add flutter

OnTime_Driver_live/lib/PRDownloader/prdownloader/.gitignore

@@ -0,0 +1 @@
+/build

OnTime_Driver_live/lib/PRDownloader/prdownloader/build.gradle

@@ -0,0 +1,28 @@
+apply plugin: 'com.android.library'
+
+android {
+    namespace 'com.downloader'
+    compileSdk 33
+
+    defaultConfig {
+        minSdkVersion 21
+        targetSdkVersion 33
+        versionCode 1
+        versionName "1.0.1"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    testImplementation 'junit:junit:4.13.2'
+    androidTestImplementation 'androidx.test:runner:1.5.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/androidTest/java/com/downloader/ExampleInstrumentedTest.java

@@ -0,0 +1,26 @@
+package com.downloader;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() throws Exception {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("com.downloader.test", appContext.getPackageName());
+    }
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/Constants.java

@@ -0,0 +1,26 @@
+package com.downloader;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public final class Constants {
+
+    private Constants() {
+        // no instance
+    }
+
+    public static final int UPDATE = 0x01;
+    public static final String RANGE = "Range";
+    public static final String ETAG = "ETag";
+    public static final String USER_AGENT = "User-Agent";
+    public static final String DEFAULT_USER_AGENT = "PRDownloader";
+
+    public static final int DEFAULT_READ_TIMEOUT_IN_MILLS = 20_000;
+    public static final int DEFAULT_CONNECT_TIMEOUT_IN_MILLS = 20_000;
+
+    public static final int HTTP_RANGE_NOT_SATISFIABLE = 416;
+    public static final int HTTP_TEMPORARY_REDIRECT = 307;
+    public static final int HTTP_PERMANENT_REDIRECT = 308;
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/Error.java

@@ -0,0 +1,66 @@
+package com.downloader;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class Error {
+
+    private boolean isServerError;
+    private boolean isConnectionError;
+    private String serverErrorMessage;
+    private Map<String, List<String>> headerFields;
+    private Throwable connectionException;
+    private int responseCode;
+
+    public boolean isServerError() {
+        return isServerError;
+    }
+
+    public void setServerError(boolean serverError) {
+        isServerError = serverError;
+    }
+
+    public boolean isConnectionError() {
+        return isConnectionError;
+    }
+
+    public void setConnectionError(boolean connectionError) {
+        isConnectionError = connectionError;
+    }
+
+    public void setServerErrorMessage(String serverErrorMessage) {
+        this.serverErrorMessage = serverErrorMessage;
+    }
+
+    public String getServerErrorMessage() {
+        return serverErrorMessage;
+    }
+
+    public void setHeaderFields(Map<String, List<String>> headerFields) {
+        this.headerFields = headerFields;
+    }
+
+    public Map<String, List<String>> getHeaderFields() {
+        return headerFields;
+    }
+
+    public void setConnectionException(Throwable connectionException) {
+        this.connectionException = connectionException;
+    }
+
+    public Throwable getConnectionException() {
+        return connectionException;
+    }
+
+    public void setResponseCode(int responseCode) {
+        this.responseCode = responseCode;
+    }
+
+    public int getResponseCode() {
+        return responseCode;
+    }
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/OnCancelListener.java

@@ -0,0 +1,11 @@
+package com.downloader;
+
+/**
+ * Created by amitshekhar on 15/11/17.
+ */
+
+public interface OnCancelListener {
+
+    void onCancel();
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/OnDownloadListener.java

@@ -0,0 +1,13 @@
+package com.downloader;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public interface OnDownloadListener {
+
+    void onDownloadComplete();
+
+    void onError(Error error);
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/OnPauseListener.java

@@ -0,0 +1,11 @@
+package com.downloader;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public interface OnPauseListener {
+
+    void onPause();
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/OnProgressListener.java

@@ -0,0 +1,11 @@
+package com.downloader;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public interface OnProgressListener {
+
+    void onProgress(Progress progress);
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/OnStartOrResumeListener.java

@@ -0,0 +1,11 @@
+package com.downloader;
+
+/**
+ * Created by amitshekhar on 15/11/17.
+ */
+
+public interface OnStartOrResumeListener {
+
+    void onStartOrResume();
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/PRDownloader.java

@@ -0,0 +1,129 @@
+package com.downloader;
+
+/**
+ * Created by amitshekhar on 12/11/17.
+ */
+
+import android.content.Context;
+
+import com.downloader.core.Core;
+import com.downloader.internal.ComponentHolder;
+import com.downloader.internal.DownloadRequestQueue;
+import com.downloader.request.DownloadRequestBuilder;
+import com.downloader.utils.Utils;
+
+/**
+ * PRDownloader entry point.
+ * You must initialize this class before use. The simplest way is to just do
+ * {#code PRDownloader.initialize(context)}.
+ */
+public class PRDownloader {
+
+    /**
+     * private constructor to prevent instantiation of this class
+     */
+    private PRDownloader() {
+    }
+
+    /**
+     * Initializes PRDownloader with the default config.
+     *
+     * @param context The context
+     */
+    public static void initialize(Context context) {
+        initialize(context, PRDownloaderConfig.newBuilder().build());
+    }
+
+    /**
+     * Initializes PRDownloader with the custom config.
+     *
+     * @param context The context
+     * @param config  The PRDownloaderConfig
+     */
+    public static void initialize(Context context, PRDownloaderConfig config) {
+        ComponentHolder.getInstance().init(context, config);
+        DownloadRequestQueue.initialize();
+    }
+
+    /**
+     * Method to make download request
+     *
+     * @param url      The url on which request is to be made
+     * @param dirPath  The directory path on which file is to be saved
+     * @param fileName The file name with which file is to be saved
+     * @return the DownloadRequestBuilder
+     */
+    public static DownloadRequestBuilder download(String url, String dirPath, String fileName) {
+        return new DownloadRequestBuilder(url, dirPath, fileName);
+    }
+
+    /**
+     * Method to pause request with the given downloadId
+     *
+     * @param downloadId The downloadId with which request is to be paused
+     */
+    public static void pause(int downloadId) {
+        DownloadRequestQueue.getInstance().pause(downloadId);
+    }
+
+    /**
+     * Method to resume request with the given downloadId
+     *
+     * @param downloadId The downloadId with which request is to be resumed
+     */
+    public static void resume(int downloadId) {
+        DownloadRequestQueue.getInstance().resume(downloadId);
+    }
+
+    /**
+     * Method to cancel request with the given downloadId
+     *
+     * @param downloadId The downloadId with which request is to be cancelled
+     */
+    public static void cancel(int downloadId) {
+        DownloadRequestQueue.getInstance().cancel(downloadId);
+    }
+
+    /**
+     * Method to cancel requests with the given tag
+     *
+     * @param tag The tag with which requests are to be cancelled
+     */
+    public static void cancel(Object tag) {
+        DownloadRequestQueue.getInstance().cancel(tag);
+    }
+
+    /**
+     * Method to cancel all requests
+     */
+    public static void cancelAll() {
+        DownloadRequestQueue.getInstance().cancelAll();
+    }
+
+    /**
+     * Method to check the request with the given downloadId is running or not
+     *
+     * @param downloadId The downloadId with which request status is to be checked
+     * @return the running status
+     */
+    public static Status getStatus(int downloadId) {
+        return DownloadRequestQueue.getInstance().getStatus(downloadId);
+    }
+
+    /**
+     * Method to clean up temporary resumed files which is older than the given day
+     *
+     * @param days the days
+     */
+    public static void cleanUp(int days) {
+        Utils.deleteUnwantedModelsAndTempFiles(days);
+    }
+
+    /**
+     * Shuts PRDownloader down
+     */
+    public static void shutDown() {
+        Core.shutDown();
+    }
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/PRDownloaderConfig.java

