petrovic-d commented on code in PR #7698: URL: https://github.com/apache/netbeans/pull/7698#discussion_r1734789448
########## enterprise/cloud.oracle/src/org/netbeans/modules/cloud/oracle/assets/ConfigFileGenerator.java: ########## @@ -0,0 +1,213 @@ +/* + * 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.netbeans.modules.cloud.oracle.assets; + +import java.io.FileWriter; +import java.io.IOException; +import java.io.Writer; +import java.nio.charset.Charset; +import java.nio.file.DirectoryStream; +import java.nio.file.FileSystems; +import java.nio.file.Files; +import java.nio.file.LinkOption; +import java.nio.file.Path; +import java.nio.file.attribute.AclEntry; +import java.nio.file.attribute.AclEntryPermission; +import static java.nio.file.attribute.AclEntryPermission.APPEND_DATA; +import static java.nio.file.attribute.AclEntryPermission.DELETE; +import static java.nio.file.attribute.AclEntryPermission.READ_ACL; +import static java.nio.file.attribute.AclEntryPermission.READ_ATTRIBUTES; +import static java.nio.file.attribute.AclEntryPermission.READ_DATA; +import static java.nio.file.attribute.AclEntryPermission.READ_NAMED_ATTRS; +import static java.nio.file.attribute.AclEntryPermission.SYNCHRONIZE; +import static java.nio.file.attribute.AclEntryPermission.WRITE_ACL; +import static java.nio.file.attribute.AclEntryPermission.WRITE_ATTRIBUTES; +import static java.nio.file.attribute.AclEntryPermission.WRITE_DATA; +import static java.nio.file.attribute.AclEntryPermission.WRITE_NAMED_ATTRS; +import java.nio.file.attribute.AclFileAttributeView; +import java.nio.file.attribute.DosFileAttributeView; +import java.nio.file.attribute.FileAttribute; +import java.nio.file.attribute.PosixFileAttributeView; +import java.nio.file.attribute.PosixFilePermission; +import static java.nio.file.attribute.PosixFilePermission.OWNER_READ; +import static java.nio.file.attribute.PosixFilePermission.OWNER_WRITE; +import java.nio.file.attribute.PosixFilePermissions; +import java.util.Collections; +import java.util.EnumSet; +import java.util.Properties; +import java.util.Set; +import java.util.logging.Level; +import java.util.logging.Logger; + +/** + * + * @author Dusan Petrovic + */ +public class ConfigFileGenerator { + + private static final Logger LOG = Logger.getLogger(ConfigFileGenerator.class.getName()); + + private static final boolean POSIX = FileSystems.getDefault().supportedFileAttributeViews().contains("posix"); // NOI18N + private static final EnumSet<PosixFilePermission> readWritePosix = EnumSet.of(OWNER_READ, OWNER_WRITE); + private static final EnumSet<PosixFilePermission> readPosix = EnumSet.of(OWNER_READ); + + private static final EnumSet<AclEntryPermission> readOnlyAcl = EnumSet.of( + READ_ACL, + READ_ATTRIBUTES, + WRITE_ATTRIBUTES, + READ_DATA, + READ_NAMED_ATTRS, + DELETE, + SYNCHRONIZE + ); + + private static final EnumSet<AclEntryPermission> readWriteAcl = EnumSet.of( + READ_DATA, + WRITE_DATA, + APPEND_DATA, + READ_NAMED_ATTRS, + WRITE_NAMED_ATTRS, + READ_ATTRIBUTES, + WRITE_ATTRIBUTES, + READ_ACL, + WRITE_ACL + ); + + private static final Path tmpdir = Path.of(System.getProperty("java.io.tmpdir")); // NOI18N + + private final Boolean readOnly; + private final String filePrefix; + private final String fileSufix; + private final String configPath; + + public ConfigFileGenerator(String filePrefix, String fileSufix, String configPath, boolean readOnly) { + this.readOnly = readOnly; + this.configPath = configPath; + this.filePrefix = filePrefix; + this.fileSufix = fileSufix; + } + + public Path generateConfigFile() throws IOException { + Path dir = generateDirPath(); + + if (!Files.isDirectory(dir, LinkOption.NOFOLLOW_LINKS)) { + Files.createDirectory(dir); + } + if (POSIX) { + return createFilePosix(dir); + } + + Path temp = Files.createTempFile(dir, this.filePrefix, this.fileSufix); + try { + setFileOwnerAcl(temp, readWriteAcl); + } catch (IOException ex) { + deleteTempFile(temp); + throw ex; + } + return temp; + } + + public void writePropertiesToFile(Properties props, Path filePath) throws IOException { + try (Writer writer = new FileWriter(filePath.toFile(), Charset.defaultCharset());) { + props.store(writer, ""); + if (POSIX) { + setFilePermissionPosix(filePath); + } else { + if (readOnly) { + DosFileAttributeView attribs = Files.getFileAttributeView(filePath, DosFileAttributeView.class); + attribs.setReadOnly(true); + setFileOwnerAcl(filePath, readOnlyAcl); + } else { + setFileOwnerAcl(filePath, readWriteAcl); + } + } + filePath.toFile().deleteOnExit(); + } + } + + private void setFileOwnerAcl(Path filePath, Set<AclEntryPermission> permissions) throws IOException { + AclFileAttributeView acl = Files.getFileAttributeView(filePath, AclFileAttributeView.class); + AclEntry ownerEntry = findFileOwner(acl); + + if (ownerEntry == null) { + throw new IOException("Owner missing, file:" + filePath.toString()); // NOI18N + } + + AclEntry ownerAcl = AclEntry.newBuilder(ownerEntry).setPermissions(permissions).build(); + acl.setAcl(Collections.singletonList(ownerAcl)); + } + + private AclEntry findFileOwner(AclFileAttributeView acl) throws IOException { + for(AclEntry e : acl.getAcl()) { + if (e.principal().equals(acl.getOwner())) { + return e; + } + } + return null; + } + + private void setFilePermissionPosix(Path temp) throws IOException { + PosixFileAttributeView attributes = Files.getFileAttributeView(temp, PosixFileAttributeView.class); + if (this.readOnly) { + attributes.setPermissions(readPosix); + } else { + attributes.setPermissions(readWritePosix); + } + } + + + private Path createFilePosix(Path dir) throws IOException { + FileAttribute<?> readWriteAttribs = PosixFilePermissions.asFileAttribute(readWritePosix); + return Files.createTempFile(dir,this.filePrefix, this.fileSufix, readWriteAttribs); + } + + Path generateDirPath() { + String s = this.configPath + "_" + System.getProperty("user.name"); // NOI18N + Path name = tmpdir.getFileSystem().getPath(s); + return tmpdir.resolve(name); + } + + void deleteTempFile(Path temp) { + if (temp != null && Files.isRegularFile(temp, LinkOption.NOFOLLOW_LINKS)) { + try { + if (POSIX) { + PosixFileAttributeView attribs = Files.getFileAttributeView(temp, PosixFileAttributeView.class); + attribs.setPermissions(readWritePosix); + } else { + DosFileAttributeView attribs = Files.getFileAttributeView(temp, DosFileAttributeView.class); + attribs.setReadOnly(false); + } + Files.delete(temp); + } catch (IOException ex) { + LOG.log(Level.WARNING, "deleteTempFile", ex); + } + } + } + + void deleteOldFiles() throws IOException { + Path dir = generateDirPath(); + if (Files.isDirectory(dir, LinkOption.NOFOLLOW_LINKS)) { + try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir)) { + for (Path f : stream) { Review Comment: I doubt that any folder will happen, but even in that case the `deleteTempFile` method has a check if it is a file So files are expected -- This is an automated message from the Apache Git Service. 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