org - android http server

Usando NanoHTTPD en Android

Question

Estoy tratando de usar NanoHTTP para servir un archivo HTML. Sin embargo, NanoHTTP está relativamente sin documentar, y soy nuevo en Android. Mi pregunta es, dónde guardo el archivo html y cómo puedo servirlo usando NanoHTTP.

Answer 1

El código fuente bastante bueno se puede encontrar aquí: https://github.com/Teaonly/android-eye

Carpeta de activos Chceck donde se almacenan los archivos html y JavaScript https://github.com/Teaonly/android-eye/tree/master/assets

TeaServer: implementación del servidor https://github.com/Teaonly/android-eye/blob/master/src/teaonly/droideye/TeaServer.java

MainActivity - inicialización del servidor https://github.com/Teaonly/android-eye/blob/master/src/teaonly/droideye/MainActivity.java

Answer 2

Clase actualizada de WebServer (vea la respuesta de rendon) que funciona con la versión actual 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);
    }

}

Answer 3

Intenta esto ... Crea 2 paquetes (actividad, utilidad), solo para la organización En actividad crea la clase MainActivity.java in util crea la clase 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);
        }
    }

}

En 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" );
    }
}

No te olvides de 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" />

Y última

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>

Answer 4

Una respuesta tardía, pero puede ser útil para otros.

Aquí hay un servidor web simple, no es exactamente lo que preguntas, pero puedes continuar desde aquí. El siguiente programa supone que tiene un directorio www en la raíz de la tarjeta SD y un archivo index.html adentro.

Actividad principal 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);
        }
    }

}

Obviamente, la clase NanoHTTPD debe estar en el mismo paquete.

Debes otorgar permiso de Internet en AndroidManifest.xml .

<uses-permission android:name="android.permission.INTERNET" />

y lea el permiso de almacenamiento externo.

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

EDITAR: para acceder al servidor, abra su navegador web con la IP de su dispositivo, por ejemplo, 192.168.1.20:8080 .

NOTAS:

• Probado en Android 2.3
• El uso del puerto 80 está restringido al usuario raíz ( http://www.mail-archive.com/[email protected]/msg47377.html ).