Android中如何搭建一个WebServer
今天终于把老大交代的任务搞完了，感觉收获挺多的，所以就写一篇来记录一下吧，首先还是来看一下，老大们的需求
需求：
希望移动端的用户标识(IMEI)和HTML页面的用户标识(Cookie)连接起来，其中HTML页面可能是用户使用PC访问指定的html页面也有可能是移动端使用浏览器访问html页面
技术解决：
运用移动设备的系统特型，用Apps的Service监听本地的网络端口，当局域网内或本机的Html页面通过请求调用本地IP:Port时触发监听。Apps在将当前Html的Cookie和移动设备标识物发回服务端时，即实现了本次PC/Mobile Html页面的Cookie和移动设备的互相绑定。
具体实现方案之多端通信技术方案
各模块细节
1.Native App(移动端的app)：
1).跟随主服务常驻内存，在收到当前网络环境为Wifi事件后，启动HttpServer。
(当前网络切换成3G/2G等网络时关闭HttpServer)。
以上这步我们叫做注册:启动移动端的HttpServer的时候，我们会将移动设备的ip地址(内网地址)发送到指定的后台Server上
2).收到从Web来的http请求后，往Server发送绑定请求，这时候就将移动端的IMEI和HTML中的Cookie一起上传到指定的Server上
例如：
http://serverhost/?cookie=123213&imei=31233213123
以上这步我们叫做一次绑定的完成操作
以为我们是在移动端开始一个HttpServer的，所以要考虑一些额外的因素，比如耗电量
风险控制：使用灰度测试规则，并使用开关限制功能。
功耗风险：经过三台设备测试，电量消耗忽略不计（具体CPU使用时间在统计）。
2.Web JS：
1).加载页面加载后先从CDN加载一个静态的JS到此页面。
2).静态JS再请求Server 获取一段动态JS用以做本地Ping。
(如果此IP已有N次获取，则考虑>N的节点是一个大型公共网络，则把此公共IP加入黑名单，不再返回动态JS)
3).获得动态JS后直接Ping本地的HttpServer。
(Ping的IP/Port会随着动态JS一起下发)
这里我们是在Html页面中使用JS脚本来处理传递Cookie给移动端的功能。
3.Bridge Server：
1).Sever选型：Node.js
同时考虑到开发效率，性能，和client的JS的契合度。
Node.js单台16核服务器，4节点，QPS经测试能到6k-8k。
较适合短频非阻塞的请求。
2).数据存储：Redis
考虑到NativeApp的外网IP时效性，以及对于短频请求的快速应答。
以外网IP为Key，各个IP为Value。每天清理一次外网IP。
存储格式：{外网IP：{NativeApp IP/Port, .........}}
3).移动端所需要的接口
接口一：Native App 对于本外网IP的注册的请求。
接口二：Navtive App的绑定请求。
具体原理图：
上面讲解了一下技术的实现方案，下面我们就来看一下，具体的实现技术
首先来看移动端的，我们需要建立一个HttpServer
我们可能知道在PC端建立一个Server很简单，直接使用Tomcat服务器就可以了，但是我们移动端不可能去搭建一个服务器的，那么我们该怎么办呢？我们可以在网上搜索一下关于如何在手机中搭建一个WebServce，我们可以看到Apache已经帮我们做好了这件事了，他提供了一个jar，有相应的api，同时还有一种技术就是老外有个人写好了一个类：NanoHttpd，我们只需要看懂这个类，然后自己在编写一个类，继承这个类即可，因为这个类是抽象的。这两种搭建的Server原理都是很简单的，就是建立一个Socket连接，这个和Tomcat是一样的，只是他们将这种操作进行优化处理了，那么我们首先来看一下Apache给我们提供的这个HttpServer：
按照上面的技术方案，我们希望这个HttpServer常驻在一个服务中进行监听的，所以我们需要建立一个Service
package com.sohu.tests; import java.io.IOException; import org.apache.http.client.ClientProtocolException; import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.os.IBinder;
import android.util.Log; public class SocketService extends Service { private int port = Consts.defaultPort; //网络开关状态改变的监听
private BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if(intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)){
AppListYPLog.e("DEMO","网络状态切换...");
//注册接口
new Thread(){
@Override
public void run(){
//开始注册
register();
}
}.start();
}
}
}; @Override
public IBinder onBind(Intent arg0) {
return null;
} @Override
public void onCreate() {
super.onCreate();
Log.v("23233", "Complete"); Utils.init(this); //开启监听端口
HttpServer hs = new HttpServer();
try{
AppListYPLog.i("监听开启...");
for(int i=0;i<Consts.portAry.length;i++){
if(Utils.checkPort(Consts.portAry[i])){
port = Consts.portAry[i];
break;
}
}
hs.execute(port);
register();
}catch(Exception e){
AppListYPLog.e("异常:"+e.getMessage());
} //注册广播
IntentFilter filter = new IntentFilter();
filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
registerReceiver(receiver, filter); } /**
* 注册ip地址
* @return
*/
public boolean register(){
//拼接参数
StringBuilder param = new StringBuilder();
param.append("imei=");
param.append(Utils.getImeiInfo());
param.append("&hs_ip=");
param.append(Utils.getLocalHostIp()+":"+port);
param.append("&route_mac=");
param.append(Utils.getRouteMac());
param.append("&route_ssid=");
param.append(Utils.getRouteSSID());
param.append("&timetag=");
param.append(System.currentTimeMillis()+""); boolean flag = false; //上报数据
if(Utils.checkNetWorkState()){
try {
flag = NetUtils.uploadRequest(Consts.registerUrl, param.toString());
if(flag){
AppListYPLog.i("注册操作成功");
//Toast.makeText(getApplicationContext(), "注册成功", Toast.LENGTH_LONG).show();
}else{
AppListYPLog.e("注册操作失败");
//Toast.makeText(getApplicationContext(), "注册失败", Toast.LENGTH_LONG).show();
}
} catch (ClientProtocolException e) {
AppListYPLog.e("异常:"+e.getMessage()+",注册失败");
} catch (IOException e) {
AppListYPLog.e("异常:"+e.getMessage()+",注册失败");
} catch(Exception e){
AppListYPLog.e("异常:"+e.getMessage()+",注册失败");
}
} return flag;
} }
在这个服务中，我们开始的时候就进行注册，上报一些信息：
imei:手机移动的标识
hs_ip:手机的HttpServer的地址和端口号
route_mac:手机连接的路由器的mac地址
route_ssid:手机连接的路由器的ssid
timetag:注册的时间戳
同时我们还注册了一个监听网络变化的广播，这个是为了防止，开始的时候用户没有开启网络，一旦用户开启网路的时候，我们就开启监听并且进行注册。
这里我们使用的监听端口是3个，因为我们知道，端口最大的是655535，0-1024是系统使用的，所以我们就使用了三个备用的端口，在使用这个端口之前要检测一下该端口有没有被占用，这里我们就使用Socket探针技术。
再来看一下最核心的HttpServer的实现：
首先我们需要下载Apache提供的jar包：
http://download.csdn.net/detail/jiangwei0910410003/7431829
代码：
package com.sohu.tests; import java.io.IOException;
import java.io.InterruptedIOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Locale; import java.util.Map; import org.apache.http.ConnectionClosedException;
import org.apache.http.HttpException;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.HttpResponseInterceptor;
import org.apache.http.HttpServerConnection;
import org.apache.http.HttpStatus;
import org.apache.http.MethodNotSupportedException;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.DefaultConnectionReuseStrategy;
import org.apache.http.impl.DefaultHttpResponseFactory;
import org.apache.http.impl.DefaultHttpServerConnection;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.CoreConnectionPNames;
import org.apache.http.params.CoreProtocolPNames;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.apache.http.protocol.HttpProcessor;
import org.apache.http.protocol.HttpRequestHandler;
import org.apache.http.protocol.HttpRequestHandlerRegistry;
import org.apache.http.protocol.HttpService;
import org.apache.http.protocol.ImmutableHttpProcessor;
import org.apache.http.protocol.ResponseConnControl;
import org.apache.http.protocol.ResponseContent;
import org.apache.http.protocol.ResponseDate;
import org.apache.http.protocol.ResponseServer; public class HttpServer { //获取来访者的ip地址
private static String ipAddress = ""; //开启监听
public void execute(int port) throws Exception{
Thread t = new RequestListenerThread(port);
t.setDaemon(false);
t.start();
} //自定义HttpRequest的处理类，我们需要继承HttpRequestHandler接口
static class WebServiceHandler implements HttpRequestHandler { public WebServiceHandler() {
super();
} //在这个方法中我们就可以处理请求的业务逻辑
public void handle(final HttpRequest request,
final HttpResponse response, final HttpContext context)
throws HttpException, IOException { //获取请求方法
String method = request.getRequestLine().getMethod().toUpperCase(Locale.ENGLISH);
//获取请求的uri
String target = request.getRequestLine().getUri();
Map<String,String> params = Utils.getParam(target);
//拼接参数
StringBuilder param = new StringBuilder();
param.append("cookie=");
if(params.get("cookie") != null){
param.append(params.get("cookie"));
}
param.append("&imei=");
param.append(Utils.getImeiInfo());
param.append("&visitor_ip=");
param.append(ipAddress);
param.append("&local_ip=");
param.append(Utils.getLocalHostIp());
param.append("&route_mac=");
param.append(Utils.getRouteMac());
param.append("&route_ssid=");
param.append(Utils.getRouteSSID());
param.append("&timetag=");
param.append(System.currentTimeMillis()+""); //上报数据
try{
if(Utils.checkNetWorkState()){
boolean flag = NetUtils.uploadRequest(Consts.cookieUrl, param.toString());
if(flag){
AppListYPLog.e("完成操作成功");
}else{
AppListYPLog.e("完成操作失败");
}
}
}catch(Exception e){
AppListYPLog.e("异常:"+e.getMessage()+"完成操作失败");
} //get请求方式(我们这里只处理get方式)
if (method.equals("GET") ) {
response.setStatusCode(HttpStatus.SC_OK);
StringEntity entity = new StringEntity("Request Success!!");
response.setEntity(entity);
} else if (method.equals("POST") ) {
response.setStatusCode(HttpStatus.SC_OK);
StringEntity entity = new StringEntity("Request Success!!");
response.setEntity(entity);
} else {
throw new MethodNotSupportedException(method + " method not supported");
}
} } /**
* 自定一个监听的线程
* @author weijiang204321
*
*/
static class RequestListenerThread extends Thread { private final ServerSocket serversocket;
private final HttpParams params;
private final HttpService httpService; public RequestListenerThread(int port)
throws IOException { /**********************下面就是模板代码了***********************/
this.serversocket = new ServerSocket(port); HttpProcessor httpproc = new ImmutableHttpProcessor(
new HttpResponseInterceptor[] {
new ResponseDate(), new ResponseServer(),
