Develop Reference

Discord JDA Save a file attachment that was included in a message

The code is as follows:
package volmbot.commands;
import lombok.SneakyThrows;
import net.dv8tion.jda.api.events.message.guild.GuildMessageReceivedEvent;
import net.dv8tion.jda.api.hooks.ListenerAdapter;
import java.io.FileOutputStream;
import java.io.ObjectOutputStream;
public class SandBox extends ListenerAdapter {
#SneakyThrows
public void onGuildMessageReceived(GuildMessageReceivedEvent e) {
String[] args = e.getMessage().getContentRaw().split(" ");
e.getMessage().getAttachments();
String authId = e.getMessage().getAuthor().getId();
//Grab file and save it as the user's ID
FileOutputStream saveFile = new FileOutputStream(authId + ".txt");
ObjectOutputStream save = new ObjectOutputStream(saveFile);
save.writeObject(e.getMessage().getAttachments());
save.close();
}
}
My goal is to do the following:
Save the file that the user sent in a message (if the message has an attachment)
Ignore it if the message does not contain a message
Save to a file with the user's ID as id.txt
I've tried using a Filestream, but I might be doing something wrong.
How would I manage so grab the messages attachment, assuming it has an attachment, then save the file?

You can use downloadToFile(name):
List<Message.Attachment> attachments = event.getMessage().getAttachments();
if (attachments.isEmpty()) return; // no attachments on the message!
CompletableFuture<File> future = attachments.get(0).downloadToFile(authId + ".txt");
future.exceptionally(error -> { // handle possible errors
error.printStackTrace();
return null;
});

Google Cloud Speech To Text Giving 0 result

I'm using Google Cloud Speech to text api in Java.
I'm getting 0 results when I call speechClient.recognize
pom.xml:
<dependency>
<groupId>com.google.cloud</groupId>
<artifactId>google-cloud-speech</artifactId>
<version>0.80.0-beta</version>
</dependency>
Java code:
import java.io.FileInputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import com.google.api.gax.core.FixedCredentialsProvider;
import com.google.auth.oauth2.GoogleCredentials;
import com.google.cloud.speech.v1.RecognitionAudio;
import com.google.cloud.speech.v1.RecognitionConfig;
import com.google.cloud.speech.v1.RecognitionConfig.AudioEncoding;
import com.google.cloud.speech.v1.RecognizeResponse;
import com.google.cloud.speech.v1.SpeechClient;
import com.google.cloud.speech.v1.SpeechRecognitionAlternative;
import com.google.cloud.speech.v1.SpeechRecognitionResult;
import com.google.cloud.speech.v1.SpeechSettings;
import com.google.protobuf.ByteString;
public class SpeechToText {
public static void main(String[] args) {
// Instantiates a client
try {
String jsonFilePath = System.getProperty("user.dir") + "/serviceaccount.json";
FileInputStream credentialsStream = new FileInputStream(jsonFilePath);
GoogleCredentials credentials = GoogleCredentials.fromStream(credentialsStream);
FixedCredentialsProvider credentialsProvider = FixedCredentialsProvider.create(credentials);
SpeechSettings speechSettings =
SpeechSettings.newBuilder()
.setCredentialsProvider(credentialsProvider)
.build();
SpeechClient speechClient = SpeechClient.create(speechSettings);
//SpeechClient speechClient = SpeechClient.create();
// The path to the audio file to transcribe
String fileName = System.getProperty("user.dir") + "/call-recording-790.opus";
// Reads the audio file into memory
Path path = Paths.get(fileName);
byte[] data = Files.readAllBytes(path);
ByteString audioBytes = ByteString.copyFrom(data);
System.out.println(path.toAbsolutePath());
// Builds the sync recognize request
RecognitionConfig config = RecognitionConfig.newBuilder().setEncoding(AudioEncoding.LINEAR16)
.setSampleRateHertz(8000).setLanguageCode("en-US").build();
RecognitionAudio audio = RecognitionAudio.newBuilder().setContent(audioBytes).build();
System.out.println("recognize builder");
// Performs speech recognition on the audio file
RecognizeResponse response = speechClient.recognize(config, audio);
List<SpeechRecognitionResult> results = response.getResultsList();
System.out.println(results.size()); // ***** HERE 0
for (SpeechRecognitionResult result : results) {
// There can be several alternative transcripts for a given chunk of speech.
// Just use the
// first (most likely) one here.
SpeechRecognitionAlternative alternative = result.getAlternativesList().get(0);
System.out.printf("Transcription: %s%n", alternative.getTranscript());
}
} catch (Exception e) {
System.out.println(e);
}
}
}
In the code above, I'm getting results.size as 0. When I upload the same opus file on demo at https://cloud.google.com/speech-to-text/, it gives output text correctly.
So why is the recognize call giving zero results?

