I am using below code for SSL pinning in Kotlin Multiplatform using Ktor.
I am having crash at this line of code
val remoteCertificateData : NSData = SecCertificateCopyData(certificate) as NSData
Here is the function.
override fun URLSession(
session: NSURLSession,
didReceiveChallenge: NSURLAuthenticationChallenge,
completionHandler: (NSURLSessionAuthChallengeDisposition, NSURLCredential?) -> Unit
) {
val serverTrust = didReceiveChallenge.protectionSpace.serverTrust
val certificate = SecTrustGetCertificateAtIndex(serverTrust,0)
var result: SecTrustResultType = 0u
memScoped{
val nativeResult = alloc<SecTrustResultTypeVar>()
nativeResult.value = result
SecTrustEvaluate(serverTrust!!, nativeResult.ptr)
}
val remoteCertificateData : NSData = SecCertificateCopyData(certificate) as NSData
val bundle = NSBundle.bundleForClass(objc_getRequiredClass("IosClientEngine"))
val pathToCert = bundle.pathForResource("MyCertificate","cer")
val localCertificate : NSData = NSData.dataWithContentsOfFile(pathToCert!!)!!
if (localCertificate == remoteCertificateData) {
completionHandler(NSURLSessionAuthChallengeUseCredential,NSURLCredential.create(serverTrust))
} else {
completionHandler(NSURLSessionAuthChallengeUseCredential, null)
}
}
After so many research I manage to convert iOS code in Kotlin Multiplatform for iOS.
override fun URLSession(
session: NSURLSession,
didReceiveChallenge: NSURLAuthenticationChallenge,
completionHandler: (NSURLSessionAuthChallengeDisposition, NSURLCredential?) -> Unit
) {
val serverTrust = didReceiveChallenge.protectionSpace.serverTrust
var result: SecTrustResultType = 0u
memScoped{
val nativeResult = alloc<SecTrustResultTypeVar>()
nativeResult.value = result
SecTrustEvaluate(serverTrust!!, nativeResult.ptr)
}
val serverCertificate = SecTrustGetCertificateAtIndex(serverTrust,0)
val serverCertificateData = SecCertificateCopyData(serverCertificate)
val data = CFDataGetBytePtr(serverCertificateData)
val size = CFDataGetLength(serverCertificateData)
val cert1 = NSData.dataWithBytes(data,size.toULong())
val pathToCert = NSBundle.mainBundle.pathForResource("Your Certificate","cer")
val localCertificate : NSData = NSData.dataWithContentsOfFile(pathToCert!!)!!
if (localCertificate == cert1) {
completionHandler(NSURLSessionAuthChallengeUseCredential,NSURLCredential.create(serverTrust))
} else {
completionHandler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, null)
}
}
Related
I am trying to do dictionary app using kotlin language. I built the project with mvvm and clean architecture. I have been trying to pull vocabulary information from the internet using jsoap. I am using flow for data. I couldnt find where the issiue is. Normally, the words should appear on the screen or I should be able to see the data when I println on the console.But I can't see it on the screen or on the console, probably because the data coming from the internet is as follows.
kotlinx.coroutines.flow.SafeFlow#1493a74
I am sharing my codes below
ExtractedData
data class ExtractedData(
var id :Int = 0,
var word:String = "",
var meaning :String = ""
)
I created ExtractedData class to represent vocabulary or word data from internet
WordInfoRepositoryImpl
class WordInfoRepositoryImpl #Inject constructor(
private val api:DictionaryApi
) : WordInfoRepository {
//get words with meanings on the internet using jsoap
override fun getEventsList(): Flow<Resource<MutableList<ExtractedData>>> = flow {
emit(Resource.Loading())
val listData = mutableListOf<ExtractedData>()
try {
val url = "https://ielts.com.au/australia/prepare/article-100-new-english-words-and-phrases-updated-2020"
val doc = withContext(Dispatchers.IO){
Jsoup.connect(url).get()//-->Here it gives the following warning even though I have it in withContext `Inappropriate blocking method call`
}
val table = doc.select("table")
val rows = table.select("tr")
val eventsSize = rows.size
for (i in 1 until eventsSize) {
val row = rows[i]
val cols = row.select("td")
val word = cols[0].text()
val meaning = cols[1].text()
listData.add(ExtractedData(i,word,meaning))
}
}
catch (e: IOException) {
emit(Resource.Error("IO Exception"))
}