new ResponseContent(), new ResponseConnControl() });
this.params = new BasicHttpParams();
this.params
.setIntParameter(CoreConnectionPNames.SO_TIMEOUT, 5000)
.setIntParameter(CoreConnectionPNames.SOCKET_BUFFER_SIZE,8 * 1024)
.setBooleanParameter(CoreConnectionPNames.STALE_CONNECTION_CHECK, false)
.setBooleanParameter(CoreConnectionPNames.TCP_NODELAY, true)
.setParameter(CoreProtocolPNames.ORIGIN_SERVER,"HttpComponents/1.1"); //这只请求头信息
HttpRequestHandlerRegistry reqistry = new HttpRequestHandlerRegistry();
//WebServiceHandler用来处理webservice请求,这里我们可以注册多个处理器Handler的
reqistry.register("*", new WebServiceHandler()); this.httpService = new HttpService(httpproc,
new DefaultConnectionReuseStrategy(),
new DefaultHttpResponseFactory());
httpService.setParams(this.params);
//为http服务设置注册好的请求处理器。
httpService.setHandlerResolver(reqistry); } @Override
public void run() {
AppListYPLog.i("Listening on port " + this.serversocket.getLocalPort());
AppListYPLog.i("Thread.interrupted = " + Thread.interrupted());
while (!Thread.interrupted()) {
try {
// 建立Http连接
Socket socket = this.serversocket.accept();
DefaultHttpServerConnection conn = new DefaultHttpServerConnection();
ipAddress = socket.getInetAddress().getHostAddress();
AppListYPLog.i("Incoming connection from " + socket.getInetAddress());
conn.bind(socket, this.params);
//开启工作线程
Thread t = new WorkerThread(this.httpService, conn);
t.setDaemon(true);
t.start();
} catch (InterruptedIOException ex) {
AppListYPLog.e("异常:InterruptedIOException");
break;
} catch (IOException e) {
AppListYPLog.e("I/O error initialising connection thread: " + e.getMessage());
break;
}
}
}
} /**
* 后台工作线程
* @author weijiang204321
*
*/
static class WorkerThread extends Thread { private final HttpService httpservice;
private final HttpServerConnection conn; public WorkerThread(final HttpService httpservice,final HttpServerConnection conn) {
super();
this.httpservice = httpservice;
this.conn = conn;
} @Override
public void run() {
System.out.println("New connection thread");
HttpContext context = new BasicHttpContext(null);
try {
while (!Thread.interrupted() && this.conn.isOpen()) {
this.httpservice.handleRequest(this.conn, context);
}
} catch (ConnectionClosedException ex) {
System.err.println("Client closed connection");
} catch (IOException ex) {
System.err.println("I/O error: " + ex.getMessage());
} catch (HttpException ex) {
System.err.println("Unrecoverable HTTP protocol violation: "+ ex.getMessage());
} finally {
try {
this.conn.shutdown();
} catch (IOException ignore) {
}
}
}
} }
我们首先需要定义一个RequestHander用来处理请求的逻辑结果，同时我们需要建立一个HttpConnection,这里我们需要获取来访者的ip地址，所以我们定义了一个全局的变量ipAddress,然后在WebServiceHandler类中的handle方法中进行上报完成的动作，需要上报的参数为：
cookie:来访者携带的cookie值(也就是Html页面中的cookie)
imei:手机的移动标识
visitor_ip:来访者的ip地址
local_ip:本机的ip地址
route_mac:手机连接的路由器的地址
route_ssid:手机连接的路由器的ssid
timetag:上报的时间戳
下面再来看一下辅助类
Utils:
package com.sohu.tests; import java.io.IOException;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.Socket;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map; import org.apache.http.conn.util.InetAddressUtils; import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.telephony.TelephonyManager;
import android.text.TextUtils; /**
* 工具类
*
* @author weijiang204321
*
*/
public class Utils { public static Context mContext; public static void init(Context context) {
mContext = context;
} /**
*
* @param str
* @return 字符串是否为空
*/
public static boolean isNotEmpty(String str) {
if (str != null && !"".equals(str)) {
return true;
}
return false;
} /**
* 获取手机的Mac地址
*
* @return
*/
public static String getMacAddress() {
String result = "";
try {
WifiManager wifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
result = wifiInfo.getMacAddress();
} catch (Exception e) {
result = "";
}
return result;
} /**
* 获取手机的imei
*
* @return
*/
public static String getImeiInfo() {
try {
TelephonyManager mTm = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
return mTm.getDeviceId();
} catch (Exception e) {
e.printStackTrace();
return "";
} } /**
* 获取手机的imsi
*
* @return
*/
public static String getImsiInfo() {
try {
String imsi = "";
TelephonyManager telephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
if (telephonyManager != null) {
imsi = telephonyManager.getSubscriberId();
}
if (TextUtils.isEmpty(imsi)) {
imsi = "UNKNOWN";
}
return imsi;
} catch (Exception e) {
return "";
}
} /**
* 获取手机型号
*
* @return
*/
public static String getTypeInfo() {
return android.os.Build.MODEL; // 手机型号
} /**
* 获取手机系统版本
*
* @return
*/
public static String getOsVersion() {
return android.os.Build.VERSION.RELEASE;
} /**
* 获取路由器的SSID
*
* @return
*/
public static String getRouteSSID() {
try {
WifiManager wm = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
WifiInfo info = wm.getConnectionInfo();
if(info.getSSID().contains("<")){
return "";
}else{
return info.getSSID().replace("\"","") + "";
}
} catch (Exception e) {
AppListYPLog.e("异常:" + e.getMessage() + ",获取SSID失败!");
return "";
}
} /**
* 获取路由器的Mac地址
*
* @return
*/
public static String getRouteMac() {
try {
WifiManager wm = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
WifiInfo info = wm.getConnectionInfo();
if(info.getBSSID() == null){
return "";
}else{
return info.getBSSID() + "";
}
} catch (Exception e) {
AppListYPLog.e("异常:" + e.getMessage() + ",获取Mac地址失败!");
return "";
}
} /**
* 解析uri参数
* @param uri
* @return
*/
public static Map<String,String> getParam(String uri){
Map<String,String> params = new HashMap<String,String>();
try{
if(isNotEmpty(uri)){
String subStr = uri.substring(uri.indexOf("?")+1);
String[] ary = subStr.split("&");
for(int i=0;i<ary.length;i++){
String[] temp = ary[i].split("=");
if(temp.length<2){
params.put(temp[0], "");
}else{
params.put(temp[0], temp[1]);
} }
return params;
}else{
return null;
}
}catch(Exception e){
return null;
} } /**
* 判断网络
* @param ctx
* @return
*/
public static boolean checkNetWorkState() {
boolean isnetwork = false;
ConnectivityManager connManager = (ConnectivityManager) mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = connManager.getActiveNetworkInfo(); if (info != null && (info.isAvailable() || info.isConnected())) {
isnetwork = true;
}
return isnetwork;
} /**
* 获取本机的ip
* @return
*/
public static String getLocalHostIp(){
String ipaddress = "";
try{
Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces();
// 遍历所用的网络接口
while (en.hasMoreElements()){
NetworkInterface nif = en.nextElement();// 得到每一个网络接口绑定的所有ip
Enumeration<InetAddress> inet = nif.getInetAddresses();
// 遍历每一个接口绑定的所有ip
while (inet.hasMoreElements()){
InetAddress ip = inet.nextElement();
if (!ip.isLoopbackAddress()&& InetAddressUtils.isIPv4Address(ip.getHostAddress())){
return ip.getHostAddress();
}
}
}
}catch (SocketException e){
AppListYPLog.e("feige", "获取本地ip地址失败");
}
return ipaddress;
} /**
* 检查端口port是否被占用了
* @param port
* @return
*/
public static boolean checkPort(int port){
try{
InetAddress theAddress=InetAddress.getByName("127.0.0.1");
try {
Socket theSocket = new Socket(theAddress,port);
theSocket.close();
theSocket = null;
theAddress = null;
return false;
}catch (IOException e) {
AppListYPLog.e("异常:"+e.getMessage()+"检查端口号是否被占用");
}catch(Exception e){
AppListYPLog.e("异常:"+e.getMessage()+"检查端口号是否被占用");
}
}catch(UnknownHostException e) {
AppListYPLog.e("异常:"+e.getMessage()+"检查端口号是否被占用");
}
return true;
} }
网络工具类NetUtils
package com.sohu.tests; import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map.Entry;
import java.util.Set; import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.CoreConnectionPNames;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils; public final class NetUtils { /**
* 上传数据
*
* @param url
* @param param
* @return
*/
public static String postData(String url, HashMap<String, String> param) { HttpPost httpPost = new HttpPost(url);
// 设置HTTP POST请求参数必须用NameValuePair对象
List<NameValuePair> params = new ArrayList<NameValuePair>();
if (param != null) {
Set<Entry<String, String>> set = param.entrySet();
Iterator<Entry<String, String>> iterator = set.iterator();
while (iterator.hasNext()) {
Entry<String, String> tempEntry = iterator.next();