There could be 3 reasons for Speech-to-Text to return an empty response:
Audio is not clear.
Audio is not intelligible.
Audio is not using the proper encoding.
From what I can see, reason 3 is the most possible cause of your issue. To resolve this, check this page to know how to verify the encoding of your audio file which must match the parameters you sent in InitialRecognizeRequest.

How to get text of a toaster message in mobile app using Appium

I am trying to verify a toaster message in Android Mobile app but not able to get text of toaster message as it doesn't show in uiautomatorviewer.
Got some information that by the help of OCR it can be done taking screenshots and fetching the text from that screenshots
Can anyone help me out how to do this step by step using java in Appium project?

You can follow the information on the below links to install the Tesseract on your machine:
For Mac: http://emop.tamu.edu/Installing-Tesseract-Mac
For Windows: http://emop.tamu.edu/Installing-Tesseract-Windows8
After installing the TessEract on your machine you need to add the dependency of TessEract Java library in your project. If you are using Maven for it, adding below dependency will work:
<dependency>
<groupId>org.bytedeco.javacpp-presets</groupId>
<artifactId>tesseract</artifactId>
<version>3.04-1.1</version>
</dependency>
Also the 'Step 3' which is mentioned by Ivan need not to be followed.
If you are using 'TestNG' the TessEract API needs to be initialised only once so instead of initialising it every time, as per your framework you can initialise it either in the 'BeforeTest' or 'BeforeSuite' or 'BeforeClass' method and accordingly close the API either in 'AfterTest' or 'AfterSuite' or 'AfterClass' method.
Below is the code that I have written to achieve it.
import static org.bytedeco.javacpp.lept.pixDestroy;
import static org.bytedeco.javacpp.lept.pixRead;
import java.io.File;
import java.io.IOException;
import org.apache.commons.io.FileUtils;
import org.bytedeco.javacpp.lept.PIX;
import org.bytedeco.javacpp.tesseract.TessBaseAPI;
import org.openqa.selenium.OutputType;
import org.openqa.selenium.TakesScreenshot;
import org.testng.annotations.AfterSuite;
import org.testng.annotations.BeforeSuite;
public class BaseTest {
static TessBaseAPI api = new TessBaseAPI();
#BeforeSuite
public void beforeSuit() throws IOException {
File screenshotsDirec = new File("target/screenshots");
if (screenshotsDirec.exists())
FileUtils.forceDelete(screenshotsDirec);
FileUtils.forceMkdir(screenshotsDirec);
System.out.println("Initializing TessEract library");
if (api.Init("/opt/local/share", "eng") != 0) {
System.err.println("Could not initialize tesseract.");
}
}
public synchronized boolean verifyToastMessage(String msg)
throws IOException {
TakesScreenshot takeScreenshot = ((TakesScreenshot) driver);
File[] screenshots = new File[5];
for (int i = 0; i < screenshots.length; i++) {
screenshots[i] = takeScreenshot.getScreenshotAs(OutputType.FILE);
}
String outText;
Boolean isMsgContains = false;
for (int i = 0; i < screenshots.length; i++) {
PIX image = pixRead(screenshots[i].getAbsolutePath());
api.SetImage(image);
outText = api.GetUTF8Text().getString().replaceAll("\\s", "");
System.out.println(outText);
isMsgContains = outText.contains(msg);
pixDestroy(image);
if (isMsgContains) {
break;
}
}
return isMsgContains;
}
#AfterSuite()
public void afterTest() {
try {
api.close();
} catch (Exception e) {
api.End();
e.printStackTrace();
}
}
}
I would also like to add that writing tests to read and verify the Toast messages in this way is not very much reliable as in one of my tests this code successfully captures the Toast message while in another test it fails to capture the toast message because the capturing of the screenshots starts when the toast message disappears. That was the reason I tried to write this code very much efficiently. However that also does not serve the purpose.

