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Commit 911284c6 authored by pfayoux's avatar pfayoux
Browse files

Make Pdf Viewer able to do http and https request to download pdf files.

parent 31de383e

app/src/main/java/com/gsnathan/pdfviewer/App.java

+8 −0
Original line number Diff line number Diff line
@@ -5,12 +5,20 @@ import android.content.res.Configuration; 


import com.jaredrummler.cyanea.Cyanea;



import java.util.Properties;



public class App extends Application {



    @Override

    public void onCreate() {

        super.onCreate();

        Cyanea.init(this, getResources());

        Properties system = System.getProperties();

        system.put("http.proxyHost", "localhost");

        system.put("http.proxyPort", "80");



        system.put("https.proxyHost", "localhost");

        system.put("https.proxyPort", "80");

    }



    @Override

app/src/main/java/com/gsnathan/pdfviewer/MainActivity.java

+23 −22
Original line number Diff line number Diff line
@@ -93,20 +93,19 @@ public class MainActivity extends ProgressActivity implements OnPageChangeListen 
    private PrintManager mgr = null;



    private final static int REQUEST_CODE = 42;

    public static final int PERMISSION_SAVE = 1;

    public static final int PERMISSION_CODE = 42042;



    public static final int PERMISSION_WRITE = 42041;

    public static final int PERMISSION_READ = 42042;



    public static final String SAMPLE_FILE = "pdf_sample.pdf";

    public static final String READ_EXTERNAL_STORAGE = "android.permission.READ_EXTERNAL_STORAGE";

    private static String PDF_PASSWORD = "";

    private SharedPreferences prefManager;







    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        pdfFileName = "";



        prefManager = PreferenceManager.getDefaultSharedPreferences(this);

        onFirstInstall();

        onFirstUpdate();
@@ -183,13 +182,13 @@ public class MainActivity extends ProgressActivity implements OnPageChangeListen 


    private void pickFile() {

        int permissionCheck = ContextCompat.checkSelfPermission(this,

                READ_EXTERNAL_STORAGE);

                Manifest.permission.READ_EXTERNAL_STORAGE);



        if (permissionCheck != PackageManager.PERMISSION_GRANTED) {

            ActivityCompat.requestPermissions(

                    this,

                    new String[]{READ_EXTERNAL_STORAGE},

                    PERMISSION_CODE

                    new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},

                    PERMISSION_READ

            );



            return;
@@ -290,8 +289,9 @@ public class MainActivity extends ProgressActivity implements OnPageChangeListen 
        SharedPreferences.Editor editor = prefManager.edit();

        editor.putString("uri", uri.toString());

        editor.apply();

        String scheme = uri.getScheme();



        if (uri.getScheme().contains("http")) {

        if (scheme != null && scheme.contains("http")) {

            // we will get the pdf asynchronously with the RetrievePDFStream object

            RetrievePDFStream retrievePDFStream = new RetrievePDFStream(this);

            retrievePDFStream.execute(uri.toString(), pdfFileName);
@@ -362,20 +362,22 @@ public class MainActivity extends ProgressActivity implements OnPageChangeListen 
            } else {

                // case if the permission hasn't been granted, we will store the pdf in a temp file

                //store the temporary file path, to be able to save it when permission will be granted

                pdfTempFilePath = tempFile.getPath();





                // request for the permission to write to external storage

                requestPermissions(

                ActivityCompat.requestPermissions(

                        this,

                        new String[] {

                                Manifest.permission.WRITE_EXTERNAL_STORAGE,

                                Manifest.permission.READ_EXTERNAL_STORAGE

                        },

                        PERMISSION_SAVE

                        PERMISSION_WRITE

                );

                return pdfTempFilePath;

            }

        } catch (IOException e) {

            Log.e(TAG, "ERROR FILE " + e.getMessage() + e.getStackTrace());

            Log.e(TAG, "Error on file : " + e.getMessage());

            e.printStackTrace();

        }



        return null;
@@ -401,7 +403,7 @@ public class MainActivity extends ProgressActivity implements OnPageChangeListen 


    public String getFileName(Uri uri) {

        String result = null;

        if (uri.getScheme().equals("content")) {

        if (uri.getScheme() != null && uri.getScheme().equals("content")) {

            Cursor cursor = getContentResolver().query(uri, null, null, null, null);

            try {

                if (cursor != null && cursor.moveToFirst()) {
@@ -484,17 +486,17 @@ public class MainActivity extends ProgressActivity implements OnPageChangeListen 
    }



    @Override

    public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[],

    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,

                                           @NonNull int[] grantResults) {

        int indexPermission = 0;

        int indexPermission;

        switch (requestCode) {

            case PERMISSION_CODE:

            case PERMISSION_READ:

                indexPermission = Arrays.asList(permissions).indexOf(Manifest.permission.READ_EXTERNAL_STORAGE);

                if (indexPermission != -1 && grantResults[indexPermission] == PackageManager.PERMISSION_GRANTED) {

                    launchPicker();

                }

                break;

            case PERMISSION_SAVE:

            case PERMISSION_WRITE:

                indexPermission = Arrays.asList(permissions).indexOf(Manifest.permission.WRITE_EXTERNAL_STORAGE);

                if (indexPermission != -1 && grantResults[indexPermission] == PackageManager.PERMISSION_GRANTED) {

