mirror of https://github.com/moparisthebest/k-9
881 lines
33 KiB
Java
881 lines
33 KiB
Java
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package com.android.email.mail.store;
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import java.io.BufferedInputStream;
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import java.io.BufferedOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.net.InetSocketAddress;
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import java.net.Socket;
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import java.net.SocketAddress;
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import java.net.URI;
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import java.net.URISyntaxException;
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import java.security.GeneralSecurityException;
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import java.security.SecureRandom;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.HashSet;
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import javax.net.ssl.SSLContext;
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import javax.net.ssl.TrustManager;
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import javax.net.ssl.SSLException;
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import android.util.Config;
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import android.util.Log;
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import com.android.email.Email;
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import com.android.email.Utility;
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import com.android.email.mail.AuthenticationFailedException;
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import com.android.email.mail.FetchProfile;
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import com.android.email.mail.Flag;
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import com.android.email.mail.Folder;
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import com.android.email.mail.Message;
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import com.android.email.mail.MessageRetrievalListener;
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import com.android.email.mail.MessagingException;
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import com.android.email.mail.Store;
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import com.android.email.mail.CertificateValidationException;
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import com.android.email.mail.Folder.OpenMode;
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import com.android.email.mail.internet.MimeMessage;
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public class Pop3Store extends Store {
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public static final int CONNECTION_SECURITY_NONE = 0;
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public static final int CONNECTION_SECURITY_TLS_OPTIONAL = 1;
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public static final int CONNECTION_SECURITY_TLS_REQUIRED = 2;
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public static final int CONNECTION_SECURITY_SSL_REQUIRED = 3;
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public static final int CONNECTION_SECURITY_SSL_OPTIONAL = 4;
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private static final Flag[] PERMANENT_FLAGS = { Flag.DELETED };
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private String mHost;
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private int mPort;
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private String mUsername;
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private String mPassword;
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private int mConnectionSecurity;
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private HashMap<String, Folder> mFolders = new HashMap<String, Folder>();
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private Pop3Capabilities mCapabilities;
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// /**
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// * Detected latency, used for usage scaling.
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// * Usage scaling occurs when it is neccesary to get information about
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// * messages that could result in large data loads. This value allows
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// * the code that loads this data to decide between using large downloads
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// * (high latency) or multiple round trips (low latency) to accomplish
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// * the same thing.
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// * Default is Integer.MAX_VALUE implying massive latency so that the large
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// * download method is used by default until latency data is collected.
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// */
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// private int mLatencyMs = Integer.MAX_VALUE;
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//
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// /**
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// * Detected throughput, used for usage scaling.
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// * Usage scaling occurs when it is neccesary to get information about
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// * messages that could result in large data loads. This value allows
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// * the code that loads this data to decide between using large downloads
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// * (high latency) or multiple round trips (low latency) to accomplish
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// * the same thing.
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// * Default is Integer.MAX_VALUE implying massive bandwidth so that the
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// * large download method is used by default until latency data is
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// * collected.
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// */
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// private int mThroughputKbS = Integer.MAX_VALUE;
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/**
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* pop3://user:password@server:port CONNECTION_SECURITY_NONE
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* pop3+tls://user:password@server:port CONNECTION_SECURITY_TLS_OPTIONAL
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* pop3+tls+://user:password@server:port CONNECTION_SECURITY_TLS_REQUIRED
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* pop3+ssl+://user:password@server:port CONNECTION_SECURITY_SSL_REQUIRED
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* pop3+ssl://user:password@server:port CONNECTION_SECURITY_SSL_OPTIONAL
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*
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* @param _uri
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*/
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public Pop3Store(String _uri) throws MessagingException {
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URI uri;
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try {
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uri = new URI(_uri);
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} catch (URISyntaxException use) {
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throw new MessagingException("Invalid Pop3Store URI", use);
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}
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String scheme = uri.getScheme();
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if (scheme.equals("pop3")) {
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mConnectionSecurity = CONNECTION_SECURITY_NONE;
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mPort = 110;
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} else if (scheme.equals("pop3+tls")) {
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mConnectionSecurity = CONNECTION_SECURITY_TLS_OPTIONAL;
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mPort = 110;
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} else if (scheme.equals("pop3+tls+")) {
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mConnectionSecurity = CONNECTION_SECURITY_TLS_REQUIRED;
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mPort = 110;
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} else if (scheme.equals("pop3+ssl+")) {
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mConnectionSecurity = CONNECTION_SECURITY_SSL_REQUIRED;
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mPort = 995;
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} else if (scheme.equals("pop3+ssl")) {
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mConnectionSecurity = CONNECTION_SECURITY_SSL_OPTIONAL;
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mPort = 995;
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} else {
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throw new MessagingException("Unsupported protocol");
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}
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mHost = uri.getHost();
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if (uri.getPort() != -1) {