Follow this discussion on Appium forum: https://discuss.appium.io/t/verifying-toast/3676.
Basic steps to verify a Toaster are:
Perform action to trigger the toast message to appear on screen
Take x number of screenshots
Increase resolutions of all screenshots
Use tessearct OCR to detect the toast message.
Refer this repo to use Java OCR library (see at the bottom):
import org.bytedeco.javacpp.*;
import static org.bytedeco.javacpp.lept.*;
import static org.bytedeco.javacpp.tesseract.*;
public class BasicExample {
public static void main(String[] args) {
BytePointer outText;
TessBaseAPI api = new TessBaseAPI();
// Initialize tesseract-ocr with English, without specifying tessdata path
if (api.Init(null, "eng") != 0) {
System.err.println("Could not initialize tesseract.");
System.exit(1);
}
// Open input image with leptonica library
PIX image = pixRead(args.length > 0 ? args[0] : "/usr/src/tesseract/testing/phototest.tif");
api.SetImage(image);
// Get OCR result
outText = api.GetUTF8Text();
System.out.println("OCR output:\n" + outText.getString());
// Destroy used object and release memory
api.End();
outText.deallocate();
pixDestroy(image);
}
}

How to handle a webrequest POST server side

I'm new to webserver work. I am trying to make a webrequest POST from a C# client to my Java webservice. I believe the POST is being done successfully but I do not know how to tell the server to retrieve and use the POST data.
This is my code in Java right now:
//import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.iharder.encoders.Base64;
import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.HybridBinarizer;
#Service("FCBarcodeRecognitionService")
public class DecodeBarcodeFromImageActivity extends Activity {
private static final Log LOG = LogFactory
.getLog(DecodeBarcodeFromImageActivity.class);
#Operation("DecodeBarcodeFromImage")
#Documentation("Attempt to decode a barcode from POST image data.\n Returns a String of the decoded barcode and the type\n of barcode detected if successful.")
public DecodeFromImageOutput enact(DecodeFromImageInput input)
throws DependencyException {
DecodeFromImageOutput output = new DecodeFromImageOutput();
LOG.debug("Received DecodeFromBarcodeImage request...");
// Decode the images from the String arguments. They could
// potentially be in any encoding format. (e.g. Base64)
//How do I retrieve the POST data to use inside this operation??
//I have something like this now
ImageEncoder imageEncoder = new ImageEncoder();
//the current input is just something I'm manually giving it. I want it to be the encoded image from the POST data
List<BufferedImage> bufferedImgs = imageEncoder.decodeImageData(input);
LOG.debug("Received " + bufferedImgs.size() + " images from decoder.");
// Attempt to read a barcode (this will just pass the POST data, once I get it to my decode method)
try {
DecodedBarcode barcode = recognizeBarcodeFromImages(input, bufferedImgs);
output.setDecodedBarcode(barcode);
This is my code in C# right now:
//I am trying to POST an encoded (base64) image
WebRequest serverReq = WebRequest.Create("http://saxtonl.desktop.amazon.com:8000/explorer");
serverReq.Method = "POST";
serverReq.ContentType = "application/x-www-form-urlencoded";
serverReq.ContentLength = base64String.Length;
Stream dataStream = serverReq.GetRequestStream();
dataStream.Write(imageBytes, 0, imageBytes.Length);
dataStream.Close();
WebResponse serverRsp = serverReq.GetResponse();
Console.WriteLine(((HttpWebResponse)serverRsp).StatusDescription);
dataStream = serverRsp.GetResponseStream();
StreamReader reader = new StreamReader(dataStream);
string responseFromServer = reader.ReadToEnd();
Console.WriteLine(responseFromServer);
reader.Close();
dataStream.Close();
serverRsp.Close();

