Review

finding-3

org/w3c/jigsaw/frames/HTTPFrame.java

browse(Request)

class HTTPFrame {
    /**
     * A present to GNNPress users !
     * This method implements the <code>BROWSE</code> method that
     * AOL press (or GNN press, or whatever its last name is) expects.
     * @param request The request to process.
     * @exception ProtocolException If some error occurs.
     * @return A Reply instance.
     */
    public Reply browse (Request request) 
	throws ProtocolException
    {
	if (dresource == null) {
	    Reply error = request.makeReply(HTTP.NOT_IMPLEMENTED) ;
	    error.setContent("Method "+request.getMethod()+
			     " not implemented.") ;
	    throw new HTTPException (error) ;
	}

	Enumeration  enum      = dresource.enumerateResourceIdentifiers() ;
	Vector       resources = Sorter.sortStringEnumeration(enum) ;
	int          rsize     = ((resources == null) ? 0 : resources.size()) ;
	StringBuffer sb        = new StringBuffer() ;

	// As we have enumerated all resources, just looking the store is ok
	for (int i = 0 ; i < rsize ; i++) {
	    String            rname = (String) resources.elementAt(i) ;
	    ResourceReference rr    = null;
	    Resource          r     = null;
	    try {
		rr = dresource.lookup(rname) ;
		r = rr.lock();
		// may throw InvalidResourceException

		if ( r instanceof DirectoryResource ) {
		    sb.append("application/x-navidir "+
			      rname+
			      "\r\n") ;
		} else {
		    HTTPFrame itsframe = 
			(HTTPFrame) resource.getFrame(getClass());
		    if (itsframe != null) {
			sb.append(itsframe.getContentType().toString()+
				  " "+
				  rname+
				  "\r\n") ;
		    }
		}
	    } catch (InvalidResourceException ex) {
		continue;
	    } finally {
		rr.unlock();
	    }
	}
	Reply reply = request.makeReply(HTTP.OK) ;
	reply.addPragma("no-cache");
	reply.setNoCache();
	reply.setContent(sb.toString()) ;
	reply.setContentType(getBrowseType());
	return reply ;
    }
}