package com.fsck.k9.mail.store;
import android.util.Log;
import com.fsck.k9.Account;
import com.fsck.k9.K9;
import com.fsck.k9.controller.MessageRetrievalListener;
import com.fsck.k9.helper.Utility;
import com.fsck.k9.mail.*;
import com.fsck.k9.mail.Folder.OpenMode;
import com.fsck.k9.mail.internet.MimeMessage;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLException;
import javax.net.ssl.TrustManager;
import java.io.*;
import java.net.*;
import java.security.GeneralSecurityException;
import java.security.SecureRandom;
import java.util.ArrayList;
import java.util.Date;
import java.util.LinkedList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
public class Pop3Store extends Store
{
public static final int CONNECTION_SECURITY_NONE = 0;
public static final int CONNECTION_SECURITY_TLS_OPTIONAL = 1;
public static final int CONNECTION_SECURITY_TLS_REQUIRED = 2;
public static final int CONNECTION_SECURITY_SSL_REQUIRED = 3;
public static final int CONNECTION_SECURITY_SSL_OPTIONAL = 4;
private static final Flag[] PERMANENT_FLAGS = { Flag.DELETED };
private String mHost;
private int mPort;
private String mUsername;
private String mPassword;
private int mConnectionSecurity;
private HashMap<String, Folder> mFolders = new HashMap<String, Folder>();
private Pop3Capabilities mCapabilities;
// /**
// * Detected latency, used for usage scaling.
// * Usage scaling occurs when it is neccesary to get information about
// * messages that could result in large data loads. This value allows
// * the code that loads this data to decide between using large downloads
// * (high latency) or multiple round trips (low latency) to accomplish
// * the same thing.
// * Default is Integer.MAX_VALUE implying massive latency so that the large
// * download method is used by default until latency data is collected.
// */
// private int mLatencyMs = Integer.MAX_VALUE;
//
// /**
// * Detected throughput, used for usage scaling.
// * Usage scaling occurs when it is neccesary to get information about
// * messages that could result in large data loads. This value allows
// * the code that loads this data to decide between using large downloads
// * (high latency) or multiple round trips (low latency) to accomplish
// * the same thing.
// * Default is Integer.MAX_VALUE implying massive bandwidth so that the
// * large download method is used by default until latency data is
// * collected.
// */
// private int mThroughputKbS = Integer.MAX_VALUE;
/**
* pop3://user:password@server:port CONNECTION_SECURITY_NONE
* pop3+tls://user:password@server:port CONNECTION_SECURITY_TLS_OPTIONAL
* pop3+tls+://user:password@server:port CONNECTION_SECURITY_TLS_REQUIRED
* pop3+ssl+://user:password@server:port CONNECTION_SECURITY_SSL_REQUIRED
* pop3+ssl://user:password@server:port CONNECTION_SECURITY_SSL_OPTIONAL
*/
public Pop3Store(Account account) throws MessagingException
{
super(account);
URI uri;
try
{
uri = new URI(mAccount.getStoreUri());
}
catch (URISyntaxException use)
{
throw new MessagingException("Invalid Pop3Store URI", use);
}
String scheme = uri.getScheme();
if (scheme.equals("pop3"))
{
mConnectionSecurity = CONNECTION_SECURITY_NONE;
mPort = 110;
}
else if (scheme.equals("pop3+tls"))
{
mConnectionSecurity = CONNECTION_SECURITY_TLS_OPTIONAL;
mPort = 110;
}
else if (scheme.equals("pop3+tls+"))
{
mConnectionSecurity = CONNECTION_SECURITY_TLS_REQUIRED;
mPort = 110;
}
else if (scheme.equals("pop3+ssl+"))
{
mConnectionSecurity = CONNECTION_SECURITY_SSL_REQUIRED;
mPort = 995;
}
else if (scheme.equals("pop3+ssl"))
{
mConnectionSecurity = CONNECTION_SECURITY_SSL_OPTIONAL;
mPort = 995;
}
else
{
throw new MessagingException("Unsupported protocol");
}
mHost = uri.getHost();
if (uri.getPort() != -1)
{
mPort = uri.getPort();
}
if (uri.getUserInfo() != null)
{
try
{
String[] userInfoParts = uri.getUserInfo().split(":");
mUsername = URLDecoder.decode(userInfoParts[0], "UTF-8");
if (userInfoParts.length > 1)
{
mPassword = URLDecoder.decode(userInfoParts[1], "UTF-8");
}
}
catch (UnsupportedEncodingException enc)
{
// This shouldn't happen since the encoding is hardcoded to UTF-8
Log.e(K9.LOG_TAG, "Couldn't urldecode username or password.", enc);
}
}
}
@Override
public Folder getFolder(String name)
{
Folder folder = mFolders.get(name);
if (folder == null)
{
folder = new Pop3Folder(name);
mFolders.put(folder.getName(), folder);
}
return folder;
}
@Override
public List<? extends Folder> getPersonalNamespaces(boolean forceListAll) throws MessagingException
{
List<Folder> folders = new LinkedList<Folder>();
folders.add(getFolder("INBOX"));
return folders;
}
@Override
public void checkSettings() throws MessagingException
{
Pop3Folder folder = new Pop3Folder("INBOX");
folder.open(OpenMode.READ_WRITE);
if (!mCapabilities.uidl)
{
/*
* Run an additional test to see if UIDL is supported on the server. If it's not we
* can't service this account.
