| /** |
| * 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.hadoop.fs.http.client; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.ContentSummary; |
| import org.apache.hadoop.fs.DelegationTokenRenewer; |
| import org.apache.hadoop.fs.FSDataInputStream; |
| import org.apache.hadoop.fs.FSDataOutputStream; |
| import org.apache.hadoop.fs.FileChecksum; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.PositionedReadable; |
| import org.apache.hadoop.fs.Seekable; |
| import org.apache.hadoop.fs.permission.FsPermission; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.net.NetUtils; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.security.authentication.client.AuthenticatedURL; |
| import org.apache.hadoop.security.authentication.client.Authenticator; |
| import org.apache.hadoop.security.token.Token; |
| import org.apache.hadoop.security.token.TokenIdentifier; |
| import org.apache.hadoop.util.Progressable; |
| import org.apache.hadoop.util.ReflectionUtils; |
| import org.apache.hadoop.util.StringUtils; |
| import org.json.simple.JSONArray; |
| import org.json.simple.JSONObject; |
| |
| import java.io.BufferedInputStream; |
| import java.io.BufferedOutputStream; |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.FileNotFoundException; |
| import java.io.FilterInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.net.HttpURLConnection; |
| import java.net.InetSocketAddress; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.net.URL; |
| import java.security.PrivilegedExceptionAction; |
| import java.text.MessageFormat; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.concurrent.Callable; |
| |
| /** |
| * HttpFSServer implementation of the FileSystemAccess FileSystem. |
| * <p/> |
| * This implementation allows a user to access HDFS over HTTP via a HttpFSServer server. |
| */ |
| @InterfaceAudience.Private |
| public class HttpFSFileSystem extends FileSystem |
| implements DelegationTokenRenewer.Renewable { |
| |
| public static final String SERVICE_NAME = HttpFSUtils.SERVICE_NAME; |
| |
| public static final String SERVICE_VERSION = HttpFSUtils.SERVICE_VERSION; |
| |
| public static final String SCHEME = "webhdfs"; |
| |
| public static final String OP_PARAM = "op"; |
| public static final String DO_AS_PARAM = "doas"; |
| public static final String OVERWRITE_PARAM = "overwrite"; |
| public static final String REPLICATION_PARAM = "replication"; |
| public static final String BLOCKSIZE_PARAM = "blocksize"; |
| public static final String PERMISSION_PARAM = "permission"; |
| public static final String DESTINATION_PARAM = "destination"; |
| public static final String RECURSIVE_PARAM = "recursive"; |
| public static final String SOURCES_PARAM = "sources"; |
| public static final String OWNER_PARAM = "owner"; |
| public static final String GROUP_PARAM = "group"; |
| public static final String MODIFICATION_TIME_PARAM = "modificationtime"; |
| public static final String ACCESS_TIME_PARAM = "accesstime"; |
| |
| public static final Short DEFAULT_PERMISSION = 0755; |
| |
| public static final String RENAME_JSON = "boolean"; |
| |
| public static final String DELETE_JSON = "boolean"; |
| |
| public static final String MKDIRS_JSON = "boolean"; |
| |
| public static final String HOME_DIR_JSON = "Path"; |
| |
| public static final String SET_REPLICATION_JSON = "boolean"; |
| |
| public static final String UPLOAD_CONTENT_TYPE= "application/octet-stream"; |
| |
| public static enum FILE_TYPE { |
| FILE, DIRECTORY, SYMLINK; |
| |
| public static FILE_TYPE getType(FileStatus fileStatus) { |
| if (fileStatus.isFile()) { |
| return FILE; |
| } |
| if (fileStatus.isDirectory()) { |
| return DIRECTORY; |
| } |
| if (fileStatus.isSymlink()) { |
| return SYMLINK; |
| } |
| throw new IllegalArgumentException("Could not determine filetype for: " + |
| fileStatus.getPath()); |
| } |
| } |
| |
| public static final String FILE_STATUSES_JSON = "FileStatuses"; |
| public static final String FILE_STATUS_JSON = "FileStatus"; |