@@ -0,0 +1,107 @@
+package com.downloader;
+
+import com.downloader.httpclient.DefaultHttpClient;
+import com.downloader.httpclient.HttpClient;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class PRDownloaderConfig {
+
+    private int readTimeout;
+    private int connectTimeout;
+    private String userAgent;
+    private HttpClient httpClient;
+    private boolean databaseEnabled;
+
+    private PRDownloaderConfig(Builder builder) {
+        this.readTimeout = builder.readTimeout;
+        this.connectTimeout = builder.connectTimeout;
+        this.userAgent = builder.userAgent;
+        this.httpClient = builder.httpClient;
+        this.databaseEnabled = builder.databaseEnabled;
+    }
+
+    public int getReadTimeout() {
+        return readTimeout;
+    }
+
+    public void setReadTimeout(int readTimeout) {
+        this.readTimeout = readTimeout;
+    }
+
+    public int getConnectTimeout() {
+        return connectTimeout;
+    }
+
+    public void setConnectTimeout(int connectTimeout) {
+        this.connectTimeout = connectTimeout;
+    }
+
+    public String getUserAgent() {
+        return userAgent;
+    }
+
+    public void setUserAgent(String userAgent) {
+        this.userAgent = userAgent;
+    }
+
+    public HttpClient getHttpClient() {
+        return httpClient;
+    }
+
+    public void setHttpClient(HttpClient httpClient) {
+        this.httpClient = httpClient;
+    }
+
+    public boolean isDatabaseEnabled() {
+        return databaseEnabled;
+    }
+
+    public void setDatabaseEnabled(boolean databaseEnabled) {
+        this.databaseEnabled = databaseEnabled;
+    }
+
+    public static Builder newBuilder() {
+        return new Builder();
+    }
+
+    public static class Builder {
+
+        int readTimeout = Constants.DEFAULT_READ_TIMEOUT_IN_MILLS;
+        int connectTimeout = Constants.DEFAULT_CONNECT_TIMEOUT_IN_MILLS;
+        String userAgent = Constants.DEFAULT_USER_AGENT;
+        HttpClient httpClient = new DefaultHttpClient();
+        boolean databaseEnabled = false;
+
+        public Builder setReadTimeout(int readTimeout) {
+            this.readTimeout = readTimeout;
+            return this;
+        }
+
+        public Builder setConnectTimeout(int connectTimeout) {
+            this.connectTimeout = connectTimeout;
+            return this;
+        }
+
+        public Builder setUserAgent(String userAgent) {
+            this.userAgent = userAgent;
+            return this;
+        }
+
+        public Builder setHttpClient(HttpClient httpClient) {
+            this.httpClient = httpClient;
+            return this;
+        }
+
+        public Builder setDatabaseEnabled(boolean databaseEnabled) {
+            this.databaseEnabled = databaseEnabled;
+            return this;
+        }
+
+        public PRDownloaderConfig build() {
+            return new PRDownloaderConfig(this);
+        }
+    }
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/Priority.java

@@ -0,0 +1,32 @@
+package com.downloader;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+/**
+ * Priority levels recognized by the request server.
+ */
+public enum Priority {
+
+    /**
+     * Lowest priority level. Used for prefetches of data.
+     */
+    LOW,
+
+    /**
+     * Medium priority level. Used for warming of data that might soon get visible.
+     */
+    MEDIUM,
+
+    /**
+     * Highest priority level. Used for data that are currently visible on screen.
+     */
+    HIGH,
+
+    /**
+     * Highest priority level. Used for data that are required instantly(mainly for emergency).
+     */
+    IMMEDIATE
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/Progress.java

@@ -0,0 +1,26 @@
+package com.downloader;
+
+import java.io.Serializable;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class Progress implements Serializable {
+
+    public long currentBytes;
+    public long totalBytes;
+
+    public Progress(long currentBytes, long totalBytes) {
+        this.currentBytes = currentBytes;
+        this.totalBytes = totalBytes;
+    }
+
+    @Override
+    public String toString() {
+        return "Progress{" +
+                "currentBytes=" + currentBytes +
+                ", totalBytes=" + totalBytes +
+                '}';
+    }
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/Response.java

@@ -0,0 +1,46 @@
+package com.downloader;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class Response {
+
+    private Error error;
+    private boolean isSuccessful;
+    private boolean isPaused;
+    private boolean isCancelled;
+
+    public Error getError() {
+        return error;
+    }
+
+    public void setError(Error error) {
+        this.error = error;
+    }
+
+    public boolean isSuccessful() {
+        return isSuccessful;
+    }
+
+    public void setSuccessful(boolean successful) {
+        isSuccessful = successful;
+    }
+
+    public boolean isPaused() {
+        return isPaused;
+    }
+
+    public void setPaused(boolean paused) {
+        isPaused = paused;
+    }
+
+    public boolean isCancelled() {
+        return isCancelled;
+    }
+
+    public void setCancelled(boolean cancelled) {
+        isCancelled = cancelled;
+    }
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/Status.java

@@ -0,0 +1,23 @@
+package com.downloader;
+
+/**
+ * Created by amitshekhar on 15/11/17.
+ */
+
+public enum Status {
+
+    QUEUED,
+
+    RUNNING,
+
+    PAUSED,
+
+    COMPLETED,
+
+    CANCELLED,
+
+    FAILED,
+
+    UNKNOWN
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/core/Core.java

@@ -0,0 +1,36 @@
+package com.downloader.core;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class Core {
+
+    private static Core instance = null;
+    private final ExecutorSupplier executorSupplier;
+
+    private Core() {
+        this.executorSupplier = new DefaultExecutorSupplier();
+    }
+
+    public static Core getInstance() {
+        if (instance == null) {
+            synchronized (Core.class) {
+                if (instance == null) {
+                    instance = new Core();
+                }
+            }
+        }
+        return instance;
+    }
+
+    public ExecutorSupplier getExecutorSupplier() {
+        return executorSupplier;
+    }
+
+    public static void shutDown() {
+        if (instance != null) {
+            instance = null;
+        }
+    }
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/core/DefaultExecutorSupplier.java

@@ -0,0 +1,41 @@
+package com.downloader.core;
+
+import android.os.Process;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ThreadFactory;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class DefaultExecutorSupplier implements ExecutorSupplier {
+
+    private static final int DEFAULT_MAX_NUM_THREADS = 2 * Runtime.getRuntime().availableProcessors() + 1;
+    private final DownloadExecutor networkExecutor;
+    private final Executor backgroundExecutor;
+    private final Executor mainThreadExecutor;
+
+    DefaultExecutorSupplier() {
+        ThreadFactory backgroundPriorityThreadFactory = new PriorityThreadFactory(Process.THREAD_PRIORITY_BACKGROUND);
+        networkExecutor = new DownloadExecutor(DEFAULT_MAX_NUM_THREADS, backgroundPriorityThreadFactory);
+        backgroundExecutor = Executors.newSingleThreadExecutor();
+        mainThreadExecutor = new MainThreadExecutor();
+    }
+
+    @Override
+    public DownloadExecutor forDownloadTasks() {
+        return networkExecutor;
+    }
+
+    @Override
+    public Executor forBackgroundTasks() {
+        return backgroundExecutor;
+    }
+
+    @Override
+    public Executor forMainThreadTasks() {
+        return mainThreadExecutor;
+    }
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/core/DownloadExecutor.java

@@ -0,0 +1,27 @@
+package com.downloader.core;
+
+import com.downloader.internal.DownloadRunnable;
+
+import java.util.concurrent.Future;
+import java.util.concurrent.PriorityBlockingQueue;
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class DownloadExecutor extends ThreadPoolExecutor {
+
+    DownloadExecutor(int maxNumThreads, ThreadFactory threadFactory) {
+        super(maxNumThreads, maxNumThreads, 0, TimeUnit.MILLISECONDS, new PriorityBlockingQueue<Runnable>(), threadFactory);
+    }
+
+    @Override
+    public Future<?> submit(Runnable task) {
+        DownloadFutureTask futureTask = new DownloadFutureTask((DownloadRunnable) task);
+        execute(futureTask);
+        return futureTask;
+    }
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/core/DownloadFutureTask.java

@@ -0,0 +1,27 @@
+package com.downloader.core;
+
+import com.downloader.Priority;
+import com.downloader.internal.DownloadRunnable;
+
+import java.util.concurrent.FutureTask;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class DownloadFutureTask extends FutureTask<DownloadRunnable> implements Comparable<DownloadFutureTask> {
+
+    private final DownloadRunnable runnable;
+
+    DownloadFutureTask(DownloadRunnable downloadRunnable) {
+        super(downloadRunnable, null);
+        this.runnable = downloadRunnable;
+    }
+
+    @Override
+    public int compareTo(DownloadFutureTask other) {
+        Priority p1 = runnable.priority;
+        Priority p2 = other.runnable.priority;
+        return (p1 == p2 ? runnable.sequence - other.runnable.sequence : p2.ordinal() - p1.ordinal());
+    }
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/core/ExecutorSupplier.java

@@ -0,0 +1,17 @@
+package com.downloader.core;
+
+import java.util.concurrent.Executor;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public interface ExecutorSupplier {
+
+    DownloadExecutor forDownloadTasks();
+
+    Executor forBackgroundTasks();
+
+    Executor forMainThreadTasks();
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/core/MainThreadExecutor.java

@@ -0,0 +1,20 @@
+package com.downloader.core;
+
+import android.os.Handler;
+import android.os.Looper;
+
+import java.util.concurrent.Executor;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class MainThreadExecutor implements Executor {
+
+    private final Handler handler = new Handler(Looper.getMainLooper());
+
+    @Override
+    public void execute(Runnable runnable) {
+        handler.post(runnable);
+    }
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/core/PriorityThreadFactory.java

