Using NanoHTTPD in Android

Question

I am trying to use NanoHTTP to serve up an HTML file. However, NanoHTTP is relatively un-documented, and I am new to Android. My question is, where do I store the html file, and how specifically can I serve it up using NanoHTTP.

Answer 1

A late answer but may be useful to others.

Here is a simple hello Web Server, not exactly what you ask, but you can continue from here. The following program supposes you have a www directory in the root of the SD Card and a file index.html inside.

Main activity 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);         }     }  } 

Obviously the NanoHTTPD class must be in the same package.

You need to grant internet permission in AndroidManifest.xml.

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

and read external storage permission.

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

EDIT: To access the server open you web browser with the IP of your device, e.g. 192.168.1.20:8080.

NOTES:

• Tested in Android 2.3
• The use of port 80 is restricted to the root user(http://www.mail-archive.com/[email protected]/msg47377.html).

Answer 2

Pretty good source code can be found here: https://github.com/Teaonly/android-eye

Chceck assets folder where html and JavaScript files are stored https://github.com/Teaonly/android-eye/tree/master/assets

TeaServer - server implementation https://github.com/Teaonly/android-eye/blob/master/src/teaonly/droideye/TeaServer.java

MainActivity - server initialization https://github.com/Teaonly/android-eye/blob/master/src/teaonly/droideye/MainActivity.java