| public static final String PATH_SUFFIX_JSON = "pathSuffix"; |
| public static final String TYPE_JSON = "type"; |
| public static final String LENGTH_JSON = "length"; |
| public static final String OWNER_JSON = "owner"; |
| public static final String GROUP_JSON = "group"; |
| public static final String PERMISSION_JSON = "permission"; |
| public static final String ACCESS_TIME_JSON = "accessTime"; |
| public static final String MODIFICATION_TIME_JSON = "modificationTime"; |
| public static final String BLOCK_SIZE_JSON = "blockSize"; |
| public static final String REPLICATION_JSON = "replication"; |
| |
| public static final String FILE_CHECKSUM_JSON = "FileChecksum"; |
| public static final String CHECKSUM_ALGORITHM_JSON = "algorithm"; |
| public static final String CHECKSUM_BYTES_JSON = "bytes"; |
| public static final String CHECKSUM_LENGTH_JSON = "length"; |
| |
| public static final String CONTENT_SUMMARY_JSON = "ContentSummary"; |
| public static final String CONTENT_SUMMARY_DIRECTORY_COUNT_JSON = "directoryCount"; |
| public static final String CONTENT_SUMMARY_FILE_COUNT_JSON = "fileCount"; |
| public static final String CONTENT_SUMMARY_LENGTH_JSON = "length"; |
| public static final String CONTENT_SUMMARY_QUOTA_JSON = "quota"; |
| public static final String CONTENT_SUMMARY_SPACE_CONSUMED_JSON = "spaceConsumed"; |
| public static final String CONTENT_SUMMARY_SPACE_QUOTA_JSON = "spaceQuota"; |
| |
| public static final String ERROR_JSON = "RemoteException"; |
| public static final String ERROR_EXCEPTION_JSON = "exception"; |
| public static final String ERROR_CLASSNAME_JSON = "javaClassName"; |
| public static final String ERROR_MESSAGE_JSON = "message"; |
| |
| public static final int HTTP_TEMPORARY_REDIRECT = 307; |
| |
| private static final String HTTP_GET = "GET"; |
| private static final String HTTP_PUT = "PUT"; |
| private static final String HTTP_POST = "POST"; |
| private static final String HTTP_DELETE = "DELETE"; |
| |
| @InterfaceAudience.Private |
| public static enum Operation { |
| OPEN(HTTP_GET), GETFILESTATUS(HTTP_GET), LISTSTATUS(HTTP_GET), |
| GETHOMEDIRECTORY(HTTP_GET), GETCONTENTSUMMARY(HTTP_GET), |
| GETFILECHECKSUM(HTTP_GET), GETFILEBLOCKLOCATIONS(HTTP_GET), |
| INSTRUMENTATION(HTTP_GET), |
| APPEND(HTTP_POST), CONCAT(HTTP_POST), |
| CREATE(HTTP_PUT), MKDIRS(HTTP_PUT), RENAME(HTTP_PUT), SETOWNER(HTTP_PUT), |
| SETPERMISSION(HTTP_PUT), SETREPLICATION(HTTP_PUT), SETTIMES(HTTP_PUT), |
| DELETE(HTTP_DELETE); |
| |
| private String httpMethod; |
| |
| Operation(String httpMethod) { |
| this.httpMethod = httpMethod; |
| } |
| |
| public String getMethod() { |
| return httpMethod; |
| } |
| |
| } |
| |
| |
| private AuthenticatedURL.Token authToken = new AuthenticatedURL.Token(); |
| private URI uri; |
| private InetSocketAddress httpFSAddr; |
| private Path workingDir; |
| private UserGroupInformation realUser; |
| private String doAs; |
| private Token<?> delegationToken; |
| |
| //This method enables handling UGI doAs with SPNEGO, we have to |
| //fallback to the realuser who logged in with Kerberos credentials |
| private <T> T doAsRealUserIfNecessary(final Callable<T> callable) |
| throws IOException { |
| try { |
| if (realUser.getShortUserName().equals(doAs)) { |
| return callable.call(); |
| } else { |
| return realUser.doAs(new PrivilegedExceptionAction<T>() { |
| @Override |
| public T run() throws Exception { |
| return callable.call(); |
| } |
| }); |
| } |
| } catch (Exception ex) { |
| throw new IOException(ex.toString(), ex); |
| } |
| } |
| |
| /** |
| * Convenience method that creates a <code>HttpURLConnection</code> for the |
| * HttpFSServer file system operations. |
| * <p/> |
| * This methods performs and injects any needed authentication credentials |
| * via the {@link #getConnection(URL, String)} method |
| * |
| * @param method the HTTP method. |
| * @param params the query string parameters. |
| * @param path the file path |
