| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed 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 com.android.emailcommon.internet; |
| |
| import com.android.emailcommon.mail.MessagingException; |
| |
| import java.io.BufferedWriter; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.io.OutputStreamWriter; |
| import java.util.ArrayList; |
| |
| public class MimeHeader { |
| /** |
| * Application specific header that contains Store specific information about an attachment. |
| * In IMAP this contains the IMAP BODYSTRUCTURE part id so that the ImapStore can later |
| * retrieve the attachment at will from the server. |
| * The info is recorded from this header on LocalStore.appendMessage and is put back |
| * into the MIME data by LocalStore.fetch. |
| */ |
| public static final String HEADER_ANDROID_ATTACHMENT_STORE_DATA = "X-Android-Attachment-StoreData"; |
| |
| public static final String HEADER_CONTENT_TYPE = "Content-Type"; |
| public static final String HEADER_CONTENT_TRANSFER_ENCODING = "Content-Transfer-Encoding"; |
| public static final String HEADER_CONTENT_DISPOSITION = "Content-Disposition"; |
| public static final String HEADER_CONTENT_ID = "Content-ID"; |
| |
| /** |
| * Fields that should be omitted when writing the header using writeTo() |
| */ |
| private static final String[] WRITE_OMIT_FIELDS = { |
| // HEADER_ANDROID_ATTACHMENT_DOWNLOADED, |
| // HEADER_ANDROID_ATTACHMENT_ID, |
| HEADER_ANDROID_ATTACHMENT_STORE_DATA |
| }; |
| |
| protected final ArrayList<Field> mFields = new ArrayList<Field>(); |
| |
| public void clear() { |
| mFields.clear(); |
| } |
| |
| public String getFirstHeader(String name) throws MessagingException { |
| String[] header = getHeader(name); |
| if (header == null) { |
| return null; |
| } |
| return header[0]; |
| } |
| |
| public void addHeader(String name, String value) throws MessagingException { |
| mFields.add(new Field(name, value)); |
| } |
| |
| public void setHeader(String name, String value) throws MessagingException { |
| if (name == null || value == null) { |
| return; |
| } |
| removeHeader(name); |
| addHeader(name, value); |
| } |
| |
| public String[] getHeader(String name) throws MessagingException { |
| ArrayList<String> values = new ArrayList<String>(); |
| for (Field field : mFields) { |
| if (field.name.equalsIgnoreCase(name)) { |
| values.add(field.value); |
| } |
| } |
| if (values.size() == 0) { |
| return null; |
| } |
| return values.toArray(new String[] {}); |
| } |
| |
| public void removeHeader(String name) throws MessagingException { |
| ArrayList<Field> removeFields = new ArrayList<Field>(); |
| for (Field field : mFields) { |
| if (field.name.equalsIgnoreCase(name)) { |
| removeFields.add(field); |
| } |
| } |
| mFields.removeAll(removeFields); |
| } |
| |
| /** |
| * Write header into String |
| * |
| * @return CR-NL separated header string except the headers in writeOmitFields |
| * null if header is empty |
| */ |
| public String writeToString() { |
| if (mFields.size() == 0) { |
| return null; |
| } |
| StringBuilder builder = new StringBuilder(); |
| for (Field field : mFields) { |
| if (!arrayContains(WRITE_OMIT_FIELDS, field.name)) { |
| builder.append(field.name + ": " + field.value + "\r\n"); |
| } |
| } |
| return builder.toString(); |
| } |
| |
| public void writeTo(OutputStream out) throws IOException, MessagingException { |
| BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out), 1024); |
| for (Field field : mFields) { |
| if (!arrayContains(WRITE_OMIT_FIELDS, field.name)) { |
| writer.write(field.name + ": " + field.value + "\r\n"); |
| } |
| } |
| writer.flush(); |
| } |
| |
| private static class Field { |
| final String name; |
| final String value; |
| |
| public Field(String name, String value) { |
| this.name = name; |
| this.value = value; |
| } |
| |
| @Override |
| public String toString() { |
| return name + "=" + value; |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return (mFields == null) ? null : mFields.toString(); |
| } |
| |
| public final static boolean arrayContains(Object[] a, Object o) { |
| int index = arrayIndex(a, o); |
| return (index >= 0); |
| } |
| |
| public final static int arrayIndex(Object[] a, Object o) { |
| for (int i = 0, count = a.length; i < count; i++) { |
| if (a[i].equals(o)) { |
| return i; |
| } |
| } |
| return -1; |
| } |
| } |