SsiOutputAdapter.java

package divconq.web.ui.adapter;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import divconq.filestore.CommonPath;
import divconq.io.ByteBufWriter;
import divconq.io.CacheFile;
import divconq.web.IOutputAdapter;
import divconq.web.Response;
import divconq.web.WebContext;
import divconq.web.WebSite;

public class SsiOutputAdapter implements IOutputAdapter {
	public static final Pattern SSI_VIRTUAL_PATTERN = Pattern.compile("<!--#include virtual=\"(.*)\" -->");

	public CommonPath webpath = null;
	public CacheFile file = null;
	protected String mime = null; 
	
	@Override
	public void init(WebSite site, CacheFile file, CommonPath web, boolean isPreview) {
		this.webpath = web;
		this.file = file;		
		this.mime = site.getMimeType(this.file.getExt());		
	}
	
	@Override
	public void execute(WebContext ctx) throws Exception {
		Response resp = ctx.getResponse(); 
		
		resp.setHeader("Content-Type", this.mime);
		resp.setDateHeader("Date", System.currentTimeMillis());
		resp.setDateHeader("Last-Modified", this.file.getWhen());
		resp.setHeader("X-UA-Compatible", "IE=Edge,chrome=1");
		
		// because of Macro support we need to rebuild this page every time it is requested
		String content = this.file.asString();
		
		content = ctx.expandMacros(content);
		
		boolean checkmatches = true;

		while (checkmatches) {
			checkmatches = false;
			Matcher m = SsiOutputAdapter.SSI_VIRTUAL_PATTERN.matcher(content);

			while (m.find()) {
				String grp = m.group();

				String vfilename = grp.substring(1, grp.length() - 1);

				System.out.println("include v file: " + vfilename);
				
				/*
				String val = null;   // TODO load file content

				// if any of these, then replace and check (expand) again 
				if (val != null) {
					content = content.replace(grp, val);
					checkmatches = true;
				}
				*/
			}
		}

		// TODO add compression
		//if (asset.getCompressed())
		//	resp.setHeader("Content-Encoding", "gzip");
		
		ByteBufWriter buffer = ByteBufWriter.createLargeHeap();
		buffer.write(content);
		
		ctx.sendStart(buffer.readableBytes());

		ctx.send(buffer.getByteBuf());

		ctx.sendEnd();
	}
}