| * @param makeQualified if the path should be 'makeQualified' |
| * |
| * @return a <code>HttpURLConnection</code> for the HttpFSServer server, |
| * authenticated and ready to use for the specified path and file system operation. |
| * |
| * @throws IOException thrown if an IO error occurrs. |
| */ |
| private HttpURLConnection getConnection(final String method, |
| Map<String, String> params, Path path, boolean makeQualified) |
| throws IOException { |
| if (!realUser.getShortUserName().equals(doAs)) { |
| params.put(DO_AS_PARAM, doAs); |
| } |
| HttpFSKerberosAuthenticator.injectDelegationToken(params, delegationToken); |
| if (makeQualified) { |
| path = makeQualified(path); |
| } |
| final URL url = HttpFSUtils.createHttpURL(path, params); |
| return doAsRealUserIfNecessary(new Callable<HttpURLConnection>() { |
| @Override |
| public HttpURLConnection call() throws Exception { |
| return getConnection(url, method); |
| } |
| }); |
| } |
| |
| /** |
| * Convenience method that creates a <code>HttpURLConnection</code> for the specified URL. |
| * <p/> |
| * This methods performs and injects any needed authentication credentials. |
| * |
| * @param url url to connect to. |
| * @param method the HTTP method. |
| * |
| * @return a <code>HttpURLConnection</code> for the HttpFSServer server, authenticated and ready to use for |
| * the specified path and file system operation. |
| * |
| * @throws IOException thrown if an IO error occurrs. |
| */ |
| private HttpURLConnection getConnection(URL url, String method) throws IOException { |
| Class<? extends Authenticator> klass = |
| getConf().getClass("httpfs.authenticator.class", |
| HttpFSKerberosAuthenticator.class, Authenticator.class); |
| Authenticator authenticator = ReflectionUtils.newInstance(klass, getConf()); |
| try { |
| HttpURLConnection conn = new AuthenticatedURL(authenticator).openConnection(url, authToken); |
| conn.setRequestMethod(method); |
| if (method.equals(HTTP_POST) || method.equals(HTTP_PUT)) { |
| conn.setDoOutput(true); |
| } |
| return conn; |
| } catch (Exception ex) { |
| throw new IOException(ex); |
| } |
| } |
| |
| /** |
| * Called after a new FileSystem instance is constructed. |
| * |
| * @param name a uri whose authority section names the host, port, etc. for this FileSystem |
| * @param conf the configuration |
| */ |
| @Override |
| public void initialize(URI name, Configuration conf) throws IOException { |
| UserGroupInformation ugi = UserGroupInformation.getCurrentUser(); |
| |
| //the real use is the one that has the Kerberos credentials needed for |
| //SPNEGO to work |
| realUser = ugi.getRealUser(); |
| if (realUser == null) { |
| realUser = UserGroupInformation.getLoginUser(); |
| } |
| doAs = ugi.getShortUserName(); |
| super.initialize(name, conf); |
| try { |
| uri = new URI(name.getScheme() + "://" + name.getAuthority()); |
| httpFSAddr = NetUtils.createSocketAddr(getCanonicalUri().toString()); |
| } catch (URISyntaxException ex) { |
| throw new IOException(ex); |
| } |
| } |
| |
| @Override |
| public String getScheme() { |
| return SCHEME; |
| } |
| |
| /** |
| * Returns a URI whose scheme and authority identify this FileSystem. |
| * |
| * @return the URI whose scheme and authority identify this FileSystem. |
| */ |
| @Override |
| public URI getUri() { |
| return uri; |
| } |
| |
| /** |
| * Get the default port for this file system. |
| * @return the default port or 0 if there isn't one |
| */ |
| @Override |
| protected int getDefaultPort() { |
| return getConf().getInt(DFSConfigKeys.DFS_NAMENODE_HTTP_PORT_KEY, |
| DFSConfigKeys.DFS_NAMENODE_HTTP_PORT_DEFAULT); |
| } |
| |
| /** |
| * HttpFSServer subclass of the <code>FSDataInputStream</code>. |
| * <p/> |
| * This implementation does not support the |
| * <code>PositionReadable</code> and <code>Seekable</code> methods. |
| */ |
| private static class HttpFSDataInputStream extends FilterInputStream implements Seekable, PositionedReadable { |
| |
