jWAP-1.2-src.tar.gz_wap_wap stack

/** * JWAP - A Java Implementation of the WAP Protocols * Copyright (C) 2001-2004 Niko Bender * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ package net.sourceforge.jwap.wsp.header; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.OutputStream; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Enumeration; import net.sourceforge.jwap.util.Logger; import net.sourceforge.jwap.util.TransTable; import net.sourceforge.jwap.wsp.WSPDecoder; /** * This class implements the WAP default codepage for Header encoding/decoding * * @author Michel Marti */ public class WAPCodePage extends CodePage { private static final String TT_CTENC = "content-encoding"; private static final String TT_WKPARMS = "wk-params-1.3"; private static final String TT_CHARSETS = "charsets"; private static final String TT_LNG = "languages"; private static final String TT_CCONTROL = "cache-control"; private static final String TT_CTYPES = "content-types-1.3"; private static final Logger log = Logger.getLogger(WAPCodePage.class); private static SimpleDateFormat fmt = new SimpleDateFormat("EEE, d MMM yyyy HH:mm:ss zzz"); private TransTable transTable; /** * Construct a new WAP Code Page. Encoding is done according to WAP encoding * version 1.1 * @throws IOException if the code-page translation table cannot be found */ protected WAPCodePage() throws IOException { this(1, 1); } /** * Construct a new WAP Code Page * @param major WAP major version * @param minor WAP minor version * @throws IOException if the code-page translation table cannot be found */ protected WAPCodePage(int major, int minor) throws IOException { super(1, true, "default"); StringBuffer rn = new StringBuffer("wsp-headers-").append(major) .append(".").append(minor); transTable = TransTable.getTable(rn.toString()); } /** * Returns an instance of the WAP Codepage. Encoding is done according * to encoding version 1.1 */ public static WAPCodePage getInstance() { try { return new WAPCodePage(1,1); } catch (IOException e) { throw new RuntimeException(e.getMessage()); } } /** * Returns an instance of the WAP Codepage. Encoding is done according * to the specified encoding version. * @param major the major encoding version * @param minor the minor encoding version * @throws IllegalArgumentException if no encoding exists for the * specified major/minor version */ public static WAPCodePage getInstance(int major, int minor) throws IllegalArgumentException { try { return new WAPCodePage(major, minor); } catch (IOException e) { throw new IllegalArgumentException(major + "." + minor + ": No encoding available"); } } public byte[] encode(String key, String value) throws HeaderParseException { String lowKey = key.toLowerCase().trim(); Object o = transTable.str2code(lowKey); if (log.isDebugEnabled()) { log.debug("encode: '" + key + "' -> " + o); } // Not a Well-Known value? if (o == null) { if (log.isDebugEnabled()) { log.debug(key + ": Not a well known value, using text-string encoding"); } return Encoding.encodeHeader(key, Encoding.textString(value)); } ByteArrayOutputStream out = new ByteArrayOutputStream(); short wk = ((Integer) o).shortValue(); try { if ("content-base".equals(lowKey)) { throw new HeaderParseException(key + ": Deprecated Header field"); } try { // Invoke handler using reflection.. encodeHeader(lowKey, out, wk, value); } catch (NoSuchMethodException nsme) { log.warn(key + ": No handler for this header, using text-string encoding"); out.write(Encoding.encodeHeader(wk, Encoding.textString(value))); } } catch (HeaderParseException hpe) { throw hpe; } catch (IOException ex) { throw new HeaderParseException("I/O Error while encoding.", ex); } catch (Exception uex) { log.warn("Unexpected exception while encoding "+key+"="+value, uex); throw new HeaderParseException("Unexpected exception while encoding.", uex); } return out.toByteArray(); } public byte[] encode(String key, Date value) { Object o = transTable.str2code(key.trim()); long secs = (value == null) ? 0 : (value.getTime() / 1000); byte[] hv = Encoding.longInteger(secs); if (o == null) { return Encoding.encodeHeader(key, hv); } else { return Encoding.encodeHeader(((Integer) o).shortValue(), hv); } } public byte[] encode(String key, long value) throws HeaderParseException { Object o = transTable.str2code(key.trim()); short wk = ((o == null) ? (-1) : ((Integer) o).shortValue()); if (value < 0) { throw new HeaderParseException(value + ": negative integer values not accepted"); } byte[] hv = Encoding.integerValue(value); if (o == null) { return Encoding.encodeHeader(key, hv); } else { return Encoding.encodeHeader(wk, hv); } } public void encodeAccept(OutputStream hdrs, short wk, String value) throws IOException { for (Enumeration e = HeaderToken.tokenize(value); e.hasMoreElements();) { HeaderToken ht = (HeaderToken) e.nextElement(); String token = ht.getToken(); // Lookup content-type Integer code = TransTable.getTable(TT_CTYPES).str2code(token); if (code == null) { hdrs.write(Encoding.encodeHeader(wk, Encoding.textString(token))); } else { hdrs.write(Encoding.encodeHeader(wk, Encoding.shortInteger(code.shortValue()))); } } } public void encodeAcceptCharset(OutputStream hdrs, short wk, String value) throws IOException { for (Enumeration e = HeaderToken.tokenize(value); e.hasMoreElements();) { HeaderToken ht = (HeaderToken) e.nextElement(); String token = ht.getToken(); if ("*".equals(token)) { hdrs.write(new byte[] { (byte) wk, (byte) 0xff }); continue; } Integer wkl = TransTable.getTable(TT_CHARSETS).str2code(token); String qf = ht.getParameter("q"); if (qf == null) { if (wkl != null) { hdrs.write(Encoding.encodeHeader(wk, Encoding.integerValue(wkl.longValue()))); } else { hdrs.write(Encoding.encodeHeader(wk, Encoding.extensionMedia(to