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/*
* Copyright (C) 2015 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.voicemail.impl.mail.internet;
import com.android.voicemail.impl.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 static final boolean arrayContains(Object[] a, Object o) {
int index = arrayIndex(a, o);
return (index >= 0);
}
public static final 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;
}
}
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