【How Tomcat works】解析Tomcat

最近在看 容器的東西，看到了jetty，但是沒找到jetty的書籍和資料，就拿Tomcat的資料來學習下。發現實例程序有點問題，特意記錄一下。

第一個實例使用 瀏覽器訪問失敗了，但是測試 404是可以的，後來改了下 response的代碼，特意加上 響應頭，就可以了，具體的原因，還待研究：

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：（記得把 webroot 的目錄加載進來，因爲要加載 images/logo.gif）

第二個例子：