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mPort = uri.getPort();
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}
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if (uri.getUserInfo() != null) {
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String[] userInfoParts = uri.getUserInfo().split(":", 2);
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mUsername = userInfoParts[0];
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if (userInfoParts.length > 1) {
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mPassword = userInfoParts[1];
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}
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}
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}
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@Override
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public Folder getFolder(String name) throws MessagingException {
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Folder folder = mFolders.get(name);
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if (folder == null) {
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folder = new Pop3Folder(name);
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mFolders.put(folder.getName(), folder);
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}
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return folder;
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}
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@Override
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public Folder[] getPersonalNamespaces() throws MessagingException {
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return new Folder[] {
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getFolder("INBOX"),
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};
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}
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@Override
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public void checkSettings() throws MessagingException {
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Pop3Folder folder = new Pop3Folder("INBOX");
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folder.open(OpenMode.READ_WRITE);
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if (!mCapabilities.uidl) {
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/*
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* Run an additional test to see if UIDL is supported on the server. If it's not we
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* can't service this account.
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*/
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try{
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/*
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* If the server doesn't support UIDL it will return a - response, which causes
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* executeSimpleCommand to throw a MessagingException, exiting this method.
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*/
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folder.executeSimpleCommand("UIDL");
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}
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catch (IOException ioe) {
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throw new MessagingException(null, ioe);
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}
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}
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folder.close(false);
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}
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class Pop3Folder extends Folder {
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private Socket mSocket;
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private InputStream mIn;
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private OutputStream mOut;
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private HashMap<String, Pop3Message> mUidToMsgMap = new HashMap<String, Pop3Message>();
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private HashMap<Integer, Pop3Message> mMsgNumToMsgMap = new HashMap<Integer, Pop3Message>();
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private HashMap<String, Integer> mUidToMsgNumMap = new HashMap<String, Integer>();
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private String mName;
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private int mMessageCount;
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public Pop3Folder(String name) {
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this.mName = name;
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if (mName.equalsIgnoreCase("INBOX")) {
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mName = "INBOX";
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}
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}
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@Override
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public synchronized void open(OpenMode mode) throws MessagingException {
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if (isOpen()) {
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return;
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}
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if (!mName.equalsIgnoreCase("INBOX")) {
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throw new MessagingException("Folder does not exist");
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}
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try {
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SocketAddress socketAddress = new InetSocketAddress(mHost, mPort);
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if (mConnectionSecurity == CONNECTION_SECURITY_SSL_REQUIRED ||
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mConnectionSecurity == CONNECTION_SECURITY_SSL_OPTIONAL) {
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SSLContext sslContext = SSLContext.getInstance("TLS");
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final boolean secure = mConnectionSecurity == CONNECTION_SECURITY_SSL_REQUIRED;
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sslContext.init(null, new TrustManager[] {
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TrustManagerFactory.get(mHost, secure)
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}, new SecureRandom());
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mSocket = sslContext.getSocketFactory().createSocket();
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mSocket.connect(socketAddress, SOCKET_CONNECT_TIMEOUT);
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mIn = new BufferedInputStream(mSocket.getInputStream(), 1024);
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mOut = new BufferedOutputStream(mSocket.getOutputStream(), 512);
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} else {
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mSocket = new Socket();
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mSocket.connect(socketAddress, SOCKET_CONNECT_TIMEOUT);
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mIn = new BufferedInputStream(mSocket.getInputStream(), 1024);
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mOut = new BufferedOutputStream(mSocket.getOutputStream(), 512);
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}
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mSocket.setSoTimeout(Store.SOCKET_READ_TIMEOUT);
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// Eat the banner
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executeSimpleCommand(null);
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mCapabilities = getCapabilities();
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if (mConnectionSecurity == CONNECTION_SECURITY_TLS_OPTIONAL
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|| mConnectionSecurity == CONNECTION_SECURITY_TLS_REQUIRED) {
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if (mCapabilities.stls) {
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writeLine("STLS");
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SSLContext sslContext = SSLContext.getInstance("TLS");
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boolean secure = mConnectionSecurity == CONNECTION_SECURITY_TLS_REQUIRED;
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sslContext.init(null, new TrustManager[] {
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TrustManagerFactory.get(mHost, secure)
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}, new SecureRandom());
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mSocket = sslContext.getSocketFactory().createSocket(mSocket, mHost, mPort,
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true);
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mSocket.setSoTimeout(Store.SOCKET_READ_TIMEOUT);
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mIn = new BufferedInputStream(mSocket.getInputStream(), 1024);
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mOut = new BufferedOutputStream(mSocket.getOutputStream(), 512);
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} else if (mConnectionSecurity == CONNECTION_SECURITY_TLS_REQUIRED) {
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throw new MessagingException("TLS not supported but required");
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}
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}
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try {
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executeSimpleCommand("USER " + mUsername);