params.add(new BasicNameValuePair(tempEntry.getKey(), tempEntry.getValue()));
}
} else {
AppListYPLog.e("DEMO:", "上传参数错误");
return null;
}
HttpResponse httpResponse = null;
try {
// 设置httpPost请求参数
httpPost.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
HttpClient httpClient = new DefaultHttpClient();
// 请求超时
httpClient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 20000);
// 读取超时
httpClient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 20000);
httpResponse = httpClient.execute(httpPost);
if (httpResponse.getStatusLine().getStatusCode() == 200) {
// 第三步，使用getEntity方法活得返回结果
String result = EntityUtils.toString(httpResponse.getEntity());
return result;
}
} catch (ClientProtocolException e) {
AppListYPLog.e("异常:" + e.getMessage());
return null;
} catch (IOException e) {
AppListYPLog.e("异常:" + e.getMessage());
return null;
}
return null;
} /**
* @return 通过Request方式曝光
*/
public static boolean uploadRequest(String baseUrl, String param) throws ClientProtocolException, IOException {
HttpGet httpGet = null;
if (param != null && !"".equals(param)) {
httpGet = new HttpGet(baseUrl + "?" + param);
} else {
httpGet = new HttpGet(baseUrl);
}
AppListYPLog.e("URL:"+httpGet.getURI()+"");
HttpParams params = httpGet.getParams();
HttpConnectionParams.setConnectionTimeout(params, 3000);
HttpConnectionParams.setSoTimeout(params, 3000);
HttpClient httpClient = new DefaultHttpClient(params);
HttpResponse response = httpClient.execute(httpGet);
int statusCode = response.getStatusLine().getStatusCode();
AppListYPLog.e("响应码:" + statusCode);
if (statusCode < 300 && statusCode >= 200) {
return true;
}
return false;
} }
常量类：
package com.sohu.tests; /**
* 常量类
* @author weijiang204321
*
*/
public class Consts { /*cookie等信息上传url*/
public static final String cookieUrl = "http://192.168.1.110:8080/HttpServer/FinishServlets"; /*注册的url*/
public static final String registerUrl = "http://192.168.1.110:8080/HttpServer/RegisterServlets"; /*备用端口*/
public static int[] portAry = new int[]{23021,10034,48990}; /*默认端口*/
public static int defaultPort = 23021; }
打印Log类
package com.sohu.tests; import android.util.Log; /**
* 打印Log信息
* @author weijiang204321
*
*/
public class AppListYPLog { private final static String TAG = "APPLIST";
private static boolean SHOW_LOG = true; private AppListYPLog() {
} public static void closeLog() {
SHOW_LOG = false;
} public static void i(String msg) {
if (SHOW_LOG) {
Log.i(TAG, msg);
}
} public static void d(String msg) {
if (SHOW_LOG) {
Log.d(TAG, msg);
}
} public static void w(Exception ex) {
if (SHOW_LOG) {
ex.printStackTrace();
}
} public static void e(String msg) {
if (SHOW_LOG) {
Log.e(TAG, msg);
}
} public static void i(String tag, String msg) {
if (SHOW_LOG) {
Log.i(tag, msg);
}
} public static void d(String tag, String msg) {
if (SHOW_LOG) {
Log.d(tag, msg);
}
} public static void w(String tag, String msg) {
if (SHOW_LOG) {
Log.w(tag, msg);
}
} public static void e(String tag, String msg) {
if (SHOW_LOG) {
Log.e(tag, msg);
}
} }
测试的Demo:
package com.sohu.tests; import android.app.Activity;
import android.content.Intent;
import android.os.Bundle; public class Main extends Activity { @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mainlay);
startService(new Intent(this, SocketService.class));
} }
手机端的HttpServer就搭建完成了，下面我们要想测试的话，就必须在搭建一个Server端，我们这里就简单的建立一个Servlet：
移动端进行注册的接口：
package com.weijiang.httpserver; import java.io.IOException;
import java.util.Date; import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; public class RegisterServlets extends HttpServlet { private static final long serialVersionUID = 1L; protected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {
System.out.println("imei:"+req.getParameter("imei"));
System.out.println("hs_ip:"+req.getParameter("hs_ip"));
System.out.println("route_mac:"+req.getParameter("route_mac"));
System.out.println("route_ssid:"+req.getParameter("route_ssid"));
System.out.println("timetag："+new Date(Long.parseLong(req.getParameter("timetag"))));
} protected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {
doGet(req,resp);
} }
移动端完成操作的接口：
package com.weijiang.httpserver; import java.io.IOException;
import java.util.Date; import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; public class FinishServlets extends HttpServlet { private static final long serialVersionUID = 1L; protected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {
System.out.println("cookie:"+req.getParameter("cookie"));
System.out.println("imei:"+req.getParameter("imei"));
System.out.println("visitor_ip:"+req.getParameter("visitor_ip"));
System.out.println("local_ip:"+req.getParameter("local_ip"));
System.out.println("route_mac:"+req.getParameter("route_mac"));
System.out.println("route_ssid："+req.getParameter("route_ssid"));
System.out.println("timetag："+new Date(Long.parseLong(req.getParameter("timetag"))));
} protected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {
doGet(req,resp);
} }
模拟携带有cookie值的Html页面
<body>
<a href='http://192.168.1.109:23021?cookie=123456'>Click</a>
</body>
这里就是为了简单的模拟，所以直接随便写了一个cookie值
我们将PC和手机进行联网，这里不需要连接在一个网段中，只要在一个公网内就可以了，即他们两个可以ping通就可以，我这里在家里面测试的，用的是自己的路由器，所以一定是在一个网段中，我们查看PC的ip地址：
手机端的ip地址：
这样我们下面就可以来进行测试了，首先我们将Android应用部署到手机中，同时我们将Server启动，测试流程很简单：我们尝试改变网络状态，将网路断开，在进行连接，打印Log如下：
这里我们看到注册成功了，而且将手机的HttpServer的ip地址和监听端口上报了
我们在Server查看上报的信息：
我们就可以将手机的的内网地址进行保存，这里我们要注意在前面我们说到，这里还有一个步骤就是要获取公网的ip地址
上面的注册流程就走通了，下面我们看一下，完成操作的测试：
我们在浏览器中访问：
http://localhost:8080/HttpServer/index.jsp
点击Click,我们看到控制台中Log信息
我们看到完成操作，将cookie值和imei上报给Server端了，同时记录了来访者的ip地址
我们在Server的控制台中看到打印信息：
这样我们就将手机的imei和html页面的cookie值进行绑定了。。
前面我们说到了搭建移动端的Server的时候还有一种方法就是使用一个老外写的一个简单的类：
NanoHTTPD：
package com.sohu.nanohttpd; import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.RandomAccessFile;
import java.io.PushbackInputStream;
import java.io.UnsupportedEncodingException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.net.SocketTimeoutException;
import java.net.URLDecoder;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.TimeZone; /**
* A simple, tiny, nicely embeddable HTTP server in Java
* <p/>
* <p/>
* NanoHTTPD
* <p></p>Copyright (c) 2012-2013 by Paul S. Hawke, 2001,2005-2013 by Jarno Elonen, 2010 by Konstantinos Togias</p>
* <p/>
* <p/>
* <b>Features + limitations: </b>
* <ul>
* <p/>
* <li>Only one Java file</li>
* <li>Java 5 compatible</li>
* <li>Released as open source, Modified BSD licence</li>
* <li>No fixed config files, logging, authorization etc. (Implement yourself if you need them.)</li>
* <li>Supports parameter parsing of GET and POST methods (+ rudimentary PUT support in 1.25)</li>
* <li>Supports both dynamic content and file serving</li>
* <li>Supports file upload (since version 1.2, 2010)</li>
* <li>Supports partial content (streaming)</li>
* <li>Supports ETags</li>
* <li>Never caches anything</li>
* <li>Doesn't limit bandwidth, request time or simultaneous connections</li>
* <li>Default code serves files and shows all HTTP parameters and headers</li>
* <li>File server supports directory listing, index.html and index.htm</li>
* <li>File server supports partial content (streaming)</li>
* <li>File server supports ETags</li>
* <li>File server does the 301 redirection trick for directories without '/'</li>
* <li>File server supports simple skipping for files (continue download)</li>
* <li>File server serves also very long files without memory overhead</li>
* <li>Contains a built-in list of most common mime types</li>
* <li>All header names are converted lowercase so they don't vary between browsers/clients</li>
* <p/>
* </ul>
* <p/>
* <p/>
* <b>How to use: </b>
* <ul>
* <p/>
* <li>Subclass and implement serve() and embed to your own program</li>
* <p/>
* </ul>
* <p/>
* See the separate "LICENSE.md" file for the distribution license (Modified BSD licence)
*/
public abstract class NanoHTTPD {
/**
* Maximum time to wait on Socket.getInputStream().read() (in milliseconds)
* This is required as the Keep-Alive HTTP connections would otherwise
* block the socket reading thread forever (or as long the browser is open).
