Andrew Sapperstein | 345c43e | 2013-05-31 16:23:18 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.emailcommon.internet; |
| 18 | |
| 19 | import com.android.emailcommon.mail.MessagingException; |
| 20 | |
| 21 | import java.io.BufferedWriter; |
| 22 | import java.io.IOException; |
| 23 | import java.io.OutputStream; |
| 24 | import java.io.OutputStreamWriter; |
| 25 | import java.util.ArrayList; |
| 26 | |
| 27 | public class MimeHeader { |
| 28 | /** |
| 29 | * Application specific header that contains Store specific information about an attachment. |
| 30 | * In IMAP this contains the IMAP BODYSTRUCTURE part id so that the ImapStore can later |
| 31 | * retrieve the attachment at will from the server. |
Tony Mantler | 4836070 | 2014-03-24 13:56:53 -0700 | [diff] [blame] | 32 | * The info is recorded from this header on LocalStore.appendMessage and is put back |
Andrew Sapperstein | 345c43e | 2013-05-31 16:23:18 -0700 | [diff] [blame] | 33 | * into the MIME data by LocalStore.fetch. |
| 34 | */ |
| 35 | public static final String HEADER_ANDROID_ATTACHMENT_STORE_DATA = "X-Android-Attachment-StoreData"; |
Andrew Sapperstein | 345c43e | 2013-05-31 16:23:18 -0700 | [diff] [blame] | 36 | |
| 37 | public static final String HEADER_CONTENT_TYPE = "Content-Type"; |
| 38 | public static final String HEADER_CONTENT_TRANSFER_ENCODING = "Content-Transfer-Encoding"; |
| 39 | public static final String HEADER_CONTENT_DISPOSITION = "Content-Disposition"; |
| 40 | public static final String HEADER_CONTENT_ID = "Content-ID"; |
| 41 | |
| 42 | /** |
| 43 | * Fields that should be omitted when writing the header using writeTo() |
| 44 | */ |
| 45 | private static final String[] WRITE_OMIT_FIELDS = { |
| 46 | // HEADER_ANDROID_ATTACHMENT_DOWNLOADED, |
| 47 | // HEADER_ANDROID_ATTACHMENT_ID, |
| 48 | HEADER_ANDROID_ATTACHMENT_STORE_DATA |
| 49 | }; |
| 50 | |
| 51 | protected final ArrayList<Field> mFields = new ArrayList<Field>(); |
| 52 | |
| 53 | public void clear() { |
| 54 | mFields.clear(); |
| 55 | } |
| 56 | |
| 57 | public String getFirstHeader(String name) throws MessagingException { |
| 58 | String[] header = getHeader(name); |
| 59 | if (header == null) { |
| 60 | return null; |
| 61 | } |
| 62 | return header[0]; |
| 63 | } |
| 64 | |
| 65 | public void addHeader(String name, String value) throws MessagingException { |
| 66 | mFields.add(new Field(name, value)); |
| 67 | } |
| 68 | |
| 69 | public void setHeader(String name, String value) throws MessagingException { |
| 70 | if (name == null || value == null) { |
| 71 | return; |
| 72 | } |
| 73 | removeHeader(name); |
| 74 | addHeader(name, value); |
| 75 | } |
| 76 | |
| 77 | public String[] getHeader(String name) throws MessagingException { |
| 78 | ArrayList<String> values = new ArrayList<String>(); |
| 79 | for (Field field : mFields) { |
| 80 | if (field.name.equalsIgnoreCase(name)) { |
| 81 | values.add(field.value); |
| 82 | } |
| 83 | } |
| 84 | if (values.size() == 0) { |
| 85 | return null; |
| 86 | } |
| 87 | return values.toArray(new String[] {}); |
| 88 | } |
| 89 | |
| 90 | public void removeHeader(String name) throws MessagingException { |
| 91 | ArrayList<Field> removeFields = new ArrayList<Field>(); |
| 92 | for (Field field : mFields) { |
| 93 | if (field.name.equalsIgnoreCase(name)) { |
| 94 | removeFields.add(field); |
| 95 | } |
| 96 | } |
| 97 | mFields.removeAll(removeFields); |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Write header into String |
| 102 | * |
| 103 | * @return CR-NL separated header string except the headers in writeOmitFields |
| 104 | * null if header is empty |
| 105 | */ |
| 106 | public String writeToString() { |
| 107 | if (mFields.size() == 0) { |
| 108 | return null; |
| 109 | } |
| 110 | StringBuilder builder = new StringBuilder(); |
| 111 | for (Field field : mFields) { |
| 112 | if (!arrayContains(WRITE_OMIT_FIELDS, field.name)) { |
| 113 | builder.append(field.name + ": " + field.value + "\r\n"); |
| 114 | } |
| 115 | } |
| 116 | return builder.toString(); |
| 117 | } |
| 118 | |
| 119 | public void writeTo(OutputStream out) throws IOException, MessagingException { |
| 120 | BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out), 1024); |
| 121 | for (Field field : mFields) { |
| 122 | if (!arrayContains(WRITE_OMIT_FIELDS, field.name)) { |
| 123 | writer.write(field.name + ": " + field.value + "\r\n"); |
| 124 | } |
| 125 | } |
| 126 | writer.flush(); |
| 127 | } |
| 128 | |
| 129 | private static class Field { |
| 130 | final String name; |
| 131 | final String value; |
| 132 | |
| 133 | public Field(String name, String value) { |
| 134 | this.name = name; |
| 135 | this.value = value; |
| 136 | } |
| 137 | |
| 138 | @Override |
| 139 | public String toString() { |
| 140 | return name + "=" + value; |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | @Override |
| 145 | public String toString() { |
| 146 | return (mFields == null) ? null : mFields.toString(); |
| 147 | } |
| 148 | |
| 149 | public final static boolean arrayContains(Object[] a, Object o) { |
| 150 | int index = arrayIndex(a, o); |
| 151 | return (index >= 0); |
| 152 | } |
| 153 | |
| 154 | public final static int arrayIndex(Object[] a, Object o) { |
| 155 | for (int i = 0, count = a.length; i < count; i++) { |
| 156 | if (a[i].equals(o)) { |
| 157 | return i; |
| 158 | } |
| 159 | } |
| 160 | return -1; |
| 161 | } |
| 162 | } |