package luan.webserver.handlers;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import luan.webserver.Handler;
import luan.webserver.Request;
import luan.webserver.Response;


public final class FileHandler implements Handler {
	private final File dir;

	public FileHandler() {
		this(".");
	}

	public FileHandler(String pathname) {
		this(new File(pathname));
	}

	public FileHandler(File dir) {
		if( !dir.isDirectory() )
			throw new RuntimeException("must be a directory");
		this.dir = dir;
	}

	public Response handle(Request request) {
		File file = new File(dir,request.path);
		if( file.isFile() ) {
			Response response = new Response();
			try {
				response.body = new Response.Body( file.length(), new FileInputStream(file) );
			} catch(FileNotFoundException e) {
				throw new RuntimeException(e);
			}
			return response;
		}
		return null;
	}
}