*/
public static final int SOCKET_READ_TIMEOUT = 5000;
/**
* Common mime type for dynamic content: plain text
*/
public static final String MIME_PLAINTEXT = "text/plain";
/**
* Common mime type for dynamic content: html
*/
public static final String MIME_HTML = "text/html";
/**
* Pseudo-Parameter to use to store the actual query string in the parameters map for later re-processing.
*/
private static final String QUERY_STRING_PARAMETER = "NanoHttpd.QUERY_STRING";
private final String hostname;
private final int myPort;
private ServerSocket myServerSocket;
private Set<Socket> openConnections = new HashSet<Socket>();
private Thread myThread;
/**
* Pluggable strategy for asynchronously executing requests.
*/
private AsyncRunner asyncRunner;
/**
* Pluggable strategy for creating and cleaning up temporary files.
*/
private TempFileManagerFactory tempFileManagerFactory; /**
* Constructs an HTTP server on given port.
*/
public NanoHTTPD(int port) {
this(null, port);
} /**
* Constructs an HTTP server on given hostname and port.
*/
public NanoHTTPD(String hostname, int port) {
this.hostname = hostname;
this.myPort = port;
setTempFileManagerFactory(new DefaultTempFileManagerFactory());
setAsyncRunner(new DefaultAsyncRunner());
} private static final void safeClose(Closeable closeable) {
if (closeable != null) {
try {
closeable.close();
} catch (IOException e) {
}
}
} private static final void safeClose(Socket closeable) {
if (closeable != null) {
try {
closeable.close();
} catch (IOException e) {
}
}
} private static final void safeClose(ServerSocket closeable) {
if (closeable != null) {
try {
closeable.close();
} catch (IOException e) {
}
}
} /**
* Start the server.
*
* @throws IOException if the socket is in use.
*/
public void start() throws IOException {
myServerSocket = new ServerSocket();
myServerSocket.bind((hostname != null) ? new InetSocketAddress(hostname, myPort) : new InetSocketAddress(myPort)); myThread = new Thread(new Runnable() {
@Override
public void run() {
do {
try {
final Socket finalAccept = myServerSocket.accept();
registerConnection(finalAccept);
finalAccept.setSoTimeout(SOCKET_READ_TIMEOUT);
final InputStream inputStream = finalAccept.getInputStream();
asyncRunner.exec(new Runnable() {
@Override
public void run() {
OutputStream outputStream = null;
try {
outputStream = finalAccept.getOutputStream();
TempFileManager tempFileManager = tempFileManagerFactory.create();
HTTPSession session = new HTTPSession(tempFileManager, inputStream, outputStream, finalAccept.getInetAddress());
while (!finalAccept.isClosed()) {
session.execute();
}
} catch (Exception e) {
// When the socket is closed by the client, we throw our own SocketException
// to break the "keep alive" loop above.
if (!(e instanceof SocketException && "NanoHttpd Shutdown".equals(e.getMessage()))) {
e.printStackTrace();
}
} finally {
safeClose(outputStream);
safeClose(inputStream);
safeClose(finalAccept);
unRegisterConnection(finalAccept);
}
}
});
} catch (IOException e) {
}
} while (!myServerSocket.isClosed());
}
});
myThread.setDaemon(true);
myThread.setName("NanoHttpd Main Listener");
myThread.start();
} /**
* Stop the server.
*/
public void stop() {
try {
safeClose(myServerSocket);
closeAllConnections();
myThread.join();
} catch (Exception e) {
e.printStackTrace();
}
} /**
* Registers that a new connection has been set up.
*
* @param socket
* the {@link Socket} for the connection.
*/
public synchronized void registerConnection(Socket socket) {
openConnections.add(socket);
} /**
* Registers that a connection has been closed
*
* @param socket
* the {@link Socket} for the connection.
*/
public synchronized void unRegisterConnection(Socket socket) {
openConnections.remove(socket);
} /**
* Forcibly closes all connections that are open.
*/
public synchronized void closeAllConnections() {
for (Socket socket : openConnections) {
safeClose(socket);
}
} public final int getListeningPort() {
return myServerSocket == null ? -1 : myServerSocket.getLocalPort();
} public final boolean wasStarted() {
return myServerSocket != null && myThread != null;
} public final boolean isAlive() {
return wasStarted() && !myServerSocket.isClosed() && myThread.isAlive();
} /**
* Override this to customize the server.
* <p/>
* <p/>
* (By default, this delegates to serveFile() and allows directory listing.)
*
* @param uri Percent-decoded URI without parameters, for example "/index.cgi"
* @param method "GET", "POST" etc.
* @param parms Parsed, percent decoded parameters from URI and, in case of POST, data.
* @param headers Header entries, percent decoded
* @return HTTP response, see class Response for details
*/
@Deprecated
public Response serve(String uri, Method method, Map<String, String> headers, Map<String, String> parms,
Map<String, String> files) {
return new Response(Response.Status.NOT_FOUND, MIME_PLAINTEXT, "Not Found");
} /**
* Override this to customize the server.
* <p/>
* <p/>
* (By default, this delegates to serveFile() and allows directory listing.)
*
* @param session The HTTP session
* @return HTTP response, see class Response for details
* 我们需要自己实现这个方法
*/
public Response serve(IHTTPSession session) {
Map<String, String> files = new HashMap<String, String>();
Method method = session.getMethod();
if (Method.PUT.equals(method) || Method.POST.equals(method)) {
try {
session.parseBody(files);
} catch (IOException ioe) {
return new Response(Response.Status.INTERNAL_ERROR, MIME_PLAINTEXT, "SERVER INTERNAL ERROR: IOException: " + ioe.getMessage());
} catch (ResponseException re) {
return new Response(re.getStatus(), MIME_PLAINTEXT, re.getMessage());
}
} Map<String, String> parms = session.getParms();
parms.put(QUERY_STRING_PARAMETER, session.getQueryParameterString());
return serve(session.getUri(), method, session.getHeaders(), parms, files);
} /**
* Decode percent encoded <code>String</code> values.
*
* @param str the percent encoded <code>String</code>
* @return expanded form of the input, for example "foo%20bar" becomes "foo bar"
*/
protected String decodePercent(String str) {
String decoded = null;
try {
decoded = URLDecoder.decode(str, "UTF8");
} catch (UnsupportedEncodingException ignored) {
}
return decoded;
} /**
* Decode parameters from a URL, handing the case where a single parameter name might have been
* supplied several times, by return lists of values. In general these lists will contain a single
* element.
*
* @param parms original <b>NanoHttpd</b> parameters values, as passed to the <code>serve()</code> method.
* @return a map of <code>String</code> (parameter name) to <code>List<String></code> (a list of the values supplied).
*/
protected Map<String, List<String>> decodeParameters(Map<String, String> parms) {
return this.decodeParameters(parms.get(QUERY_STRING_PARAMETER));
} /**
* Decode parameters from a URL, handing the case where a single parameter name might have been
* supplied several times, by return lists of values. In general these lists will contain a single
* element.
*
* @param queryString a query string pulled from the URL.
* @return a map of <code>String</code> (parameter name) to <code>List<String></code> (a list of the values supplied).
*/
protected Map<String, List<String>> decodeParameters(String queryString) {
Map<String, List<String>> parms = new HashMap<String, List<String>>();
if (queryString != null) {
StringTokenizer st = new StringTokenizer(queryString, "&");
while (st.hasMoreTokens()) {
String e = st.nextToken();
int sep = e.indexOf('=');
String propertyName = (sep >= 0) ? decodePercent(e.substring(0, sep)).trim() : decodePercent(e).trim();
if (!parms.containsKey(propertyName)) {
parms.put(propertyName, new ArrayList<String>());
}
String propertyValue = (sep >= 0) ? decodePercent(e.substring(sep + 1)) : null;
if (propertyValue != null) {
parms.get(propertyName).add(propertyValue);
}
}
}
return parms;
} // ------------------------------------------------------------------------------- //
//
// Threading Strategy.