java flickr and flickrj download user pictures

Hi I am new to flickrj library.
Have foundational java knowledge though.
The project that I am working on requires me to authenticate into flickr and then download geo-tagged images into a folder in local hard drive. The program will be Desktop application program.
I am approaching the program by breaking down into 3 steps.
1.Proper authentication to be completed.(which i have succeeded)
2.Try to download all the photos that user has when authenticated.
3.Try to alter the code a little so that it will only download geo-tagged images.
My problems is on step 2. I cant download logged-in user images let alone geo-tagged ones.
I am trying the code provided by Daniel Cukier here
But I am running into problem.
My netbeans simply strike off at the line 77 on .getOriginalAsStream() part, with the error "java.lang.RuntimeException: Uncompilable source code - Erroneous sym type: java.io.ByteArrayOutputStream.write"
From my understanding netbeans striking off a line means , it is depreciated but shouldnt it still work? What is holding this whole problem back?
I have tried researching and basically I have to admit , it is beyond my capability to trouble shoot. If anyone has any idea on what i am doing wrong , I would be so grateful.
Ps: I am not looking to be spoon fed but please answer me in idiot-friendly way as I am still a student and my java isn't the greatest.
This code is what I have so far.
import com.aetrion.flickr.*;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.Properties;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
import com.aetrion.flickr.auth.Auth;
import com.aetrion.flickr.auth.AuthInterface;
import com.aetrion.flickr.auth.Permission;
import com.aetrion.flickr.photos.Photo;
import com.aetrion.flickr.photos.PhotoList;
import com.aetrion.flickr.photos.PhotosInterface;
import com.aetrion.flickr.util.IOUtilities;
import java.io.*;
import java.util.Iterator;
import org.apache.commons.io.FileUtils;
public class authenticate {
Flickr f;
RequestContext requestContext;
String frob = "";
String token = "";
Properties properties = null;
public authenticate() throws ParserConfigurationException, IOException, SAXException {
InputStream in = null;
try {
in = getClass().getResourceAsStream("/setup.properties");
properties = new Properties();
properties.load(in);
} finally {
IOUtilities.close(in);
}
f = new Flickr(
properties.getProperty("apiKey"),
properties.getProperty("secret"),
new REST()
);
Flickr.debugStream = false;
requestContext = RequestContext.getRequestContext();
AuthInterface authInterface = f.getAuthInterface();
try {
frob = authInterface.getFrob();
} catch (FlickrException e) {
e.printStackTrace();
}
System.out.println("frob: " + frob);
URL url = authInterface.buildAuthenticationUrl(Permission.DELETE, frob);
System.out.println("Press return after you granted access at this URL:");
System.out.println(url.toExternalForm());
BufferedReader infile =
new BufferedReader ( new InputStreamReader (System.in) );
String line = infile.readLine();
try {
Auth auth = authInterface.getToken(frob);
System.out.println("Authentication success");
// This token can be used until the user revokes it.
System.out.println("Token: " + auth.getToken());
System.out.println("nsid: " + auth.getUser().getId());
System.out.println("Realname: " + auth.getUser().getRealName());
System.out.println("Username: " + auth.getUser().getUsername());
System.out.println("Permission: " + auth.getPermission().getType());
PhotoList list = f.getPhotosetsInterface().getPhotos("72157629794698308", 100, 1);
for (Iterator iterator = list.iterator(); iterator.hasNext();) {
Photo photo = (Photo) iterator.next();
File file = new File("/tmp/" + photo.getId() + ".jpg");
ByteArrayOutputStream b = new ByteArrayOutputStream();
b.write(photo.getOriginalAsStream());
FileUtils.writeByteArrayToFile(file, b.toByteArray());
}
} catch (FlickrException e) {
System.out.println("Authentication failed");
e.printStackTrace();
}
}
public static void main(String[] args) {
try {
authenticate t = new authenticate();
} catch(Exception e) {
e.printStackTrace();
}
System.exit(0);
}
}

You are correct in your interpretation of the strikeout that getOriginalAsStream() is deprecated. It looks like you might want to rework your code to use PhotosInterface.getImageAsStream(), passing the ORIGINAL size as one of the arguments.
To adjust NetBeans' behavior with respect to deprecated methods, you can follow the link recommended by #AljoshaBre as well as this one.

If you want download all your photos from Flickr, this is possible if you have a mac computer.
Download Aperture program on Apple Store and install it.
After to install, open the Aperture.
Go on preferences.
Click on 'Accounts' tab.
Click on plus sign (+) on bottom left to add a photo service.
Add the Flicker option.
Follow the login and authorization instructions.
Done! All your photos will be synchronized in you aperture library locate on ~/images/
I hope I have helped.