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 * Copyright (c) 2000 The Apache Software Foundation.  All rights
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package com.sun.ts.tests.common.webclient.handler;

import org.apache.commons.httpclient.Header;

import com.sun.ts.lib.util.TestUtil;

/**
 * <PRE>
 * When invoked, the content-type header
 * will be appropriately handled.  It allows
 * flexible checking of control values against
 * the response which could be in the form of:
 *    content-type; charset
 *      -or-
 *    conent-type
 * </PRE>
 */
public class ContentTypeHandler implements Handler {

    private static Handler handler = new ContentTypeHandler();

    /**
     * Creates new ContentTypeHandler
     */
    private ContentTypeHandler() {
    }

    /*
     * public methods ========================================================================
     */

    /**
     * Returns an instance of this handler.
     */
    public static Handler getInstance() {
        return handler;
    }

    /**
     * Invokes handler logic.
     * 
     * @param configuredHeader the user configured header
     * @param responseHeader the response header from the server
     * @return True if the passed match, otherwise false
     */
    public boolean invoke(Header configuredHeader, Header responseHeader) {
        boolean ret = false;
        TestUtil.logTrace("[ContentTypeHandler] ContentTypeHandler invoked.");
        String configVal = configuredHeader.getValue().trim();
        String responseVal = responseHeader.getValue().trim();
        int colIdx = configVal.indexOf(';');
        if (colIdx < 0) {
            // Info we're interested in : type/subtype

            // check response Content-Type header to see what format
            // it's in.
            int rColIdx = responseVal.indexOf(';');
            if (rColIdx < 0) {
                // Type and subtype, i.e. type/subtype are to be compared
                // case insensitively.
                if (configVal.equalsIgnoreCase(responseVal)) {
                    ret = true;
                }
            } else {
                if (configVal.equalsIgnoreCase(responseVal.substring(0, rColIdx))) {
                    ret = true;
                }
            }
        } else {
            // Info we're interested in : type/subtype; parameter=value

            int rColIdx = responseVal.indexOf(';');
            if (rColIdx > -1) {
                String confTypeSubType = configVal.substring(0, colIdx).trim();
                String responseTypeSubType = responseVal.substring(0, rColIdx).trim();
                String confParameter = configVal.substring(colIdx + 1).trim();
                String responseParameter = (responseVal.substring(rColIdx + 1).trim()).replaceAll(" ", "");
                // compare type/subtype in a case insensitive manner
                if (confTypeSubType.equalsIgnoreCase(responseTypeSubType)) {
                    // next validate the parameter in a case insensitive manner
                    if (confParameter.equalsIgnoreCase(responseParameter)) {
                        ret = true;
                    }
                }
            }
        }
        return ret;
    }
}
