我想实现一个简单的IMAP客户端。我可以连接到服务器,收到它的问候语,但似乎在login
命令后收到响应时出现问题。Java中的IMAP客户端(仅限套接字)在接收时挂起
我知道IMAP行以\r\n
或.\r\n
结尾,但似乎一次只读一个字节根本不起作用,我不知道为什么。
我的代码:
class NewClass {
public static String readAll(Socket socket, String end) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
StringBuilder sb = new StringBuilder();
String line;
while (!sb.toString().endsWith(end))
{
char c = (char)reader.read();
sb.append(c);
}
return sb.toString();
}
public static void main(String[] args) throws IOException {
String host = "x.x.x.x";
int port = 143;
Socket socket = new Socket(host, port);
BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
PrintWriter writer = new PrintWriter(socket.getOutputStream(), true);
// server's greeting
String initreply = readAll(socket, "\r\n");
System.out.println(initreply);
// log me in
String login_cmd = "A1 LOGIN user pass\r\n";
writer.print(login_cmd);
writer.flush();
String loginreply = readAll(socket, "\r\n");
System.out.println(loginreply);
}
}
Oy,您每次阅读时都会创建新的BufferedReaders。每个缓冲读取器可能会预读,然后将其扔掉。 – Max