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executeSimpleCommand("PASS " + mPassword);
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} catch (MessagingException me) {
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throw new AuthenticationFailedException(null, me);
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}
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} catch (SSLException e) {
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throw new CertificateValidationException(e.getMessage(), e);
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} catch (GeneralSecurityException gse) {
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throw new MessagingException(
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"Unable to open connection to POP server due to security error.", gse);
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} catch (IOException ioe) {
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throw new MessagingException("Unable to open connection to POP server.", ioe);
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}
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try {
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String response = executeSimpleCommand("STAT");
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String[] parts = response.split(" ");
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mMessageCount = Integer.parseInt(parts[1]);
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}
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catch (IOException ioe) {
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throw new MessagingException("Unable to STAT folder.", ioe);
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}
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mUidToMsgMap.clear();
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mMsgNumToMsgMap.clear();
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mUidToMsgNumMap.clear();
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}
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public boolean isOpen() {
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return (mIn != null && mOut != null && mSocket != null && mSocket.isConnected() && !mSocket
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.isClosed());
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}
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@Override
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public OpenMode getMode() throws MessagingException {
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return OpenMode.READ_ONLY;
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}
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@Override
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public void close(boolean expunge) {
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try {
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executeSimpleCommand("QUIT");
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}
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catch (Exception e) {
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/*
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* QUIT may fail if the connection is already closed. We don't care. It's just
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* being friendly.
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*/
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}
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try {
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mIn.close();
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} catch (Exception e) {
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/*
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* May fail if the connection is already closed.
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*/
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}
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try {
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mOut.close();
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} catch (Exception e) {
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/*
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* May fail if the connection is already closed.
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*/
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}
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try {
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mSocket.close();
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} catch (Exception e) {
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/*
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* May fail if the connection is already closed.
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*/
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}
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mIn = null;
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mOut = null;
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mSocket = null;
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}
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@Override
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public String getName() {
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return mName;
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}
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@Override
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public boolean create(FolderType type) throws MessagingException {
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return false;
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}
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@Override
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public boolean exists() throws MessagingException {
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return mName.equalsIgnoreCase("INBOX");
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}
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@Override
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public int getMessageCount() {
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return mMessageCount;
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}
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@Override
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public int getUnreadMessageCount() throws MessagingException {
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return -1;
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}
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@Override
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public Message getMessage(String uid) throws MessagingException {
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Pop3Message message = mUidToMsgMap.get(uid);
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if (message == null) {
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message = new Pop3Message(uid, this);
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}
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return message;
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}
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@Override
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public Message[] getMessages(int start, int end, MessageRetrievalListener listener)
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throws MessagingException {
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if (start < 1 || end < 1 || end < start) {
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throw new MessagingException(String.format("Invalid message set %d %d",
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start, end));
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}
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try {
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indexMsgNums(start, end);
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} catch (IOException ioe) {
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throw new MessagingException("getMessages", ioe);
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}
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ArrayList<Message> messages = new ArrayList<Message>();
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int i = 0;
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for (int msgNum = start; msgNum <= end; msgNum++) {
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Pop3Message message = mMsgNumToMsgMap.get(msgNum);
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if (listener != null) {
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listener.messageStarted(message.getUid(), i++, (end - start) + 1);
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}
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messages.add(message);
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if (listener != null) {
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listener.messageFinished(message, i++, (end - start) + 1);
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}
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}
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return messages.toArray(new Message[messages.size()]);
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}
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/**
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* Ensures that the given message set (from start to end inclusive)
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* has been queried so that uids are available in the local cache.
