| /* |
| * 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.jackrabbit.oak.plugins.blob.datastore.directaccess; |
| |
| import java.nio.charset.Charset; |
| import java.nio.charset.StandardCharsets; |
| import java.util.Set; |
| |
| import org.apache.jackrabbit.oak.api.blob.BlobDownloadOptions; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import com.google.common.base.Charsets; |
| import com.google.common.base.Joiner; |
| import com.google.common.base.Strings; |
| import com.google.common.collect.Sets; |
| |
| /** |
| * Contains download options for downloading a data record directly from a |
| * storage location using the direct download feature. |
| */ |
| public class DataRecordDownloadOptions { |
| static final String DISPOSITION_TYPE_INLINE = "inline"; |
| static final String DISPOSITION_TYPE_ATTACHMENT = "attachment"; |
| |
| private static final char[] hex = { |
| '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' |
| }; |
| private static final Set<Character> rfc5987AllowedChars = Sets.newHashSet( |
| '0','1','2','3','4','5','6','7','8','9', |
| 'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z', |
| 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z', |
| '!','#','$','&','+','-','.','^','_','`','|','~' |
| ); |
| |
| /** |
| * Create an instance of this class directly from a {@link |
| * BlobDownloadOptions} instance. |
| * |
| * @param downloadOptions The download options to use to initialize this |
| * instance. |
| * @return The new instance of this class. |
| */ |
| public static DataRecordDownloadOptions fromBlobDownloadOptions( |
| @NotNull BlobDownloadOptions downloadOptions) { |
| return new DataRecordDownloadOptions( |
| downloadOptions.getMediaType(), |
| downloadOptions.getCharacterEncoding(), |
| downloadOptions.getFileName(), |
| downloadOptions.getDispositionType(), |
| downloadOptions.isDomainOverrideIgnored() |
| ); |
| } |
| |
| /** |
| * Provides a default implementation of this class. Clients should use this |
| * instance when they have no options to specify and are willing to accept |
| * the service provider default behavior. |
| */ |
| public static DataRecordDownloadOptions DEFAULT = |
| new DataRecordDownloadOptions(null, |
| null, |
| null, |
| DISPOSITION_TYPE_INLINE, |
| false); |
| |
| private final String mediaType; |
| private final String characterEncoding; |
| private final String fileName; |
| private final String dispositionType; |
| private boolean domainOverrideIgnored = false; |
| |
| private String contentTypeHeader = null; |
| private String contentDispositionHeader = null; |
| |
| private DataRecordDownloadOptions(final String mediaType, |
| final String characterEncoding, |
| final String fileName, |
| final String dispositionType, |
| boolean domainOverrideIgnored) { |
| this.mediaType = mediaType; |
| this.characterEncoding = characterEncoding; |
| this.fileName = fileName; |
| this.dispositionType = Strings.isNullOrEmpty(dispositionType) ? |
| DISPOSITION_TYPE_INLINE : |
| dispositionType; |
| this.domainOverrideIgnored = domainOverrideIgnored; |
| } |
| |
| /** |
| * Generate the correct HTTP {@code Content-Type} header value from the |
| * {@link #mediaType} and {@link #characterEncoding} in this class, if set. |
| * <p> |
| * If {@link #mediaType} has not been given a value, this method will return |
| * {@code null}. |
| * |
| * @return The correct value for a {@code Content-Type} header, or {@code |
| * null} if the {@link #mediaType} has not been specified. |
| */ |
| @Nullable |
| public String getContentTypeHeader() { |
| if (Strings.isNullOrEmpty(contentTypeHeader)) { |
| if (!Strings.isNullOrEmpty(mediaType)) { |
