+++ /dev/null
-/*
- * Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
- *
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Public License v. 2.0, which is available at
- * http://www.eclipse.org/legal/epl-2.0.
- *
- * This Source Code may also be made available under the following Secondary
- * Licenses when the conditions for such availability set forth in the
- * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
- * version 2 with the GNU Classpath Exception, which is available at
- * https://www.gnu.org/software/classpath/license.html.
- *
- * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
- */
-
-package com.sun.mail.mbox;
-
-import java.io.*;
-
-/**
- * Update the Content-Length header in the message written to the stream.
- */
-class ContentLengthUpdater extends FilterOutputStream {
- private String contentLength;
- private boolean inHeader = true;
- private boolean sawContentLength = false;
- private int lastb1 = -1, lastb2 = -1;
- private StringBuilder line = new StringBuilder();
-
- public ContentLengthUpdater(OutputStream os, long contentLength) {
- super(os);
- this.contentLength = "Content-Length: " + contentLength;
- }
-
- public void write(int b) throws IOException {
- if (inHeader) {
- String eol = "\n";
- // First, determine if we're still in the header.
- if (b == '\r') {
- // if line terminator is CR
- if (lastb1 == '\r') {
- inHeader = false;
- eol = "\r";
- // else, if line terminator is CRLF
- } else if (lastb1 == '\n' && lastb2 == '\r') {
- inHeader = false;
- eol = "\r\n";
- }
- // else, if line terminator is \n
- } else if (b == '\n') {
- if (lastb1 == '\n') {
- inHeader = false;
- eol = "\n";
- }
- }
-
- // If we're no longer in the header, and we haven't seen
- // a Content-Length header yet, it's time to put one out.
- if (!inHeader && !sawContentLength) {
- out.write(contentLength.getBytes("iso-8859-1"));
- out.write(eol.getBytes("iso-8859-1"));
- }
-
- // If we have a full line, see if it's a Content-Length header.
- if (b == '\r' || (b == '\n' && lastb1 != '\r')) {
- if (line.toString().regionMatches(true, 0,
- "content-length:", 0, 15)) {
- // yup, got it
- sawContentLength = true;
- // put out the new version
- out.write(contentLength.getBytes("iso-8859-1"));
- } else {
- // not a Content-Length header, just write it out
- out.write(line.toString().getBytes("iso-8859-1"));
- }
- line.setLength(0); // clear buffer for next line
- }
- if (b == '\r' || b == '\n')
- out.write(b); // write out line terminator immediately
- else
- line.append((char)b); // accumulate characters of the line
-
- // rotate saved characters for next time through loop
- lastb2 = lastb1;
- lastb1 = b;
- } else
- out.write(b); // not in the header, just write it out
- }
-
- public void write(byte[] b) throws IOException {
- if (inHeader)
- write(b, 0, b.length);
- else
- out.write(b);
- }
-
- public void write(byte[] b, int off, int len) throws IOException {
- if (inHeader) {
- for (int i = 0 ; i < len ; i++) {
- write(b[off + i]);
- }
- } else
- out.write(b, off, len);
- }
-
- // for testing
- public static void main(String argv[]) throws Exception {
- int b;
- ContentLengthUpdater os =
- new ContentLengthUpdater(System.out, Long.parseLong(argv[0]));
- while ((b = System.in.read()) >= 0)
- os.write(b);
- os.flush();
- }
-}