chrismair | 00dc7bd | 2014-05-11 21:21:28 +0000 | [diff] [blame] | 1 | /*
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| 2 | * Copyright 2008 the original author or authors.
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| 3 | *
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License");
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| 5 | * you may not use this file except in compliance with the License.
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| 6 | * You may obtain a copy of the License at
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| 7 | *
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0
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| 9 | *
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| 10 | * Unless required by applicable law or agreed to in writing, software
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 13 | * See the License for the specific language governing permissions and
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| 14 | * limitations under the License.
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| 15 | */
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| 16 | package org.mockftpserver.fake.command;
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| 17 |
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| 18 | import org.mockftpserver.core.command.Command;
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| 19 | import org.mockftpserver.core.command.ReplyCodes;
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| 20 | import org.mockftpserver.core.session.Session;
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| 21 | import org.mockftpserver.fake.filesystem.FileEntry;
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| 22 | import org.mockftpserver.fake.filesystem.FileSystemException;
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| 23 |
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| 24 | import java.io.IOException;
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| 25 | import java.io.OutputStream;
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| 26 |
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| 27 | /**
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| 28 | * Abstract superclass for CommandHandlers that that store a file (STOR, STOU, APPE). Handler logic:
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| 29 | * <ol>
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| 30 | * <li>If the user has not logged in, then reply with 530 and terminate</li>
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| 31 | * <li>If the pathname parameter is required but missing, then reply with 501 and terminate</li>
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| 32 | * <li>If the required pathname parameter does not specify a valid filename, then reply with 553 and terminate</li>
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| 33 | * <li>If the current user does not have write access to the named file, if it already exists, or else to its
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| 34 | * parent directory, then reply with 553 and terminate</li>
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| 35 | * <li>If the current user does not have execute access to the parent directory, then reply with 553 and terminate</li>
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| 36 | * <li>Send an initial reply of 150</li>
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| 37 | * <li>Read all available bytes from the data connection and store/append to the named file in the server file system</li>
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| 38 | * <li>If file write/store fails, then reply with 553 and terminate</li>
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| 39 | * <li>Send a final reply with 226</li>
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| 40 | * </ol>
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| 41 | *
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| 42 | * @author Chris Mair
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| 43 | * @version $Revision$ - $Date$
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| 44 | */
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| 45 | public abstract class AbstractStoreFileCommandHandler extends AbstractFakeCommandHandler {
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| 46 |
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| 47 | protected void handle(Command command, Session session) {
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| 48 | verifyLoggedIn(session);
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| 49 | this.replyCodeForFileSystemException = ReplyCodes.WRITE_FILE_ERROR;
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| 50 |
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| 51 | String filename = getOutputFile(command);
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| 52 | String path = getRealPath(session, filename);
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| 53 | verifyFileSystemCondition(!getFileSystem().isDirectory(path), path, "filesystem.isDirectory");
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| 54 | String parentPath = getFileSystem().getParent(path);
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| 55 | verifyFileSystemCondition(getFileSystem().isDirectory(parentPath), parentPath, "filesystem.isNotADirectory");
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| 56 |
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| 57 | // User must have write permission to the file, if an existing file, or else to the directory if a new file
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| 58 | String pathMustBeWritable = getFileSystem().exists(path) ? path : parentPath;
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| 59 | verifyWritePermission(session, pathMustBeWritable);
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| 60 |
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| 61 | // User must have execute permission to the parent directory
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| 62 | verifyExecutePermission(session, parentPath);
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| 63 |
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| 64 | sendReply(session, ReplyCodes.TRANSFER_DATA_INITIAL_OK);
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| 65 |
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| 66 | session.openDataConnection();
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| 67 | byte[] contents = session.readData();
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| 68 | session.closeDataConnection();
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| 69 |
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| 70 | FileEntry file = (FileEntry) getFileSystem().getEntry(path);
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| 71 | if (file == null) {
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| 72 | file = new FileEntry(path);
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| 73 | getFileSystem().add(file);
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| 74 | }
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| 75 | file.setPermissions(getUserAccount(session).getDefaultPermissionsForNewFile());
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| 76 |
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| 77 | if (contents != null && contents.length > 0) {
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| 78 | OutputStream out = file.createOutputStream(appendToOutputFile());
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| 79 | try {
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| 80 | out.write(contents);
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| 81 | }
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| 82 | catch (IOException e) {
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| 83 | LOG.error("Error writing to file [" + file.getPath() + "]", e);
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| 84 | throw new FileSystemException(file.getPath(), null, e);
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| 85 | }
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| 86 | finally {
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| 87 | try {
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| 88 | out.close();
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| 89 | } catch (IOException e) {
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| 90 | LOG.error("Error closing OutputStream for file [" + file.getPath() + "]", e);
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| 91 | }
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| 92 | }
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| 93 | }
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| 94 | sendReply(session, ReplyCodes.TRANSFER_DATA_FINAL_OK, getMessageKey(), list(filename));
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| 95 | }
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| 96 |
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| 97 | /**
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| 98 | * Return the path (absolute or relative) for the output file. The default behavior is to return
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| 99 | * the required first parameter for the specified Command. Subclasses may override the default behavior.
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| 100 | *
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| 101 | * @param command - the Command
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| 102 | * @return the output file name
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| 103 | */
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| 104 | protected String getOutputFile(Command command) {
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| 105 | return command.getRequiredParameter(0);
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| 106 | }
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| 107 |
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| 108 | /**
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| 109 | * @return true if this command should append the transferred contents to the output file; false means
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| 110 | * overwrite an existing file. This default implentation returns false.
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| 111 | */
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| 112 | protected boolean appendToOutputFile() {
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| 113 | return false;
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| 114 | }
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| 115 |
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| 116 | /**
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| 117 | * @return the message key for the reply message sent with the final (226) reply
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| 118 | */
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| 119 | protected abstract String getMessageKey();
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| 120 |
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| 121 | } |