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* @param start
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* @param end
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* @throws MessagingException
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* @throws IOException
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*/
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private void indexMsgNums(int start, int end)
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throws MessagingException, IOException {
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int unindexedMessageCount = 0;
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for (int msgNum = start; msgNum <= end; msgNum++) {
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if (mMsgNumToMsgMap.get(msgNum) == null) {
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unindexedMessageCount++;
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}
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}
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if (unindexedMessageCount == 0) {
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return;
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}
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if (unindexedMessageCount < 50 && mMessageCount > 5000) {
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/*
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* In extreme cases we'll do a UIDL command per message instead of a bulk
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* download.
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*/
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for (int msgNum = start; msgNum <= end; msgNum++) {
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Pop3Message message = mMsgNumToMsgMap.get(msgNum);
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if (message == null) {
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String response = executeSimpleCommand("UIDL " + msgNum);
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int uidIndex = response.lastIndexOf(' ');
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String msgUid = response.substring(uidIndex + 1);
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message = new Pop3Message(msgUid, this);
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indexMessage(msgNum, message);
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}
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}
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}
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else {
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String response = executeSimpleCommand("UIDL");
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while ((response = readLine()) != null) {
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if (response.equals(".")) {
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break;
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}
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String[] uidParts = response.split(" ");
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Integer msgNum = Integer.valueOf(uidParts[0]);
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String msgUid = uidParts[1];
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if (msgNum >= start && msgNum <= end) {
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Pop3Message message = mMsgNumToMsgMap.get(msgNum);
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if (message == null) {
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message = new Pop3Message(msgUid, this);
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indexMessage(msgNum, message);
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}
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}
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}
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}
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}
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private void indexUids(ArrayList<String> uids)
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throws MessagingException, IOException {
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HashSet<String> unindexedUids = new HashSet<String>();
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for (String uid : uids) {
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if (mUidToMsgMap.get(uid) == null) {
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unindexedUids.add(uid);
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}
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}
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if (unindexedUids.size() == 0) {
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return;
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}
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/*
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* If we are missing uids in the cache the only sure way to
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* get them is to do a full UIDL list. A possible optimization
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* would be trying UIDL for the latest X messages and praying.
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*/
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String response = executeSimpleCommand("UIDL");
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while ((response = readLine()) != null) {
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if (response.equals(".")) {
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break;
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}
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String[] uidParts = response.split(" ");
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Integer msgNum = Integer.valueOf(uidParts[0]);
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String msgUid = uidParts[1];
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if (unindexedUids.contains(msgUid)) {
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if (Config.LOGD) {
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Pop3Message message = mUidToMsgMap.get(msgUid);
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if (message == null) {
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message = new Pop3Message(msgUid, this);
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}
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indexMessage(msgNum, message);
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}
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}
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}
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}
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private void indexMessage(int msgNum, Pop3Message message) {
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mMsgNumToMsgMap.put(msgNum, message);
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mUidToMsgMap.put(message.getUid(), message);
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mUidToMsgNumMap.put(message.getUid(), msgNum);
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}
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@Override
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public Message[] getMessages(MessageRetrievalListener listener) throws MessagingException {
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throw new UnsupportedOperationException("Pop3Folder.getMessage(MessageRetrievalListener)");
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}
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@Override
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public Message[] getMessages(String[] uids, MessageRetrievalListener listener)
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throws MessagingException {
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throw new UnsupportedOperationException("Pop3Folder.getMessage(MessageRetrievalListener)");
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}
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/**
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* Fetch the items contained in the FetchProfile into the given set of
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* Messages in as efficient a manner as possible.
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* @param messages
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* @param fp
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* @throws MessagingException
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*/
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public void fetch(Message[] messages, FetchProfile fp, MessageRetrievalListener listener)
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throws MessagingException {
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if (messages == null || messages.length == 0) {
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return;
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}
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ArrayList<String> uids = new ArrayList<String>();
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for (Message message : messages) {
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uids.add(message.getUid());
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}
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try {
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indexUids(uids);
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}
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catch (IOException ioe) {
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throw new MessagingException("fetch", ioe);
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}
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try {
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if (fp.contains(FetchProfile.Item.ENVELOPE)) {
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/*
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* We pass the listener only if there are other things to do in the
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* FetchProfile. Since fetchEnvelop works in bulk and eveything else
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* works one at a time if we let fetchEnvelope send events the
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* event would get sent twice.