@@ -0,0 +1,34 @@
+package com.downloader.core;
+
+import android.os.Process;
+
+import java.util.concurrent.ThreadFactory;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class PriorityThreadFactory implements ThreadFactory {
+
+    private final int mThreadPriority;
+
+    PriorityThreadFactory(int threadPriority) {
+        mThreadPriority = threadPriority;
+    }
+
+    @Override
+    public Thread newThread(final Runnable runnable) {
+        Runnable wrapperRunnable = new Runnable() {
+            @Override
+            public void run() {
+                try {
+                    Process.setThreadPriority(mThreadPriority);
+                } catch (Throwable ignored) {
+
+                }
+                runnable.run();
+            }
+        };
+        return new Thread(wrapperRunnable);
+    }
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/database/AppDbHelper.java

@@ -0,0 +1,154 @@
+package com.downloader.database;
+
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by anandgaurav on 14-11-2017.
+ */
+
+public class AppDbHelper implements DbHelper {
+
+    public static final String TABLE_NAME = "prdownloader";
+    private final SQLiteDatabase db;
+
+    public AppDbHelper(Context context) {
+        DatabaseOpenHelper databaseOpenHelper = new DatabaseOpenHelper(context);
+        db = databaseOpenHelper.getWritableDatabase();
+    }
+
+    @Override
+    public DownloadModel find(int id) {
+        Cursor cursor = null;
+        DownloadModel model = null;
+        try {
+            cursor = db.rawQuery("SELECT * FROM " + TABLE_NAME + " WHERE " +
+                    DownloadModel.ID + " = " + id, null);
+            if (cursor != null && cursor.moveToFirst()) {
+                model = new DownloadModel();
+                model.setId(id);
+                model.setUrl(cursor.getString(cursor.getColumnIndex(DownloadModel.URL)));
+                model.setETag(cursor.getString(cursor.getColumnIndex(DownloadModel.ETAG)));
+                model.setDirPath(cursor.getString(cursor.getColumnIndex(DownloadModel.DIR_PATH)));
+                model.setFileName(cursor.getString(cursor.getColumnIndex(DownloadModel.FILE_NAME)));
+                model.setTotalBytes(cursor.getLong(cursor.getColumnIndex(DownloadModel.TOTAL_BYTES)));
+                model.setDownloadedBytes(cursor.getLong(cursor.getColumnIndex(DownloadModel.DOWNLOADED_BYTES)));
+                model.setLastModifiedAt(cursor.getLong(cursor.getColumnIndex(DownloadModel.LAST_MODIFIED_AT)));
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        } finally {
+            if (cursor != null) {
+                cursor.close();
+            }
+        }
+        return model;
+    }
+
+    @Override
+    public void insert(DownloadModel model) {
+        try {
+            ContentValues values = new ContentValues();
+            values.put(DownloadModel.ID, model.getId());
+            values.put(DownloadModel.URL, model.getUrl());
+            values.put(DownloadModel.ETAG, model.getETag());
+            values.put(DownloadModel.DIR_PATH, model.getDirPath());
+            values.put(DownloadModel.FILE_NAME, model.getFileName());
+            values.put(DownloadModel.TOTAL_BYTES, model.getTotalBytes());
+            values.put(DownloadModel.DOWNLOADED_BYTES, model.getDownloadedBytes());
+            values.put(DownloadModel.LAST_MODIFIED_AT, model.getLastModifiedAt());
+            db.insert(TABLE_NAME, null, values);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void update(DownloadModel model) {
+        try {
+            ContentValues values = new ContentValues();
+            values.put(DownloadModel.URL, model.getUrl());
+            values.put(DownloadModel.ETAG, model.getETag());
+            values.put(DownloadModel.DIR_PATH, model.getDirPath());
+            values.put(DownloadModel.FILE_NAME, model.getFileName());
+            values.put(DownloadModel.TOTAL_BYTES, model.getTotalBytes());
+            values.put(DownloadModel.DOWNLOADED_BYTES, model.getDownloadedBytes());
+            values.put(DownloadModel.LAST_MODIFIED_AT, model.getLastModifiedAt());
+            db.update(TABLE_NAME, values, DownloadModel.ID + " = ? ",
+                    new String[]{String.valueOf(model.getId())});
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void updateProgress(int id, long downloadedBytes, long lastModifiedAt) {
+        try {
+            ContentValues values = new ContentValues();
+            values.put(DownloadModel.DOWNLOADED_BYTES, downloadedBytes);
+            values.put(DownloadModel.LAST_MODIFIED_AT, lastModifiedAt);
+            db.update(TABLE_NAME, values, DownloadModel.ID + " = ? ",
+                    new String[]{String.valueOf(id)});
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void remove(int id) {
+        try {
+            db.execSQL("DELETE FROM " + TABLE_NAME + " WHERE " +
+                    DownloadModel.ID + " = " + id);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public List<DownloadModel> getUnwantedModels(int days) {
+        List<DownloadModel> models = new ArrayList<>();
+        Cursor cursor = null;
+        try {
+            final long daysInMillis = days * 24 * 60 * 60 * 1000L;
+            final long beforeTimeInMillis = System.currentTimeMillis() - daysInMillis;
+            cursor = db.rawQuery("SELECT * FROM " + TABLE_NAME + " WHERE " +
+                    DownloadModel.LAST_MODIFIED_AT + " <= " + beforeTimeInMillis, null);
+            if (cursor != null && cursor.moveToFirst()) {
+                do {
+                    DownloadModel model = new DownloadModel();
+                    model.setId(cursor.getInt(cursor.getColumnIndex(DownloadModel.ID)));
+                    model.setUrl(cursor.getString(cursor.getColumnIndex(DownloadModel.URL)));
+                    model.setETag(cursor.getString(cursor.getColumnIndex(DownloadModel.ETAG)));
+                    model.setDirPath(cursor.getString(cursor.getColumnIndex(DownloadModel.DIR_PATH)));
+                    model.setFileName(cursor.getString(cursor.getColumnIndex(DownloadModel.FILE_NAME)));
+                    model.setTotalBytes(cursor.getLong(cursor.getColumnIndex(DownloadModel.TOTAL_BYTES)));
+                    model.setDownloadedBytes(cursor.getLong(cursor.getColumnIndex(DownloadModel.DOWNLOADED_BYTES)));
+                    model.setLastModifiedAt(cursor.getLong(cursor.getColumnIndex(DownloadModel.LAST_MODIFIED_AT)));
+
+                    models.add(model);
+                } while (cursor.moveToNext());
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        } finally {
+            if (cursor != null) {
+                cursor.close();
+            }
+        }
+        return models;
+    }
+
+    @Override
+    public void clear() {
+        try {
+            db.delete(TABLE_NAME, null, null);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/database/DatabaseOpenHelper.java

@@ -0,0 +1,40 @@
+package com.downloader.database;
+
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+
+/**
+ * Created by anandgaurav on 14-11-2017.
+ */
+
+public class DatabaseOpenHelper extends SQLiteOpenHelper {
+
+    private static final String DATABASE_NAME = "prdownloader.db";
+    private static final int DATABASE_VERSION = 1;
+
+    DatabaseOpenHelper(Context context) {
+        super(context, DATABASE_NAME, null, DATABASE_VERSION);
+    }
+
+    @Override
+    public void onCreate(SQLiteDatabase db) {
+        db.execSQL("CREATE TABLE IF NOT EXISTS " +
+                AppDbHelper.TABLE_NAME + "( " +
+                DownloadModel.ID + " INTEGER PRIMARY KEY, " +
+                DownloadModel.URL + " VARCHAR, " +
+                DownloadModel.ETAG + " VARCHAR, " +
+                DownloadModel.DIR_PATH + " VARCHAR, " +
+                DownloadModel.FILE_NAME + " VARCHAR, " +
+                DownloadModel.TOTAL_BYTES + " INTEGER, " +
+                DownloadModel.DOWNLOADED_BYTES + " INTEGER, " +
+                DownloadModel.LAST_MODIFIED_AT + " INTEGER " +
+                ")");
+    }
+
+    @Override
+    public void onUpgrade(SQLiteDatabase db, int i, int i1) {
+
+    }
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/database/DbHelper.java

@@ -0,0 +1,25 @@
+package com.downloader.database;
+
+import java.util.List;
+
+/**
+ * Created by anandgaurav on 14-11-2017.
+ */
+
+public interface DbHelper {
+
+    DownloadModel find(int id);
+
+    void insert(DownloadModel model);
+
+    void update(DownloadModel model);
+
+    void updateProgress(int id, long downloadedBytes, long lastModifiedAt);
+
+    void remove(int id);
+
+    List<DownloadModel> getUnwantedModels(int days);
+
+    void clear();
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/database/DownloadModel.java