*/
/*
* If the server doesn't support UIDL it will return a - response, which causes
* executeSimpleCommand to throw a MessagingException, exiting this method.
*/
folder.executeSimpleCommand("UIDL");
}
folder.close();
}
class Pop3Folder extends Folder
{
private Socket mSocket;
private InputStream mIn;
private OutputStream mOut;
private HashMap<String, Pop3Message> mUidToMsgMap = new HashMap<String, Pop3Message>();
private HashMap<Integer, Pop3Message> mMsgNumToMsgMap = new HashMap<Integer, Pop3Message>();
private HashMap<String, Integer> mUidToMsgNumMap = new HashMap<String, Integer>();
private String mName;
private int mMessageCount;
public Pop3Folder(String name)
{
super(Pop3Store.this.mAccount);
this.mName = name;
if (mName.equalsIgnoreCase("INBOX"))
{
mName = "INBOX";
}
}
@Override
public synchronized void open(OpenMode mode) throws MessagingException
{
if (isOpen())
{
return;
}
if (!mName.equalsIgnoreCase("INBOX"))
{
throw new MessagingException("Folder does not exist");
}
try
{
SocketAddress socketAddress = new InetSocketAddress(mHost, mPort);
if (mConnectionSecurity == CONNECTION_SECURITY_SSL_REQUIRED ||
mConnectionSecurity == CONNECTION_SECURITY_SSL_OPTIONAL)
{
SSLContext sslContext = SSLContext.getInstance("TLS");
final boolean secure = mConnectionSecurity == CONNECTION_SECURITY_SSL_REQUIRED;
sslContext.init(null, new TrustManager[]
{
TrustManagerFactory.get(mHost, secure)
}, new SecureRandom());
mSocket = sslContext.getSocketFactory().createSocket();
mSocket.connect(socketAddress, SOCKET_CONNECT_TIMEOUT);
mIn = new BufferedInputStream(mSocket.getInputStream(), 1024);
mOut = new BufferedOutputStream(mSocket.getOutputStream(), 512);
}
else
{
mSocket = new Socket();
mSocket.connect(socketAddress, SOCKET_CONNECT_TIMEOUT);
mIn = new BufferedInputStream(mSocket.getInputStream(), 1024);
mOut = new BufferedOutputStream(mSocket.getOutputStream(), 512);
}
mSocket.setSoTimeout(Store.SOCKET_READ_TIMEOUT);
if (!isOpen())
{
throw new MessagingException("Unable to connect socket");
}
// Eat the banner
executeSimpleCommand(null);
if (mConnectionSecurity == CONNECTION_SECURITY_TLS_OPTIONAL
|| mConnectionSecurity == CONNECTION_SECURITY_TLS_REQUIRED)
{
mCapabilities = getCapabilities();
if (mCapabilities.stls)
{
writeLine("STLS");
SSLContext sslContext = SSLContext.getInstance("TLS");
boolean secure = mConnectionSecurity == CONNECTION_SECURITY_TLS_REQUIRED;
sslContext.init(null, new TrustManager[]
{
TrustManagerFactory.get(mHost, secure)
}, new SecureRandom());
mSocket = sslContext.getSocketFactory().createSocket(mSocket, mHost, mPort,
true);
mSocket.setSoTimeout(Store.SOCKET_READ_TIMEOUT);
mIn = new BufferedInputStream(mSocket.getInputStream(), 1024);
mOut = new BufferedOutputStream(mSocket.getOutputStream(), 512);
if (!isOpen())
{
throw new MessagingException("Unable to connect socket");
}
}
else if (mConnectionSecurity == CONNECTION_SECURITY_TLS_REQUIRED)
{
throw new MessagingException("TLS not supported but required");
}
}
try
{
executeSimpleCommand("USER " + mUsername);
executeSimpleCommand("PASS " + mPassword, true);
}
catch (MessagingException me)
{
throw new AuthenticationFailedException(null, me);
}
mCapabilities = getCapabilities();
}
catch (SSLException e)
{
throw new CertificateValidationException(e.getMessage(), e);
}
catch (GeneralSecurityException gse)
{
throw new MessagingException(
"Unable to open connection to POP server due to security error.", gse);
}