| protected HttpFSDataInputStream(InputStream in, int bufferSize) { |
| super(new BufferedInputStream(in, bufferSize)); |
| } |
| |
| @Override |
| public int read(long position, byte[] buffer, int offset, int length) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void readFully(long position, byte[] buffer, int offset, int length) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void readFully(long position, byte[] buffer) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void seek(long pos) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public long getPos() throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public boolean seekToNewSource(long targetPos) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| |
| /** |
| * Opens an FSDataInputStream at the indicated Path. |
| * </p> |
| * IMPORTANT: the returned <code><FSDataInputStream/code> does not support the |
| * <code>PositionReadable</code> and <code>Seekable</code> methods. |
| * |
| * @param f the file name to open |
| * @param bufferSize the size of the buffer to be used. |
| */ |
| @Override |
| public FSDataInputStream open(Path f, int bufferSize) throws IOException { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put(OP_PARAM, Operation.OPEN.toString()); |
| HttpURLConnection conn = getConnection(Operation.OPEN.getMethod(), params, |
| f, true); |
| HttpFSUtils.validateResponse(conn, HttpURLConnection.HTTP_OK); |
| return new FSDataInputStream( |
| new HttpFSDataInputStream(conn.getInputStream(), bufferSize)); |
| } |
| |
| /** |
| * HttpFSServer subclass of the <code>FSDataOutputStream</code>. |
| * <p/> |
| * This implementation closes the underlying HTTP connection validating the Http connection status |
| * at closing time. |
| */ |
| private static class HttpFSDataOutputStream extends FSDataOutputStream { |
| private HttpURLConnection conn; |
| private int closeStatus; |
| |
| public HttpFSDataOutputStream(HttpURLConnection conn, OutputStream out, int closeStatus, Statistics stats) |
| throws IOException { |
| super(out, stats); |
| this.conn = conn; |
| this.closeStatus = closeStatus; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| try { |
| super.close(); |
| } finally { |
| HttpFSUtils.validateResponse(conn, closeStatus); |
| } |
| } |
| |
| } |
| |
| /** |
| * Converts a <code>FsPermission</code> to a Unix octal representation. |
| * |
| * @param p the permission. |
| * |
| * @return the Unix string symbolic reprentation. |
| */ |
| public static String permissionToString(FsPermission p) { |
| return Integer.toString((p == null) ? DEFAULT_PERMISSION : p.toShort(), 8); |
| } |
| |
| /* |
| * Common handling for uploading data for create and append operations. |
| */ |
| private FSDataOutputStream uploadData(String method, Path f, Map<String, String> params, |
| int bufferSize, int expectedStatus) throws IOException { |
| HttpURLConnection conn = getConnection(method, params, f, true); |
| conn.setInstanceFollowRedirects(false); |
| boolean exceptionAlreadyHandled = false; |
| try { |
| if (conn.getResponseCode() == HTTP_TEMPORARY_REDIRECT) { |
| exceptionAlreadyHandled = true; |
| String location = conn.getHeaderField("Location"); |
| if (location != null) { |
| conn = getConnection(new URL(location), method); |
| conn.setRequestProperty("Content-Type", UPLOAD_CONTENT_TYPE); |
| try { |
| OutputStream os = new BufferedOutputStream(conn.getOutputStream(), bufferSize); |
| return new HttpFSDataOutputStream(conn, os, expectedStatus, statistics); |
| } catch (IOException ex) { |
| HttpFSUtils.validateResponse(conn, expectedStatus); |
| throw ex; |
| } |
| } else { |
| HttpFSUtils.validateResponse(conn, HTTP_TEMPORARY_REDIRECT); |
| throw new IOException("Missing HTTP 'Location' header for [" + conn.getURL() + "]"); |
| } |
| } else { |
| throw new IOException( |
| MessageFormat.format("Expected HTTP status was [307], received [{0}]", |
| conn.getResponseCode())); |
| } |
| } catch (IOException ex) { |
| if (exceptionAlreadyHandled) { |
