requestutil.java

低版本的tomcat 对于有些老版本的应用还真的需要老版的中间件

                }
            }

            // if there were non-metacharacters, copy them all as a block
            if (laPos > strPos) {
                dec.append(str.substring(strPos,laPos));
                strPos = laPos;
            }

            // shortcut out of here if we're at the end of the string
            if (strPos >= strLen) {
                break;
            }

            // process next metacharacter
            char metaChar = str.charAt(strPos);
            if (metaChar == '+') {
                dec.append(' ');
                strPos++;
                continue;
            } else if (metaChar == '%') {
                char c = (char) Integer.parseInt(str.substring(strPos + 1, strPos + 3), 16);
                if(c == '/' || c == '%' || c=='.' || c == '\\' || c == '\0')
                    dec.append(str.substring(strPos, strPos+3));
                else
                    dec.append(c);
                strPos += 3;
            }
        }

        return dec.toString();
    }

    public static String unUrlDecode(String data) {
	StringBuffer buf = new StringBuffer();
	for (int i = 0; i < data.length(); i++) {
	    char c = data.charAt(i);
	    switch (c) {
	    case '+':
		buf.append(' ');
		break;
	    case '%':
		// XXX XXX 
		try {
		    buf.append((char) Integer.parseInt(data.substring(i+1,
                        i+3), 16));
		    i += 2;
		} catch (NumberFormatException e) {
                    String msg = "Decode error ";
		    // XXX no need to add sm just for that
		    // sm.getString("serverRequest.urlDecode.nfe", data);

		    throw new IllegalArgumentException(msg);
		} catch (StringIndexOutOfBoundsException e) {
		    String rest  = data.substring(i);
		    buf.append(rest);
		    if (rest.length()==2)
			i++;
		}
		
		break;
	    default:
		buf.append(c);
		break;
	    }
	}
	return buf.toString();
    }           
	

    // Basically return everything after ";charset="
    // If no charset specified, use the HTTP default (ASCII) character set.
    public static String getCharsetFromContentType(String type) {
        if (type == null) {
            return null;
        }
        int semi = type.indexOf(";");
        if (semi == -1) {
            return null;
        }
        String afterSemi = type.substring(semi + 1);
        int charsetLocation = afterSemi.indexOf("charset=");
        if (charsetLocation == -1) {
            return null;
        }
        String afterCharset = afterSemi.substring(charsetLocation + 8);
        // The charset value in a Content-Type header is allowed to be quoted
        // and charset values can't contain quotes.  Just convert any quote
        // chars into spaces and let trim clean things up.
        afterCharset = afterCharset.replace('"', ' ');
        String encoding = afterCharset.trim();
        return encoding;
    }

    public static Locale getLocale(Request req) {
    	String acceptLanguage = req.getHeader("Accept-Language");
	    if( acceptLanguage == null ) return Locale.getDefault();

        Hashtable languages = new Hashtable();
        Vector quality=new Vector();
        processAcceptLanguage(acceptLanguage, languages,quality);

        if (languages.size() == 0) return Locale.getDefault();

        Vector l = new Vector();
        extractLocales( languages,quality, l);

        return (Locale)l.elementAt(0);
    }

    public static Enumeration getLocales(HttpServletRequest req) {
	    String acceptLanguage = req.getHeader("Accept-Language");
    	// Short circuit with an empty enumeration if null header
        if (acceptLanguage == null) {
            Vector v = new Vector();
            v.addElement(Locale.getDefault());
            return v.elements();
        }

        Hashtable languages = new Hashtable();
        Vector quality=new Vector();
    	processAcceptLanguage(acceptLanguage, languages , quality);

        if (languages.size() == 0) {
            Vector v = new Vector();
            v.addElement(Locale.getDefault());
            return v.elements();
        }
    	Vector l = new Vector();
    	extractLocales( languages, quality , l);
    	return l.elements();
    }

    public static void processAcceptLanguage( String acceptLanguage,
					      Hashtable languages, Vector q)
    {
        StringTokenizer languageTokenizer =
            new StringTokenizer(acceptLanguage, ",");

        while (languageTokenizer.hasMoreTokens()) {
            String language = languageTokenizer.nextToken().trim();
            int qValueIndex = language.indexOf(';');
            int qIndex = language.indexOf('q');
            int equalIndex = language.indexOf('=');
            Double qValue = new Double(1);

            if (qValueIndex > -1 &&
                    qValueIndex < qIndex &&
                    qIndex < equalIndex) {
    	        String qValueStr = language.substring(qValueIndex + 1);
                language = language.substring(0, qValueIndex);
                qValueStr = qValueStr.trim().toLowerCase();
                qValueIndex = qValueStr.indexOf('=');
                qValue = new Double(0);
                if (qValueStr.startsWith("q") &&
                    qValueIndex > -1) {
                    qValueStr = qValueStr.substring(qValueIndex + 1);
                    try {
                        qValue = new Double(qValueStr.trim());
                    } catch (NumberFormatException nfe) {
                    }
                }
            }

