NanoHttpd Demo是个好东西

前几天，在做一个视频BT项目的时候，看各种博文之类的，突然就看到提出了一个NanoHttpd视频服务器的博文。于是就跟进去看了一下，发现，里面就一个链接。
GitHub地址：https://github.com/NanoHttpd/nanohttpd
然后就没了。。。
本来像这种标题党，我已经举报他。可是，我又很想知道，所以我就跟进去看了一下，NanoHttpd，嗯，一个Java文件的项目，嗯。
然后研究了一下源码，发现，从所未有的爽，的确，给个链接就够了。

这里贴一个简单的Demo，来自NanoHttpd。

package fi.iki.elonen;/** #%L* NanoHttpd-Samples* %%* Copyright (C) 2012 - 2015 nanohttpd* %%* Redistribution and use in source and binary forms, with or without modification,* are permitted provided that the following conditions are met:* * 1. Redistributions of source code must retain the above copyright notice, this*    list of conditions and the following disclaimer.* * 2. Redistributions in binary form must reproduce the above copyright notice,*    this list of conditions and the following disclaimer in the documentation*    and/or other materials provided with the distribution.* * 3. Neither the name of the nanohttpd nor the names of its contributors*    may be used to endorse or promote products derived from this software without*    specific prior written permission.* * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED* OF THE POSSIBILITY OF SUCH DAMAGE.* #L%*/import java.util.Map;
import java.util.logging.Logger;import fi.iki.elonen.util.ServerRunner;/*** An example of subclassing NanoHTTPD to make a custom HTTP server.*/
public class HelloServer extends NanoHTTPD {/*** logger to log to.*/private static final Logger LOG = Logger.getLogger(HelloServer.class.getName());public static void main(String[] args) {ServerRunner.run(HelloServer.class);}public HelloServer() {super(8080);}@Overridepublic Response serve(IHTTPSession session) {Method method = session.getMethod();String uri = session.getUri();HelloServer.LOG.info(method + " '" + uri + "' ");String msg = "<html><body><h1>Hello server</h1>\n";Map<String, String> parms = session.getParms();if (parms.get("username") == null) {msg += "<form action='?' method='get'>\n" + "  <p>Your name: <input type='text' name='username'></p>\n" + "</form>\n";} else {msg += "<p>Hello, " + parms.get("username") + "!</p>";}msg += "</body></html>\n";return newFixedLengthResponse(msg);}
}

只要你导包，然后运行上面的东西就可以用浏览器访问8080端口，就能看到输出了，简单明了。
因此我就对他进行了一些改动，变成一个视频网站的项目，代码如下。

package com.chen.video.resource;import fi.iki.elonen.NanoHTTPD;import java.io.FileInputStream;
import java.io.FileNotFoundException;import static fi.iki.elonen.NanoHTTPD.newChunkedResponse;/*** Created by CHEN on 2016/8/14.*/
public class VideoResource {public static NanoHTTPD.Response getVideo(String videoURI) {try {FileInputStream fis = new FileInputStream(videoURI);return newChunkedResponse(NanoHTTPD.Response.Status.OK, "movie.mp4", fis);}catch (FileNotFoundException e) {e.printStackTrace();return null;}}}