| contentTypeHeader = Strings.isNullOrEmpty(characterEncoding) ? |
| mediaType : |
| Joiner.on("; charset=").join(mediaType, characterEncoding); |
| } |
| } |
| return contentTypeHeader; |
| } |
| |
| /** |
| * Generate the correct HTTP {@code Content-Disposition} header value from |
| * the {@link #fileName} and {@link #dispositionType} in this class, if set. |
| * <p> |
| * A value will be returned if the file name has been set, OR if the |
| * disposition type has been explicitly set to "attachment". Otherwise |
| * {@code null} will be returned. |
| * |
| * @return The correct value for a {@code Content-Disposition} header, or |
| * {@code null} if the {@link #fileName} has not been specified and |
| * the {@link #dispositionType} has not been set to "attachment". |
| */ |
| @Nullable |
| public String getContentDispositionHeader() { |
| if (Strings.isNullOrEmpty(contentDispositionHeader)) { |
| if (!Strings.isNullOrEmpty(fileName)) { |
| String dispositionType = this.dispositionType; |
| if (Strings.isNullOrEmpty(dispositionType)) { |
| dispositionType = DISPOSITION_TYPE_INLINE; |
| } |
| contentDispositionHeader = formatContentDispositionHeader(dispositionType, fileName, rfc8187Encode(fileName)); |
| } |
| else if (DISPOSITION_TYPE_ATTACHMENT.equals(this.dispositionType)) { |
| contentDispositionHeader = DISPOSITION_TYPE_ATTACHMENT; |
| } |
| } |
| return contentDispositionHeader; |
| } |
| |
| private String formatContentDispositionHeader(@NotNull final String dispositionType, |
| @NotNull final String fileName, |
| @Nullable final String rfc8187EncodedFileName) { |
| Charset ISO_8859_1 = Charsets.ISO_8859_1; |
| String iso_8859_1_fileName = new String( |
| ISO_8859_1.encode(fileName).array(), |
| ISO_8859_1 |
| ).replace("\"", "\\\""); |
| return null != rfc8187EncodedFileName ? |
| String.format("%s; filename=\"%s\"; filename*=UTF-8''%s", |
| dispositionType, iso_8859_1_fileName, rfc8187EncodedFileName) : |
| String.format("%s; filename=\"%s\"", |
| dispositionType, iso_8859_1_fileName); |
| } |
| |
| private String rfc8187Encode(@NotNull final String input) { |
| byte[] bytes = input.getBytes(StandardCharsets.UTF_8); |
| StringBuilder sb = new StringBuilder(); |
| for (byte b : bytes) { |
| char c = (char) b; |
| if (rfc5987AllowedChars.contains(c)) { |
| sb.append(c); |
| } |
| else { |
| sb.append('%'); |
| sb.append(hex[0x0F & (b >>> 4)]); |
| sb.append(hex[b & 0x0F]); |
| } |
| } |
| return sb.toString(); |
| } |
| |
| /** |
| * Returns the media type of this instance. |
| * |
| * @return The media type, or {@code null} if it has not been set. |
| */ |
| @Nullable |
| public String getMediaType() { |
| return mediaType; |
| } |
| |
| /** |
| * Returns the character encoding of this instance. |
| * |
| * @return The character encoding, or {@code null} if it has not been set. |
| */ |
| @Nullable |
| public String getCharacterEncoding() { |
| return characterEncoding; |
| } |
| |
| /** |
| * Returns the file name of this instance. |
| * |
| * @return The file name, or {@code null} if it has not been set. |
| */ |
| @Nullable |
| public String getFileName() { |
| return fileName; |
| } |
| |
| /** |
| * Returns the disposition type of this instance. |
| * |
| * @return The disposition type, or {@code null} if it has not been set. |
| */ |
| @Nullable |
| public String getDispositionType() { |
| return dispositionType; |
| } |
| |
| /** |
| * Indicates whether the data store should ignore any configured download |
| * domain override value when generating the signed download URI. |
| * |
| * @return true if the domain override should be ignored; false otherwise. |
| */ |
| public boolean isDomainOverrideIgnored() { return domainOverrideIgnored; } |
| } |