//
// ------------------------------------------------------------------------------- // /**
* Pluggable strategy for asynchronously executing requests.
*
* @param asyncRunner new strategy for handling threads.
*/
public void setAsyncRunner(AsyncRunner asyncRunner) {
this.asyncRunner = asyncRunner;
} // ------------------------------------------------------------------------------- //
//
// Temp file handling strategy.
//
// ------------------------------------------------------------------------------- // /**
* Pluggable strategy for creating and cleaning up temporary files.
*
* @param tempFileManagerFactory new strategy for handling temp files.
*/
public void setTempFileManagerFactory(TempFileManagerFactory tempFileManagerFactory) {
this.tempFileManagerFactory = tempFileManagerFactory;
} /**
* HTTP Request methods, with the ability to decode a <code>String</code> back to its enum value.
*/
public enum Method {
GET, PUT, POST, DELETE, HEAD, OPTIONS; static Method lookup(String method) {
for (Method m : Method.values()) {
if (m.toString().equalsIgnoreCase(method)) {
return m;
}
}
return null;
}
} /**
* Pluggable strategy for asynchronously executing requests.
*/
public interface AsyncRunner {
void exec(Runnable code);
} /**
* Factory to create temp file managers.
*/
public interface TempFileManagerFactory {
TempFileManager create();
} // ------------------------------------------------------------------------------- // /**
* Temp file manager.
* <p/>
* <p>Temp file managers are created 1-to-1 with incoming requests, to create and cleanup
* temporary files created as a result of handling the request.</p>
*/
public interface TempFileManager {
TempFile createTempFile() throws Exception; void clear();
} /**
* A temp file.
* <p/>
* <p>Temp files are responsible for managing the actual temporary storage and cleaning
* themselves up when no longer needed.</p>
*/
public interface TempFile {
OutputStream open() throws Exception; void delete() throws Exception; String getName();
} /**
* Default threading strategy for NanoHttpd.
* <p/>
* <p>By default, the server spawns a new Thread for every incoming request. These are set
* to <i>daemon</i> status, and named according to the request number. The name is
* useful when profiling the application.</p>
*/
public static class DefaultAsyncRunner implements AsyncRunner {
private long requestCount; @Override
public void exec(Runnable code) {
++requestCount;
Thread t = new Thread(code);
t.setDaemon(true);
t.setName("NanoHttpd Request Processor (#" + requestCount + ")");
t.start();
}
} /**
* Default strategy for creating and cleaning up temporary files.
* <p/>
* <p></p>This class stores its files in the standard location (that is,
* wherever <code>java.io.tmpdir</code> points to). Files are added
* to an internal list, and deleted when no longer needed (that is,
* when <code>clear()</code> is invoked at the end of processing a
* request).</p>
*/
public static class DefaultTempFileManager implements TempFileManager {
private final String tmpdir;
private final List<TempFile> tempFiles; public DefaultTempFileManager() {
tmpdir = System.getProperty("java.io.tmpdir");
tempFiles = new ArrayList<TempFile>();
} @Override
public TempFile createTempFile() throws Exception {
DefaultTempFile tempFile = new DefaultTempFile(tmpdir);
tempFiles.add(tempFile);
return tempFile;
} @Override
public void clear() {
for (TempFile file : tempFiles) {
try {
file.delete();
} catch (Exception ignored) {
}
}
tempFiles.clear();
}
} /**
* Default strategy for creating and cleaning up temporary files.
* <p/>
* <p></p></[>By default, files are created by <code>File.createTempFile()</code> in
* the directory specified.</p>
*/
public static class DefaultTempFile implements TempFile {
private File file;
private OutputStream fstream; public DefaultTempFile(String tempdir) throws IOException {
file = File.createTempFile("NanoHTTPD-", "", new File(tempdir));
fstream = new FileOutputStream(file);
} @Override
public OutputStream open() throws Exception {
return fstream;
} @Override
public void delete() throws Exception {
safeClose(fstream);
file.delete();
} @Override
public String getName() {
return file.getAbsolutePath();
}
} /**
* HTTP response. Return one of these from serve().
*/
public static class Response {
/**
* HTTP status code after processing, e.g. "200 OK", HTTP_OK
*/
private Status status;
/**
* MIME type of content, e.g. "text/html"
*/
private String mimeType;
/**
* Data of the response, may be null.
*/
private InputStream data;
/**
* Headers for the HTTP response. Use addHeader() to add lines.
*/
private Map<String, String> header = new HashMap<String, String>();
/**
* The request method that spawned this response.
*/
private Method requestMethod;
/**
* Use chunkedTransfer
*/
private boolean chunkedTransfer; /**
* Default constructor: response = HTTP_OK, mime = MIME_HTML and your supplied message
*/
public Response(String msg) {
this(Status.OK, MIME_HTML, msg);
} /**
* Basic constructor.
*/
public Response(Status status, String mimeType, InputStream data) {
this.status = status;
this.mimeType = mimeType;
this.data = data;
} /**
* Convenience method that makes an InputStream out of given text.
*/
public Response(Status status, String mimeType, String txt) {
this.status = status;
this.mimeType = mimeType;
try {
this.data = txt != null ? new ByteArrayInputStream(txt.getBytes("UTF-8")) : null;
} catch (java.io.UnsupportedEncodingException uee) {
uee.printStackTrace();
}
} /**
* Adds given line to the header.
*/
public void addHeader(String name, String value) {
header.put(name, value);
} /**
* Sends given response to the socket.
*/
private void send(OutputStream outputStream) {
String mime = mimeType;
SimpleDateFormat gmtFrmt = new SimpleDateFormat("E, d MMM yyyy HH:mm:ss 'GMT'", Locale.US);
gmtFrmt.setTimeZone(TimeZone.getTimeZone("GMT")); try {
if (status == null) {
throw new Error("sendResponse(): Status can't be null.");
}
PrintWriter pw = new PrintWriter(outputStream);
pw.print("HTTP/1.1 " + status.getDescription() + " \r\n"); if (mime != null) {
pw.print("Content-Type: " + mime + "\r\n");
} if (header == null || header.get("Date") == null) {
pw.print("Date: " + gmtFrmt.format(new Date()) + "\r\n");
} if (header != null) {
for (String key : header.keySet()) {
String value = header.get(key);
pw.print(key + ": " + value + "\r\n");
}
} pw.print("Connection: keep-alive\r\n"); if (requestMethod != Method.HEAD && chunkedTransfer) {
sendAsChunked(outputStream, pw);
} else {
sendAsFixedLength(outputStream, pw);
}
outputStream.flush();
safeClose(data);
} catch (IOException ioe) {
// Couldn't write? No can do.
}
} private void sendAsChunked(OutputStream outputStream, PrintWriter pw) throws IOException {
pw.print("Transfer-Encoding: chunked\r\n");
pw.print("\r\n");
pw.flush();
int BUFFER_SIZE = 16 * 1024;
byte[] CRLF = "\r\n".getBytes();
byte[] buff = new byte[BUFFER_SIZE];
int read;
while ((read = data.read(buff)) > 0) {
outputStream.write(String.format("%x\r\n", read).getBytes());
outputStream.write(buff, 0, read);
outputStream.write(CRLF);
}
outputStream.write(String.format("0\r\n\r\n").getBytes());
} private void sendAsFixedLength(OutputStream outputStream, PrintWriter pw) throws IOException {
int pending = data != null ? data.available() : 0; // This is to support partial sends, see serveFile()
pw.print("Content-Length: "+pending+"\r\n"); pw.print("\r\n");
pw.flush(); if (requestMethod != Method.HEAD && data != null) {
int BUFFER_SIZE = 16 * 1024;
byte[] buff = new byte[BUFFER_SIZE];
while (pending > 0) {
int read = data.read(buff, 0, ((pending > BUFFER_SIZE) ? BUFFER_SIZE : pending));
if (read <= 0) {
break;
}
outputStream.write(buff, 0, read); pending -= read;
}
}
} public Status getStatus() {
return status;
} public void setStatus(Status status) {
this.status = status;
} public String getMimeType() {
return mimeType;
} public void setMimeType(String mimeType) {
this.mimeType = mimeType;
} public InputStream getData() {
return data;
} public void setData(InputStream data) {
this.data = data;
} public Method getRequestMethod() {
return requestMethod;
} public void setRequestMethod(Method requestMethod) {
this.requestMethod = requestMethod;
} public void setChunkedTransfer(boolean chunkedTransfer) {
this.chunkedTransfer = chunkedTransfer;
} /**
* Some HTTP response status codes
*/
public enum Status {
OK(200, "OK"), CREATED(201, "Created"), ACCEPTED(202, "Accepted"), NO_CONTENT(204, "No Content"), PARTIAL_CONTENT(206, "Partial Content"), REDIRECT(301,
"Moved Permanently"), NOT_MODIFIED(304, "Not Modified"), BAD_REQUEST(400, "Bad Request"), UNAUTHORIZED(401,
"Unauthorized"), FORBIDDEN(403, "Forbidden"), NOT_FOUND(404, "Not Found"), METHOD_NOT_ALLOWED(405, "Method Not Allowed"), RANGE_NOT_SATISFIABLE(416,
"Requested Range Not Satisfiable"), INTERNAL_ERROR(500, "Internal Server Error");
private final int requestStatus;
private final String description; Status(int requestStatus, String description) {
this.requestStatus = requestStatus;
this.description = description;
} public int getRequestStatus() {
return this.requestStatus;
} public String getDescription() {
return "" + this.requestStatus + " " + description;
}
}
} public static final class ResponseException extends Exception { private final Response.Status status; public ResponseException(Response.Status status, String message) {
super(message);
this.status = status;
} public ResponseException(Response.Status status, String message, Exception e) {
super(message, e);
this.status = status;
} public Response.Status getStatus() {
return status;
}
} /**
* Default strategy for creating and cleaning up temporary files.
