适用于Java上Gmail的SMTP客户端,使用套接字身份验证问题 [英] SMTP client for Gmail on java using sockets authentication issue
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问题描述
我发现一个套接字SMTP客户端示例进行了一些修改,使其可以使用SSLsockets连接到gmail,但是现在我不知道如何授权我发送的帐户.(我不使用JAVAMAIL,因为这是家庭作业)
I found a socket SMTP client example slightly modified for it to connect to gmail using SSLsockets, but now I don't know how to authorise account, that I am sending from. (I don't use JAVAMAIL, because this is homework)
public class SMTP {
public static void main(String args[]) throws IOException,
UnknownHostException {
String msgFile = "file.txt";
String from = "from@gmail.com";
String to = "to@gmail.com";
String mailHost = "smtp.gmail.com";
SMTP mail = new SMTP(mailHost);
if (mail != null) {
if (mail.send(new FileReader(msgFile), from, to)) {
System.out.println("Mail sent.");
} else {
System.out.println("Connect to SMTP server failed!");
}
}
System.out.println("Done.");
}
static class SMTP {
private final static int SMTP_PORT = 25;
InetAddress mailHost;
InetAddress localhost;
BufferedReader in;
PrintWriter out;
public SMTP(String host) throws UnknownHostException {
mailHost = InetAddress.getByName(host);
localhost = InetAddress.getLocalHost();
System.out.println("mailhost = " + mailHost);
System.out.println("localhost= " + localhost);
System.out.println("SMTP constructor done\n");
}
public boolean send(FileReader msgFileReader, String from, String to)
throws IOException {
SSLSocket smtpPipe;
InputStream inn;
OutputStream outt;
BufferedReader msg;
msg = new BufferedReader(msgFileReader);
smtpPipe = (SSLSocket) ((SSLSocketFactory) SSLSocketFactory.getDefault()).createSocket(InetAddress.getByName("smtp.gmail.com"), 465);
if (smtpPipe == null) {
return false;
}
inn = smtpPipe.getInputStream();
outt = smtpPipe.getOutputStream();
in = new BufferedReader(new InputStreamReader(inn));
out = new PrintWriter(new OutputStreamWriter(outt), true);
if (inn == null || outt == null) {
System.out.println("Failed to open streams to socket.");
return false;
}
String initialID = in.readLine();
System.out.println(initialID);
System.out.println("HELO " + localhost.getHostName());
out.println("HELO " + localhost.getHostName());
String welcome = in.readLine();
System.out.println(welcome);
System.out.println("MAIL From:<" + from + ">");
out.println("MAIL From:<" + from + ">");
String senderOK = in.readLine();
System.out.println(senderOK);
System.out.println("RCPT TO:<" + to + ">");
out.println("RCPT TO:<" + to + ">");
String recipientOK = in.readLine();
System.out.println(recipientOK);
System.out.println("DATA");
out.println("DATA");
String line;
while ((line = msg.readLine()) != null) {
out.println(line);
}
System.out.println(".");
out.println(".");
String acceptedOK = in.readLine();
System.out.println(acceptedOK);
System.out.println("QUIT");
out.println("QUIT");
return true;
}
}
}
推荐答案
重写代码.效果很好.
public class TotalTemp
{
private static DataOutputStream dos;
public static void main(String[] args) throws Exception
{
int delay = 1000;
String user = "xxxxx@gmail.com";
String pass = "xxxxxxxx11";
String username = Base64.encodeBase64String(user.getBytes(StandardCharsets.UTF_8));
String password = Base64.encodeBase64String(pass.getBytes(StandardCharsets.UTF_8));
SSLSocket sock = (SSLSocket)((SSLSocketFactory)SSLSocketFactory.getDefault()).createSocket("smtp.gmail.com", 465);
// Socket sock = new Socket("smtp.gmail.com", 587);
final BufferedReader br = new BufferedReader(new InputStreamReader(sock.getInputStream()));
(new Thread(new Runnable()
{
public void run()
{
try
{
String line;
while((line = br.readLine()) != null)
System.out.println("SERVER: "+line);
}
catch (IOException e)
{
e.printStackTrace();
}
}
})).start();
dos = new DataOutputStream(sock.getOutputStream());
send("EHLO smtp.gmail.com\r\n");
Thread.sleep(delay);
send("AUTH LOGIN\r\n");
Thread.sleep(delay);
send(username + "\r\n");
Thread.sleep(delay);
send(password + "\r\n");
Thread.sleep(delay);
send("MAIL FROM:<XXXXXXXX@gmail.com>\r\n");
//send("\r\n");
Thread.sleep(delay);
send("RCPT TO:<YYYYYYYY@gmail.com>\r\n");
Thread.sleep(delay);
send("DATA\r\n");
Thread.sleep(delay);
send("Subject: Email test\r\n");
Thread.sleep(delay);
send("Test 1 2 3\r\n");
Thread.sleep(delay);
send(".\r\n");
Thread.sleep(delay);
send("QUIT\r\n");
}
private static void send(String s) throws Exception
{
dos.writeBytes(s);
System.out.println("CLIENT: "+s);
}
}
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