Java tutorial
/* * Copyright (C) 2011-2012 GUIGUI Simon, fyhertz@gmail.com * * This file is part of Spydroid (http://code.google.com/p/spydroid-ipcamera/) * * Spydroid is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * This source code is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this source code; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ package net.facework.core.http; import static net.facework.core.http.TinyHttpServer.TAG; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.net.URLDecoder; import java.util.Date; import java.util.Locale; import org.apache.http.HttpEntity; import org.apache.http.HttpEntityEnclosingRequest; import org.apache.http.HttpException; import org.apache.http.HttpRequest; import org.apache.http.HttpResponse; import org.apache.http.HttpStatus; import org.apache.http.MethodNotSupportedException; import org.apache.http.entity.AbstractHttpEntity; import org.apache.http.entity.ContentProducer; import org.apache.http.entity.EntityTemplate; import org.apache.http.entity.InputStreamEntity; import org.apache.http.impl.cookie.DateParseException; import org.apache.http.impl.cookie.DateUtils; import org.apache.http.protocol.HttpContext; import org.apache.http.protocol.HttpRequestHandler; import org.apache.http.util.EntityUtils; import android.content.res.AssetFileDescriptor; import android.content.res.AssetManager; import android.util.Log; /** * * Serves the content of assets/www * */ public class ModAssetServer implements HttpRequestHandler { public static final String PATTERN = "*"; /** The list of MIME Media Types supported by the server. */ public static String[] mimeMediaTypes = new String[] { "htm", "text/html", "html", "text/html", "gif", "image/gif", "jpg", "image/jpeg", "png", "image/png", "js", "text/javascript", "json", "text/json", "css", "text/css" }; private final TinyHttpServer mServer; private final AssetManager mAssetManager; public ModAssetServer(TinyHttpServer server) { super(); mServer = server; mAssetManager = mServer.mContext.getAssets(); } @Override public void handle(final HttpRequest request, final HttpResponse response, final HttpContext context) throws HttpException, IOException { AbstractHttpEntity body = null; final String method = request.getRequestLine().getMethod().toUpperCase(Locale.ENGLISH); if (!method.equals("GET") && !method.equals("HEAD") && !method.equals("POST")) { throw new MethodNotSupportedException(method + " method not supported"); } final String url = URLDecoder.decode(request.getRequestLine().getUri()); if (request instanceof HttpEntityEnclosingRequest) { HttpEntity entity = ((HttpEntityEnclosingRequest) request).getEntity(); byte[] entityContent = EntityUtils.toByteArray(entity); Log.d(TAG, "Incoming entity content (bytes): " + entityContent.length); } final String location = "www" + (url.equals("/") ? "/index.htm" : url); response.setStatusCode(HttpStatus.SC_OK); try { Log.i(TAG, "Requested: \"" + url + "\""); // Compares the Last-Modified date header (if present) with the If-Modified-Since date if (request.containsHeader("If-Modified-Since")) { try { Date date = DateUtils.parseDate(request.getHeaders("If-Modified-Since")[0].getValue()); if (date.compareTo(mServer.mLastModified) <= 0) { // The file has not been modified response.setStatusCode(HttpStatus.SC_NOT_MODIFIED); return; } } catch (DateParseException e) { e.printStackTrace(); } } // We determine if the asset is compressed try { AssetFileDescriptor afd = mAssetManager.openFd(location); // The asset is not compressed FileInputStream fis = new FileInputStream(afd.getFileDescriptor()); fis.skip(afd.getStartOffset()); body = new InputStreamEntity(fis, afd.getDeclaredLength()); Log.d(TAG, "Serving uncompressed file " + "www" + url); } catch (FileNotFoundException e) { // The asset may be compressed // AAPT compresses assets so first we need to uncompress them to determine their length InputStream stream = mAssetManager.open(location, AssetManager.ACCESS_STREAMING); ByteArrayOutputStream buffer = new ByteArrayOutputStream(64000); byte[] tmp = new byte[4096]; int length = 0; while ((length = stream.read(tmp)) != -1) buffer.write(tmp, 0, length); body = new InputStreamEntity(new ByteArrayInputStream(buffer.toByteArray()), buffer.size()); stream.close(); Log.d(TAG, "Serving compressed file " + "www" + url); } body.setContentType(getMimeMediaType(url) + "; charset=UTF-8"); response.addHeader("Last-Modified", DateUtils.formatDate(mServer.mLastModified)); } catch (IOException e) { // File does not exist response.setStatusCode(HttpStatus.SC_NOT_FOUND); body = new EntityTemplate(new ContentProducer() { @Override public void writeTo(final OutputStream outstream) throws IOException { OutputStreamWriter writer = new OutputStreamWriter(outstream, "UTF-8"); writer.write("<html><body><h1>"); writer.write("File "); writer.write("www" + url); writer.write(" not found"); writer.write("</h1></body></html>"); writer.flush(); } }); Log.d(TAG, "File " + "www" + url + " not found"); body.setContentType("text/html; charset=UTF-8"); } response.setEntity(body); } private String getMimeMediaType(String fileName) { String extension = fileName.substring(fileName.lastIndexOf(".") + 1, fileName.length()); for (int i = 0; i < mimeMediaTypes.length; i += 2) { if (mimeMediaTypes[i].equals(extension)) return mimeMediaTypes[i + 1]; } return mimeMediaTypes[0]; } }