| throw ex; |
| } else { |
| HttpFSUtils.validateResponse(conn, HTTP_TEMPORARY_REDIRECT); |
| throw ex; |
| } |
| } |
| } |
| |
| |
| /** |
| * Opens an FSDataOutputStream at the indicated Path with write-progress |
| * reporting. |
| * <p/> |
| * IMPORTANT: The <code>Progressable</code> parameter is not used. |
| * |
| * @param f the file name to open. |
| * @param permission file permission. |
| * @param overwrite if a file with this name already exists, then if true, |
| * the file will be overwritten, and if false an error will be thrown. |
| * @param bufferSize the size of the buffer to be used. |
| * @param replication required block replication for the file. |
| * @param blockSize block size. |
| * @param progress progressable. |
| * |
| * @throws IOException |
| * @see #setPermission(Path, FsPermission) |
| */ |
| @Override |
| public FSDataOutputStream create(Path f, FsPermission permission, |
| boolean overwrite, int bufferSize, |
| short replication, long blockSize, |
| Progressable progress) throws IOException { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put(OP_PARAM, Operation.CREATE.toString()); |
| params.put(OVERWRITE_PARAM, Boolean.toString(overwrite)); |
| params.put(REPLICATION_PARAM, Short.toString(replication)); |
| params.put(BLOCKSIZE_PARAM, Long.toString(blockSize)); |
| params.put(PERMISSION_PARAM, permissionToString(permission)); |
| return uploadData(Operation.CREATE.getMethod(), f, params, bufferSize, |
| HttpURLConnection.HTTP_CREATED); |
| } |
| |
| |
| /** |
| * Append to an existing file (optional operation). |
| * <p/> |
| * IMPORTANT: The <code>Progressable</code> parameter is not used. |
| * |
| * @param f the existing file to be appended. |
| * @param bufferSize the size of the buffer to be used. |
| * @param progress for reporting progress if it is not null. |
| * |
| * @throws IOException |
| */ |
| @Override |
| public FSDataOutputStream append(Path f, int bufferSize, |
| Progressable progress) throws IOException { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put(OP_PARAM, Operation.APPEND.toString()); |
| return uploadData(Operation.APPEND.getMethod(), f, params, bufferSize, |
| HttpURLConnection.HTTP_OK); |
| } |
| |
| /** |
| * Concat existing files together. |
| * @param f the path to the target destination. |
| * @param psrcs the paths to the sources to use for the concatenation. |
| * |
| * @throws IOException |
| */ |
| @Override |
| public void concat(Path f, Path[] psrcs) throws IOException { |
| List<String> strPaths = new ArrayList<String>(psrcs.length); |
| for(Path psrc : psrcs) { |
| strPaths.add(psrc.toUri().getPath()); |
| } |
| String srcs = StringUtils.join(",", strPaths); |
| |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put(OP_PARAM, Operation.CONCAT.toString()); |
| params.put(SOURCES_PARAM, srcs); |
| HttpURLConnection conn = getConnection(Operation.CONCAT.getMethod(), |
| params, f, true); |
| HttpFSUtils.validateResponse(conn, HttpURLConnection.HTTP_OK); |
| } |
| |
| /** |
| * Renames Path src to Path dst. Can take place on local fs |
| * or remote DFS. |
| */ |
| @Override |
| public boolean rename(Path src, Path dst) throws IOException { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put(OP_PARAM, Operation.RENAME.toString()); |
| params.put(DESTINATION_PARAM, dst.toString()); |
| HttpURLConnection conn = getConnection(Operation.RENAME.getMethod(), |
| params, src, true); |
| HttpFSUtils.validateResponse(conn, HttpURLConnection.HTTP_OK); |
| JSONObject json = (JSONObject) HttpFSUtils.jsonParse(conn); |
| return (Boolean) json.get(RENAME_JSON); |
| } |
| |
| /** |
| * Delete a file. |
| * |
| * @deprecated Use delete(Path, boolean) instead |
| */ |
| @SuppressWarnings({"deprecation"}) |
| @Deprecated |
| @Override |
| public boolean delete(Path f) throws IOException { |
| return delete(f, false); |
| } |
| |
| /** |
| * Delete a file. |
| * |
| * @param f the path to delete. |
| * @param recursive if path is a directory and set to |