catch (IOException ioe)
{
throw new MessagingException("Unable to open connection to POP server.", ioe);
}
String response = executeSimpleCommand("STAT");
String[] parts = response.split(" ");
mMessageCount = Integer.parseInt(parts[1]);
mUidToMsgMap.clear();
mMsgNumToMsgMap.clear();
mUidToMsgNumMap.clear();
}
@Override
public boolean isOpen()
{
return (mIn != null && mOut != null && mSocket != null
&& mSocket.isConnected() && !mSocket.isClosed());
}
@Override
public OpenMode getMode()
{
return OpenMode.READ_WRITE;
}
@Override
public void close()
{
try
{
executeSimpleCommand("QUIT");
}
catch (Exception e)
{
/*
* QUIT may fail if the connection is already closed. We don't care. It's just
* being friendly.
*/
}
closeIO();
}
private void closeIO()
{
try
{
mIn.close();
}
catch (Exception e)
{
/*
* May fail if the connection is already closed.
*/
}
try
{
mOut.close();
}
catch (Exception e)
{
/*
* May fail if the connection is already closed.
*/
}
try
{
mSocket.close();
}
catch (Exception e)
{
/*
* May fail if the connection is already closed.
*/
}
mIn = null;
mOut = null;
mSocket = null;
}
@Override
public String getName()
{
return mName;
}
@Override
public boolean create(FolderType type) throws MessagingException
{
return false;
}
@Override
public boolean exists() throws MessagingException
{
return mName.equalsIgnoreCase("INBOX");
}
@Override
public int getMessageCount()
{
return mMessageCount;
}
@Override
public int getUnreadMessageCount() throws MessagingException
{
return -1;
}
@Override
public int getFlaggedMessageCount() throws MessagingException
{
return -1;
}
@Override
public Message getMessage(String uid) throws MessagingException
{
Pop3Message message = mUidToMsgMap.get(uid);
if (message == null)
{
message = new Pop3Message(uid, this);
}
return message;
}
@Override
public Message[] getMessages(int start, int end, Date earliestDate, MessageRetrievalListener listener)
throws MessagingException
{
if (start < 1 || end < 1 || end < start)
{
throw new MessagingException(String.format("Invalid message set %d %d",
start, end));
}
try
{
indexMsgNums(start, end);
}
catch (IOException ioe)
{
throw new MessagingException("getMessages", ioe);
}
ArrayList<Message> messages = new ArrayList<Message>();
int i = 0;
for (int msgNum = start; msgNum <= end; msgNum++)
{
Pop3Message message = mMsgNumToMsgMap.get(msgNum);
if (message == null)
{
/*
* There could be gaps in the message numbers or malformed
* responses which lead to "gaps" in mMsgNumToMsgMap.
*
* See issue 2252
*/
continue;
}
if (listener != null)
{
listener.messageStarted(message.getUid(), i++, (end - start) + 1);
}
messages.add(message);
if (listener != null)
{
listener.messageFinished(message, i++, (end - start) + 1);
}
}
return messages.toArray(new Message[messages.size()]);
}
/**
* Ensures that the given message set (from start to end inclusive)
* has been queried so that uids are available in the local cache.
* @param start
* @param end
* @throws MessagingException
* @throws IOException
*/
private void indexMsgNums(int start, int end)
throws MessagingException, IOException
{
int unindexedMessageCount = 0;
for (int msgNum = start; msgNum <= end; msgNum++)
{
if (mMsgNumToMsgMap.get(msgNum) == null)
{
unindexedMessageCount++;
}
}
if (unindexedMessageCount == 0)
{
return;
}
if (unindexedMessageCount < 50 && mMessageCount > 5000)
{
/*
* In extreme cases we'll do a UIDL command per message instead of a bulk
* download.