                    File file = new File(pdfTempFilePath);
@@ -504,7 +506,6 @@ public class MainActivity extends ProgressActivity implements OnPageChangeListen 
        }

    }





    @Override

    public void onPageError(int page, Throwable t) {

        Log.e(TAG, "Cannot load page " + page);

app/src/main/java/com/gsnathan/pdfviewer/RetrievePDFStream.java

+47 −15
Original line number Diff line number Diff line
@@ -2,23 +2,26 @@ package com.gsnathan.pdfviewer; 


import android.os.AsyncTask;

import android.util.Log;

import android.widget.Toast;



import java.io.BufferedInputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.lang.ref.WeakReference;

import java.net.HttpURLConnection;

import java.net.URL;

import java.security.cert.Certificate;



import javax.net.ssl.HttpsURLConnection;

import javax.net.ssl.SSLPeerUnverifiedException;



/**

 * This class is used to get a Stream from an URL

 */

public class RetrievePDFStream extends AsyncTask<String, Void, File> {



    // a reference to our MainActivity, this is used to be able to call displayFromFile()

    // a reference to our MainActivity, this is used to be able to call displayFromStream()

    private WeakReference<MainActivity> mainActivityWR;



    public RetrievePDFStream(MainActivity activity) {
@@ -28,20 +31,49 @@ public class RetrievePDFStream extends AsyncTask<String, Void, File> { 
    @Override

    protected File doInBackground(String... strings) {

        File file = null;

        String url = strings [0];

        String filename = strings[1];

        InputStream inputStream = null;

        MainActivity activity = mainActivityWR.get();



        try {

            URL uri = new URL(strings[0]);

            HttpURLConnection urlConnection = (HttpURLConnection) uri.openConnection();

            URL uri = new URL(url);



            if (url.startsWith("https")) {

                Log.i("RetrievePDFStream", "HTTPS CONNECTION");

                HttpsURLConnection urlConnection = (HttpsURLConnection) uri.openConnection();

                urlConnection.connect();

                if (urlConnection.getResponseCode() == 200) {

                    Certificate[] certs = urlConnection.getServerCertificates();

                    for (Certificate cert : certs)

                        Log.i("RetrievePDFStream", "Certificate : " +

                                "\n - Type : " + cert.getType() +

                                "\n - Hash Code : " + cert.hashCode() +

                                "\n - Public Key Algorithm : " + cert.getPublicKey().getAlgorithm() +

                                "\n - Public Key Format : " + cert.getPublicKey().getFormat()

                        );

                    inputStream = new BufferedInputStream(urlConnection.getInputStream());

                    file = Utils.createFileFromInputStream(activity.getCacheDir(), filename, inputStream);

                }

                urlConnection.disconnect();



            file = File.createTempFile(strings[1], null, activity.getCacheDir());

            OutputStream outputStream = new FileOutputStream(file);

            Utils.readFromInputStreamToOutputStream(inputStream, outputStream);

            } else {

                Log.i("RetrievePDFStream", "HTTP CONNECTION");

                HttpURLConnection urlConnection = (HttpURLConnection) uri.openConnection();

                urlConnection.connect();

                if (urlConnection.getResponseCode() == 200) {

                    inputStream = new BufferedInputStream(urlConnection.getInputStream());

                    file = Utils.createFileFromInputStream(activity.getCacheDir(), filename, inputStream);

                }

                urlConnection.disconnect();

            }

        } catch (SSLPeerUnverifiedException e) {

            Log.e("RetrievePDFStream", "Error SSL");

            Toast.makeText(activity, R.string.toast_pick_file_error, Toast.LENGTH_SHORT).show();

            return null;

        } catch (IOException e) {

            Log.e("RetrievePDFStream", "Error cannot get file at URL");

            Log.e("RetrievePDFStream", "Error cannot get file at URL :" + url);

            e.printStackTrace();

            return null;

        }
@@ -52,7 +84,7 @@ public class RetrievePDFStream extends AsyncTask<String, Void, File> { 
    protected void onPostExecute(File file) {

        MainActivity activity = mainActivityWR.get();



        if (activity != null) {

        if (activity != null && file != null) {

            activity.saveFileAndDisplay(file);

        }

    }

app/src/main/java/com/gsnathan/pdfviewer/Utils.java

+9 −0
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 


package com.gsnathan.pdfviewer;



import android.app.Activity;

import android.content.Context;

import android.content.DialogInterface;

import android.content.Intent;
@@ -36,6 +37,7 @@ import android.os.Build; 
import android.util.Log;



import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;
@@ -114,4 +116,11 @@ public class Utils { 
        outputStream.flush();

        outputStream.close();

    }



    static File createFileFromInputStream (File cacheDir, String fileName, InputStream inputStream) throws IOException {

        File file = File.createTempFile(fileName, null, cacheDir);

        OutputStream outputStream = new FileOutputStream(file);

        Utils.readFromInputStreamToOutputStream(inputStream, outputStream);

        return file;

    }

}

app/src/main/res/values-de/strings.xml

+1 −0
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ 
<resources>

    <string name="pick_file">Datei auswählen</string>

    <string name="toast_pick_file_error">Datei konnte nicht ausgewählt werden. Bitte überprüfen Sie Ihren Dateimanager.</string>

    <string name="toast_ssl_error">Sichere Verbindung fehlgeschlagen.</string>

    <string name="action_about">Über</string>

    <string name="version">Version</string>

    <string name="intro">Einführung wiederholen</string>