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*/
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|
fetchEnvelope(messages, fp.size() == 1 ? listener : null);
|
|
}
|
|
}
|
|
catch (IOException ioe) {
|
|
throw new MessagingException("fetch", ioe);
|
|
}
|
|
for (int i = 0, count = messages.length; i < count; i++) {
|
|
Message message = messages[i];
|
|
if (!(message instanceof Pop3Message)) {
|
|
throw new MessagingException("Pop3Store.fetch called with non-Pop3 Message");
|
|
}
|
|
Pop3Message pop3Message = (Pop3Message)message;
|
|
try {
|
|
if (listener != null && !fp.contains(FetchProfile.Item.ENVELOPE)) {
|
|
listener.messageStarted(pop3Message.getUid(), i, count);
|
|
}
|
|
if (fp.contains(FetchProfile.Item.BODY)) {
|
|
fetchBody(pop3Message, -1);
|
|
}
|
|
else if (fp.contains(FetchProfile.Item.BODY_SANE)) {
|
|
/*
|
|
* To convert the suggested download size we take the size
|
|
* divided by the maximum line size (76).
|
|
*/
|
|
fetchBody(pop3Message,
|
|
FETCH_BODY_SANE_SUGGESTED_SIZE / 76);
|
|
}
|
|
else if (fp.contains(FetchProfile.Item.STRUCTURE)) {
|
|
/*
|
|
* If the user is requesting STRUCTURE we are required to set the body
|
|
* to null since we do not support the function.
|
|
*/
|
|
pop3Message.setBody(null);
|
|
}
|
|
if (listener != null && !fp.contains(FetchProfile.Item.ENVELOPE)) {
|
|
listener.messageFinished(message, i, count);
|
|
}
|
|
} catch (IOException ioe) {
|
|
throw new MessagingException("Unable to fetch message", ioe);
|
|
}
|
|
}
|
|
}
|
|
|
|
private void fetchEnvelope(Message[] messages,
|
|
MessageRetrievalListener listener) throws IOException, MessagingException {
|
|
int unsizedMessages = 0;
|
|
for (Message message : messages) {
|
|
if (message.getSize() == -1) {
|
|
unsizedMessages++;
|
|
}
|
|
}
|
|
if (unsizedMessages == 0) {
|
|
return;
|
|
}
|
|
if (unsizedMessages < 50 && mMessageCount > 5000) {
|
|
/*
|
|
* In extreme cases we'll do a command per message instead of a bulk request
|
|
* to hopefully save some time and bandwidth.
|
|
*/
|
|
for (int i = 0, count = messages.length; i < count; i++) {
|
|
Message message = messages[i];
|
|
if (!(message instanceof Pop3Message)) {
|
|
throw new MessagingException("Pop3Store.fetch called with non-Pop3 Message");
|
|
}
|
|
Pop3Message pop3Message = (Pop3Message)message;
|
|
if (listener != null) {
|
|
listener.messageStarted(pop3Message.getUid(), i, count);
|
|
}
|
|
String response = executeSimpleCommand(String.format("LIST %d",
|
|
mUidToMsgNumMap.get(pop3Message.getUid())));
|
|
String[] listParts = response.split(" ");
|
|
int msgNum = Integer.parseInt(listParts[1]);
|
|
int msgSize = Integer.parseInt(listParts[2]);
|
|
pop3Message.setSize(msgSize);
|
|
if (listener != null) {
|
|
listener.messageFinished(pop3Message, i, count);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
HashSet<String> msgUidIndex = new HashSet<String>();
|
|
for (Message message : messages) {
|
|
msgUidIndex.add(message.getUid());
|
|
}
|
|
int i = 0, count = messages.length;
|
|
String response = executeSimpleCommand("LIST");
|
|
while ((response = readLine()) != null) {
|
|
if (response.equals(".")) {
|
|
break;
|
|
}
|
|
String[] listParts = response.split(" ");
|
|
int msgNum = Integer.parseInt(listParts[0]);
|
|
int msgSize = Integer.parseInt(listParts[1]);
|
|
Pop3Message pop3Message = mMsgNumToMsgMap.get(msgNum);
|
|
if (pop3Message != null && msgUidIndex.contains(pop3Message.getUid())) {
|
|
if (listener != null) {
|
|
listener.messageStarted(pop3Message.getUid(), i, count);
|
|
}
|
|
pop3Message.setSize(msgSize);
|
|
if (listener != null) {
|
|
listener.messageFinished(pop3Message, i, count);
|
|
}
|
|
i++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Fetches the body of the given message, limiting the stored data
|
|
* to the specified number of lines. If lines is -1 the entire message
|
|
* is fetched. This is implemented with RETR for lines = -1 or TOP
|
|
* for any other value. If the server does not support TOP it is
|
|
* emulated with RETR and extra lines are thrown away.