| * true, the directory is deleted else throws an exception. In |
| * case of a file the recursive can be set to either true or false. |
| * |
| * @return true if delete is successful else false. |
| * |
| * @throws IOException |
| */ |
| @Override |
| public boolean delete(Path f, boolean recursive) throws IOException { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put(OP_PARAM, Operation.DELETE.toString()); |
| params.put(RECURSIVE_PARAM, Boolean.toString(recursive)); |
| HttpURLConnection conn = getConnection(Operation.DELETE.getMethod(), |
| params, f, true); |
| HttpFSUtils.validateResponse(conn, HttpURLConnection.HTTP_OK); |
| JSONObject json = (JSONObject) HttpFSUtils.jsonParse(conn); |
| return (Boolean) json.get(DELETE_JSON); |
| } |
| |
| /** |
| * List the statuses of the files/directories in the given path if the path is |
| * a directory. |
| * |
| * @param f given path |
| * |
| * @return the statuses of the files/directories in the given patch |
| * |
| * @throws IOException |
| */ |
| @Override |
| public FileStatus[] listStatus(Path f) throws IOException { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put(OP_PARAM, Operation.LISTSTATUS.toString()); |
| HttpURLConnection conn = getConnection(Operation.LISTSTATUS.getMethod(), |
| params, f, true); |
| HttpFSUtils.validateResponse(conn, HttpURLConnection.HTTP_OK); |
| JSONObject json = (JSONObject) HttpFSUtils.jsonParse(conn); |
| json = (JSONObject) json.get(FILE_STATUSES_JSON); |
| JSONArray jsonArray = (JSONArray) json.get(FILE_STATUS_JSON); |
| FileStatus[] array = new FileStatus[jsonArray.size()]; |
| f = makeQualified(f); |
| for (int i = 0; i < jsonArray.size(); i++) { |
| array[i] = createFileStatus(f, (JSONObject) jsonArray.get(i)); |
| } |
| return array; |
| } |
| |
| /** |
| * Set the current working directory for the given file system. All relative |
| * paths will be resolved relative to it. |
| * |
| * @param newDir new directory. |
| */ |
| @Override |
| public void setWorkingDirectory(Path newDir) { |
| workingDir = newDir; |
| } |
| |
| /** |
| * Get the current working directory for the given file system |
| * |
| * @return the directory pathname |
| */ |
| @Override |
| public Path getWorkingDirectory() { |
| if (workingDir == null) { |
| workingDir = getHomeDirectory(); |
| } |
| return workingDir; |
| } |
| |
| /** |
| * Make the given file and all non-existent parents into |
| * directories. Has the semantics of Unix 'mkdir -p'. |
| * Existence of the directory hierarchy is not an error. |
| */ |
| @Override |
| public boolean mkdirs(Path f, FsPermission permission) throws IOException { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put(OP_PARAM, Operation.MKDIRS.toString()); |
| params.put(PERMISSION_PARAM, permissionToString(permission)); |
| HttpURLConnection conn = getConnection(Operation.MKDIRS.getMethod(), |
| params, f, true); |
| HttpFSUtils.validateResponse(conn, HttpURLConnection.HTTP_OK); |
| JSONObject json = (JSONObject) HttpFSUtils.jsonParse(conn); |
| return (Boolean) json.get(MKDIRS_JSON); |
| } |
| |
| /** |
| * Return a file status object that represents the path. |
| * |
| * @param f The path we want information from |
| * |
| * @return a FileStatus object |
| * |
| * @throws FileNotFoundException when the path does not exist; |
| * IOException see specific implementation |
| */ |
| @Override |
| public FileStatus getFileStatus(Path f) throws IOException { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put(OP_PARAM, Operation.GETFILESTATUS.toString()); |
| HttpURLConnection conn = getConnection(Operation.GETFILESTATUS.getMethod(), |
| params, f, true); |
| HttpFSUtils.validateResponse(conn, HttpURLConnection.HTTP_OK); |
| JSONObject json = (JSONObject) HttpFSUtils.jsonParse(conn); |
| json = (JSONObject) json.get(FILE_STATUS_JSON); |
| f = makeQualified(f); |
| return createFileStatus(f, json); |
| } |
| |
| /** |
| * Return the current user's home directory in this filesystem. |
