| Clover coverage report - Maven Clover report |
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| Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
| MIMEOutputStream.java | 0% | 0% | 0% | 0% |
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| 1 | /** | |
| 2 | * | |
| 3 | * Copyright 2006 The Apache Software Foundation | |
| 4 | * | |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 6 | * you may not use this file except in compliance with the License. | |
| 7 | * You may obtain a copy of the License at | |
| 8 | * | |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 10 | * | |
| 11 | * Unless required by applicable law or agreed to in writing, software | |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, | |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 14 | * See the License for the specific language governing permissions and | |
| 15 | * limitations under the License. | |
| 16 | */ | |
| 17 | ||
| 18 | package org.apache.geronimo.javamail.util; | |
| 19 | ||
| 20 | import java.io.IOException; | |
| 21 | import java.io.OutputStream; | |
| 22 | ||
| 23 | /** | |
| 24 | * An implementation of an OutputStream that performs MIME linebreak | |
| 25 | * canonicalization and "byte-stuff" so that data content does not get mistaken | |
| 26 | * for a message data-end marker (CRLF.CRLF)l | |
| 27 | * | |
| 28 | * @version $Rev: 432884 $ $Date: 2006-08-19 14:53:20 -0700 (Sat, 19 Aug 2006) $ | |
| 29 | */ | |
| 30 | public class MIMEOutputStream extends OutputStream { | |
| 31 | ||
| 32 | // the wrappered output stream. | |
| 33 | protected OutputStream out; | |
| 34 | ||
| 35 | // last character we handled...used to recongnize line breaks. | |
| 36 | protected int lastWrite = -1; | |
| 37 | ||
| 38 | // a flag to indicate we've just processed a line break. This is used for | |
| 39 | // byte stuffing purposes. This | |
| 40 | // is initially true, because if the first character of the content is a | |
| 41 | // period, we need to byte-stuff | |
| 42 | // immediately. | |
| 43 | protected boolean atLineBreak = true; | |
| 44 | ||
| 45 | /** | |
| 46 | * Create an output stream that writes to the target output stream. | |
| 47 | * | |
| 48 | * @param out | |
| 49 | * The wrapped output stream. | |
| 50 | */ | |
| 51 | 0 | public MIMEOutputStream(OutputStream out) { |
| 52 | 0 | this.out = out; |
| 53 | } | |
| 54 | ||
| 55 | // in order for this to work, we only need override the single character | |
| 56 | // form, as the others | |
| 57 | // funnel through this one by default. | |
| 58 | 0 | public void write(int ch) throws IOException { |
| 59 | // if this is a CR character, always write out a full sequence, and | |
| 60 | // remember that we just did this. | |
| 61 | 0 | if (ch == '\r') { |
| 62 | 0 | out.write((byte) '\r'); |
| 63 | 0 | out.write((byte) '\n'); |
| 64 | // we've just taken a break; | |
| 65 | 0 | atLineBreak = true; |
| 66 | } | |
| 67 | // if this is a new line, then we need to determine if this is a loner | |
| 68 | // or part of a CRLF sequence. | |
| 69 | 0 | else if (ch == '\n') { |
| 70 | // is this a lone ranger? | |
| 71 | 0 | if (lastWrite != '\r') { |
| 72 | // write the full CRLF sequence. | |
| 73 | 0 | out.write((byte) '\r'); |
| 74 | 0 | out.write((byte) '\n'); |
| 75 | } | |
| 76 | // regardless of whether we wrote something or not, we're still at a | |
| 77 | // line break. | |
| 78 | 0 | atLineBreak = true; |
| 79 | } | |
| 80 | // potential byte-stuffing situation? | |
| 81 | 0 | else if (ch == '.') { |
| 82 | // ok, this is a potential stuff situation. Did we just have a line | |
| 83 | // break? Double up the character. | |
| 84 | 0 | if (atLineBreak) { |
| 85 | 0 | out.write('.'); |
| 86 | } | |
| 87 | 0 | out.write('.'); |
| 88 | 0 | atLineBreak = false; |
| 89 | } else { | |
| 90 | // just write this out and flip the linebreak flag. | |
| 91 | 0 | out.write(ch); |
| 92 | 0 | atLineBreak = false; |
| 93 | } | |
| 94 | // remember this last one for CRLF tracking purposes. | |
| 95 | 0 | lastWrite = ch; |
| 96 | } | |
| 97 | } |
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