|
|
* @param message
|
|
* @param lines
|
|
*/
|
|
private void fetchBody(Pop3Message message, int lines)
|
|
throws IOException, MessagingException {
|
|
String response = null;
|
|
if (lines == -1 || !mCapabilities.top) {
|
|
response = executeSimpleCommand(String.format("RETR %d",
|
|
mUidToMsgNumMap.get(message.getUid())));
|
|
}
|
|
else {
|
|
response = executeSimpleCommand(String.format("TOP %d %d",
|
|
mUidToMsgNumMap.get(message.getUid()),
|
|
lines));
|
|
}
|
|
if (response != null) {
|
|
try {
|
|
message.parse(new Pop3ResponseInputStream(mIn));
|
|
}
|
|
catch (MessagingException me) {
|
|
/*
|
|
* If we're only downloading headers it's possible
|
|
* we'll get a broken MIME message which we're not
|
|
* real worried about. If we've downloaded the body
|
|
* and can't parse it we need to let the user know.
|
|
*/
|
|
if (lines == -1) {
|
|
throw me;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Flag[] getPermanentFlags() throws MessagingException {
|
|
return PERMANENT_FLAGS;
|
|
}
|
|
|
|
public void appendMessages(Message[] messages) throws MessagingException {
|
|
}
|
|
|
|
public void delete(boolean recurse) throws MessagingException {
|
|
}
|
|
|
|
public Message[] expunge() throws MessagingException {
|
|
return null;
|
|
}
|
|
|
|
public void setFlags(Message[] messages, Flag[] flags, boolean value)
|
|
throws MessagingException {
|
|
if (!value || !Utility.arrayContains(flags, Flag.DELETED)) {
|
|
/*
|
|
* The only flagging we support is setting the Deleted flag.
|
|
*/
|
|
return;
|
|
}
|
|
try {
|
|
for (Message message : messages) {
|
|
executeSimpleCommand(String.format("DELE %s",
|
|
mUidToMsgNumMap.get(message.getUid())));
|
|
}
|
|
}
|
|
catch (IOException ioe) {
|
|
throw new MessagingException("setFlags()", ioe);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void copyMessages(Message[] msgs, Folder folder) throws MessagingException {
|
|
throw new UnsupportedOperationException("copyMessages is not supported in POP3");
|
|
}
|
|
|
|
// private boolean isRoundTripModeSuggested() {
|
|
// long roundTripMethodMs =
|
|
// (uncachedMessageCount * 2 * mLatencyMs);
|
|
// long bulkMethodMs =
|
|
// (mMessageCount * 58) / (mThroughputKbS * 1024 / 8) * 1000;
|
|
// }
|
|
|
|
private String readLine() throws IOException {
|
|
StringBuffer sb = new StringBuffer();
|
|
int d = mIn.read();
|
|
if (d == -1) {
|
|
throw new IOException("End of stream reached while trying to read line.");
|
|
}
|
|
do {
|
|
if (((char)d) == '\r') {
|
|
continue;
|
|
} else if (((char)d) == '\n') {
|
|
break;
|
|
} else {
|
|
sb.append((char)d);
|
|
}
|
|
} while ((d = mIn.read()) != -1);
|
|
String ret = sb.toString();
|
|
if (Config.LOGD) {
|
|
if (Email.DEBUG) {
|
|
Log.d(Email.LOG_TAG, "<<< " + ret);
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
private void writeLine(String s) throws IOException {
|
|
if (Config.LOGD) {
|
|
if (Email.DEBUG) {
|
|
Log.d(Email.LOG_TAG, ">>> " + s);
|
|
}
|
|
}
|
|
mOut.write(s.getBytes());
|
|
mOut.write('\r');
|
|
mOut.write('\n');
|
|
mOut.flush();
