1 /* 2 * Copyright (C) 2010 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.tradefed.util; 18 19 import com.android.ddmlib.Log; 20 21 import java.io.BufferedInputStream; 22 import java.io.BufferedOutputStream; 23 import java.io.IOException; 24 import java.util.ArrayList; 25 import java.util.Arrays; 26 import java.util.Collection; 27 import java.util.Iterator; 28 import java.util.List; 29 30 /** 31 * A helper class to send an email. Note that this class is NOT PLATFORM INDEPENDENT. It will 32 * likely fail on Windows, and possibly on Mac OS X as well. It will fail on any machine where 33 * The binary pointed at by the {@code mailer} constant doesn't exist. 34 */ 35 public class Email implements IEmail { 36 private static final String LOG_TAG = "Email"; 37 private static final String[] mailer = {"/usr/sbin/sendmail", "-t", "-i"}; 38 static final String CRLF = "\r\n"; 39 40 private static String join(Collection<String> list, String sep) { 41 StringBuilder builder = new StringBuilder(); 42 Iterator<String> iter = list.iterator(); 43 while (iter.hasNext()) { 44 String element = iter.next(); 45 builder.append(element); 46 if(iter.hasNext()) { 47 builder.append(sep); 48 } 49 } 50 return builder.toString(); 51 } 52 53 /** 54 * A helper method to use ProcessBuilder to create a new process. This can't use 55 * {@link com.android.tradefed.util.IRunUtil} because that class doesn't provide a way to pass 56 * data to the stdin of the spawned process, which is the usage paradigm for most commandline 57 * mailers such as mailx and sendmail. 58 * <p/> 59 * Exposed for mocking 60 * 61 * @param cmd The {@code String[]} to pass to the {@link ProcessBuilder} constructor 62 * @return The {@link Process} returned from from {@link ProcessBuilder#start()} 63 * @throws IOException if sending email failed in a synchronously-detectable way 64 */ 65 Process run(String[] cmd) throws IOException { 66 ProcessBuilder pb = new ProcessBuilder(cmd); 67 pb.redirectErrorStream(true); 68 return pb.start(); 69 } 70 71 /** 72 * A small helper function that adds the specified header to the header list only if the value 73 * is non-null 74 */ 75 private void addHeader(List<String> headers, String name, String value) { 76 if (name == null || value == null) return; 77 headers.add(String.format("%s: %s", name, value)); 78 } 79 80 /** 81 * A small helper function that adds the specified header to the header list only if the value 82 * is non-null 83 */ 84 private void addHeaders(List<String> headers, String name, Collection<String> values) { 85 if (name == null || values == null) return; 86 if (values.isEmpty()) return; 87 88 final String strValues = join(values, ","); 89 headers.add(String.format("%s: %s", name, strValues)); 90 } 91 92 /** 93 * {@inheritDoc} 94 */ 95 @Override 96 public void send(Message msg) throws IllegalArgumentException, IOException { 97 // Sanity checks 98 if (msg.getTo() == null) { 99 throw new IllegalArgumentException("Message is missing a destination"); 100 } else if (msg.getSubject() == null) { 101 throw new IllegalArgumentException("Message is missing a subject"); 102 } else if (msg.getBody() == null) { 103 throw new IllegalArgumentException("Message is missing a body"); 104 } 105 106 // Sender, Recipients, CC, BCC, Subject are all set with appropriate email headers 107 final ArrayList<String> headers = new ArrayList<String>(); 108 final String[] mailCmd; 109 if (msg.getSender() != null) { 110 addHeader(headers, "From", msg.getSender()); 111 112 // Envelope Sender (will receive any errors related to the email) 113 int cmdLen = mailer.length + 2; 114 mailCmd = Arrays.copyOf(mailer, cmdLen); 115 mailCmd[cmdLen - 2] = "-f"; 116 mailCmd[cmdLen - 1] = msg.getSender(); 117 } else { 118 mailCmd = mailer; 119 } 120 addHeaders(headers, "To", msg.getTo()); 121 addHeaders(headers, "Cc", msg.getCc()); 122 addHeaders(headers, "Bcc", msg.getBcc()); 123 addHeader(headers, "Content-type", msg.getContentType()); 124 addHeader(headers, "Subject", msg.getSubject()); 125 126 final StringBuilder fullMsg = new StringBuilder(); 127 fullMsg.append(join(headers, CRLF)); 128 fullMsg.append(CRLF); 129 fullMsg.append(CRLF); 130 fullMsg.append(msg.getBody()); 131 132 Log.d(LOG_TAG, String.format("About to send email with command: %s", 133 Arrays.toString(mailCmd))); 134 Process mailerProc = run(mailCmd); 135 BufferedOutputStream mailerStdin = new BufferedOutputStream(mailerProc.getOutputStream()); 136 /* There is no such thing as a "character" in the land of the shell; there are only bytes. 137 * Here, we convert the body from a Java string (consisting of characters) to a byte array 138 * encoding each character with UTF-8. Each character will be represented as between one 139 * and four bytes apiece. 140 */ 141 mailerStdin.write(fullMsg.toString().getBytes("UTF-8")); 142 mailerStdin.flush(); 143 mailerStdin.close(); 144 145 int retValue; 146 try { 147 retValue = mailerProc.waitFor(); 148 } catch (InterruptedException e) { 149 // ignore, but set retValue to something bogus 150 retValue = -12345; 151 } 152 if (retValue != 0) { 153 Log.e(LOG_TAG, String.format("Mailer finished with non-zero return value: %d", retValue)); 154 BufferedInputStream mailerStdout = new BufferedInputStream(mailerProc.getInputStream()); 155 StringBuilder stdout = new StringBuilder(); 156 int theByte; 157 while((theByte = mailerStdout.read()) != -1) { 158 stdout.append((char)theByte); 159 } 160 Log.e(LOG_TAG, "Mailer output was: " + stdout.toString()); 161 } else { 162 Log.v(LOG_TAG, "Mailer returned successfully."); 163 } 164 } 165 } 166 167