@@ -0,0 +1,91 @@
+package com.downloader.database;
+
+/**
+ * Created by anandgaurav on 14-11-2017.
+ */
+
+public class DownloadModel {
+
+    static final String ID = "id";
+    static final String URL = "url";
+    static final String ETAG = "etag";
+    static final String DIR_PATH = "dir_path";
+    static final String FILE_NAME = "file_name";
+    static final String TOTAL_BYTES = "total_bytes";
+    static final String DOWNLOADED_BYTES = "downloaded_bytes";
+    static final String LAST_MODIFIED_AT = "last_modified_at";
+
+    private int id;
+    private String url;
+    private String eTag;
+    private String dirPath;
+    private String fileName;
+    private long totalBytes;
+    private long downloadedBytes;
+    private long lastModifiedAt;
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    public String getETag() {
+        return eTag;
+    }
+
+    public void setETag(String eTag) {
+        this.eTag = eTag;
+    }
+
+    public String getDirPath() {
+        return dirPath;
+    }
+
+    public void setDirPath(String dirPath) {
+        this.dirPath = dirPath;
+    }
+
+    public String getFileName() {
+        return fileName;
+    }
+
+    public void setFileName(String fileName) {
+        this.fileName = fileName;
+    }
+
+    public long getTotalBytes() {
+        return totalBytes;
+    }
+
+    public void setTotalBytes(long totalBytes) {
+        this.totalBytes = totalBytes;
+    }
+
+    public long getDownloadedBytes() {
+        return downloadedBytes;
+    }
+
+    public void setDownloadedBytes(long downloadedBytes) {
+        this.downloadedBytes = downloadedBytes;
+    }
+
+    public long getLastModifiedAt() {
+        return lastModifiedAt;
+    }
+
+    public void setLastModifiedAt(long lastModifiedAt) {
+        this.lastModifiedAt = lastModifiedAt;
+    }
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/database/NoOpsDbHelper.java

@@ -0,0 +1,49 @@
+package com.downloader.database;
+
+import java.util.List;
+
+/**
+ * Created by anandgaurav on 14-11-2017.
+ */
+
+public class NoOpsDbHelper implements DbHelper {
+
+    public NoOpsDbHelper() {
+
+    }
+
+    @Override
+    public DownloadModel find(int id) {
+        return null;
+    }
+
+    @Override
+    public void insert(DownloadModel model) {
+
+    }
+
+    @Override
+    public void update(DownloadModel model) {
+
+    }
+
+    @Override
+    public void updateProgress(int id, long downloadedBytes, long lastModifiedAt) {
+
+    }
+
+    @Override
+    public void remove(int id) {
+
+    }
+
+    @Override
+    public List<DownloadModel> getUnwantedModels(int days) {
+        return null;
+    }
+
+    @Override
+    public void clear() {
+
+    }
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/handler/ProgressHandler.java

@@ -0,0 +1,38 @@
+package com.downloader.handler;
+
+import android.os.Handler;
+import android.os.Looper;
+import android.os.Message;
+
+import com.downloader.Constants;
+import com.downloader.Progress;
+import com.downloader.OnProgressListener;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class ProgressHandler extends Handler {
+
+    private final OnProgressListener listener;
+
+    public ProgressHandler(OnProgressListener listener) {
+        super(Looper.getMainLooper());
+        this.listener = listener;
+    }
+
+    @Override
+    public void handleMessage(Message msg) {
+        switch (msg.what) {
+            case Constants.UPDATE:
+                if (listener != null) {
+                    final Progress progress = (Progress) msg.obj;
+                    listener.onProgress(progress);
+                }
+                break;
+            default:
+                super.handleMessage(msg);
+                break;
+        }
+    }
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/httpclient/DefaultHttpClient.java

@@ -0,0 +1,111 @@
+package com.downloader.httpclient;
+
+import com.downloader.Constants;
+import com.downloader.request.DownloadRequest;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.net.URLConnection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class DefaultHttpClient implements HttpClient {
+
+    private URLConnection connection;
+
+    public DefaultHttpClient() {
+
+    }
+
+    @SuppressWarnings("CloneDoesntCallSuperClone")
+    @Override
+    public HttpClient clone() {
+        return new DefaultHttpClient();
+    }
+
+    @Override
+    public void connect(DownloadRequest request) throws IOException {
+        connection = new URL(request.getUrl()).openConnection();
+        connection.setReadTimeout(request.getReadTimeout());
+        connection.setConnectTimeout(request.getConnectTimeout());
+        final String range = String.format(Locale.ENGLISH,
+                "bytes=%d-", request.getDownloadedBytes());
+        connection.addRequestProperty(Constants.RANGE, range);
+        connection.addRequestProperty(Constants.USER_AGENT, request.getUserAgent());
+        addHeaders(request);
+        connection.connect();
+    }
+
+    @Override
+    public int getResponseCode() throws IOException {
+        int responseCode = 0;
+        if (connection instanceof HttpURLConnection) {
+            responseCode = ((HttpURLConnection) connection).getResponseCode();
+        }
+        return responseCode;
+    }
+
+    @Override
+    public InputStream getInputStream() throws IOException {
+        return connection.getInputStream();
+    }
+
+    @Override
+    public long getContentLength() {
+        String length = connection.getHeaderField("Content-Length");
+        try {
+            return Long.parseLong(length);
+        } catch (NumberFormatException e) {
+            return -1;
+        }
+    }
+
+    @Override
+    public String getResponseHeader(String name) {
+        return connection.getHeaderField(name);
+    }
+
+    @Override
+    public void close() {
+        // no operation
+    }
+
+    @Override
+    public Map<String, List<String>> getHeaderFields() {
+        return connection.getHeaderFields();
+    }
+
+    @Override
+    public InputStream getErrorStream() {
+        if (connection instanceof HttpURLConnection) {
+            return ((HttpURLConnection) connection).getErrorStream();
+        }
+        return null;
+    }
+
+    private void addHeaders(DownloadRequest request) {
+        final HashMap<String, List<String>> headers = request.getHeaders();
+        if (headers != null) {
+            Set<Map.Entry<String, List<String>>> entries = headers.entrySet();
+            for (Map.Entry<String, List<String>> entry : entries) {
+                String name = entry.getKey();
+                List<String> list = entry.getValue();
+                if (list != null) {
+                    for (String value : list) {
+                        connection.addRequestProperty(name, value);
+                    }
+                }
+            }
+        }
+    }
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/httpclient/HttpClient.java

@@ -0,0 +1,34 @@
+package com.downloader.httpclient;
+
+import com.downloader.request.DownloadRequest;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public interface HttpClient extends Cloneable {
+
+    HttpClient clone();
+
+    void connect(DownloadRequest request) throws IOException;
+
+    int getResponseCode() throws IOException;
+
+    InputStream getInputStream() throws IOException;
+
+    long getContentLength();
+
+    String getResponseHeader(String name);
+
+    void close();
+
+    Map<String, List<String>> getHeaderFields();
+
+    InputStream getErrorStream() throws IOException;
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/internal/ComponentHolder.java

@@ -0,0 +1,97 @@
+package com.downloader.internal;
+
+import android.content.Context;
+
+import com.downloader.Constants;
+import com.downloader.PRDownloader;
+import com.downloader.PRDownloaderConfig;
+import com.downloader.database.AppDbHelper;
+import com.downloader.database.DbHelper;
+import com.downloader.database.NoOpsDbHelper;
+import com.downloader.httpclient.DefaultHttpClient;
+import com.downloader.httpclient.HttpClient;
+
+/**
+ * Created by amitshekhar on 14/11/17.
+ */
+
+public class ComponentHolder {
+
+    private final static ComponentHolder INSTANCE = new ComponentHolder();
+    private int readTimeout;
+    private int connectTimeout;
+    private String userAgent;
+    private HttpClient httpClient;
+    private DbHelper dbHelper;
+
+    public static ComponentHolder getInstance() {
+        return INSTANCE;
+    }
+
+    public void init(Context context, PRDownloaderConfig config) {
+        this.readTimeout = config.getReadTimeout();
+        this.connectTimeout = config.getConnectTimeout();
+        this.userAgent = config.getUserAgent();
+        this.httpClient = config.getHttpClient();
+        this.dbHelper = config.isDatabaseEnabled() ? new AppDbHelper(context) : new NoOpsDbHelper();
+        if (config.isDatabaseEnabled()) {
+            PRDownloader.cleanUp(30);
+        }
+    }
+
+    public int getReadTimeout() {
+        if (readTimeout == 0) {
+            synchronized (ComponentHolder.class) {
+                if (readTimeout == 0) {
+                    readTimeout = Constants.DEFAULT_READ_TIMEOUT_IN_MILLS;
+                }
+            }
+        }
+        return readTimeout;
+    }
+
+    public int getConnectTimeout() {
+        if (connectTimeout == 0) {
+            synchronized (ComponentHolder.class) {
+                if (connectTimeout == 0) {
+                    connectTimeout = Constants.DEFAULT_CONNECT_TIMEOUT_IN_MILLS;
+                }
+            }
+        }
+        return connectTimeout;
+    }
+
+    public String getUserAgent() {
+        if (userAgent == null) {
+            synchronized (ComponentHolder.class) {
+                if (userAgent == null) {
+                    userAgent = Constants.DEFAULT_USER_AGENT;
+                }
+            }
+        }
+        return userAgent;
+    }
+
+    public DbHelper getDbHelper() {
+        if (dbHelper == null) {
+            synchronized (ComponentHolder.class) {
+                if (dbHelper == null) {
+                    dbHelper = new NoOpsDbHelper();
+                }
+            }
+        }
+        return dbHelper;
+    }
+
+    public HttpClient getHttpClient() {
+        if (httpClient == null) {
+            synchronized (ComponentHolder.class) {
+                if (httpClient == null) {
+                    httpClient = new DefaultHttpClient();
+                }
+            }
+        }
+        return httpClient.clone();
+    }
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/internal/DownloadRequestQueue.java

