Utilisation de NanoHTTPD dans Android
J'essaie d'utiliser NanoHTTP pour servir un fichier HTML. Cependant, NanoHTTP est relativement non documenté, et je suis nouveau sur Android. Ma question est, où puis-je stocker le fichier html, et comment puis-je le servir spécifiquement en utilisant NanoHTTP.
Une réponse tardive mais peut être utile aux autres.
Voici un simple serveur Web bonjour, pas exactement ce que vous demandez, mais vous pouvez continuer à partir d'ici. Le programme suivant suppose que vous avez un répertoire www à la racine de la carte SD et un fichier index.html à l'intérieur.
Activité principale Httpd.Java:
package com.inforscience.web;
import Android.app.Activity;
import Android.os.Bundle;
import Android.os.Environment;
import Android.util.Log;
import Java.io.*;
import Java.util.*;
public class Httpd extends Activity
{
private WebServer server;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
server = new WebServer();
try {
server.start();
} catch(IOException ioe) {
Log.w("Httpd", "The server could not start.");
}
Log.w("Httpd", "Web server initialized.");
}
// DON'T FORGET to stop the server
@Override
public void onDestroy()
{
super.onDestroy();
if (server != null)
server.stop();
}
private class WebServer extends NanoHTTPD {
public WebServer()
{
super(8080);
}
@Override
public Response serve(String uri, Method method,
Map<String, String> header,
Map<String, String> parameters,
Map<String, String> files) {
String answer = "";
try {
// Open file from SD Card
File root = Environment.getExternalStorageDirectory();
FileReader index = new FileReader(root.getAbsolutePath() +
"/www/index.html");
BufferedReader reader = new BufferedReader(index);
String line = "";
while ((line = reader.readLine()) != null) {
answer += line;
}
reader.close();
} catch(IOException ioe) {
Log.w("Httpd", ioe.toString());
}
return new NanoHTTPD.Response(answer);
}
}
}
Évidemment, la classe NanoHTTPD doit être dans le même package.
Vous devez accorder une autorisation Internet dans AndroidManifest.xml.
<uses-permission Android:name="Android.permission.INTERNET" />
et lire l'autorisation de stockage externe.
<uses-permission Android:name="Android.permission.WRITE_EXTERNAL_STORAGE"/>
EDIT: Pour accéder au serveur, ouvrez votre navigateur Web avec l'IP de votre appareil, par ex. 192.168.1.20:8080.
REMARQUES:
- Testé en Android 2.3
- L'utilisation du port 80 est réservée à l'utilisateur root ( http://www.mail-archive.com/[email protected]/msg47377.html ).
Un assez bon code source peut être trouvé ici: https://github.com/Teaonly/Android-eye
Dossier d'actifs Chceck où les fichiers html et JavaScript sont stockés https://github.com/Teaonly/Android-eye/tree/master/assets
TeaServer - implémentation du serveur https://github.com/Teaonly/Android-eye/blob/master/src/teaonly/droideye/TeaServer.Java
MainActivity - initialisation du serveur https://github.com/Teaonly/Android-eye/blob/master/src/teaonly/droideye/MainActivity.Java
Classe WebServer mise à jour (voir la réponse de rendon) qui fonctionne avec la version actuelle de NanoHTTPD:
private class WebServer extends NanoHTTPD {
public WebServer() {
super(8080);
}
@Override
public Response serve(IHTTPSession session) {
String answer = "";
try {
// Open file from SD Card
File root = Environment.getExternalStorageDirectory();
FileReader index = new FileReader(root.getAbsolutePath() +
"/www/index.html");
BufferedReader reader = new BufferedReader(index);
String line = "";
while ((line = reader.readLine()) != null) {
answer += line;
}
reader.close();
} catch(IOException ioe) {
Log.w("Httpd", ioe.toString());
}