            // XXX
            // may need to handle "*" at some point in time

            if (! language.equals("*")) {
                String key = qValue.toString();
                Vector v;
                if (languages.containsKey(key)) {
                    v = (Vector)languages.get(key) ;
                } else {
                    v= new Vector();
                    q.addElement(qValue);
                }
                v.addElement(language);
                languages.put(key, v);
            }
        }
    }

    public static void extractLocales(Hashtable languages, Vector q,Vector l)
    {
        // XXX We will need to order by q value Vector in the Future ?
        Enumeration e = q.elements();
        while (e.hasMoreElements()) {
            Vector v =
                (Vector)languages.get(((Double)e.nextElement()).toString());
            Enumeration le = v.elements();
            while (le.hasMoreElements()) {
    	        String language = (String)le.nextElement();
	        	String country = "";
        		int countryIndex = language.indexOf("-");
                if (countryIndex > -1) {
                    country = language.substring(countryIndex + 1).trim();
                    language = language.substring(0, countryIndex).trim();
                }
                l.addElement(new Locale(language, country));
            }
        }
    }


    /**
     * Filter the specified message string for characters that are sensitive
     * in HTML.  This avoids potential attacks caused by including JavaScript
     * codes in the request URL that is often reported in error messages.
     *
     * @param message The message string to be filtered
     */
    public static String filter(String message) {

        if (message == null)
            return (null);

        char content[] = new char[message.length()];
        message.getChars(0, message.length(), content, 0);
        StringBuffer result = new StringBuffer(content.length + 50);
        for (int i = 0; i < content.length; i++) {
            switch (content[i]) {
            case '<':
                result.append("&lt;");
                break;
            case '>':
                result.append("&gt;");
                break;
            case '&':
                result.append("&amp;");
                break;
            case '"':
                result.append("&quot;");
                break;
            default:
                result.append(content[i]);
            }
        }
        return (result.toString());

    }



    /* -------------------- From HttpDate -------------------- */
    // Parse date - XXX This code is _very_ slow ( 3 parsers, GregorianCalendar,
    // etc ). It was moved out to avoid creating 1 Calendar instance ( and
    // a associated parsing ) per header ( the Calendar was created in HttpDate
    // which was created for each HeaderField ).
    // This also avoid passing HttpHeaders - which was required to access
    // HttpHeaderFiled to access HttpDate to access the parsing code.

    // we force our locale here as all http dates are in english
    private final static Locale loc = Locale.US;

    // all http dates are expressed as time at GMT
    private final static TimeZone zone = TimeZone.getTimeZone("GMT");

    // format for RFC 1123 date string -- "Sun, 06 Nov 1994 08:49:37 GMT"
    private final static String rfc1123Pattern ="EEE, dd MMM yyyyy HH:mm:ss z";

    // format for RFC 1036 date string -- "Sunday, 06-Nov-94 08:49:37 GMT"
    private final static String rfc1036Pattern ="EEEEEEEEE, dd-MMM-yy HH:mm:ss z";

    // format for C asctime() date string -- "Sun Nov  6 08:49:37 1994"
    private final static String asctimePattern ="EEE MMM d HH:mm:ss yyyyy";

    private final static SimpleDateFormat rfc1123Format =
	new SimpleDateFormat(rfc1123Pattern, loc);

    private final static SimpleDateFormat rfc1036Format =
	new SimpleDateFormat(rfc1036Pattern, loc);

    private final static SimpleDateFormat asctimeFormat =
	new SimpleDateFormat(asctimePattern, loc);

    public static long toDate( String dateString ) {
	// XXX
	Date date=null;
	try {
            date = rfc1123Format.parse(dateString);
	} catch (ParseException e) { }
          catch (StringIndexOutOfBoundsException e) { }
	
        if( date==null)
	    try {
		date = rfc1036Format.parse(dateString);
	    } catch (ParseException e) { }
              catch (StringIndexOutOfBoundsException e) { }
	
        if( date==null)
	    try {
		date = asctimeFormat.parse(dateString);
	    } catch (ParseException pe) {
	    }
              catch (StringIndexOutOfBoundsException e) { }

	if(date==null) {
	    return -1;
	}

	// Original code was: 
	//	Calendar calendar = new GregorianCalendar(zone, loc);
	//calendar.setTime(date);
	// calendar.getTime().getTime();
	return date.getTime();
    }
    
}