*/
for (int msgNum = start; msgNum <= end; msgNum++)
{
Pop3Message message = mMsgNumToMsgMap.get(msgNum);
if (message == null)
{
String response = executeSimpleCommand("UIDL " + msgNum);
int uidIndex = response.lastIndexOf(' ');
String msgUid = response.substring(uidIndex + 1);
message = new Pop3Message(msgUid, this);
indexMessage(msgNum, message);
}
}
}
else
{
String response = executeSimpleCommand("UIDL");
while ((response = readLine()) != null)
{
if (response.equals("."))
{
break;
}
String[] uidParts = response.split(" ");
if ((uidParts.length >= 3) && "+OK".equals(uidParts[0]))
{
/*
* At least one server software places a "+OK" in
* front of every line in the unique-id listing.
*
* Fix up the array if we detected this behavior.
* See Issue 1237
*/
uidParts[0] = uidParts[1];
uidParts[1] = uidParts[2];
}
if (uidParts.length >= 2)
{
Integer msgNum = Integer.valueOf(uidParts[0]);
String msgUid = uidParts[1];
if (msgNum >= start && msgNum <= end)
{
Pop3Message message = mMsgNumToMsgMap.get(msgNum);
if (message == null)
{
message = new Pop3Message(msgUid, this);
indexMessage(msgNum, message);
}
}
}
}
}
}
private void indexUids(ArrayList<String> uids)
throws MessagingException, IOException
{
HashSet<String> unindexedUids = new HashSet<String>();
for (String uid : uids)
{
if (mUidToMsgMap.get(uid) == null)
{
if (K9.DEBUG && K9.DEBUG_PROTOCOL_POP3)
{
Log.d(K9.LOG_TAG, "Need to index UID " + uid);
}
unindexedUids.add(uid);
}
}
if (unindexedUids.size() == 0)
{
return;
}
/*
* If we are missing uids in the cache the only sure way to
* get them is to do a full UIDL list. A possible optimization
* would be trying UIDL for the latest X messages and praying.
*/
String response = executeSimpleCommand("UIDL");
while ((response = readLine()) != null)
{
if (response.equals("."))
{
break;
}
String[] uidParts = response.split(" ");
// Ignore messages without a unique-id
if (uidParts.length >= 2)
{
Integer msgNum = Integer.valueOf(uidParts[0]);
String msgUid = uidParts[1];
if (unindexedUids.contains(msgUid))
{
if (K9.DEBUG && K9.DEBUG_PROTOCOL_POP3)
{
Log.d(K9.LOG_TAG, "Got msgNum " + msgNum + " for UID " + msgUid);
}
Pop3Message message = mUidToMsgMap.get(msgUid);
if (message == null)
{
message = new Pop3Message(msgUid, this);
}
indexMessage(msgNum, message);
}
}
}
}
private void indexMessage(int msgNum, Pop3Message message)
{
if (K9.DEBUG && K9.DEBUG_PROTOCOL_POP3)
{
Log.d(K9.LOG_TAG, "Adding index for UID " + message.getUid() + " to msgNum " + msgNum);
}
mMsgNumToMsgMap.put(msgNum, message);
mUidToMsgMap.put(message.getUid(), message);
mUidToMsgNumMap.put(message.getUid(), msgNum);
}
@Override
public Message[] getMessages(MessageRetrievalListener listener) throws MessagingException
{
throw new UnsupportedOperationException("Pop3: No getMessages");
}
@Override
public Message[] getMessages(String[] uids, MessageRetrievalListener listener)
throws MessagingException
{
throw new UnsupportedOperationException("Pop3: No getMessages by uids");
}
/**
* Fetch the items contained in the FetchProfile into the given set of
* Messages in as efficient a manner as possible.
* @param messages
* @param fp
* @throws MessagingException
*/
@Override
public void fetch(Message[] messages, FetchProfile fp, MessageRetrievalListener listener)
throws MessagingException
{
if (messages == null || messages.length == 0)
{
return;
}
ArrayList<String> uids = new ArrayList<String>();
for (Message message : messages)
{
uids.add(message.getUid());
}
try
{
indexUids(uids);
}
catch (IOException ioe)
{
throw new MessagingException("fetch", ioe);
}
try
{
if (fp.contains(FetchProfile.Item.ENVELOPE))
{
/*
* We pass the listener only if there are other things to do in the
* FetchProfile. Since fetchEnvelop works in bulk and eveything else
* works one at a time if we let fetchEnvelope send events the
* event would get sent twice.