return newFixedLengthResponse(answer);
}
}
Jetez un œil à la façon dont je sers les fichiers HTML et les autres types de fichiers. J'ai une classe AndroidWebServer qui étend la classe Nanohttpd. Ceci est ma méthode de réponse ->
public Response serve(IHTTPSession session) {
String uri=session.getUri();
String msg = "<html><body><h1>Hello server</h1>\n";
File [] arrayfile;
int i=0;
try{
session.parseBody(new HashMap<String, String>());
}catch (ResponseException | IOException r){
r.printStackTrace();
}
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 += "<br><br><a href='/Open_rap'>Open Image of Lionel Messi</a><br><br>";
msg += "<br><br><a href='/files'>Browse Files</a><br><br>";
msg += "<br><br><a href='/getmethod'>GET METHOD OPERATION</a><br><br>";
msg += "<br><br><a href='/postmethod'>POST METHOD OPERATION</a><br><br>";
msg += "<br><br><a href='/jquery'>JQUERY OPERATION</a><br><br>";
if(uri.equals("/hello")){
String response="Hello World";
return newFixedLengthResponse(response);
}
else if(uri.equals("/getmethod")){
String html="<html><head><h1>Welcome to the Form</h1><head/><body>";
if(parms.get("name")==null){
html +="<form action='' method='get'> \n " +
"<p>Enter Your Name:</p> <input type='text' name='name'>" +
"</form>" +
"</body>";
}
else{
html +="<p>Hello Mr. "+ parms.get("name") +"</p>"+
"</body> ";
}
html +="</html>";
return newFixedLengthResponse(html);
}
else if(uri.equals("/postmethod")){
String html="<html><head><h1>Welcome to the Form</h1><head/><body>";
Map<String, String> files = new HashMap<String, String>();
Method method = session.getMethod();
String postParameter="";
html +="<form action='' method='post'> \n " +
"<p>Enter Your Name:</p> <input type='text' name='name'>" +
"</form>";
if (Method.POST.equals(method) || Method.PUT.equals(method)) {
try {
session.parseBody(files);
} catch (IOException ioe) {
try {
// return newFixedLengthResponse(Response.Status.INTERNAL_ERROR, MIME_PLAINTEXT, "SERVER INTERNAL ERROR: IOException: " + ioe.getMessage());
} catch (Exception e) {
e.printStackTrace();
Log.d("Exception", e.getMessage());
}
} catch (ResponseException re) {
try {
// return newFixedLengthResponse(re.getStatus(), MIME_PLAINTEXT, re.getMessage());
} catch (Exception e) {
e.printStackTrace();
Log.d("Exception", re.getMessage());
}
}
}
html +="</body></html>";
String postBody = session.getQueryParameterString();
postParameter = session.getParms().get("name");
Log.d("Postbody",postBody+"\n"+postParameter);
if(postParameter!=null){
String html1="<html><head><h1>"+ postParameter +"</h1><head></html>";
return newFixedLengthResponse(html1);
}
return newFixedLengthResponse(Response.Status.OK,"text/html",html);
}
else if(uri.equals("/Open_rap")){
File root= Environment.getExternalStorageDirectory();
FileInputStream fis = null;
File file = new File(root.getAbsolutePath() + "/www/messi.jpg");
Log.d("Path",root.getAbsolutePath());
try{
if(file.exists())
{
fis = new FileInputStream(file);
}
else
Log.d("FOF :", "File Not exists:");
}catch (FileNotFoundException e)
{
e.printStackTrace();
}
return newFixedLengthResponse(Response.Status.OK,"image/jpeg",fis, file.length() );
}
else {
return newFixedLengthResponse(msg + "</body></html>\n");
}
}
Comme vous pouvez le voir, j'ai implémenté GET et POST. Vous pouvez les trouver dans cette partie du code uri.equals("/getmethod") et uri.equals("/getmethod").
De plus, vous pouvez voir la partie -> uri.equals("/openrap"), ici je sers un fichier JPG au navigateur du client et l'image est présente dans le répertoire interne à /www/ dossier.
Envoyez-moi un ping si vous avez des doutes.
