| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.emailcommon.utility; |
| |
| import com.android.emailcommon.Logging; |
| import com.android.mail.utils.LogUtils; |
| |
| import java.io.FilterInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| /** |
| * Simple class used for debugging only that affords us a view of the raw IMAP or POP3 stream, |
| * in addition to the tokenized version. |
| * |
| * Use of this class *MUST* be restricted to logging-enabled situations only. |
| */ |
| public class LoggingInputStream extends FilterInputStream { |
| private StringBuilder mSb; |
| private boolean mDumpEmptyLines; |
| private final String mTag; |
| |
| public LoggingInputStream(InputStream in) { |
| this(in, "RAW", false); |
| } |
| |
| public LoggingInputStream(InputStream in, String tag, boolean dumpEmptyLines) { |
| super(in); |
| mTag = tag + " "; |
| mDumpEmptyLines = dumpEmptyLines; |
| initBuffer(); |
| LogUtils.d(Logging.LOG_TAG, mTag + "dump start"); |
| } |
| |
| private void initBuffer() { |
| mSb = new StringBuilder(mTag); |
| } |
| |
| /** |
| * Collect chars as read, and log them when EOL reached. |
| */ |
| @Override |
| public int read() throws IOException { |
| int oneByte = super.read(); |
| logRaw(oneByte); |
| return oneByte; |
| } |
| |
| /** |
| * Collect chars as read, and log them when EOL reached. |
| */ |
| @Override |
| public int read(byte[] b, int offset, int length) throws IOException { |
| int bytesRead = super.read(b, offset, length); |
| int copyBytes = bytesRead; |
| while (copyBytes > 0) { |
| logRaw(b[offset] & 0xFF); |
| copyBytes--; |
| offset++; |
| } |
| |
| return bytesRead; |
| } |
| |
| /** |
| * Write and clear the buffer |
| */ |
| private void logRaw(int oneByte) { |
| if (oneByte == '\r') { |
| // Don't log. |
| } else if (oneByte == '\n') { |
| flushLog(); |
| } else if (0x20 <= oneByte && oneByte <= 0x7e) { // Printable ASCII. |
| mSb.append((char)oneByte); |
| } else { |
| // email protocols are supposed to be all 7bits, but there are wrong implementations |
| // that do send 8 bit characters... |
| mSb.append("\\x" + Utility.byteToHex(oneByte)); |
| } |
| } |
| |
| private void flushLog() { |
| if (mDumpEmptyLines || (mSb.length() > mTag.length())) { |
| LogUtils.d(Logging.LOG_TAG, mSb.toString()); |
| initBuffer(); |
| } |
| } |
| |
| @Override |
| public void close() throws IOException { |
| super.close(); |
| flushLog(); |
| } |
| } |