*/
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,
(mAccount.getMaximumAutoDownloadMessageSize() / 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) && fp.size() == 1))
{
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));
if (lines == -1 || !mCapabilities.top)
{
message.setFlag(Flag.X_DOWNLOADED_FULL, true);
}
}
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()
{
return PERMANENT_FLAGS;
}
@Override
public void appendMessages(Message[] messages) throws MessagingException
{
}
@Override
public void delete(boolean recurse) throws MessagingException
{
}
@Override
public void delete(Message[] msgs, String trashFolderName) throws MessagingException
{
setFlags(msgs, new Flag[] { Flag.DELETED }, true);
}
@Override
public String getUidFromMessageId(Message message) throws MessagingException
{
return null;
}
@Override
public void setFlags(Flag[] flags, boolean value)
throws MessagingException
{
Message[] messages = getMessages(null);
setFlags(messages, flags, value);
}
@Override
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;
}
ArrayList<String> uids = new ArrayList<String>();
try
{
for (Message message : messages)
{
uids.add(message.getUid());
}
indexUids(uids);
}
catch (IOException ioe)
{
throw new MessagingException("Could not get message number for uid " + uids, ioe);
}
for (Message message : messages)
{
Integer msgNum = mUidToMsgNumMap.get(message.getUid());
if (msgNum == null)
{
MessagingException me = new MessagingException("Could not delete message " + message.getUid()
+ " because no msgNum found; permanent error");
me.setPermanentFailure(true);
throw me;
}
executeSimpleCommand(String.format("DELE %s", msgNum));
}
}
// 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 (K9.DEBUG && K9.DEBUG_PROTOCOL_POP3)
{
Log.d(K9.LOG_TAG, "<<< " + ret);
}
return ret;
}
private void writeLine(String s) throws IOException
{
mOut.write(s.getBytes());
mOut.write('\r');
mOut.write('\n');
mOut.flush();
}
private Pop3Capabilities getCapabilities() throws IOException
{
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 MessagingException
{
return executeSimpleCommand(command, false);
}
private String executeSimpleCommand(String command, boolean sensitive) throws MessagingException
{
try
{
open(OpenMode.READ_WRITE);
if (command != null)
{
if (K9.DEBUG && K9.DEBUG_PROTOCOL_POP3)
{
if (sensitive && !K9.DEBUG_SENSITIVE)
{
Log.d(K9.LOG_TAG, ">>> "
+ "[Command Hidden, Enable Sensitive Debug Logging To Show]");
}
else
{
Log.d(K9.LOG_TAG, ">>> " + command);
}
}
writeLine(command);
}
String response = readLine();
if (response.length() > 1 && response.charAt(0) == '-')
{
throw new MessagingException(response);
}
return response;
}
catch (MessagingException me)
{
throw me;
}
catch (Exception e)
{
closeIO();
throw new MessagingException("Unable to execute POP3 command", e);
}
}
@Override
public boolean supportsFetchingFlags()
{
return false;
}//isFlagSupported
@Override
public boolean equals(Object o)
{
if (o instanceof Pop3Folder)
{
return ((Pop3Folder) o).mName.equals(mName);
}
return super.equals(o);
}
@Override
public int hashCode()
{
return mName.hashCode();
}
}//Pop3Folder
static class Pop3Message extends MimeMessage
{
public Pop3Message(String uid, Pop3Folder folder)
{
mUid = uid;
mFolder = folder;
mSize = -1;
}
public void setSize(int size)
{
mSize = size;
}
@Override
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);
}
@Override
public void delete(String trashFolderName) throws MessagingException
{
// try
// {
// Poor POP3 users, we can't copy the message to the Trash folder, but they still want a delete
setFlag(Flag.DELETED, true);
// }
// catch (MessagingException me)
// {
// Log.w(K9.LOG_TAG, "Could not delete non-existant message", me);
// }
}
}
static class Pop3Capabilities
{
public boolean stls;
public boolean top;
public boolean user;
public boolean uidl;
public boolean pipelining;
@Override
public String toString()
{
return String.format("STLS %b, TOP %b, USER %b, UIDL %b, PIPELINING %b",
stls,
top,
user,
uidl,
pipelining);
}
}
static 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;
}
}
}