java - 使用 Java 托管 MP3 文件

Question

所以我正在尝试模拟类似该站点设置的内容:

http://www.ntonyx.com/mp3files/Morning_Flower.mp3

当像 chrome 这样的浏览器转到这个确切的 url 时，基本上会出现一个播放器，您可以“播放”音乐。

import java.io.IOException;
import java.io.OutputStream;
import java.net.InetSocketAddress;

import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;

public class WebServer {

    public static void main(String[] args) throws Exception {
        HttpServer server = HttpServer.create(new InetSocketAddress(8000), 0);
        server.createContext("/test/file.mp3", new MyHandler());
        server.setExecutor(null); // creates a default executor
        server.start();
    }

    static class MyHandler implements HttpHandler {
        @Override
        public void handle(HttpExchange t) throws IOException {
            String response = "This is the response";
            t.sendResponseHeaders(200, response.length());
            OutputStream os = t.getResponseBody();
            os.write(response.getBytes());
            os.close();
        }
    }

}

我正在尝试用一些简单的 Java 代码来模拟它。我正在努力弄清楚我应该如何格式化以这种方式出现的请求。有没有办法将存储在我的驱动器上的本地文件发送到请求？我一直在努力寻找如何执行此操作的示例

Answer 1

您可以使用 FileInputStream 读取文件的字节以发送到浏览器:

import java.io.IOException;
import java.io.OutputStream;
import java.io.FileInputStream;
import java.net.InetSocketAddress;

import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;

public class WebServer {

    public static void main(String[] args) throws Exception {
        HttpServer server = HttpServer.create(new InetSocketAddress(8000), 0);
        server.createContext("/test/file.mp3", new MyHandler());
        server.setExecutor(null); // creates a default executor
        server.start();
    }

    static class MyHandler implements HttpHandler {
        @Override
        public void handle(HttpExchange t) throws IOException {

            File file = new File("path/to/file.mp3");                 // Create a new File object pointing to your mp3 file   

            /* https://stackoverflow.com/questions/38679686/ :) */   
            t.getResponseHeaders().put("Content-Type", "audio/mpeg"); // Make sure the browser knows this is an audio file
            t.sendResponseHeaders(200, file.length());                // Send the length of the file to the browser

            FileInputStream stream = new FileInputStream(file);       // Open an InputStream to read your file
            OutputStream os = t.getResponseBody();
            byte[] buff = new byte[1024];                             // Create a small buffer to hold bytes as you read them
            int read = 0;                                             // Keep track of how many bytes you read

            // While there are still bytes to read, send them to the client
            while((read = stream.read(buff)) > 0) {
                os.write(buff, 0, read);
            }
            // Close the streams
            os.close();
            stream.close();
        }
    }

}