Essayez ceci ... Créez 2 packages (activité, util), uniquement pour l'organisation En activité, créez la classe MainActivity.Java dans util créez la classe AndroidWebServer.Java
package awserverfatepi.com.activity;
import Android.content.BroadcastReceiver;
import Android.content.Context;
import Android.content.DialogInterface;
import Android.content.Intent;
import Android.content.IntentFilter;
import Android.net.ConnectivityManager;
import Android.net.NetworkInfo;
import Android.net.wifi.WifiManager;
import Android.support.design.widget.CoordinatorLayout;
import Android.support.design.widget.FloatingActionButton;
import Android.support.design.widget.Snackbar;
import Android.support.v4.content.ContextCompat;
import Android.support.v7.app.AlertDialog;
import Android.support.v7.app.AppCompatActivity;
import Android.os.Bundle;
import Android.view.KeyEvent;
import Android.view.View;
import Android.widget.EditText;
import Android.widget.TextView;
import awserverfatepi.com.R;
import awserverfatepi.com.util.AndroidWebServer;
public class MainActivity extends AppCompatActivity {
private static final int DEFAULT_PORT = 8080;
private AndroidWebServer androidWebServer;
private BroadcastReceiver broadcastReceiverNetworkState;
private static boolean isStarted = false;
private CoordinatorLayout coordinatorLayout;
private EditText editTextPort;
private FloatingActionButton floatingActionButtonOnOff;
private View textViewMessage;
private TextView textViewIpAccess;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initGui();
setIpAccess();
floatingActionButtonOnOff = (FloatingActionButton) findViewById(R.id.floatingActionButtonOnOff);
floatingActionButtonOnOff.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (isConnectedInWifi()) {
if (!isStarted && startAndroidWebServer()) {
isStarted = true;
textViewMessage.setVisibility(View.VISIBLE);
floatingActionButtonOnOff.setBackgroundTintList(ContextCompat.getColorStateList(MainActivity.this,
R.color.colorGreen));
editTextPort.setEnabled(false);
} else if (stopAndroidWebServer()) {
isStarted = false;
textViewMessage.setVisibility(View.INVISIBLE);
floatingActionButtonOnOff.setBackgroundTintList(ContextCompat.getColorStateList(MainActivity.this,
R.color.colorRed));
editTextPort.setEnabled(true);
}
} else {
Snackbar.make(coordinatorLayout, getString(R.string.wifi_message), Snackbar.LENGTH_LONG).show();
}
}
});
initBroadcastReceiverNetworkStateChanged();
}
private void initGui() {
coordinatorLayout = (CoordinatorLayout) findViewById(R.id.coordinatorLayout);
editTextPort = (EditText) findViewById(R.id.editTextPort);
textViewMessage = findViewById(R.id.textViewMessage);
textViewIpAccess = (TextView) findViewById(R.id.textViewIpAccess);
}
private boolean startAndroidWebServer() {
if (!isStarted) {
int port = getPortFromEditText();
try {
if (port == 0) {
throw new Exception();
}
androidWebServer = new AndroidWebServer(port);
androidWebServer.start();
return true;
} catch (Exception e) {
e.printStackTrace();
Snackbar.make(coordinatorLayout, "A porta " + port + " não está funcionando, por favor altere para outra no intervalo" +
" entre 1000 e 9999.", Snackbar.LENGTH_LONG).show();
}
}
return false;
}
private boolean stopAndroidWebServer() {
if (isStarted && androidWebServer != null) {
androidWebServer.stop();
return true;
}
return false;
}
private void setIpAccess() {
textViewIpAccess.setText(getIpAccess());
}
private void initBroadcastReceiverNetworkStateChanged() {
final IntentFilter filters = new IntentFilter();
filters.addAction("Android.net.wifi.WIFI_STATE_CHANGED");
filters.addAction("Android.net.wifi.STATE_CHANGE");
broadcastReceiverNetworkState = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
setIpAccess();
}
};
super.registerReceiver(broadcastReceiverNetworkState, filters);
}
private String getIpAccess() {
WifiManager wifiManager = (WifiManager) getSystemService(WIFI_SERVICE);
int ipAddress = wifiManager.getConnectionInfo().getIpAddress();
final String formatedIpAddress = String.format("%d.%d.%d.%d", (ipAddress & 0xff), (ipAddress >> 8 & 0xff),
(ipAddress >> 16 & 0xff), (ipAddress >> 24 & 0xff));
return "http://" + formatedIpAddress + ":";
}
private int getPortFromEditText() {
String valueEditText = editTextPort.getText().toString();
return (valueEditText.length() > 0) ? Integer.parseInt(valueEditText) : DEFAULT_PORT;
