Bug 176681 Issue about creating context-parameter path in read-only path[0601]
Description: Issue about creating context-parameter path in read-only path Build number:2.2.0.v20070308 Steps to reproduce: 1. Deploy birt. 2. Set BIRT_VIEWER_DOCUMENT_FOLDER/BIRT_VIEWER_IMAGE_DIR/.. to a read-only path. 3. Preview report. Expected result: Because the path is read-only, folders should be created in ${java.io.tmpdir} Actual result: No folders are created in ${java.io.tmpdir} and reports cannot be previewed in frameset mode.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
encoding = UTF_8_ENCODE;
		return encoding;
	}
	/**
	 * Check whether show the report title.
	 * 
	 * @param request
	 * @return
	 */
	public static boolean isShowTitle( HttpServletRequest request )
	{
		boolean isTitle = true;
		if ( "false".equalsIgnoreCase( getParameter( request, PARAM_SHOW_TITLE ) ) ) 
		{
			isTitle = false;
		}
		return isTitle;
	}
	/**
	 * Check whether show the toolbar.
	 * 
	 * @param request
	 * @return
	 */
	public static boolean isShowToolbar( HttpServletRequest request )
	{
		boolean isToolbar = true;
		if ( "false".equalsIgnoreCase( getParameter( request, PARAM_TOOLBAR ) ) ) 
		{
			isToolbar = false;