342 lines
12 KiB
Java
342 lines
12 KiB
Java
package com.cradle.iitc_mobile;
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import android.app.Activity;
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import android.content.ActivityNotFoundException;
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import android.content.Intent;
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import android.content.SharedPreferences;
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import android.content.res.AssetManager;
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import android.net.Uri;
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import android.os.Environment;
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import android.preference.PreferenceManager;
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import android.util.Base64;
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import android.util.Base64OutputStream;
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import android.webkit.WebResourceResponse;
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import android.widget.Toast;
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import com.cradle.iitc_mobile.IITC_Mobile.ResponseHandler;
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import org.json.JSONObject;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.io.PipedInputStream;
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import java.io.PipedOutputStream;
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import java.net.URL;
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import java.net.URLEncoder;
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import java.util.HashMap;
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public class IITC_FileManager {
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private static final WebResourceResponse EMPTY =
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new WebResourceResponse("text/plain", "UTF-8", new ByteArrayInputStream("".getBytes()));
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private static final String WRAPPER_NEW = "wrapper(info);";
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private static final String WRAPPER_OLD =
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"script.appendChild(document.createTextNode('('+ wrapper +')('+JSON.stringify(info)+');'));\n"
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+ "(document.body || document.head || document.documentElement).appendChild(script);";
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public static final String DOMAIN = ".iitcm.localhost";
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/**
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* copies the contents of a stream into another stream and (optionally) closes the output stream afterwards
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*
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* @param inStream
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* the stream to read from
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* @param outStream
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* the stream to write to
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* @param closeOutput
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* whether to close the output stream when finished
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*
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* @throws IOException
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*/
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public static void copyStream(final InputStream inStream, final OutputStream outStream, final boolean closeOutput)
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throws IOException
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{
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// in case Android includes Apache commons IO in the future, this function should be replaced by IOUtils.copy
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final int bufferSize = 1024;
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final byte[] buffer = new byte[bufferSize];
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int len = 0;
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try {
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while ((len = inStream.read(buffer)) != -1) {
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outStream.write(buffer, 0, len);
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}
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} finally {
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if (outStream != null && closeOutput)
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outStream.close();
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}
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}
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public static String readStream(final InputStream stream) {
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final ByteArrayOutputStream os = new ByteArrayOutputStream();
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final byte[] buffer = new byte[4096];
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try {
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while (true) {
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final int read = stream.read(buffer);
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if (read == -1)
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break;
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os.write(buffer, 0, read);
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}
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} catch (final IOException e) {
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Log.w(e);
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return "";
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}
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return os.toString();
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}
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public static HashMap<String, String> getScriptInfo(final String js) {
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final HashMap<String, String> map = new HashMap<String, String>();
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String header = "";
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if (js != null && js.contains("==UserScript==") && js.contains("==/UserScript==")) {
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header = js.substring(js.indexOf("==UserScript=="),
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js.indexOf("==/UserScript=="));
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}
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// remove new line comments
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header = header.replace("\n//", " ");
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// get a list of key-value
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final String[] attributes = header.split(" +");
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// add default values
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map.put("version", "not found");
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map.put("name", "unknown");
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map.put("description", "");
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map.put("category", "Misc");
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// add parsed values
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for (int i = 0; i < attributes.length; i++) {
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// search for attributes and use the value
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if (attributes[i].equals("@version")) {
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map.put("version", attributes[i + 1]);
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}
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if (attributes[i].equals("@name")) {
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map.put("name", attributes[i + 1]);
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}
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if (attributes[i].equals("@description")) {
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map.put("description", attributes[i + 1]);
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}
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if (attributes[i].equals("@category")) {
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map.put("category", attributes[i + 1]);
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}
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}
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return map;
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}
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private final AssetManager mAssetManager;
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private final IITC_Mobile mIitc;
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private final String mIitcPath;
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private final SharedPreferences mPrefs;
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public IITC_FileManager(final IITC_Mobile iitc) {
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mIitc = iitc;
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mIitcPath = Environment.getExternalStorageDirectory().getPath() + "/IITC_Mobile/";
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mPrefs = PreferenceManager.getDefaultSharedPreferences(iitc);
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mAssetManager = mIitc.getAssets();
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}
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private InputStream getAssetFile(final String filename) throws IOException {
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if (mPrefs.getBoolean("pref_dev_checkbox", false)) {
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final File file = new File(mIitcPath + "dev/" + filename);
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try {
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return new FileInputStream(file);
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} catch (final FileNotFoundException e) {
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mIitc.runOnUiThread(new Runnable() {
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@Override
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public void run() {
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Toast.makeText(mIitc, "File " + mIitcPath +
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"dev/" + filename + " not found. " +
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"Disable developer mode or add iitc files to the dev folder.",
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Toast.LENGTH_SHORT).show();
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}
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});
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Log.w(e);
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}
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}
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final String source = mPrefs.getString("pref_iitc_source", "local");
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if (!source.equals("local")) {
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// load iitc script from web or asset folder
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if (source.contains("http")) {
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try {
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final URL context = new URL(source);
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final URL url = new URL(context, filename);