*/
private class DefaultTempFileManagerFactory implements TempFileManagerFactory {
@Override
public TempFileManager create() {
return new DefaultTempFileManager();
}
} /**
* Handles one session, i.e. parses the HTTP request and returns the response.
*/
public interface IHTTPSession {
void execute() throws IOException; Map<String, String> getParms(); Map<String, String> getHeaders(); /**
* @return the path part of the URL.
*/
String getUri(); String getQueryParameterString(); Method getMethod(); InputStream getInputStream(); CookieHandler getCookies(); /**
* Adds the files in the request body to the files map.
* @arg files - map to modify
*/
void parseBody(Map<String, String> files) throws IOException, ResponseException;
} protected class HTTPSession implements IHTTPSession {
public static final int BUFSIZE = 8192;
private final TempFileManager tempFileManager;
private final OutputStream outputStream;
private PushbackInputStream inputStream;
private int splitbyte;
private int rlen;
private String uri;
private Method method;
private Map<String, String> parms;
private Map<String, String> headers;
private CookieHandler cookies;
private String queryParameterString; public HTTPSession(TempFileManager tempFileManager, InputStream inputStream, OutputStream outputStream) {
this.tempFileManager = tempFileManager;
this.inputStream = new PushbackInputStream(inputStream, BUFSIZE);
this.outputStream = outputStream;
} public HTTPSession(TempFileManager tempFileManager, InputStream inputStream, OutputStream outputStream, InetAddress inetAddress) {
this.tempFileManager = tempFileManager;
this.inputStream = new PushbackInputStream(inputStream, BUFSIZE);
this.outputStream = outputStream;
String remoteIp = inetAddress.isLoopbackAddress() || inetAddress.isAnyLocalAddress() ? "127.0.0.1" : inetAddress.getHostAddress().toString();
headers = new HashMap<String, String>(); headers.put("remote-addr", remoteIp);
headers.put("http-client-ip", remoteIp);
} @Override
public void execute() throws IOException {
try {
/* Read the first 8192 bytes.
The full header should fit in here.
Apache's default header limit is 8KB.
Do NOT assume that a single read will get the entire header at once!
header的最大长度为8192bytes，所以这里设置BUFSIZE为8192bytes
*/
byte[] buf = new byte[BUFSIZE];
splitbyte = 0;
rlen = 0;//总共的长度
{
int read = -1;//每次读取的长度
try {
read = inputStream.read(buf, 0, BUFSIZE);
} catch (Exception e) {
safeClose(inputStream);
safeClose(outputStream);
throw new SocketException("NanoHttpd Shutdown");
}
if (read == -1) {
// socket was been closed
safeClose(inputStream);
safeClose(outputStream);
throw new SocketException("NanoHttpd Shutdown");
}
while (read > 0) {
rlen += read;
splitbyte = findHeaderEnd(buf, rlen);
if (splitbyte > 0)//如果返回0则说明没有找到
break;
read = inputStream.read(buf, rlen, BUFSIZE - rlen);
}
}
//如果读多了，则将多余的部分重新写到流里面
if (splitbyte < rlen) {
inputStream.unread(buf, splitbyte, rlen - splitbyte);
} parms = new HashMap<String, String>();
if(null == headers) {
headers = new HashMap<String, String>();
} // Create a BufferedReader for parsing the header.
BufferedReader hin = new BufferedReader(new InputStreamReader(new ByteArrayInputStream(buf, 0, rlen))); // Decode the header into parms and header java properties
Map<String, String> pre = new HashMap<String, String>();
decodeHeader(hin, pre, parms, headers);
/**
* 取出客户端请求的方式：GET/POST
*/
method = Method.lookup(pre.get("method"));
if (method == null) {
throw new ResponseException(Response.Status.BAD_REQUEST, "BAD REQUEST: Syntax error.");
}
//请求的连接
uri = pre.get("uri"); cookies = new CookieHandler(headers); /*
* Ok, now do the serve()
* 解析
*/
Response r = serve(this);
if (r == null) {
throw new ResponseException(Response.Status.INTERNAL_ERROR, "SERVER INTERNAL ERROR: Serve() returned a null response.");
} else {
cookies.unloadQueue(r);
//响应客户端信息
r.setRequestMethod(method);
r.send(outputStream);
}
} catch (SocketException e) {
// throw it out to close socket object (finalAccept)
throw e;
} catch (SocketTimeoutException ste) {
throw ste;
} catch (IOException ioe) {
Response r = new Response(Response.Status.INTERNAL_ERROR, MIME_PLAINTEXT, "SERVER INTERNAL ERROR: IOException: " + ioe.getMessage());
r.send(outputStream);
safeClose(outputStream);
} catch (ResponseException re) {
Response r = new Response(re.getStatus(), MIME_PLAINTEXT, re.getMessage());
r.send(outputStream);
safeClose(outputStream);
} finally {
tempFileManager.clear();
}
} @Override
public void parseBody(Map<String, String> files) throws IOException, ResponseException {
RandomAccessFile randomAccessFile = null;
BufferedReader in = null;
try {
//创建临时文件
randomAccessFile = getTmpBucket(); long size;
if (headers.containsKey("content-length")) {
size = Integer.parseInt(headers.get("content-length"));
} else if (splitbyte < rlen) {
size = rlen - splitbyte;
} else {
size = 0;
} /*
* Now read all the body and write it to f
* 将流的内容写到临时文件中
*/
byte[] buf = new byte[512];
while (rlen >= 0 && size > 0) {
rlen = inputStream.read(buf, 0, (int)Math.min(size, 512));
size -= rlen;
if (rlen > 0) {
randomAccessFile.write(buf, 0, rlen);
}
} // Get the raw body as a byte []
ByteBuffer fbuf = randomAccessFile.getChannel().map(FileChannel.MapMode.READ_ONLY, 0, randomAccessFile.length());
randomAccessFile.seek(0);//重新定位到临时文件的开始位置 // Create a BufferedReader for easily reading it as string.
InputStream bin = new FileInputStream(randomAccessFile.getFD());
in = new BufferedReader(new InputStreamReader(bin)); // If the method is POST, there may be parameters
// in data section, too, read it:
if (Method.POST.equals(method)) {
String contentType = "";
String contentTypeHeader = headers.get("content-type"); StringTokenizer st = null;
if (contentTypeHeader != null) {
st = new StringTokenizer(contentTypeHeader, ",; ");
if (st.hasMoreTokens()) {
contentType = st.nextToken();
}
}
//表单提交，文件上传类型
if ("multipart/form-data".equalsIgnoreCase(contentType)) {
// Handle multipart/form-data
if (!st.hasMoreTokens()) {
throw new ResponseException(Response.Status.BAD_REQUEST, "BAD REQUEST: Content type is multipart/form-data but boundary missing. Usage: GET /example/file.html");
} String boundaryStartString = "boundary=";
int boundaryContentStart = contentTypeHeader.indexOf(boundaryStartString) + boundaryStartString.length();
String boundary = contentTypeHeader.substring(boundaryContentStart, contentTypeHeader.length());
if (boundary.startsWith("\"") && boundary.endsWith("\"")) {
boundary = boundary.substring(1, boundary.length() - 1);
}
//fbuf里面包含body的内容
decodeMultipartData(boundary, fbuf, in, parms, files);
} else {
// Handle application/x-www-form-urlencoded
String postLine = "";
StringBuilder postLineBuffer = new StringBuilder();
char pbuf[] = new char[512];
int read = in.read(pbuf);
while (read >= 0 && !postLine.endsWith("\r\n")) {
postLine = String.valueOf(pbuf, 0, read);
postLineBuffer.append(postLine);
read = in.read(pbuf);
}
postLine = postLineBuffer.toString().trim();
decodeParms(postLine, parms);
}
} else if (Method.PUT.equals(method)) {
String content = saveTmpFile(fbuf, 0, fbuf.limit());
files.put("content", content);
}
} finally {
safeClose(randomAccessFile);
safeClose(in);
}
} /**
* Decodes the sent headers and loads the data into Key/value pairs
*/
private void decodeHeader(BufferedReader in, Map<String, String> pre, Map<String, String> parms, Map<String, String> headers)
throws ResponseException {
try {
// Read the request line GET / HTTP/1.1
String inLine = in.readLine();
if (inLine == null) {
return;
}
//分隔inLine用 \t\n\r\f
StringTokenizer st = new StringTokenizer(inLine);
if (!st.hasMoreTokens()) {
throw new ResponseException(Response.Status.BAD_REQUEST, "BAD REQUEST: Syntax error. Usage: GET /example/file.html");
}
String method = st.nextToken();
pre.put("method", method);
if (!st.hasMoreTokens()) {
throw new ResponseException(Response.Status.BAD_REQUEST, "BAD REQUEST: Missing URI. Usage: GET /example/file.html");
} String uri = st.nextToken();
/*
* Decode parameters from the URI
* 以"?" 来判断是否有参数
*/
int qmi = uri.indexOf('?');
if (qmi >= 0) {//说明有参数，调用decodeParms将参数解析到parms中
decodeParms(uri.substring(qmi + 1), parms);
uri = decodePercent(uri.substring(0, qmi));
} else {
uri = decodePercent(uri);
}
// If there's another token, it's protocol version,
// followed by HTTP headers. Ignore version but parse headers.