| * The default implementation returns "/user/$USER/". |
| */ |
| @Override |
| public Path getHomeDirectory() { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put(OP_PARAM, Operation.GETHOMEDIRECTORY.toString()); |
| try { |
| HttpURLConnection conn = |
| getConnection(Operation.GETHOMEDIRECTORY.getMethod(), params, |
| new Path(getUri().toString(), "/"), false); |
| HttpFSUtils.validateResponse(conn, HttpURLConnection.HTTP_OK); |
| JSONObject json = (JSONObject) HttpFSUtils.jsonParse(conn); |
| return new Path((String) json.get(HOME_DIR_JSON)); |
| } catch (IOException ex) { |
| throw new RuntimeException(ex); |
| } |
| } |
| |
| /** |
| * Set owner of a path (i.e. a file or a directory). |
| * The parameters username and groupname cannot both be null. |
| * |
| * @param p The path |
| * @param username If it is null, the original username remains unchanged. |
| * @param groupname If it is null, the original groupname remains unchanged. |
| */ |
| @Override |
| public void setOwner(Path p, String username, String groupname) |
| throws IOException { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put(OP_PARAM, Operation.SETOWNER.toString()); |
| params.put(OWNER_PARAM, username); |
| params.put(GROUP_PARAM, groupname); |
| HttpURLConnection conn = getConnection(Operation.SETOWNER.getMethod(), |
| params, p, true); |
| HttpFSUtils.validateResponse(conn, HttpURLConnection.HTTP_OK); |
| } |
| |
| /** |
| * Set permission of a path. |
| * |
| * @param p path. |
| * @param permission permission. |
| */ |
| @Override |
| public void setPermission(Path p, FsPermission permission) throws IOException { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put(OP_PARAM, Operation.SETPERMISSION.toString()); |
| params.put(PERMISSION_PARAM, permissionToString(permission)); |
| HttpURLConnection conn = getConnection(Operation.SETPERMISSION.getMethod(), params, p, true); |
| HttpFSUtils.validateResponse(conn, HttpURLConnection.HTTP_OK); |
| } |
| |
| /** |
| * Set access time of a file |
| * |
| * @param p The path |
| * @param mtime Set the modification time of this file. |
| * The number of milliseconds since Jan 1, 1970. |
| * A value of -1 means that this call should not set modification time. |
| * @param atime Set the access time of this file. |
| * The number of milliseconds since Jan 1, 1970. |
| * A value of -1 means that this call should not set access time. |
| */ |
| @Override |
| public void setTimes(Path p, long mtime, long atime) throws IOException { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put(OP_PARAM, Operation.SETTIMES.toString()); |
| params.put(MODIFICATION_TIME_PARAM, Long.toString(mtime)); |
| params.put(ACCESS_TIME_PARAM, Long.toString(atime)); |
| HttpURLConnection conn = getConnection(Operation.SETTIMES.getMethod(), |
| params, p, true); |
| HttpFSUtils.validateResponse(conn, HttpURLConnection.HTTP_OK); |
| } |
| |
| /** |
| * Set replication for an existing file. |
| * |
| * @param src file name |
| * @param replication new replication |
| * |
| * @return true if successful; |
| * false if file does not exist or is a directory |
| * |
| * @throws IOException |
| */ |
| @Override |
| public boolean setReplication(Path src, short replication) |
| throws IOException { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put(OP_PARAM, Operation.SETREPLICATION.toString()); |
| params.put(REPLICATION_PARAM, Short.toString(replication)); |
| HttpURLConnection conn = |
| getConnection(Operation.SETREPLICATION.getMethod(), params, src, true); |
| HttpFSUtils.validateResponse(conn, HttpURLConnection.HTTP_OK); |
| JSONObject json = (JSONObject) HttpFSUtils.jsonParse(conn); |
| return (Boolean) json.get(SET_REPLICATION_JSON); |
| } |
| |
| private FileStatus createFileStatus(Path parent, JSONObject json) { |
| String pathSuffix = (String) json.get(PATH_SUFFIX_JSON); |
| Path path = (pathSuffix.equals("")) ? parent : new Path(parent, pathSuffix); |