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return url.openStream();
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} catch (final IOException e) {
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Log.w(e);
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}
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} else {
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final File file = new File(source + File.separatorChar + filename);
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try {
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return new FileInputStream(file);
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} catch (final FileNotFoundException e) {
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Log.w(e);
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}
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}
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}
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// load plugins from asset folder
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return mAssetManager.open(filename);
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}
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private WebResourceResponse getFileRequest(final Uri uri) {
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return new FileRequest(uri);
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}
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private WebResourceResponse getScript(final Uri uri) {
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InputStream stream;
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try {
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stream = getAssetFile(uri.getPath().substring(1));
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} catch (final IOException e) {
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Log.w(e);
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return EMPTY;
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}
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final InputStream data = prepareUserScript(stream);
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return new WebResourceResponse("application/x-javascript", "UTF-8", data);
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}
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private HashMap<String, String> getScriptInfo(final InputStream stream) {
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return getScriptInfo(readStream(stream));
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}
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private WebResourceResponse getUserPlugin(final Uri uri) {
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if (!mPrefs.getBoolean(uri.getPath(), false)) {
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Log.e("Attempted to inject user script that is not enabled by user: " + uri.getPath());
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return EMPTY;
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}
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InputStream stream;
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try {
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stream = new FileInputStream(new File(uri.getPath()));
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} catch (final IOException e) {
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Log.w(e);
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return EMPTY;
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}
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final InputStream data = prepareUserScript(stream);
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return new WebResourceResponse("application/x-javascript", "UTF-8", data);
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}
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private InputStream prepareUserScript(final InputStream stream) {
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String content = readStream(stream);
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final HashMap<String, String> info = getScriptInfo(content);
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final JSONObject jObject = new JSONObject(info);
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final String gmInfo = "var GM_info={\"script\":" + jObject.toString() + "}";
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content = content.replace(WRAPPER_OLD, WRAPPER_NEW);
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return new ByteArrayInputStream((gmInfo + content).getBytes());
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}
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public String getFileRequestPrefix() {
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return "//file-request" + DOMAIN + "/";
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}
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public String getIITCVersion() throws IOException {
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final InputStream stream = getAssetFile("total-conversion-build.user.js");
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return getScriptInfo(stream).get("version");
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}
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public WebResourceResponse getResponse(final Uri uri) {
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String host = uri.getHost();
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if (!host.endsWith(DOMAIN))
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return EMPTY;
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host = host.substring(0, host.length() - DOMAIN.length());
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if ("script".equals(host))
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return getScript(uri);
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if ("user-plugin".equals(host))
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return getUserPlugin(uri);
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if ("file-request".equals(host))
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return getFileRequest(uri);
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Log.e("could not generate response for url: " + uri);
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return EMPTY;
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}
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private class FileRequest extends WebResourceResponse implements ResponseHandler, Runnable {
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private Intent mData;
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private final String mFunctionName;
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private int mResultCode;
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private PipedOutputStream mStreamOut;
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private FileRequest(final Uri uri) {
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// create two connected streams we can write to after the file has been read
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super("application/x-javascript", "UTF-8", new PipedInputStream());
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try {
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mStreamOut = new PipedOutputStream((PipedInputStream) getData());
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} catch (final IOException e) {
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Log.w(e);
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}
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// the function to call
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mFunctionName = uri.getPathSegments().get(0);
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// create the chooser Intent
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final Intent target = new Intent(Intent.ACTION_GET_CONTENT);
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target.setType("file/*");
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target.addCategory(Intent.CATEGORY_OPENABLE);
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try {
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mIitc.startActivityForResult(Intent.createChooser(target, "Choose file"), this);
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} catch (final ActivityNotFoundException e) {
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Toast.makeText(mIitc, "No activity to select a file found." +
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"Please install a file browser of your choice!", Toast.LENGTH_LONG).show();
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}
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}
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@Override
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public void onActivityResult(final int resultCode, final Intent data) {
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mIitc.deleteResponseHandler(this); // to enable garbage collection
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mResultCode = resultCode;
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mData = data;
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// read file in new thread using Runnable interface, see run()
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new Thread(this, "FileRequestReader").start();
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}
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@Override
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public void run() {
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try {
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if (mResultCode == Activity.RESULT_OK && mData != null) {
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final Uri uri = mData.getData();
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final File file = new File(uri.getPath());
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// now create a resource that basically looks like:
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// someFunctionName('<url encoded filename>', '<base64 encoded content>');
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mStreamOut.write(
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(mFunctionName + "('" + URLEncoder.encode(file.getName(), "UTF-8") + "', '").getBytes());
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final Base64OutputStream encoder =
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new Base64OutputStream(mStreamOut, Base64.NO_CLOSE | Base64.NO_WRAP | Base64.DEFAULT);
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final FileInputStream fileinput = new FileInputStream(file);
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copyStream(fileinput, encoder, true);
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mStreamOut.write("');".getBytes());
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}
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} catch (final IOException e) {
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Log.w(e);
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} finally {
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// try to close stream, but ignore errors
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try {
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mStreamOut.close();
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} catch (final IOException e1) {
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}
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}
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}
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}
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}
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