@@ -0,0 +1,118 @@
+package com.downloader.internal;
+
+import com.downloader.Status;
+import com.downloader.core.Core;
+import com.downloader.request.DownloadRequest;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class DownloadRequestQueue {
+
+    private static DownloadRequestQueue instance;
+    private final Map<Integer, DownloadRequest> currentRequestMap;
+    private final AtomicInteger sequenceGenerator;
+
+    private DownloadRequestQueue() {
+        currentRequestMap = new ConcurrentHashMap<>();
+        sequenceGenerator = new AtomicInteger();
+    }
+
+    public static void initialize() {
+        getInstance();
+    }
+
+    public static DownloadRequestQueue getInstance() {
+        if (instance == null) {
+            synchronized (DownloadRequestQueue.class) {
+                if (instance == null) {
+                    instance = new DownloadRequestQueue();
+                }
+            }
+        }
+        return instance;
+    }
+
+    private int getSequenceNumber() {
+        return sequenceGenerator.incrementAndGet();
+    }
+
+    public void pause(int downloadId) {
+        DownloadRequest request = currentRequestMap.get(downloadId);
+        if (request != null) {
+            request.setStatus(Status.PAUSED);
+        }
+    }
+
+    public void resume(int downloadId) {
+        DownloadRequest request = currentRequestMap.get(downloadId);
+        if (request != null) {
+            request.setStatus(Status.QUEUED);
+            request.setFuture(Core.getInstance()
+                    .getExecutorSupplier()
+                    .forDownloadTasks()
+                    .submit(new DownloadRunnable(request)));
+        }
+    }
+
+    private void cancelAndRemoveFromMap(DownloadRequest request) {
+        if (request != null) {
+            request.cancel();
+            currentRequestMap.remove(request.getDownloadId());
+        }
+    }
+
+    public void cancel(int downloadId) {
+        DownloadRequest request = currentRequestMap.get(downloadId);
+        cancelAndRemoveFromMap(request);
+    }
+
+    public void cancel(Object tag) {
+        for (Map.Entry<Integer, DownloadRequest> currentRequestMapEntry : currentRequestMap.entrySet()) {
+            DownloadRequest request = currentRequestMapEntry.getValue();
+            if (request.getTag() instanceof String && tag instanceof String) {
+                final String tempRequestTag = (String) request.getTag();
+                final String tempTag = (String) tag;
+                if (tempRequestTag.equals(tempTag)) {
+                    cancelAndRemoveFromMap(request);
+                }
+            } else if (request.getTag().equals(tag)) {
+                cancelAndRemoveFromMap(request);
+            }
+        }
+    }
+
+    public void cancelAll() {
+        for (Map.Entry<Integer, DownloadRequest> currentRequestMapEntry : currentRequestMap.entrySet()) {
+            DownloadRequest request = currentRequestMapEntry.getValue();
+            cancelAndRemoveFromMap(request);
+        }
+    }
+
+    public Status getStatus(int downloadId) {
+        DownloadRequest request = currentRequestMap.get(downloadId);
+        if (request != null) {
+            return request.getStatus();
+        }
+        return Status.UNKNOWN;
+    }
+
+    public void addRequest(DownloadRequest request) {
+        currentRequestMap.put(request.getDownloadId(), request);
+        request.setStatus(Status.QUEUED);
+        request.setSequenceNumber(getSequenceNumber());
+        request.setFuture(Core.getInstance()
+                .getExecutorSupplier()
+                .forDownloadTasks()
+                .submit(new DownloadRunnable(request)));
+    }
+
+    public void finish(DownloadRequest request) {
+        currentRequestMap.remove(request.getDownloadId());
+    }
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/internal/DownloadRunnable.java

@@ -0,0 +1,41 @@
+package com.downloader.internal;
+
+import com.downloader.Error;
+import com.downloader.Priority;
+import com.downloader.Response;
+import com.downloader.Status;
+import com.downloader.request.DownloadRequest;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class DownloadRunnable implements Runnable {
+
+    public final Priority priority;
+    public final int sequence;
+    public final DownloadRequest request;
+
+    DownloadRunnable(DownloadRequest request) {
+        this.request = request;
+        this.priority = request.getPriority();
+        this.sequence = request.getSequenceNumber();
+    }
+
+    @Override
+    public void run() {
+        request.setStatus(Status.RUNNING);
+        DownloadTask downloadTask = DownloadTask.create(request);
+        Response response = downloadTask.run();
+        if (response.isSuccessful()) {
+            request.deliverSuccess();
+        } else if (response.isPaused()) {
+            request.deliverPauseEvent();
+        } else if (response.getError() != null) {
+            request.deliverError(response.getError());
+        } else if (!response.isCancelled()) {
+            request.deliverError(new Error());
+        }
+    }
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/internal/DownloadTask.java

