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
17package com.android.emailcommon.internet;
18
19import com.android.emailcommon.mail.BodyPart;
20import com.android.emailcommon.mail.MessagingException;
21import com.android.emailcommon.mail.Multipart;
22
23import java.io.BufferedWriter;
24import java.io.IOException;
25import java.io.InputStream;
26import java.io.OutputStream;
27import java.io.OutputStreamWriter;
28
29public class MimeMultipart extends Multipart {
30    protected String mPreamble;
31
32    protected String mContentType;
33
34    protected String mBoundary;
35
36    protected String mSubType;
37
38    public MimeMultipart() throws MessagingException {
39        mBoundary = generateBoundary();
40        setSubType("mixed");
41    }
42
43    public MimeMultipart(String contentType) throws MessagingException {
44        this.mContentType = contentType;
45        try {
46            mSubType = MimeUtility.getHeaderParameter(contentType, null).split("/")[1];
47            mBoundary = MimeUtility.getHeaderParameter(contentType, "boundary");
48            if (mBoundary == null) {
49                throw new MessagingException("MultiPart does not contain boundary: " + contentType);
50            }
51        } catch (Exception e) {
52            throw new MessagingException(
53                    "Invalid MultiPart Content-Type; must contain subtype and boundary. ("
54                            + contentType + ")", e);
55        }
56    }
57
58    public String generateBoundary() {
59        StringBuffer sb = new StringBuffer();
60        sb.append("----");
61        for (int i = 0; i < 30; i++) {
62            sb.append(Integer.toString((int)(Math.random() * 35), 36));
63        }
64        return sb.toString().toUpperCase();
65    }
66
67    public String getPreamble() throws MessagingException {
68        return mPreamble;
69    }
70
71    public void setPreamble(String preamble) throws MessagingException {
72        this.mPreamble = preamble;
73    }
74
75    @Override
76    public String getContentType() throws MessagingException {
77        return mContentType;
78    }
79
80    public void setSubType(String subType) throws MessagingException {
81        this.mSubType = subType;
82        mContentType = String.format("multipart/%s; boundary=\"%s\"", subType, mBoundary);
83    }
84
85    @Override
86    public void writeTo(OutputStream out) throws IOException, MessagingException {
87        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out), 1024);
88
89        if (mPreamble != null) {
90            writer.write(mPreamble + "\r\n");
91        }
92
93        for (int i = 0, count = mParts.size(); i < count; i++) {
94            BodyPart bodyPart = mParts.get(i);
95            writer.write("--" + mBoundary + "\r\n");
96            writer.flush();
97            bodyPart.writeTo(out);
98            writer.write("\r\n");
99        }
100
101        writer.write("--" + mBoundary + "--\r\n");
102        writer.flush();
103    }
104
105    @Override
106    public InputStream getInputStream() throws MessagingException {
107        return null;
108    }
109
110    public String getSubTypeForTest() {
111        return mSubType;
112    }
113}
114