Review

finding-0

org/w3c/jigsaw/ssi/SSIFrame.java

handle(Request)

class SSIFrame {
    public Reply handle(Request request)
	throws ProtocolException
    {
	if (fresource == null)
	    return null;
	if(SSIFrame.debug)
	    System.out.println("@@@@ handle: "+
			       (request.isInternal() 
				? "internal" : "external") ) ;
	fresource.checkContent() ;
	
	Integer depth =
	    (Integer) request.getState(STATE_DEPTH) ;
	if(depth == null) depth = new Integer(0) ;
	int unparsedSize = 0 ;
	Segment[] segments = getSegments() ;
	if(segments == null) {
	    parseFirstTime() ;
	    if( (segments = getSegments()) == null )
		return null ; // Last resort: fall back to superclass
	}
	Reply reply = null ;
	try {
	    // Obtain a command registry
	    updateRegistry() ;
	    vars = (Dictionary)
		request.getState(STATE_VARIABLES) ;
	    // Initialize the registry-dependent variables:
	    vars = commReg.initVariables(this,request,vars) ;
	    // Add our "very global" variables
	    vars.put("secure",getValue(ATTR_SECURE,Boolean.TRUE)) ;
	    vars.put("maxDepth",getValue(ATTR_MAX_DEPTH,new Integer(10))) ;
	    vars.put("depth",depth) ;
	    vars.put("registry",commReg) ;
	    // Prepare the initial reply
	    // (which represents the unparsed parts of the document)
	    // and a prototype reply for segments that return null.
	    reply = createDefaultReply(request,HTTP.OK) ; 
	    Reply defSegReply = createDefaultReply(request,HTTP.OK) ;
	    int unpSize = getUnparsedSize() ;
	    if(unpSize == -1) 
		reply.setHeaderValue(Reply.H_CONTENT_LENGTH,null) ;
	    else 
		reply.setContentLength(unpSize) ;
	    defSegReply.setHeaderValue(Reply.H_CONTENT_LENGTH,null) ;
	    long ims = request.getIfModifiedSince() ;
	    long cmt = fresource.getFileStamp() ;	
	    // used to be getLastModified()
	    // should be something better
	    // than either
	    if(SSIFrame.debug)
		System.out.println("@@@@ IMS: "+cmt+" vs "+ims) ;
	    if(ims != -1 && cmt != -1 && cmt <= ims) {
		reply.setStatus(HTTP.NOT_MODIFIED) ;
		defSegReply.setStatus(HTTP.NOT_MODIFIED) ;
	    } else if(ims != -1) {
		if(SSIFrame.debug)
		    System.out.println("@@@@ Removed NOT MODIFIED") ;
	    }
	    
	    if(cmt != -1)
		defSegReply.setLastModified(cmt) ;
	    
	    // For each segment:
	    // 	. obtain a reply,
	    // 	. merge its headers with the global reply's headers,
	    Reply[] partReps = new Reply[segments.length] ;
	    for(int i=0;i<segments.length;i++) {
		if(!segments[i].isUnparsed()) {
		    if(SSIFrame.debug)
			System.out.println("@@@@ Analyzing segment " +
					   segments[i]) ;
		    partReps[i] = segments[i].init(this, request, 
						   vars, commReg, i);
		    if(SSIFrame.debug) {
			if (partReps[i] == null)
			    System.out.println("@@@@ (null segment)") ;
			System.out.println("@@@@ cacheReplies : "+
					   cacheReplies());
		    }
		    
		    merge(reply,
			  partReps[i] != null ? partReps[i] : defSegReply) ;
		}
	    }
	    // Set a stream, unless we're not supposed to.
	    // Also handle the case of no command segments.
	    switch(reply.getStatus()) {
	    default:
		reply.setStream
		    (new SSIStream(cacheReplies(),
				   segments,
				   partReps,
				   new RandomAccessFile(fresource.getFile(),
							"r"))) ;
	    case HTTP.NO_CONTENT:
	    case HTTP.NOT_MODIFIED:
	    }
	    if(SSIFrame.debug)
		System.out.println("@@@@ Last-modified: " +
				   reply.getLastModified()) ;
	    reply.setDate(System.currentTimeMillis()) ;
	    return reply ;
	} catch(SSIException ex) {
	    reply = createDefaultReply(request,HTTP.INTERNAL_SERVER_ERROR) ;
	    reply.setContent("SSIFrame is misconfigured: "+
			     ex.getMessage());
	    throw new HTTPException(reply) ;
	} catch(Exception ex) {
	    ex.printStackTrace() ;
	    if(SSIFrame.debug) {
		if(SSIFrame.debug)
		    System.out.println("@@@@ Fallback to FileResource") ;
	    }
	    return null ;  // Last resort: fall back to superclass
	}
    }
}