【How Tomcat works】解析Tomcat

最近在看 容器的东西，看到了jetty，但是没找到jetty的书籍和资料，就拿Tomcat的资料来学习下。发现实例程序有点问题，特意记录一下。

第一个实例使用 浏览器访问失败了，但是测试 404是可以的，后来改了下 response的代码，特意加上 响应头，就可以了，具体的原因，还待研究：

package ex01.pyrmont;

import java.io.OutputStream;
import java.io.IOException;
import java.io.FileInputStream;
import java.io.File;

public class Response {

	private static final int BUFFER_SIZE = 1024;
	Request request;
	OutputStream output;

	public Response(OutputStream output) {
		this.output = output;
	}

	public void setRequest(Request request) {
		this.request = request;
	}

	public void sendStaticResource() throws IOException {
		byte[] bytes = new byte[BUFFER_SIZE];
		FileInputStream fis = null;
		try {
			File file = new File(HttpServer.WEB_ROOT, request.getUri());
			if (file.exists()) {
				fis = new FileInputStream(file);
				int ch = fis.read(bytes, 0, BUFFER_SIZE);
				String response = "HTTP/1.1 200 OK\r\n" + "Content-Type: text/html\r\n" + "\r\n";
				output.write(response.getBytes());
				while (ch != -1) {
					output.write(bytes, 0, ch);
					ch = fis.read(bytes, 0, BUFFER_SIZE);
				}
			} else {
				// file not found
				String errorMessage = "HTTP/1.1 404 File Not Found\r\n" + "Content-Type: text/html\r\n"
						+ "Content-Length: 23\r\n" + "\r\n" + "<h1>File Not Found</h1>";
				output.write(errorMessage.getBytes());
			}
		} catch (Exception e) {
			System.out.println(e.toString());
		} finally {
			if (fis != null)
				fis.close();
		}
	}
}

效果：（记得把 webroot 的目录加载进来，因为要加载 images/logo.gif）

第二个例子：