//
//  ========================================================================
//  Copyright (c) 1995-2019 Mort Bay Consulting Pty. Ltd.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package org.eclipse.jetty.http;

import org.eclipse.jetty.util.TypeUtil;

HTTP constants
/** * HTTP constants */
public class HttpTokens { static final byte COLON = (byte)':'; static final byte TAB = 0x09; static final byte LINE_FEED = 0x0A; static final byte CARRIAGE_RETURN = 0x0D; static final byte SPACE = 0x20; static final byte[] CRLF = {CARRIAGE_RETURN, LINE_FEED}; public enum EndOfContent { UNKNOWN_CONTENT, NO_CONTENT, EOF_CONTENT, CONTENT_LENGTH, CHUNKED_CONTENT } public enum Type { CNTL, // Control characters excluding LF, CR HTAB, // Horizontal tab LF, // Line feed CR, // Carriage return SPACE, // Space COLON, // Colon character DIGIT, // Digit ALPHA, // Alpha TCHAR, // token characters excluding COLON,DIGIT,ALPHA, which is equivalent to VCHAR excluding delimiters VCHAR, // Visible characters excluding COLON,DIGIT,ALPHA OTEXT // Obsolete text } public static class Token { private final Type _type; private final byte _b; private final char _c; private final int _x; private Token(byte b, Type type) { _type = type; _b = b; _c = (char)(0xff & b); char lc = (_c >= 'A' & _c <= 'Z') ? ((char)(_c - 'A' + 'a')) : _c; _x = (_type == Type.DIGIT || _type == Type.ALPHA && lc >= 'a' && lc <= 'f') ? TypeUtil.convertHexDigit(b) : -1; } public Type getType() { return _type; } public byte getByte() { return _b; } public char getChar() { return _c; } public boolean isHexDigit() { return _x >= 0; } public int getHexDigit() { return _x; } @Override public String toString() { switch (_type) { case SPACE: case COLON: case ALPHA: case DIGIT: case TCHAR: case VCHAR: return _type + "='" + _c + "'"; case CR: return "CR=\\r"; case LF: return "LF=\\n"; default: return String.format("%s=0x%x", _type, _b); } } } public static final Token[] TOKENS = new Token[256]; static { for (int b = 0; b < 256; b++) { // token = 1*tchar // tchar = "!" / "#" / "$" / "%" / "&" / "'" / "*" // / "+" / "-" / "." / "^" / "_" / "`" / "|" / "~" // / DIGIT / ALPHA // ; any VCHAR, except delimiters // quoted-string = DQUOTE *( qdtext / quoted-pair ) DQUOTE // qdtext = HTAB / SP /%x21 / %x23-5B / %x5D-7E / obs-text // obs-text = %x80-FF // comment = "(" *( ctext / quoted-pair / comment ) ")" // ctext = HTAB / SP / %x21-27 / %x2A-5B / %x5D-7E / obs-text // quoted-pair = "\" ( HTAB / SP / VCHAR / obs-text ) switch (b) { case LINE_FEED: TOKENS[b] = new Token((byte)b, Type.LF); break; case CARRIAGE_RETURN: TOKENS[b] = new Token((byte)b, Type.CR); break; case SPACE: TOKENS[b] = new Token((byte)b, Type.SPACE); break; case TAB: TOKENS[b] = new Token((byte)b, Type.HTAB); break; case COLON: TOKENS[b] = new Token((byte)b, Type.COLON); break; case '!': case '#': case '$': case '%': case '&': case '\'': case '*': case '+': case '-': case '.': case '^': case '_': case '`': case '|': case '~': TOKENS[b] = new Token((byte)b, Type.TCHAR); break; default: if (b >= 0x30 && b <= 0x39) // DIGIT TOKENS[b] = new Token((byte)b, Type.DIGIT); else if (b >= 0x41 && b <= 0x5A) // ALPHA (uppercase) TOKENS[b] = new Token((byte)b, Type.ALPHA); else if (b >= 0x61 && b <= 0x7A) // ALPHA (lowercase) TOKENS[b] = new Token((byte)b, Type.ALPHA); else if (b >= 0x21 && b <= 0x7E) // Visible TOKENS[b] = new Token((byte)b, Type.VCHAR); else if (b >= 0x80) // OBS TOKENS[b] = new Token((byte)b, Type.OTEXT); else TOKENS[b] = new Token((byte)b, Type.CNTL); } } } }