diff options
Diffstat (limited to 'emailcommon/src/org/apache/james/mime4j/decoder/DecoderUtil.java')
| -rw-r--r-- | emailcommon/src/org/apache/james/mime4j/decoder/DecoderUtil.java | 279 |
1 files changed, 0 insertions, 279 deletions
diff --git a/emailcommon/src/org/apache/james/mime4j/decoder/DecoderUtil.java b/emailcommon/src/org/apache/james/mime4j/decoder/DecoderUtil.java deleted file mode 100644 index 551be0f57..000000000 --- a/emailcommon/src/org/apache/james/mime4j/decoder/DecoderUtil.java +++ /dev/null @@ -1,279 +0,0 @@ -/****************************************************************
- * Licensed to the Apache Software Foundation (ASF) under one *
- * or more contributor license agreements. See the NOTICE file *
- * distributed with this work for additional information *
- * regarding copyright ownership. The ASF licenses this file *
- * to you 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 org.apache.james.mime4j.decoder;
-
-//BEGIN android-changed: Stubbing out logging
-import org.apache.james.mime4j.Log;
-import org.apache.james.mime4j.LogFactory;
-//END android-changed
-import org.apache.james.mime4j.util.CharsetUtil;
-
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.UnsupportedEncodingException;
-
-/**
- * Static methods for decoding strings, byte arrays and encoded words.
- *
- *
- * @version $Id: DecoderUtil.java,v 1.3 2005/02/07 15:33:59 ntherning Exp $
- */
-public class DecoderUtil {
- private static Log log = LogFactory.getLog(DecoderUtil.class);
-
- /**
- * Decodes a string containing quoted-printable encoded data.
- *
- * @param s the string to decode.
- * @return the decoded bytes.
- */
- public static byte[] decodeBaseQuotedPrintable(String s) {
- ByteArrayOutputStream baos = new ByteArrayOutputStream();
-
- try {
- byte[] bytes = s.getBytes("US-ASCII");
-
- QuotedPrintableInputStream is = new QuotedPrintableInputStream(
- new ByteArrayInputStream(bytes));
-
- int b = 0;
- while ((b = is.read()) != -1) {
- baos.write(b);
- }
- } catch (IOException e) {
- /*
- * This should never happen!
- */
- log.error(e);
- }
-
- return baos.toByteArray();
- }
-
- /**
- * Decodes a string containing base64 encoded data.
- *
- * @param s the string to decode.
- * @return the decoded bytes.
- */
- public static byte[] decodeBase64(String s) {
- ByteArrayOutputStream baos = new ByteArrayOutputStream();
-
- try {
- byte[] bytes = s.getBytes("US-ASCII");
-
- Base64InputStream is = new Base64InputStream(
- new ByteArrayInputStream(bytes));
-
- int b = 0;
- while ((b = is.read()) != -1) {
- baos.write(b);
- }
- } catch (IOException e) {
- /*
- * This should never happen!
- */
- log.error(e);
- }
-
- return baos.toByteArray();
- }
-
- /**
- * Decodes an encoded word encoded with the 'B' encoding (described in
- * RFC 2047) found in a header field body.
- *
- * @param encodedWord the encoded word to decode.
- * @param charset the Java charset to use.
- * @return the decoded string.
- * @throws UnsupportedEncodingException if the given Java charset isn't
- * supported.
- */
- public static String decodeB(String encodedWord, String charset)
- throws UnsupportedEncodingException {
-
- return new String(decodeBase64(encodedWord), charset);
- }
-
- /**
- * Decodes an encoded word encoded with the 'Q' encoding (described in
- * RFC 2047) found in a header field body.
- *
- * @param encodedWord the encoded word to decode.
- * @param charset the Java charset to use.
- * @return the decoded string.
- * @throws UnsupportedEncodingException if the given Java charset isn't
- * supported.
- */
- public static String decodeQ(String encodedWord, String charset)
- throws UnsupportedEncodingException {
-
- /*
- * Replace _ with =20
- */
- StringBuffer sb = new StringBuffer();
- for (int i = 0; i < encodedWord.length(); i++) {
- char c = encodedWord.charAt(i);
- if (c == '_') {
- sb.append("=20");
- } else {
- sb.append(c);
- }
- }
-
- return new String(decodeBaseQuotedPrintable(sb.toString()), charset);
- }
-
- /**
- * Decodes a string containing encoded words as defined by RFC 2047.