// NOTE: this now forces header names lowercase since they are
// case insensitive and vary by client.
if (st.hasMoreTokens()) {
String line = in.readLine();
while (line != null && line.trim().length() > 0) {
int p = line.indexOf(':');
if (p >= 0)
headers.put(line.substring(0, p).trim().toLowerCase(Locale.US), line.substring(p + 1).trim());
line = in.readLine();
}
}
pre.put("uri", uri);
} catch (IOException ioe) {
throw new ResponseException(Response.Status.INTERNAL_ERROR, "SERVER INTERNAL ERROR: IOException: " + ioe.getMessage(), ioe);
}
} /**
* Decodes the Multipart Body data and put it into Key/Value pairs.
* @param boundary
* @param fbuf
* @param in
* @param parms header头里面的参数
* @param files 支持多文件上传功能
* @throws ResponseException
*/
private void decodeMultipartData(String boundary, ByteBuffer fbuf, BufferedReader in, Map<String, String> parms,
Map<String, String> files) throws ResponseException {
try {
//根据boundary获取分割线与内容的间隔位置
int[] bpositions = getBoundaryPositions(fbuf, boundary.getBytes());
int boundarycount = 2;//源码为1，如果是上传单个文件会有问题
String mpline = in.readLine();
while (mpline != null) {
if (!mpline.contains(boundary)) {
throw new ResponseException(Response.Status.BAD_REQUEST, "BAD REQUEST: Content type is multipart/form-data but next chunk does not start with boundary. Usage: GET /example/file.html");
}
boundarycount++;
Map<String, String> item = new HashMap<String, String>();
mpline = in.readLine();
while (mpline != null && mpline.trim().length() > 0) {
int p = mpline.indexOf(':');
if (p != -1) {
item.put(mpline.substring(0, p).trim().toLowerCase(Locale.US), mpline.substring(p + 1).trim());
}
mpline = in.readLine();
}
if (mpline != null) {
String contentDisposition = item.get("content-disposition");
if (contentDisposition == null) {
throw new ResponseException(Response.Status.BAD_REQUEST, "BAD REQUEST: Content type is multipart/form-data but no content-disposition info found. Usage: GET /example/file.html");
}
StringTokenizer st = new StringTokenizer(contentDisposition, "; ");
Map<String, String> disposition = new HashMap<String, String>();
while (st.hasMoreTokens()) {
String token = st.nextToken();
int p = token.indexOf('=');
if (p != -1) {
disposition.put(token.substring(0, p).trim().toLowerCase(Locale.US), token.substring(p + 1).trim());
}
}
String pname = disposition.get("name");
pname = pname.substring(1, pname.length() - 1); String value = "";
if (item.get("content-type") == null) {
while (mpline != null && !mpline.contains(boundary)) {
mpline = in.readLine();
if (mpline != null) {
int d = mpline.indexOf(boundary);
if (d == -1) {
value += mpline;
} else {
value += mpline.substring(0, d - 2);
}
}
}
} else {
if (boundarycount > bpositions.length) {
throw new ResponseException(Response.Status.INTERNAL_ERROR, "Error processing request");
}
int offset = stripMultipartHeaders(fbuf, bpositions[boundarycount - 2]);
//创建一个临时文件，然后保存内容，这个函数我们也需要重写setTempFileManagerFactory
String path = saveTmpFile(fbuf, offset, bpositions[boundarycount - 1] - offset - 4);
files.put(pname, path);
value = disposition.get("filename");
value = value.substring(1, value.length() - 1);
do {
mpline = in.readLine();
} while (mpline != null && !mpline.contains(boundary));
}
parms.put(pname, value);
}
}
} catch (IOException ioe) {
throw new ResponseException(Response.Status.INTERNAL_ERROR, "SERVER INTERNAL ERROR: IOException: " + ioe.getMessage(), ioe);
}
} /**
* Find byte index separating header from body. It must be the last byte of the first two sequential new lines.
* 找到head和body的分界点，两个回车换行
*/
private int findHeaderEnd(final byte[] buf, int rlen) {
int splitbyte = 0;
while (splitbyte + 3 < rlen) {
if (buf[splitbyte] == '\r' && buf[splitbyte + 1] == '\n' && buf[splitbyte + 2] == '\r' && buf[splitbyte + 3] == '\n') {
return splitbyte + 4;
}
splitbyte++;
}
return 0;
} /**
* Find the byte positions where multipart boundaries start.
* @param b
* @param boundary
* @return
*/
private int[] getBoundaryPositions(ByteBuffer b, byte[] boundary) {
int matchcount = 0;
int matchbyte = -1;
List<Integer> matchbytes = new ArrayList<Integer>();
for (int i = 0; i < b.limit(); i++) {
if (b.get(i) == boundary[matchcount]) {
if (matchcount == 0)
matchbyte = i;
matchcount++;
if (matchcount == boundary.length) {
matchbytes.add(matchbyte);
matchcount = 0;
matchbyte = -1;
}
} else {
i -= matchcount;
matchcount = 0;
matchbyte = -1;
}
}
int[] ret = new int[matchbytes.size()];
for (int i = 0; i < ret.length; i++) {
ret[i] = matchbytes.get(i);
}
return ret;
} /**
* Retrieves the content of a sent file and saves it to a temporary file. The full path to the saved file is returned.
*/
private String saveTmpFile(ByteBuffer b, int offset, int len) {
String path = "";
if (len > 0) {
FileOutputStream fileOutputStream = null;
try {
//这个地方的tempFileManager需要我们setTempFileManagerFactory
TempFile tempFile = tempFileManager.createTempFile();
ByteBuffer src = b.duplicate();
fileOutputStream = new FileOutputStream(tempFile.getName());
FileChannel dest = fileOutputStream.getChannel();
src.position(offset).limit(offset + len);
dest.write(src.slice());
path = tempFile.getName();
} catch (Exception e) { // Catch exception if any
System.err.println("Error: " + e.getMessage());
} finally {
safeClose(fileOutputStream);
}
}
return path;
} private RandomAccessFile getTmpBucket() {
try {
TempFile tempFile = tempFileManager.createTempFile();
return new RandomAccessFile(tempFile.getName(), "rw");
} catch (Exception e) {
System.err.println("Error: " + e.getMessage());
}
return null;
} /**
* It returns the offset separating multipart file headers from the file's data.
*/
private int stripMultipartHeaders(ByteBuffer b, int offset) {
int i;
for (i = offset; i < b.limit(); i++) {
if (b.get(i) == '\r' && b.get(++i) == '\n' && b.get(++i) == '\r' && b.get(++i) == '\n') {
break;
}
}
return i + 1;
} /**
* Decodes parameters in percent-encoded URI-format ( e.g. "name=Jack%20Daniels&pass=Single%20Malt" ) and
* adds them to given Map. NOTE: this doesn't support multiple identical keys due to the simplicity of Map.
*/
private void decodeParms(String parms, Map<String, String> p) {
if (parms == null) {
queryParameterString = "";
return;
} queryParameterString = parms;
//使用&来分隔参数
StringTokenizer st = new StringTokenizer(parms, "&");
while (st.hasMoreTokens()) {
String e = st.nextToken();
int sep = e.indexOf('=');
if (sep >= 0) {
/*
* 这里使用decodePercent来解析，防止参数里面带有中文
* 比如“张杰”那么浏览器会写成%E5%BC%A0%E6%9D%B0
*/
p.put(decodePercent(e.substring(0, sep)).trim(),
decodePercent(e.substring(sep + 1)));
} else {
p.put(decodePercent(e).trim(), "");
}
}
} @Override
public final Map<String, String> getParms() {
return parms;
} public String getQueryParameterString() {
return queryParameterString;
} @Override
public final Map<String, String> getHeaders() {
return headers;
} @Override
public final String getUri() {
return uri;
} @Override
public final Method getMethod() {
return method;
} @Override
public final InputStream getInputStream() {
return inputStream;
} @Override
public CookieHandler getCookies() {
return cookies;
}
} public static class Cookie {
private String n, v, e; public Cookie(String name, String value, String expires) {
n = name;
v = value;
e = expires;
} public Cookie(String name, String value) {
this(name, value, 30);
} public Cookie(String name, String value, int numDays) {
n = name;
v = value;
e = getHTTPTime(numDays);
} public String getHTTPHeader() {
String fmt = "%s=%s; expires=%s";
return String.format(fmt, n, v, e);
} public static String getHTTPTime(int days) {
Calendar calendar = Calendar.getInstance();
SimpleDateFormat dateFormat = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z", Locale.US);
dateFormat.setTimeZone(TimeZone.getTimeZone("GMT"));
calendar.add(Calendar.DAY_OF_MONTH, days);
return dateFormat.format(calendar.getTime());
}
} /**
* Provides rudimentary support for cookies.