@@ -0,0 +1,390 @@
+package com.downloader.internal;
+
+import com.downloader.Constants;
+import com.downloader.Error;
+import com.downloader.Progress;
+import com.downloader.Response;
+import com.downloader.Status;
+import com.downloader.database.DownloadModel;
+import com.downloader.handler.ProgressHandler;
+import com.downloader.httpclient.HttpClient;
+import com.downloader.internal.stream.FileDownloadOutputStream;
+import com.downloader.internal.stream.FileDownloadRandomAccessFile;
+import com.downloader.request.DownloadRequest;
+import com.downloader.utils.Utils;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class DownloadTask {
+
+    private static final int BUFFER_SIZE = 1024 * 4;
+    private static final long TIME_GAP_FOR_SYNC = 2000;
+    private static final long MIN_BYTES_FOR_SYNC = 65536;
+    private final DownloadRequest request;
+    private ProgressHandler progressHandler;
+    private long lastSyncTime;
+    private long lastSyncBytes;
+    private InputStream inputStream;
+    private FileDownloadOutputStream outputStream;
+    private HttpClient httpClient;
+    private long totalBytes;
+    private int responseCode;
+    private String eTag;
+    private boolean isResumeSupported;
+    private String tempPath;
+
+    private DownloadTask(DownloadRequest request) {
+        this.request = request;
+    }
+
+    static DownloadTask create(DownloadRequest request) {
+        return new DownloadTask(request);
+    }
+
+    Response run() {
+
+        Response response = new Response();
+
+        if (request.getStatus() == Status.CANCELLED) {
+            response.setCancelled(true);
+            return response;
+        } else if (request.getStatus() == Status.PAUSED) {
+            response.setPaused(true);
+            return response;
+        }
+
+        try {
+
+            if (request.getOnProgressListener() != null) {
+                progressHandler = new ProgressHandler(request.getOnProgressListener());
+            }
+
+            tempPath = Utils.getTempPath(request.getDirPath(), request.getFileName());
+
+            File file = new File(tempPath);
+
+            DownloadModel model = getDownloadModelIfAlreadyPresentInDatabase();
+
+            if (model != null) {
+                if (file.exists()) {
+                    request.setTotalBytes(model.getTotalBytes());
+                    request.setDownloadedBytes(model.getDownloadedBytes());
+                } else {
+                    removeNoMoreNeededModelFromDatabase();
+                    request.setDownloadedBytes(0);
+                    request.setTotalBytes(0);
+                    model = null;
+                }
+            }
+
+            httpClient = ComponentHolder.getInstance().getHttpClient();
+
+            httpClient.connect(request);
+
+            if (request.getStatus() == Status.CANCELLED) {
+                response.setCancelled(true);
+                return response;
+            } else if (request.getStatus() == Status.PAUSED) {
+                response.setPaused(true);
+                return response;
+            }
+
+            httpClient = Utils.getRedirectedConnectionIfAny(httpClient, request);
+
+            responseCode = httpClient.getResponseCode();
+
+            eTag = httpClient.getResponseHeader(Constants.ETAG);
+
+            if (checkIfFreshStartRequiredAndStart(model)) {
+                model = null;
+            }
+
+            if (!isSuccessful()) {
+                Error error = new Error();
+                error.setServerError(true);
+                error.setServerErrorMessage(convertStreamToString(httpClient.getErrorStream()));
+                error.setHeaderFields(httpClient.getHeaderFields());
+                error.setResponseCode(responseCode);
+                response.setError(error);
+                return response;
+            }
+
+            setResumeSupportedOrNot();
+
+            totalBytes = request.getTotalBytes();
+
+            if (!isResumeSupported) {
+                deleteTempFile();
+            }
+
+            if (totalBytes == 0) {
+                totalBytes = httpClient.getContentLength();
+                request.setTotalBytes(totalBytes);
+            }
+
+            if (isResumeSupported && model == null) {
+                createAndInsertNewModel();
+            }
+
+            if (request.getStatus() == Status.CANCELLED) {
+                response.setCancelled(true);
+                return response;
+            } else if (request.getStatus() == Status.PAUSED) {
+                response.setPaused(true);
+                return response;
+            }
+
+            request.deliverStartEvent();
+
+            inputStream = httpClient.getInputStream();
+
+            byte[] buff = new byte[BUFFER_SIZE];
+
+            if (!file.exists()) {
+                if (file.getParentFile() != null && !file.getParentFile().exists()) {
+                    if (file.getParentFile().mkdirs()) {
+                        //noinspection ResultOfMethodCallIgnored
+                        file.createNewFile();
+                    }
+                } else {
+                    //noinspection ResultOfMethodCallIgnored
+                    file.createNewFile();
+                }
+            }
+
+            this.outputStream = FileDownloadRandomAccessFile.create(file);
+
+            if (isResumeSupported && request.getDownloadedBytes() != 0) {
+                outputStream.seek(request.getDownloadedBytes());
+            }
+
+            if (request.getStatus() == Status.CANCELLED) {
+                response.setCancelled(true);
+                return response;
+            } else if (request.getStatus() == Status.PAUSED) {
+                response.setPaused(true);
+                return response;
+            }
+
+            do {
+
+                final int byteCount = inputStream.read(buff, 0, BUFFER_SIZE);
+
+                if (byteCount == -1) {
+                    break;
+                }
+
+                outputStream.write(buff, 0, byteCount);
+
+                request.setDownloadedBytes(request.getDownloadedBytes() + byteCount);
+
+                sendProgress();
+
+                syncIfRequired(outputStream);
+
+                if (request.getStatus() == Status.CANCELLED) {
+                    response.setCancelled(true);
+                    return response;
+                } else if (request.getStatus() == Status.PAUSED) {
+                    sync(outputStream);
+                    response.setPaused(true);
+                    return response;
+                }
+
+            } while (true);
+
+            final String path = Utils.getPath(request.getDirPath(), request.getFileName());
+
+            Utils.renameFileName(tempPath, path);
+
+            response.setSuccessful(true);
+
+            if (isResumeSupported) {
+                removeNoMoreNeededModelFromDatabase();
+            }
+
+        } catch (IOException | IllegalAccessException e) {
+            if (!isResumeSupported) {
+                deleteTempFile();
+            }
+            Error error = new Error();
+            error.setConnectionError(true);
+            error.setConnectionException(e);
+            response.setError(error);
+        } finally {
+            closeAllSafely(outputStream);
+        }
+
+        return response;
+    }
+
+    private void deleteTempFile() {
+        File file = new File(tempPath);
+        if (file.exists()) {
+            //noinspection ResultOfMethodCallIgnored
+            file.delete();
+        }
+    }
+
+    private boolean isSuccessful() {
+        return responseCode >= HttpURLConnection.HTTP_OK
+                && responseCode < HttpURLConnection.HTTP_MULT_CHOICE;
+    }
+
+    private void setResumeSupportedOrNot() {
+        isResumeSupported = (responseCode == HttpURLConnection.HTTP_PARTIAL);
+    }
+
+    private boolean checkIfFreshStartRequiredAndStart(DownloadModel model) throws IOException,
+            IllegalAccessException {
+        if (responseCode == Constants.HTTP_RANGE_NOT_SATISFIABLE || isETagChanged(model)) {
+            if (model != null) {
+                removeNoMoreNeededModelFromDatabase();
+            }
+            deleteTempFile();
+            request.setDownloadedBytes(0);
+            request.setTotalBytes(0);
+            httpClient = ComponentHolder.getInstance().getHttpClient();
+            httpClient.connect(request);
+            httpClient = Utils.getRedirectedConnectionIfAny(httpClient, request);
+            responseCode = httpClient.getResponseCode();
+            return true;
+        }
+        return false;
+    }
+
+    private boolean isETagChanged(DownloadModel model) {
+        return !(eTag == null || model == null || model.getETag() == null)
+                && !model.getETag().equals(eTag);
+    }
+
+    private DownloadModel getDownloadModelIfAlreadyPresentInDatabase() {
+        return ComponentHolder.getInstance().getDbHelper().find(request.getDownloadId());
+    }
+
+    private void createAndInsertNewModel() {
+        DownloadModel model = new DownloadModel();
+        model.setId(request.getDownloadId());
+        model.setUrl(request.getUrl());
+        model.setETag(eTag);
+        model.setDirPath(request.getDirPath());
+        model.setFileName(request.getFileName());
+        model.setDownloadedBytes(request.getDownloadedBytes());
+        model.setTotalBytes(totalBytes);
+        model.setLastModifiedAt(System.currentTimeMillis());
+        ComponentHolder.getInstance().getDbHelper().insert(model);
+    }
+
+    private void removeNoMoreNeededModelFromDatabase() {
+        ComponentHolder.getInstance().getDbHelper().remove(request.getDownloadId());
+    }
+
+    private void sendProgress() {
+        if (request.getStatus() != Status.CANCELLED) {
+            if (progressHandler != null) {
+                progressHandler
+                        .obtainMessage(Constants.UPDATE,
+                                new Progress(request.getDownloadedBytes(),
+                                        totalBytes)).sendToTarget();
+            }
+        }
+    }
+
+    private void syncIfRequired(FileDownloadOutputStream outputStream) {
+        final long currentBytes = request.getDownloadedBytes();
+        final long currentTime = System.currentTimeMillis();
+        final long bytesDelta = currentBytes - lastSyncBytes;
+        final long timeDelta = currentTime - lastSyncTime;
+        if (bytesDelta > MIN_BYTES_FOR_SYNC && timeDelta > TIME_GAP_FOR_SYNC) {
+            sync(outputStream);
+            lastSyncBytes = currentBytes;
+            lastSyncTime = currentTime;
+        }
+    }
+
+    private void sync(FileDownloadOutputStream outputStream) {
+        boolean success;
+        try {
+            outputStream.flushAndSync();
+            success = true;
+        } catch (IOException e) {
+            success = false;
+            e.printStackTrace();
+        }
+        if (success && isResumeSupported) {
+            ComponentHolder.getInstance().getDbHelper()
+                    .updateProgress(request.getDownloadId(),
+                            request.getDownloadedBytes(),
+                            System.currentTimeMillis());
+        }
+
+    }
+
+    private void closeAllSafely(FileDownloadOutputStream outputStream) {
+        if (httpClient != null) {
+            try {
+                httpClient.close();
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+        if (inputStream != null) {
+            try {
+                inputStream.close();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+        try {
+            if (outputStream != null) {
+                try {
+                    sync(outputStream);
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+            }
+        } finally {
+            if (outputStream != null)
+                try {
+                    outputStream.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+        }
+    }
+
+    private String convertStreamToString(InputStream stream) {
+        StringBuilder stringBuilder = new StringBuilder();
+        if (stream != null) {
+            String line;
+            BufferedReader bufferedReader = null;
+            try {
+                bufferedReader = new BufferedReader(new InputStreamReader(stream));
+                while ((line = bufferedReader.readLine()) != null) {
+                    stringBuilder.append(line);
+                }
+            } catch (IOException ignored) {
+
+            } finally {
+                try {
+                    if (bufferedReader != null) {
+                        bufferedReader.close();
+                    }
+                } catch (NullPointerException | IOException ignored) {
+
+                }
+            }
+        }
+        return stringBuilder.toString();
+    }
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/internal/SynchronousCall.java

@@ -0,0 +1,19 @@
+package com.downloader.internal;
+
+import com.downloader.Response;
+import com.downloader.request.DownloadRequest;
+
+public class SynchronousCall {
+
+    public final DownloadRequest request;
+
+    public SynchronousCall(DownloadRequest request) {
+        this.request = request;
+    }
+
+    public Response execute() {
+        DownloadTask downloadTask = DownloadTask.create(request);
+        return downloadTask.run();
+    }
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/internal/stream/FileDownloadOutputStream.java

@@ -0,0 +1,38 @@
+package com.downloader.internal.stream;
+
+
+import java.io.IOException;
+
+public interface FileDownloadOutputStream {
+
+    /**
+     * Writes <code>len</code> bytes from the specified byte array
+     * starting at offset <code>off</code> to this file.
+     */
+    void write(byte b[], int off, int len) throws IOException;
+
+    /**
+     * Flush all buffer to system and force all system buffers to synchronize with the underlying
+     * device.
+     */
+    void flushAndSync() throws IOException;
+
+    /**
+     * Closes this output stream and releases any system resources associated with this stream. The
+     * general contract of <code>close</code> is that it closes the output stream. A closed stream
+     * cannot perform output operations and cannot be reopened.
+     */
+    void close() throws IOException;
+
+    /**
+     * Sets the file-pointer offset, measured from the beginning of this file, at which the next
+     * read or write occurs.  The offset may be set beyond the end of the file.
+     */
+    void seek(long offset) throws IOException, IllegalAccessException;
+
+    /**
+     * Sets the length of this file.
+     */
+    void setLength(final long newLength) throws IOException, IllegalAccessException;
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/internal/stream/FileDownloadRandomAccessFile.java

