override |
| protected long doGetLastModifiedTime() throws Exception { |
| FileSystemException.requireNonNull(lastHeadResponse, "vfs.provider.http/last-modified.error", getName()); |
| |
| final Header header = lastHeadResponse.getFirstHeader("Last-Modified"); |
| |
| FileSystemException.requireNonNull(header, "vfs.provider.http/last-modified.error", getName()); |
| |
| return DateUtils.parseDate(header.getValue()).getTime(); |
| } |
| |
| @Override |
| protected RandomAccessContent doGetRandomAccessContent(final RandomAccessMode mode) throws Exception { |
| return new Http5RandomAccessContent<>(this, mode); |
| } |
| |
| @Override |
| protected FileType doGetType() throws Exception { |
| lastHeadResponse = executeHttpUriRequest(new HttpHead(getInternalURI())); |
| final int status = lastHeadResponse.getCode(); |
| |
| if (status == HttpStatus.SC_OK |
| || status == HttpStatus.SC_METHOD_NOT_ALLOWED /* method is not allowed, but resource exist */) { |
| return FileType.FILE; |
| } |
| if (status == HttpStatus.SC_NOT_FOUND || status == HttpStatus.SC_GONE) { |
| return FileType.IMAGINARY; |
| } |
| throw new FileSystemException("vfs.provider.http/head.error", getName(), Integer.valueOf(status)); |
| } |
| |
| @Override |
| protected boolean doIsWriteable() throws Exception { |
| return false; |
| } |
| |
| @Override |
| protected String[] doListChildren() throws Exception { |
| throw new UnsupportedOperationException("Not implemented."); |
| } |
| |
| /** |
| * Execute the request using the given {@code httpRequest} and return a {@code ClassicHttpResponse} from the execution. |
| * |
| * @param httpRequest {@code HttpUriRequest} object |
| * @return {@code ClassicHttpResponse} from the execution |
| * @throws IOException if IO error occurs |
| */ |
| protected ClassicHttpResponse executeHttpUriRequest(final HttpUriRequest httpRequest) throws IOException { |
| final CloseableHttpClient httpClient = (CloseableHttpClient) getAbstractFileSystem().getHttpClient(); |
| final HttpClientContext httpClientContext = getAbstractFileSystem().getHttpClientContext(); |
| return httpClient.execute(httpRequest, httpClientContext); |
| } |
| |
| @Override |
| protected FileContentInfoFactory getFileContentInfoFactory() { |
| return new Http5FileContentInfoFactory(); |
| } |
| |
| /** |
| * Return the internal {@code URI} object mapped to this file object. |
| * |
| * @return the internal {@code URI} object mapped to this file object |
| * @throws FileSystemException if any error occurs |
| */ |
| protected URI getInternalURI() throws FileSystemException { |
| return internalURI; |
| } |
| |
| /** |
| * Return the last executed HEAD {@code HttpResponse} object. |
| * |
| * @return the last executed HEAD {@code HttpResponse} object |
| * @throws IOException if IO error occurs |
| */ |
| HttpResponse getLastHeadResponse() throws IOException { |
| if (lastHeadResponse != null) { |
| return lastHeadResponse; |
| } |
| |
| return executeHttpUriRequest(new HttpHead(getInternalURI())); |
| } |
| |
| /** |
| * Return URL charset string. |
| * @return URL charset string |
| */ |
| protected String getUrlCharset() { |
| return urlCharset; |
| } |
| |
| } |