* Doesn't support 'path', 'secure' nor 'httpOnly'.
* Feel free to improve it and/or add unsupported features.
*
* @author LordFokas
*/
public class CookieHandler implements Iterable<String> {
private HashMap<String, String> cookies = new HashMap<String, String>();
private ArrayList<Cookie> queue = new ArrayList<Cookie>(); public CookieHandler(Map<String, String> httpHeaders) {
String raw = httpHeaders.get("cookie");
if (raw != null) {
String[] tokens = raw.split(";");
for (String token : tokens) {
String[] data = token.trim().split("=");
if (data.length == 2) {
cookies.put(data[0], data[1]);
}
}
}
} @Override public Iterator<String> iterator() {
return cookies.keySet().iterator();
} /**
* Read a cookie from the HTTP Headers.
*
* @param name The cookie's name.
* @return The cookie's value if it exists, null otherwise.
*/
public String read(String name) {
return cookies.get(name);
} /**
* Sets a cookie.
*
* @param name The cookie's name.
* @param value The cookie's value.
* @param expires How many days until the cookie expires.
*/
public void set(String name, String value, int expires) {
queue.add(new Cookie(name, value, Cookie.getHTTPTime(expires)));
} public void set(Cookie cookie) {
queue.add(cookie);
} /**
* Set a cookie with an expiration date from a month ago, effectively deleting it on the client side.
*
* @param name The cookie name.
*/
public void delete(String name) {
set(name, "-delete-", -30);
} /**
* Internally used by the webserver to add all queued cookies into the Response's HTTP Headers.
*
* @param response The Response object to which headers the queued cookies will be added.
*/
public void unloadQueue(Response response) {
for (Cookie cookie : queue) {
response.addHeader("Set-Cookie", cookie.getHTTPHeader());
}
}
}
}
我们测试的时候需要自己定义的类：
package com.sohu.nanohttpd; import android.app.Activity;
import android.os.Bundle;
import android.util.Log; public class MainActivity extends Activity { @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); NanoHTTPD nanoHttpd = new MyNanoHTTPD("127.0.0.1",23456);
try{
nanoHttpd.start();
}catch(Exception e){
e.printStackTrace();
} Log.e("DEMO",nanoHttpd.isAlive()+""); } } class MyNanoHTTPD extends NanoHTTPD{ public MyNanoHTTPD(int port) {
super(port);
} public MyNanoHTTPD(String hostName,int port){
super(hostName,port);
} public Response serve(IHTTPSession session) {
Method method = session.getMethod();
Log.e("DEMO","Method:"+method.toString());
if(NanoHTTPD.Method.GET.equals(method)){
//get方式
String queryParams = session.getQueryParameterString();
Log.e("DEMO","params:"+queryParams);
}else if(NanoHTTPD.Method.POST.equals(method)){
//post方式
}
return super.serve(session);
} }
这里只是做了一下拓展知识，两种方式搭建都可以的，但是明显Apache的功能强大一点。。
测试项目的下载地址：
Android测试项目HttpServer下载地址
http://download.csdn.net/detail/jiangwei0910410003/7432533
PC端的Server测试项目HttpServer下载地址
http://download.csdn.net/detail/jiangwei0910410003/7432537
Android测试项目NanoHTTPD下载地址
http://download.csdn.net/detail/jiangwei0910410003/7432595
总结：上面就是将PC端的Cookie和移动端的imei进行绑定的操作，这种操作的价值是很大的，未来如果用户在家里面进行上网的话，我们就可以将PC端和移动端进行紧密耦合在一起，相当于一个整体。。这样我们对用户的行为就更加了解了。。
Android中如何搭建一个WebServer的更多相关文章
- 在Android中动画移动一个View的位置，采用Scroller类实现Android动画之 View移动
在Android中动画移动一个View的位置,采用Scroller类实现 今天说最近自己遇到的一个问题,就是要用动画效果来移动一个VIew的位置. 这个具体的情况是,需要做一个SlidingMenu的 ...
- Android中Service的一个Demo例子
Android中Service的一个Demo例子 Service组件是Android系统重要的一部分,网上看了代码,很简单,但要想熟练使用还是需要Coding. 本文,主要贴代码,不对Servic ...
- Android在如何建立一个WebServer
今天老板交待任务最终完成了,感觉收获颇多,所以写一个关于它的记录,首先,看一下.老板的需求 需求: 希望移动端的用户标识(IMEI)和HTML页面的用户标识(Cookie)连接起来,当中HTML页面可 ...
- Android中的第一个NDK的例子
前几天研究了JNI技术后,想在Android上试一试研究结果,查阅了很多资料后,总结如下步骤: 首先来看一下什么是NDK NDK 提供了一系列的工具,帮助开发者快速开发C(或C++)的动态库,并能自动 ...
- 浅谈android中只使用一个TextView实现高仿京东,淘宝各种倒计时
今天给大家带来的是只使用一个TextView实现一个高仿京东.淘宝.唯品会等各种电商APP的活动倒计时.近期公司一直加班也没来得及时间去整理,今天难得歇息想把这个分享给大家.只求共同学习,以及自己兴许 ...
- Android中自己定义一个shade.xml
自己定义一个shade: <shape> <!-- 实心 --> <solid android:color="#ff9d77"/> <!- ...
- Android 中如何从一个App启动另外一个App（如启动支付界面、启动地图界面、应用商场下载App等场景）
假定两个App,分别是A和B,当A运行某个功能需要启动B,一种是启动B应用,一种直接进入B的某个Activity.搜了很多资料,没有一个完整的.下面就A--Android5.1.1.B--Androi ...
- Android中调用另一个Activity并返回结果-以模拟选择头像功能为例
场景 Android中点击按钮启动另一个Activity以及Activity之间传值: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/detail ...
- iOS 10中如何搭建一个语音转文字框架
在2016WWDC大会上,Apple公司介绍了一个很好的语音识别的API,那就是Speech framework.事实上,这个Speech Kit就是Siri用来做语音识别的框架.如今已经有一些可用的 ...
随机推荐
- boost multi index
Boost.MultiIndex makes it possible to define containers that support an arbitrary number of interfac ...
- shell倒计时下班时间
#!/bin/sh offWorkTime="19:00:00" offWorkHour=${offWorkTime::} offWorkMinute=${offWorkTime: ...
- [CSP模拟测试43、44]题解
状态极差的两场.感觉现在自己的思维方式很是有问题. (但愿今天考试开始的一刻我不会看到H I J) A 考场上打了最短路+贪心,水了60. 然而正解其实比那30分贪心好想多了. 进行n次乘法后的结果一 ...
- Linux桌面与命令行切换
1.首先在安装Linux的时候是选则Desktop桌面方式安装 2.切换命令 2.1快捷键:Ctrl+Alt+F1 切换到桌面模式 Ctrl+Alt+F3 切换到命令行模式
- 2019牛客第八场多校 E_Explorer 可撤销并查集(栈)+线段树
目录 题意: 分析: @(2019牛客暑期多校训练营(第八场)E_Explorer) 题意: 链接 题目类似:CF366D,Gym101652T 本题给你\(n(100000)\)个点\(m(1000 ...
- cs224d 作业 problem set2 (二) TensorFlow 实现命名实体识别
神经网络在命名实体识别中的应用 所有的这些包括之前的两篇都可以通过tensorflow 模型的托管部署到 google cloud 上面,发布成restful接口,从而与任何的ERP,CRM系统集成. ...
- javascript实现继承的六种方式
/*实现继承的六种方式*/ /*1.扩展原型对象的方法实现继承*/ function Foo1(){} //在Foo1函数上扩展一个fn1方法,由构造函数创建的对象都具有fn1这个方法 Foo1. ...
- Java DOM解析器 - 修改XML文档
这是我们需要修改的输入XML文件: 1 2 3 4 5 6 7 8 9 10 11 12 <?xml version="1.0" encoding="UTF-8&q ...
- @RequestParam 引发的编译问题
在使用SpringMVC绑定基本类型(如String,Integer等)参数时,应通过@RequestParam注解指定具体的参数名称,否则,当源代码在非debug模式下编译后,运行时会引发Handl ...
- 深浅拷贝, for循环小知识点 str操作 list的删除问题,类型转换
深浅拷⻉ : lst1 = ["⾦⽑狮王", "紫衫⻰王", "⽩眉鹰王", "⻘翼蝠王"] lst2 = lst1 ...