package com.chen.video;import fi.iki.elonen.NanoHTTPD;
import fi.iki.elonen.NanoHTTPD.Response.Status;
import fi.iki.elonen.util.ServerRunner;import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;/*** Created by CHEN on 2016/8/14.*/
public class VideoServer extends NanoHTTPD{public static final int DEFAULT_SERVER_PORT = 8080;public static final String TAG = VideoServer.class.getSimpleName();public String filePath= "movie.mp4";private static final String REQUEST_ROOT = "/";private String mVideoFilePath;private int mVideoWidth  = 0;private int mVideoHeight = 0;private static final int VIDEO_WIDTH= 320;private static final int VIDEO_HEIGHT = 240;public VideoServer() {super(DEFAULT_SERVER_PORT);mVideoFilePath = filePath;mVideoWidth  = VIDEO_WIDTH;mVideoHeight = VIDEO_HEIGHT;}@Overridepublic Response serve(IHTTPSession session) {if(REQUEST_ROOT.equals(session.getUri())) {return responseRootPage(session);}else if("/movie.mp4".equals(session.getUri())) {return responseVideoStream(session);}return response404(session,session.getUri());}public Response responseRootPage(IHTTPSession session) {String rootURL=this.getClass().getResource("/").getPath();File file = new File(rootURL+"/com/chen/video/"+mVideoFilePath);/* if(!file.exists()) {return response404(session,mVideoFilePath);}*/StringBuilder builder = new StringBuilder();builder.append("<!DOCTYPE html><html><body>");builder.append("<video ");builder.append("width="+getQuotaStr(String.valueOf(mVideoWidth))+" ");builder.append("height="+getQuotaStr(String.valueOf(mVideoHeight))+" ");builder.append("controls>");builder.append("<source src="+getQuotaStr("/movie.mp4")+" ");builder.append("type="+getQuotaStr("video/mp4")+">");builder.append("Your browser doestn't support HTML5");builder.append("</video>");builder.append("</body></html>\n");return newFixedLengthResponse(builder.toString());}public Response responseVideoStream(IHTTPSession session) {try {FileInputStream fis = new FileInputStream(this.getClass().getResource("/").getPath()+"/com/chen/video/"+mVideoFilePath);return newChunkedResponse(Status.OK, "movie.mp4", fis);}catch (FileNotFoundException e) {e.printStackTrace();return response404(session,mVideoFilePath);}}public Response response404(IHTTPSession session,String url) {StringBuilder builder = new StringBuilder();builder.append("<!DOCTYPE html><html><body>");builder.append("Sorry, Can't Found "+url + " !");builder.append("</body></html>\n");return newFixedLengthResponse(builder.toString());}protected String getQuotaStr(String text) {return "\"" + text + "\"";}public static void main(String[] args) {ServerRunner.run(VideoServer.class);}
}

package com.chen.video;import com.chen.video.resource.VideoResource;
import fi.iki.elonen.NanoHTTPD;
import fi.iki.elonen.util.ServerRunner;import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;import static com.chen.video.resource.VideoResource.getVideo;
import static jdk.nashorn.internal.objects.NativeString.substring;/*** Created by CHEN on 2016/8/14.*/
public class MyVideoServer extends NanoHTTPD {public static void main(String[] args) {ServerRunner.run(MyVideoServer.class);}public MyVideoServer() {super(8088);}@Overridepublic Response serve(IHTTPSession session) {//在这里做一些跳转的控制/*注释说明：这里感觉太耗资源了，没必要，所以改成以下形式if(session.getUri().contains("page")) {//说明是页面} else if(session.getUri().contains("resource")) {}*///TODO 规定一级路径为类，二级路径为方法//TODO 规定资源都是一级路径//现在暂时简单实现，毕竟是教学String uri = session.getUri();String[] uriSplit = uri.split("/");Response response = null;switch (uriSplit[1].charAt(0)){case 'p': {//pageString classURI = uriSplit[2].substring(0, 1).toUpperCase() + uriSplit[2].substring(1) + "Controller";try {Class clazz = Class.forName("com.chen.video.controller."+classURI);java.lang.reflect.Method method = clazz.getMethod("getVideoPage");response = (Response) method.invoke(null);} catch (Exception e) {//TODO 其实抛出了很多的异常 但是为了代码不要被异常包围，先统一处理e.printStackTrace();}}break;case 'r': {//resource//本来应该有一个资源分类的 比如说是音频还是书籍 但是这里也统一处理了 默认是音频String resourceURI=uriSplit[2];response= VideoResource.getVideo(this.getClass().getResource("/").getPath()+"com/chen/video/"+resourceURI);}break;default: {}break;}//异常处理if(null!=response) {return response;} else {//TODO 处理return null;}}
}

请注意一点，NanoHttpd是一个BIO项目。

源码解读

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NanoHttpd Demo是个好东西

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