| FILE_TYPE type = FILE_TYPE.valueOf((String) json.get(TYPE_JSON)); |
| long len = (Long) json.get(LENGTH_JSON); |
| String owner = (String) json.get(OWNER_JSON); |
| String group = (String) json.get(GROUP_JSON); |
| FsPermission permission = |
| new FsPermission(Short.parseShort((String) json.get(PERMISSION_JSON), 8)); |
| long aTime = (Long) json.get(ACCESS_TIME_JSON); |
| long mTime = (Long) json.get(MODIFICATION_TIME_JSON); |
| long blockSize = (Long) json.get(BLOCK_SIZE_JSON); |
| short replication = ((Long) json.get(REPLICATION_JSON)).shortValue(); |
| FileStatus fileStatus = null; |
| |
| switch (type) { |
| case FILE: |
| case DIRECTORY: |
| fileStatus = new FileStatus(len, (type == FILE_TYPE.DIRECTORY), |
| replication, blockSize, mTime, aTime, |
| permission, owner, group, path); |
| break; |
| case SYMLINK: |
| Path symLink = null; |
| fileStatus = new FileStatus(len, false, |
| replication, blockSize, mTime, aTime, |
| permission, owner, group, symLink, |
| path); |
| } |
| return fileStatus; |
| } |
| |
| @Override |
| public ContentSummary getContentSummary(Path f) throws IOException { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put(OP_PARAM, Operation.GETCONTENTSUMMARY.toString()); |
| HttpURLConnection conn = |
| getConnection(Operation.GETCONTENTSUMMARY.getMethod(), params, f, true); |
| HttpFSUtils.validateResponse(conn, HttpURLConnection.HTTP_OK); |
| JSONObject json = (JSONObject) ((JSONObject) |
| HttpFSUtils.jsonParse(conn)).get(CONTENT_SUMMARY_JSON); |
| return new ContentSummary((Long) json.get(CONTENT_SUMMARY_LENGTH_JSON), |
| (Long) json.get(CONTENT_SUMMARY_FILE_COUNT_JSON), |
| (Long) json.get(CONTENT_SUMMARY_DIRECTORY_COUNT_JSON), |
| (Long) json.get(CONTENT_SUMMARY_QUOTA_JSON), |
| (Long) json.get(CONTENT_SUMMARY_SPACE_CONSUMED_JSON), |
| (Long) json.get(CONTENT_SUMMARY_SPACE_QUOTA_JSON) |
| ); |
| } |
| |
| @Override |
| public FileChecksum getFileChecksum(Path f) throws IOException { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put(OP_PARAM, Operation.GETFILECHECKSUM.toString()); |
| HttpURLConnection conn = |
| getConnection(Operation.GETFILECHECKSUM.getMethod(), params, f, true); |
| HttpFSUtils.validateResponse(conn, HttpURLConnection.HTTP_OK); |
| final JSONObject json = (JSONObject) ((JSONObject) |
| HttpFSUtils.jsonParse(conn)).get(FILE_CHECKSUM_JSON); |
| return new FileChecksum() { |
| @Override |
| public String getAlgorithmName() { |
| return (String) json.get(CHECKSUM_ALGORITHM_JSON); |
| } |
| |
| @Override |
| public int getLength() { |
| return ((Long) json.get(CHECKSUM_LENGTH_JSON)).intValue(); |
| } |
| |
| @Override |
| public byte[] getBytes() { |
| return StringUtils.hexStringToByte((String) json.get(CHECKSUM_BYTES_JSON)); |
| } |
| |
| @Override |
| public void write(DataOutput out) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void readFields(DataInput in) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| }; |
| } |
| |
| |
| @Override |
| public Token<?> getDelegationToken(final String renewer) |
| throws IOException { |
| return doAsRealUserIfNecessary(new Callable<Token<?>>() { |
| @Override |
| public Token<?> call() throws Exception { |
| return HttpFSKerberosAuthenticator. |
| getDelegationToken(uri, httpFSAddr, authToken, renewer); |
| } |
| }); |
| } |
| |
| public long renewDelegationToken(final Token<?> token) throws IOException { |
| return doAsRealUserIfNecessary(new Callable<Long>() { |
| @Override |
| public Long call() throws Exception { |
| return HttpFSKerberosAuthenticator. |
| renewDelegationToken(uri, authToken, token); |
| } |
| }); |
| } |
| |
| public void cancelDelegationToken(final Token<?> token) throws IOException { |
| HttpFSKerberosAuthenticator. |
| cancelDelegationToken(uri, authToken, token); |
| } |
| |
| @Override |
| public Token<?> getRenewToken() { |
| return delegationToken; |
| } |
| |
| @Override |
| public <T extends TokenIdentifier> void setDelegationToken(Token<T> token) { |
| delegationToken = token; |
| } |
| |
| } |
