| /* |
| * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.xml.internal.org.jvnet.mimepull; |
| |
| import java.io.IOException; |
| import java.util.NoSuchElementException; |
| import java.util.List; |
| |
| /** |
| * InternetHeaders is a utility class that manages RFC822 style |
| * headers. Given an RFC822 format message stream, it reads lines |
| * until the blank line that indicates end of header. The input stream |
| * is positioned at the start of the body. The lines are stored |
| * within the object and can be extracted as either Strings or |
| * {@link Header} objects. <p> |
| * <p/> |
| * This class is mostly intended for service providers. MimeMessage |
| * and MimeBody use this class for holding their headers. <p> |
| * <p/> |
| * <hr> <strong>A note on RFC822 and MIME headers</strong><p> |
| * <p/> |
| * RFC822 and MIME header fields <strong>must</strong> contain only |
| * US-ASCII characters. If a header contains non US-ASCII characters, |
| * it must be encoded as per the rules in RFC 2047. The MimeUtility |
| * class provided in this package can be used to to achieve this. |
| * Callers of the <code>setHeader</code>, <code>addHeader</code>, and |
| * <code>addHeaderLine</code> methods are responsible for enforcing |
| * the MIME requirements for the specified headers. In addition, these |
| * header fields must be folded (wrapped) before being sent if they |
| * exceed the line length limitation for the transport (1000 bytes for |
| * SMTP). Received headers may have been folded. The application is |
| * responsible for folding and unfolding headers as appropriate. <p> |
| * |
| * @author John Mani |
| * @author Bill Shannon |
| */ |
| final class InternetHeaders { |
| |
| private final FinalArrayList<Hdr> headers = new FinalArrayList<Hdr>(); |
| |
| /** |
| * Read and parse the given RFC822 message stream till the |
| * blank line separating the header from the body. Store the |
| * header lines inside this InternetHeaders object. <p> |
| * <p/> |
| * Note that the header lines are added into this InternetHeaders |
| * object, so any existing headers in this object will not be |
| * affected. |
| * |
| * @param lis RFC822 input stream |
| */ |
| InternetHeaders(MIMEParser.LineInputStream lis) { |
| // Read header lines until a blank line. It is valid |
| // to have BodyParts with no header lines. |
| String line; |
| String prevline = null; // the previous header line, as a string |
| // a buffer to accumulate the header in, when we know it's needed |
| StringBuilder lineBuffer = new StringBuilder(); |
| |
| try { |
| //while ((line = lis.readLine()) != null) { |
| do { |
| line = lis.readLine(); |
| if (line != null && |
| (line.startsWith(" ") || line.startsWith("\t"))) { |
| // continuation of header |
| if (prevline != null) { |
| lineBuffer.append(prevline); |
| prevline = null; |
| } |
| lineBuffer.append("\r\n"); |
| lineBuffer.append(line); |
| } else { |
| // new header |
| if (prevline != null) { |
| addHeaderLine(prevline); |
| } else if (lineBuffer.length() > 0) { |
| // store previous header first |
| addHeaderLine(lineBuffer.toString()); |
| lineBuffer.setLength(0); |
| } |
| prevline = line; |
| } |
| } while (line != null && line.length() > 0); |
| } catch (IOException ioex) { |
| throw new MIMEParsingException("Error in input stream", ioex); |
| } |
| } |
| |
| /** |
| * Return all the values for the specified header. The |
| * values are String objects. Returns <code>null</code> |
| * if no headers with the specified name exist. |
| * |
| * @param name header name |
| * @return array of header values, or null if none |
| */ |
| List<String> getHeader(String name) { |
| // XXX - should we just step through in index order? |
| FinalArrayList<String> v = new FinalArrayList<String>(); // accumulate return values |
| |
| int len = headers.size(); |
| for( int i=0; i<len; i++ ) { |
| Hdr h = (Hdr) headers.get(i); |
| if (name.equalsIgnoreCase(h.name)) { |
| v.add(h.getValue()); |
| } |
| } |
| return (v.size() == 0) ? null : v; |
| } |
| |
| /** |
| * Return all the headers as an Enumeration of |
| * {@link Header} objects. |
| * |
| * @return Header objects |
| */ |
| FinalArrayList<? extends Header> getAllHeaders() { |
| return headers; // conceptually it should be read-only, but for performance reason I'm not wrapping it here |
| } |
| |
| /** |
| * Add an RFC822 header line to the header store. |
| * If the line starts with a space or tab (a continuation line), |
| * add it to the last header line in the list. <p> |
| * <p/> |
| * Note that RFC822 headers can only contain US-ASCII characters |
| * |
| * @param line raw RFC822 header line |
| */ |
| void addHeaderLine(String line) { |
| try { |
| char c = line.charAt(0); |
| if (c == ' ' || c == '\t') { |
| Hdr h = (Hdr) headers.get(headers.size() - 1); |
| h.line += "\r\n" + line; |
| } else { |
| headers.add(new Hdr(line)); |
| } |
| } catch (StringIndexOutOfBoundsException e) { |
| // line is empty, ignore it |
| } catch (NoSuchElementException e) { |
| // XXX - vector is empty? |
| } |
| } |
| |
| } |
| |
| /* |
| * A private utility class to represent an individual header. |
| */ |
| |
| class Hdr implements Header { |
| |
| String name; // the canonicalized (trimmed) name of this header |
| // XXX - should name be stored in lower case? |
| String line; // the entire RFC822 header "line" |
| |
| /* |
| * Constructor that takes a line and splits out |
| * the header name. |
| */ |
| Hdr(String l) { |
| int i = l.indexOf(':'); |
| if (i < 0) { |
| // should never happen |
| name = l.trim(); |
| } else { |
| name = l.substring(0, i).trim(); |
| } |
| line = l; |
| } |
| |
| /* |
| * Constructor that takes a header name and value. |
| */ |
| Hdr(String n, String v) { |
| name = n; |
| line = n + ": " + v; |
| } |
| |
| /* |
| * Return the "name" part of the header line. |
| */ |
| @Override |
| public String getName() { |
| return name; |
| } |
| |
| /* |
| * Return the "value" part of the header line. |
| */ |
| @Override |
| public String getValue() { |
| int i = line.indexOf(':'); |
| if (i < 0) { |
| return line; |
| } |
| |
| int j; |
| if (name.equalsIgnoreCase("Content-Description")) { |
| // Content-Description should retain the folded whitespace after header unfolding - |
| // rf. RFC2822 section 2.2.3, rf. RFC2822 section 3.2.3 |
| for (j = i + 1; j < line.length(); j++) { |
| char c = line.charAt(j); |
| if (!(/*c == ' ' ||*/c == '\t' || c == '\r' || c == '\n')) { |
| break; |
| } |
| } |
| } else { |
| // skip whitespace after ':' |
| for (j = i + 1; j < line.length(); j++) { |
| char c = line.charAt(j); |
| if (!(c == ' ' || c == '\t' || c == '\r' || c == '\n')) { |
| break; |
| } |
| } |
| } |
| return line.substring(j); |
| } |
| } |