|
|
}
|
|
|
|
private Pop3Capabilities getCapabilities() throws IOException, MessagingException {
|
|
Pop3Capabilities capabilities = new Pop3Capabilities();
|
|
try {
|
|
String response = executeSimpleCommand("CAPA");
|
|
while ((response = readLine()) != null) {
|
|
if (response.equals(".")) {
|
|
break;
|
|
}
|
|
if (response.equalsIgnoreCase("STLS")){
|
|
capabilities.stls = true;
|
|
}
|
|
else if (response.equalsIgnoreCase("UIDL")) {
|
|
capabilities.uidl = true;
|
|
}
|
|
else if (response.equalsIgnoreCase("PIPELINING")) {
|
|
capabilities.pipelining = true;
|
|
}
|
|
else if (response.equalsIgnoreCase("USER")) {
|
|
capabilities.user = true;
|
|
}
|
|
else if (response.equalsIgnoreCase("TOP")) {
|
|
capabilities.top = true;
|
|
}
|
|
}
|
|
}
|
|
catch (MessagingException me) {
|
|
/*
|
|
* The server may not support the CAPA command, so we just eat this Exception
|
|
* and allow the empty capabilities object to be returned.
|
|
*/
|
|
}
|
|
return capabilities;
|
|
}
|
|
|
|
private String executeSimpleCommand(String command) throws IOException, MessagingException {
|
|
open(OpenMode.READ_WRITE);
|
|
|
|
if (command != null) {
|
|
writeLine(command);
|
|
}
|
|
|
|
String response = readLine();
|
|
|
|
if (response.length() > 1 && response.charAt(0) == '-') {
|
|
throw new MessagingException(response);
|
|
}
|
|
|
|
return response;
|
|
}
|
|
|
|
@Override
|
|
public boolean equals(Object o) {
|
|
if (o instanceof Pop3Folder) {
|
|
return ((Pop3Folder) o).mName.equals(mName);
|
|
}
|
|
return super.equals(o);
|
|
}
|
|
}
|
|
|
|
class Pop3Message extends MimeMessage {
|
|
public Pop3Message(String uid, Pop3Folder folder) throws MessagingException {
|
|
mUid = uid;
|
|
mFolder = folder;
|
|
mSize = -1;
|
|
}
|
|
|
|
public void setSize(int size) {
|
|
mSize = size;
|
|
}
|
|
|
|
protected void parse(InputStream in) throws IOException, MessagingException {
|
|
super.parse(in);
|
|
}
|
|
|
|
@Override
|
|
public void setFlag(Flag flag, boolean set) throws MessagingException {
|
|
super.setFlag(flag, set);
|
|
mFolder.setFlags(new Message[] { this }, new Flag[] { flag }, set);
|
|
}
|
|
}
|
|
|
|
class Pop3Capabilities {
|
|
public boolean stls;
|
|
public boolean top;
|
|
public boolean user;
|
|
public boolean uidl;
|
|
public boolean pipelining;
|
|
|
|
public String toString() {
|
|
return String.format("STLS %b, TOP %b, USER %b, UIDL %b, PIPELINING %b",
|
|
stls,
|
|
top,
|
|
user,
|
|
uidl,
|
|
pipelining);
|
|
}
|
|
}
|
|
|
|
class Pop3ResponseInputStream extends InputStream {
|
|
InputStream mIn;
|
|
boolean mStartOfLine = true;
|
|
boolean mFinished;
|
|
|
|
public Pop3ResponseInputStream(InputStream in) {
|
|
mIn = in;
|
|
}
|
|
|
|
@Override
|
|
public int read() throws IOException {
|
|
if (mFinished) {
|
|
return -1;
|
|
}
|
|
int d = mIn.read();
|
|
if (mStartOfLine && d == '.') {
|
|
d = mIn.read();
|
|
if (d == '\r') {
|
|
mFinished = true;
|
|
mIn.read();
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
mStartOfLine = (d == '\n');
|
|
|
|
return d;
|
|
}
|
|
}
|
|
}
|