@@ -0,0 +1,53 @@
+package com.downloader.internal.stream;
+
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileDescriptor;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+
+public class FileDownloadRandomAccessFile implements FileDownloadOutputStream {
+
+    private final BufferedOutputStream out;
+    private final FileDescriptor fd;
+    private final RandomAccessFile randomAccess;
+
+    private FileDownloadRandomAccessFile(File file) throws IOException {
+        randomAccess = new RandomAccessFile(file, "rw");
+        fd = randomAccess.getFD();
+        out = new BufferedOutputStream(new FileOutputStream(randomAccess.getFD()));
+    }
+
+    @Override
+    public void write(byte[] b, int off, int len) throws IOException {
+        out.write(b, off, len);
+    }
+
+    @Override
+    public void flushAndSync() throws IOException {
+        out.flush();
+        fd.sync();
+    }
+
+    @Override
+    public void close() throws IOException {
+        out.close();
+        randomAccess.close();
+    }
+
+    @Override
+    public void seek(long offset) throws IOException {
+        randomAccess.seek(offset);
+    }
+
+    @Override
+    public void setLength(long totalBytes) throws IOException {
+        randomAccess.setLength(totalBytes);
+    }
+
+    public static FileDownloadOutputStream create(File file) throws IOException {
+        return new FileDownloadRandomAccessFile(file);
+    }
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/request/DownloadRequest.java

@@ -0,0 +1,319 @@
+package com.downloader.request;
+
+import com.downloader.Error;
+import com.downloader.OnCancelListener;
+import com.downloader.OnDownloadListener;
+import com.downloader.OnPauseListener;
+import com.downloader.OnProgressListener;
+import com.downloader.OnStartOrResumeListener;
+import com.downloader.Priority;
+import com.downloader.Response;
+import com.downloader.Status;
+import com.downloader.core.Core;
+import com.downloader.internal.ComponentHolder;
+import com.downloader.internal.DownloadRequestQueue;
+import com.downloader.internal.SynchronousCall;
+import com.downloader.utils.Utils;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.concurrent.Future;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class DownloadRequest {
+
+    private Priority priority;
+    private Object tag;
+    private String url;
+    private String dirPath;
+    private String fileName;
+    private int sequenceNumber;
+    private Future future;
+    private long downloadedBytes;
+    private long totalBytes;
+    private int readTimeout;
+    private int connectTimeout;
+    private String userAgent;
+    private OnProgressListener onProgressListener;
+    private OnDownloadListener onDownloadListener;
+    private OnStartOrResumeListener onStartOrResumeListener;
+    private OnPauseListener onPauseListener;
+    private OnCancelListener onCancelListener;
+    private int downloadId;
+    private HashMap<String, List<String>> headerMap;
+    private Status status;
+
+    DownloadRequest(DownloadRequestBuilder builder) {
+        this.url = builder.url;
+        this.dirPath = builder.dirPath;
+        this.fileName = builder.fileName;
+        this.headerMap = builder.headerMap;
+        this.priority = builder.priority;
+        this.tag = builder.tag;
+        this.readTimeout =
+                builder.readTimeout != 0 ?
+                        builder.readTimeout :
+                        getReadTimeoutFromConfig();
+        this.connectTimeout =
+                builder.connectTimeout != 0 ?
+                        builder.connectTimeout :
+                        getConnectTimeoutFromConfig();
+        this.userAgent = builder.userAgent;
+    }
+
+    public Priority getPriority() {
+        return priority;
+    }
+
+    public void setPriority(Priority priority) {
+        this.priority = priority;
+    }
+
+    public Object getTag() {
+        return tag;
+    }
+
+    public void setTag(Object tag) {
+        this.tag = tag;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    public String getDirPath() {
+        return dirPath;
+    }
+
+    public void setDirPath(String dirPath) {
+        this.dirPath = dirPath;
+    }
+
+    public String getFileName() {
+        return fileName;
+    }
+
+    public void setFileName(String fileName) {
+        this.fileName = fileName;
+    }
+
+    public int getSequenceNumber() {
+        return sequenceNumber;
+    }
+
+    public void setSequenceNumber(int sequenceNumber) {
+        this.sequenceNumber = sequenceNumber;
+    }
+
+    public HashMap<String, List<String>> getHeaders() {
+        return headerMap;
+    }
+
+    public Future getFuture() {
+        return future;
+    }
+
+    public void setFuture(Future future) {
+        this.future = future;
+    }
+
+    public long getDownloadedBytes() {
+        return downloadedBytes;
+    }
+
+    public void setDownloadedBytes(long downloadedBytes) {
+        this.downloadedBytes = downloadedBytes;
+    }
+
+    public long getTotalBytes() {
+        return totalBytes;
+    }
+
+    public void setTotalBytes(long totalBytes) {
+        this.totalBytes = totalBytes;
+    }
+
+    public int getReadTimeout() {
+        return readTimeout;
+    }
+
+    public void setReadTimeout(int readTimeout) {
+        this.readTimeout = readTimeout;
+    }
+
+    public int getConnectTimeout() {
+        return connectTimeout;
+    }
+
+    public void setConnectTimeout(int connectTimeout) {
+        this.connectTimeout = connectTimeout;
+    }
+
+    public String getUserAgent() {
+        if (userAgent == null) {
+            userAgent = ComponentHolder.getInstance().getUserAgent();
+        }
+        return userAgent;
+    }
+
+    public void setUserAgent(String userAgent) {
+        this.userAgent = userAgent;
+    }
+
+    public int getDownloadId() {
+        return downloadId;
+    }
+
+    public void setDownloadId(int downloadId) {
+        this.downloadId = downloadId;
+    }
+
+    public Status getStatus() {
+        return status;
+    }
+
+    public void setStatus(Status status) {
+        this.status = status;
+    }
+
+    public OnProgressListener getOnProgressListener() {
+        return onProgressListener;
+    }
+
+    public DownloadRequest setOnStartOrResumeListener(OnStartOrResumeListener onStartOrResumeListener) {
+        this.onStartOrResumeListener = onStartOrResumeListener;
+        return this;
+    }
+
+    public DownloadRequest setOnProgressListener(OnProgressListener onProgressListener) {
+        this.onProgressListener = onProgressListener;
+        return this;
+    }
+
+    public DownloadRequest setOnPauseListener(OnPauseListener onPauseListener) {
+        this.onPauseListener = onPauseListener;
+        return this;
+    }
+
+    public DownloadRequest setOnCancelListener(OnCancelListener onCancelListener) {
+        this.onCancelListener = onCancelListener;
+        return this;
+    }
+
+    public int start(OnDownloadListener onDownloadListener) {
+        this.onDownloadListener = onDownloadListener;
+        downloadId = Utils.getUniqueId(url, dirPath, fileName);
+        DownloadRequestQueue.getInstance().addRequest(this);
+        return downloadId;
+    }
+
+    public Response executeSync() {
+        downloadId = Utils.getUniqueId(url, dirPath, fileName);
+        return new SynchronousCall(this).execute();
+    }
+
+    public void deliverError(final Error error) {
+        if (status != Status.CANCELLED) {
+            setStatus(Status.FAILED);
+            Core.getInstance().getExecutorSupplier().forMainThreadTasks()
+                    .execute(new Runnable() {
+                        public void run() {
+                            if (onDownloadListener != null) {
+                                onDownloadListener.onError(error);
+                            }
+                            finish();
+                        }
+                    });
+        }
+    }
+
+    public void deliverSuccess() {
+        if (status != Status.CANCELLED) {
+            setStatus(Status.COMPLETED);
+            Core.getInstance().getExecutorSupplier().forMainThreadTasks()
+                    .execute(new Runnable() {
+                        public void run() {
+                            if (onDownloadListener != null) {
+                                onDownloadListener.onDownloadComplete();
+                            }
+                            finish();
+                        }
+                    });
+        }
+    }
+
+    public void deliverStartEvent() {
+        if (status != Status.CANCELLED) {
+            Core.getInstance().getExecutorSupplier().forMainThreadTasks()
+                    .execute(new Runnable() {
+                        public void run() {
+                            if (onStartOrResumeListener != null) {
+                                onStartOrResumeListener.onStartOrResume();
+                            }
+                        }
+                    });
+        }
+    }
+
+    public void deliverPauseEvent() {
+        if (status != Status.CANCELLED) {
+            Core.getInstance().getExecutorSupplier().forMainThreadTasks()
+                    .execute(new Runnable() {
+                        public void run() {
+                            if (onPauseListener != null) {
+                                onPauseListener.onPause();
+                            }
+                        }
+                    });
+        }
+    }
+
+    private void deliverCancelEvent() {
+        Core.getInstance().getExecutorSupplier().forMainThreadTasks()
+                .execute(new Runnable() {
+                    public void run() {
+                        if (onCancelListener != null) {
+                            onCancelListener.onCancel();
+                        }
+                    }
+                });
+    }
+
+    public void cancel() {
+        status = Status.CANCELLED;
+        if (future != null) {
+            future.cancel(true);
+        }
+        deliverCancelEvent();
+        Utils.deleteTempFileAndDatabaseEntryInBackground(Utils.getTempPath(dirPath, fileName), downloadId);
+    }
+
+    private void finish() {
+        destroy();
+        DownloadRequestQueue.getInstance().finish(this);
+    }
+
+    private void destroy() {
+        this.onProgressListener = null;
+        this.onDownloadListener = null;
+        this.onStartOrResumeListener = null;
+        this.onPauseListener = null;
+        this.onCancelListener = null;
+    }
+
+    private int getReadTimeoutFromConfig() {
+        return ComponentHolder.getInstance().getReadTimeout();
+    }
+
+    private int getConnectTimeoutFromConfig() {
+        return ComponentHolder.getInstance().getConnectTimeout();
+    }
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/request/DownloadRequestBuilder.java