- * Encoded words in have the form
- * =?charset?enc?Encoded word?= where enc is either 'Q' or 'q' for
- * quoted-printable and 'B' or 'b' for Base64.
- *
- * ANDROID: COPIED FROM A NEWER VERSION OF MIME4J
- *
- * @param body the string to decode.
- * @return the decoded string.
- */
- public static String decodeEncodedWords(String body) {
-
- // ANDROID: Most strings will not include "=?" so a quick test can prevent unneeded
- // object creation. This could also be handled via lazy creation of the StringBuilder.
- if (body.indexOf("=?") == -1) {
- return body;
- }
-
- int previousEnd = 0;
- boolean previousWasEncoded = false;
-
- StringBuilder sb = new StringBuilder();
-
- while (true) {
- int begin = body.indexOf("=?", previousEnd);
-
- // ANDROID: The mime4j original version has an error here. It gets confused if
- // the encoded string begins with an '=' (just after "?Q?"). This patch seeks forward
- // to find the two '?' in the "header", before looking for the final "?=".
- int endScan = begin + 2;
- if (begin != -1) {
- int qm1 = body.indexOf('?', endScan + 2);
- int qm2 = body.indexOf('?', qm1 + 1);
- if (qm2 != -1) {
- endScan = qm2 + 1;
- }
- }
-
- int end = begin == -1 ? -1 : body.indexOf("?=", endScan);
- if (end == -1) {
- if (previousEnd == 0)
- return body;
-
- sb.append(body.substring(previousEnd));
- return sb.toString();
- }
- end += 2;
-
- String sep = body.substring(previousEnd, begin);
-
- String decoded = decodeEncodedWord(body, begin, end);
- if (decoded == null) {
- sb.append(sep);
- sb.append(body.substring(begin, end));
- } else {
- if (!previousWasEncoded || !CharsetUtil.isWhitespace(sep)) {
- sb.append(sep);
- }
- sb.append(decoded);
- }
-
- previousEnd = end;
- previousWasEncoded = decoded != null;
- }
- }
-
- // return null on error
- private static String decodeEncodedWord(String body, int begin, int end) {
- int qm1 = body.indexOf('?', begin + 2);
- if (qm1 == end - 2)
- return null;
-
- int qm2 = body.indexOf('?', qm1 + 1);
- if (qm2 == end - 2)
- return null;
-
- String mimeCharset = body.substring(begin + 2, qm1);
- String encoding = body.substring(qm1 + 1, qm2);
- String encodedText = body.substring(qm2 + 1, end - 2);
-
- String charset = CharsetUtil.toJavaCharset(mimeCharset);
- if (charset == null) {
- if (log.isWarnEnabled()) {
- log.warn("MIME charset '" + mimeCharset + "' in encoded word '"
- + body.substring(begin, end) + "' doesn't have a "
- + "corresponding Java charset");
- }
- return null;
- } else if (!CharsetUtil.isDecodingSupported(charset)) {
- if (log.isWarnEnabled()) {
- log.warn("Current JDK doesn't support decoding of charset '"
- + charset + "' (MIME charset '" + mimeCharset
- + "' in encoded word '" + body.substring(begin, end)
- + "')");
- }
- return null;
- }
-
- if (encodedText.length() == 0) {
- if (log.isWarnEnabled()) {
- log.warn("Missing encoded text in encoded word: '"
- + body.substring(begin, end) + "'");
- }
- return null;
- }
-
- try {
- if (encoding.equalsIgnoreCase("Q")) {
- return DecoderUtil.decodeQ(encodedText, charset);
- } else if (encoding.equalsIgnoreCase("B")) {
- return DecoderUtil.decodeB(encodedText, charset);
- } else {
- if (log.isWarnEnabled()) {
- log.warn("Warning: Unknown encoding in encoded word '"
- + body.substring(begin, end) + "'");
- }
- return null;
- }
- } catch (UnsupportedEncodingException e) {
- // should not happen because of isDecodingSupported check above
- if (log.isWarnEnabled()) {
- log.warn("Unsupported encoding in encoded word '"
- + body.substring(begin, end) + "'", e);
- }
- return null;
- } catch (RuntimeException e) {
- if (log.isWarnEnabled()) {
- log.warn("Could not decode encoded word '"
- + body.substring(begin, end) + "'", e);
- }
- return null;
- }
- }
-}
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