NanoHttpd Demo是个好东西

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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);    }    @Override    public 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;    }    @Override    public 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);    }    @Override    public 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': {//page                String 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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