@@ -0,0 +1,81 @@
+package com.downloader.request;
+
+import com.downloader.Priority;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public class DownloadRequestBuilder implements RequestBuilder {
+
+    String url;
+    String dirPath;
+    String fileName;
+    Priority priority = Priority.MEDIUM;
+    Object tag;
+    int readTimeout;
+    int connectTimeout;
+    String userAgent;
+    HashMap<String, List<String>> headerMap;
+
+    public DownloadRequestBuilder(String url, String dirPath, String fileName) {
+        this.url = url;
+        this.dirPath = dirPath;
+        this.fileName = fileName;
+    }
+
+    @Override
+    public DownloadRequestBuilder setHeader(String name, String value) {
+        if (headerMap == null) {
+            headerMap = new HashMap<>();
+        }
+        List<String> list = headerMap.get(name);
+        if (list == null) {
+            list = new ArrayList<>();
+            headerMap.put(name, list);
+        }
+        if (!list.contains(value)) {
+            list.add(value);
+        }
+        return this;
+    }
+
+    @Override
+    public DownloadRequestBuilder setPriority(Priority priority) {
+        this.priority = priority;
+        return this;
+    }
+
+    @Override
+    public DownloadRequestBuilder setTag(Object tag) {
+        this.tag = tag;
+        return this;
+    }
+
+    @Override
+    public DownloadRequestBuilder setReadTimeout(int readTimeout) {
+        this.readTimeout = readTimeout;
+        return this;
+    }
+
+    @Override
+    public DownloadRequestBuilder setConnectTimeout(int connectTimeout) {
+        this.connectTimeout = connectTimeout;
+        return this;
+    }
+
+    @Override
+    public DownloadRequestBuilder setUserAgent(String userAgent) {
+        this.userAgent = userAgent;
+        return this;
+    }
+
+    public DownloadRequest build() {
+        return new DownloadRequest(this);
+    }
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/request/RequestBuilder.java

@@ -0,0 +1,23 @@
+package com.downloader.request;
+
+import com.downloader.Priority;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public interface RequestBuilder {
+
+    RequestBuilder setHeader(String name, String value);
+
+    RequestBuilder setPriority(Priority priority);
+
+    RequestBuilder setTag(Object tag);
+
+    RequestBuilder setReadTimeout(int readTimeout);
+
+    RequestBuilder setConnectTimeout(int connectTimeout);
+
+    RequestBuilder setUserAgent(String userAgent);
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/java/com/downloader/utils/Utils.java

@@ -0,0 +1,157 @@
+package com.downloader.utils;
+
+import com.downloader.Constants;
+import com.downloader.core.Core;
+import com.downloader.database.DownloadModel;
+import com.downloader.httpclient.HttpClient;
+import com.downloader.internal.ComponentHolder;
+import com.downloader.request.DownloadRequest;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.net.HttpURLConnection;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.List;
+
+/**
+ * Created by amitshekhar on 13/11/17.
+ */
+
+public final class Utils {
+
+    private final static int MAX_REDIRECTION = 10;
+
+    private Utils() {
+        // no instance
+    }
+
+    public static String getPath(String dirPath, String fileName) {
+        return dirPath + File.separator + fileName;
+    }
+
+    public static String getTempPath(String dirPath, String fileName) {
+        return getPath(dirPath, fileName) + ".temp";
+    }
+
+    public static void renameFileName(String oldPath, String newPath) throws IOException {
+        final File oldFile = new File(oldPath);
+        try {
+            final File newFile = new File(newPath);
+            if (newFile.exists()) {
+                if (!newFile.delete()) {
+                    throw new IOException("Deletion Failed");
+                }
+            }
+            if (!oldFile.renameTo(newFile)) {
+                throw new IOException("Rename Failed");
+            }
+        } finally {
+            if (oldFile.exists()) {
+                //noinspection ResultOfMethodCallIgnored
+                oldFile.delete();
+            }
+        }
+    }
+
+    public static void deleteTempFileAndDatabaseEntryInBackground(final String path, final int downloadId) {
+        Core.getInstance().getExecutorSupplier().forBackgroundTasks()
+                .execute(new Runnable() {
+                    @Override
+                    public void run() {
+                        ComponentHolder.getInstance().getDbHelper().remove(downloadId);
+                        File file = new File(path);
+                        if (file.exists()) {
+                            //noinspection ResultOfMethodCallIgnored
+                            file.delete();
+                        }
+                    }
+                });
+    }
+
+    public static void deleteUnwantedModelsAndTempFiles(final int days) {
+        Core.getInstance().getExecutorSupplier().forBackgroundTasks()
+                .execute(new Runnable() {
+                    @Override
+                    public void run() {
+                        List<DownloadModel> models = ComponentHolder.getInstance()
+                                .getDbHelper()
+                                .getUnwantedModels(days);
+                        if (models != null) {
+                            for (DownloadModel model : models) {
+                                final String tempPath = getTempPath(model.getDirPath(), model.getFileName());
+                                ComponentHolder.getInstance().getDbHelper().remove(model.getId());
+                                File file = new File(tempPath);
+                                if (file.exists()) {
+                                    //noinspection ResultOfMethodCallIgnored
+                                    file.delete();
+                                }
+                            }
+                        }
+                    }
+                });
+    }
+
+    public static int getUniqueId(String url, String dirPath, String fileName) {
+
+        String string = url + File.separator + dirPath + File.separator + fileName;
+
+        byte[] hash;
+
+        try {
+            hash = MessageDigest.getInstance("MD5").digest(string.getBytes("UTF-8"));
+        } catch (NoSuchAlgorithmException e) {
+            throw new RuntimeException("NoSuchAlgorithmException", e);
+        } catch (UnsupportedEncodingException e) {
+            throw new RuntimeException("UnsupportedEncodingException", e);
+        }
+
+        StringBuilder hex = new StringBuilder(hash.length * 2);
+
+        for (byte b : hash) {
+            if ((b & 0xFF) < 0x10) hex.append("0");
+            hex.append(Integer.toHexString(b & 0xFF));
+        }
+
+        return hex.toString().hashCode();
+
+    }
+
+    public static HttpClient getRedirectedConnectionIfAny(HttpClient httpClient,
+                                                          DownloadRequest request)
+            throws IOException, IllegalAccessException {
+        int redirectTimes = 0;
+        int code = httpClient.getResponseCode();
+        String location = httpClient.getResponseHeader("Location");
+
+        while (isRedirection(code)) {
+            if (location == null) {
+                throw new IllegalAccessException("Location is null");
+            }
+            httpClient.close();
+
+            request.setUrl(location);
+            httpClient = ComponentHolder.getInstance().getHttpClient();
+            httpClient.connect(request);
+            code = httpClient.getResponseCode();
+            location = httpClient.getResponseHeader("Location");
+            redirectTimes++;
+            if (redirectTimes >= MAX_REDIRECTION) {
+                throw new IllegalAccessException("Max redirection done");
+            }
+        }
+
+        return httpClient;
+    }
+
+    private static boolean isRedirection(int code) {
+        return code == HttpURLConnection.HTTP_MOVED_PERM
+                || code == HttpURLConnection.HTTP_MOVED_TEMP
+                || code == HttpURLConnection.HTTP_SEE_OTHER
+                || code == HttpURLConnection.HTTP_MULT_CHOICE
+                || code == Constants.HTTP_TEMPORARY_REDIRECT
+                || code == Constants.HTTP_PERMANENT_REDIRECT;
+    }
+
+}

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">downloader</string>
+</resources>

OnTime_Driver_live/lib/PRDownloader/prdownloader/src/test/java/com/downloader/ExampleUnitTest.java

@@ -0,0 +1,17 @@
+package com.downloader;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() throws Exception {
+        assertEquals(4, 2 + 2);
+    }
+}