}
public boolean isConnectedInWifi() {
WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
NetworkInfo networkInfo = ((ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE)).getActiveNetworkInfo();
if (networkInfo != null && networkInfo.isAvailable() && networkInfo.isConnected()
&& wifiManager.isWifiEnabled() && networkInfo.getTypeName().equals("WIFI")) {
return true;
}
return false;
}
public boolean onKeyDown(int keyCode, KeyEvent evt) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (isStarted) {
new AlertDialog.Builder(this)
.setTitle(R.string.warning)
.setMessage(R.string.dialog_exit_message)
.setPositiveButton(getResources().getString(Android.R.string.ok), new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
finish();
}
})
.setNegativeButton(getResources().getString(Android.R.string.cancel), null)
.show();
} else {
finish();
}
return true;
}
return false;
}
@Override
protected void onDestroy() {
super.onDestroy();
stopAndroidWebServer();
isStarted = false;
if (broadcastReceiverNetworkState != null) {
unregisterReceiver(broadcastReceiverNetworkState);
}
}
}
Dans AndroidWebserver.Java
package awserverfatepi.com.util;
import Java.util.Map;
import fi.iki.elonen.NanoHTTPD;
public class AndroidWebServer extends NanoHTTPD {
public AndroidWebServer(int port) {
super(port);
}
public AndroidWebServer(String hostname, int port) {
super(hostname, port);
}
@Override
public Response serve(IHTTPSession session) {
String msg = "<html><body><h1>Hello World</h1>\n";
Map<String, String> parms = session.getParms();
if (parms.get("username") == null) {
msg += "<form action='?' method='get'>\n <p>Seu nome: <input type='text' name='username'></p>\n" + "</form>\n";
} else {
msg += "<p>Hello, " + parms.get("username") + "!</p>";
}
return newFixedLengthResponse( msg + "</body></html>\n" );
}
}
N'oubliez pas Manifest.xml
<uses-permission Android:name="Android.permission.INTERNET" />
<uses-permission Android:name="Android.permission.ACCESS_WIFI_STATE" />
<uses-permission Android:name="Android.permission.ACCESS_NETWORK_STATE" />
<uses-permission Android:name="Android.permission.WRITE_EXTERNAL_STORAGE" />
Enfin
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<Android.support.design.widget.CoordinatorLayout xmlns:Android="http://schemas.Android.com/apk/res/Android"
xmlns:app="http://schemas.Android.com/apk/res-auto"
Android:id="@+id/coordinatorLayout"
Android:layout_width="match_parent"
Android:layout_height="match_parent">
<LinearLayout
Android:layout_width="match_parent"
Android:layout_height="match_parent"
Android:orientation="vertical">
<ImageView
Android:layout_width="match_parent"
Android:layout_height="150dp"
Android:scaleType="centerCrop"
Android:src="@drawable/header" />
<LinearLayout
Android:layout_width="match_parent"
Android:layout_height="0dp"
Android:layout_weight="1"
Android:background="@color/colorPrimaryLight"
Android:gravity="center"
Android:orientation="vertical">
<LinearLayout
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:orientation="horizontal">
<TextView
Android:id="@+id/textViewIpAccess"
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:text="http://000.000.000.000:"
Android:textColor="@Android:color/white"
Android:textSize="20sp"
Android:textStyle="bold" />
<EditText
Android:id="@+id/editTextPort"
Android:layout_width="60dp"
Android:layout_height="wrap_content"
Android:gravity="center"
Android:hint="8080"
Android:inputType="numberDecimal"
Android:maxLength="4"
Android:text="8080"
Android:textColor="@Android:color/white"
Android:textSize="20sp"
Android:textStyle="bold" />
</LinearLayout>
<TextView
Android:id="@+id/textViewMessage"
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:layout_marginLeft="50dp"
Android:layout_marginRight="50dp"
Android:layout_marginTop="50dp"
Android:gravity="center"
Android:text="@string/message"
Android:textColor="@Android:color/white"
Android:textSize="18sp"
Android:visibility="invisible" />
</LinearLayout>
</LinearLayout>
<Android.support.design.widget.FloatingActionButton
Android:id="@+id/floatingActionButtonOnOff"
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:layout_gravity="end|bottom"
Android:layout_margin="16dp"
Android:elevation="4dp"
Android:src="@drawable/on_btn"
app:backgroundTint="@color/colorRed" />
</Android.support.design.widget.CoordinatorLayout>