1 /* 2 * Copyright (C) 2015 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 package com.android.phone.common.mail; 17 18 import android.util.Base64; 19 import android.util.Base64OutputStream; 20 21 import org.apache.commons.io.IOUtils; 22 23 import java.io.IOException; 24 import java.io.InputStream; 25 import java.io.OutputStream; 26 27 public class Base64Body implements Body { 28 private final InputStream mSource; 29 // Because we consume the input stream, we can only write out once 30 private boolean mAlreadyWritten; 31 Base64Body(InputStream source)32 public Base64Body(InputStream source) { 33 mSource = source; 34 } 35 36 @Override getInputStream()37 public InputStream getInputStream() throws MessagingException { 38 return mSource; 39 } 40 41 /** 42 * This method consumes the input stream, so can only be called once 43 * @param out Stream to write to 44 * @throws IllegalStateException If called more than once 45 * @throws IOException 46 * @throws MessagingException 47 */ 48 @Override writeTo(OutputStream out)49 public void writeTo(OutputStream out) 50 throws IllegalStateException, IOException, MessagingException { 51 if (mAlreadyWritten) { 52 throw new IllegalStateException("Base64Body can only be written once"); 53 } 54 mAlreadyWritten = true; 55 try { 56 final Base64OutputStream b64out = new Base64OutputStream(out, Base64.DEFAULT); 57 IOUtils.copyLarge(mSource, b64out); 58 } finally { 59 mSource.close(); 60 } 61 } 62 } 63