catch (e : HttpException) {
emit(Resource.Error("HTTP EXCEPTION"))
}
emit(Resource.Success(listData))
}
}
getEventsList is in my WordInfoRepositoryImpl class in my data layer here I am pulling data from internet using jsoap
WordInfoRepository
interface WordInfoRepository {
fun getEventsList(): Flow<Resource<MutableList<ExtractedData>>>
}
this is the interface that I reference wordInforepositoryImpl in the data layer in my interface domain layer
GetWordsAndMeaningsOnTheInternetUseCase
class GetWordsAndMeaningsOnTheInternetUseCase#Inject constructor(
private val repository: WordInfoRepository
){
operator fun invoke() : Flow<Resource<MutableList<ExtractedData>>> {
return repository.getEventsList()
}
}
GetWordsAndMeaningsOnTheInternetUseCase is my usecase in my domain layer
ViewModel
#HiltViewModel
class MostUsedWordScreenViewModel #Inject constructor(
private val getWordsAndMeaningsOnTheInternetUseCase: GetWordsAndMeaningsOnTheInternetUseCase
) : ViewModel() {
private var searchJob: Job? = null
private val _state = mutableStateOf(MostUsedWordState())
val state: State<MostUsedWordState> = _state
init {
fetchData()
}
private fun fetchData() {
searchJob?.cancel()
searchJob = viewModelScope.launch(IO) {
getWordsAndMeaningsOnTheInternetUseCase().onEach { result ->
when (result) {
is Resource.Success -> {
_state.value = state.value.copy(
mostWordUsedItems = result.data ?: mutableListOf(),
isLoading = false
)
}
is Resource.Error -> {
_state.value = state.value.copy(
mostWordUsedItems = result.data ?: mutableListOf(),
isLoading = false
)
}
is Resource.Loading -> {
_state.value = state.value.copy(
mostWordUsedItems = result.data ?: mutableListOf(),
isLoading = true
)
}
}
}
}
}
}
MostUsedWordScreen
#Composable
fun MostUsedWordScreen(viewModel: MostUsedWordScreenViewModel = hiltViewModel()) {
val state = viewModel.state.value
println("state --- >>> "+state.mostWordUsedItems)
LazyColumn(
modifier = Modifier.fillMaxSize()
) {
items(state.mostWordUsedItems.size) { i ->
val wordInfo = state.mostWordUsedItems[i]
if(i > 0) {
Spacer(modifier = Modifier.height(8.dp))
}
MostUsedWordItem(word = wordInfo)
if(i < state.mostWordUsedItems.size - 1) {
Divider()
}
}
}
}
#Composable
fun MostUsedWordItem(word : ExtractedData ) {
// println("this is MostUsedWordItem")
Column(modifier = Modifier
.padding(5.dp)
.fillMaxWidth()) {
Text(text = word.word,
modifier = Modifier.padding(3.dp),
textAlign = TextAlign.Center,
fontSize = 18.sp,
)
}
}
It is included in the MostUsedWordScreenViewModel and MostUsedWordScreen presententation layer
Where I println("state --- >>> "+state.mostWordUsedItems) in MostUsedWordScreen, the state console shows as empty like this System.out: state --- >>> []
I tried to explain as detailed as I can, I hope you can understand.
A Flow doesn't do anything until you call a terminal operator on it. You called onEach, which is not a terminal operator. You should use collect. Or you can avoid the nesting inside a launch block by using onEach and launchIn, which does the same thing as launching a coroutine and calling collect() on the flow. You don't need to specify Dispatchers.IO here because nothing in your Flow is blocking. You correctly wrapped the blocking call in withContext(Dispatchers.IO), and the warning is a false positive. That's a well-known bug in their compiler inspection.
searchJob = getWordsAndMeaningsOnTheInternetUseCase().onEach { result ->
when (result) {
is Resource.Success -> {
_state.value = state.value.copy(
mostWordUsedItems = result.data ?: mutableListOf(),
isLoading = false
)
}
is Resource.Error -> {
_state.value = state.value.copy(
mostWordUsedItems = result.data ?: mutableListOf(),
isLoading = false
)
}
is Resource.Loading -> {
_state.value = state.value.copy(
mostWordUsedItems = result.data ?: mutableListOf(),
isLoading = true
)
}
}
}.launchIn(viewModelScope)
By the way, you need to move your emit(Success...) inside your try block. The way it is now, when there is an error, the error will immediately get replaced by a Success with empty list.
Side note, I recommend avoiding passing MutableLists around between classes. You have no need for them and it's a code smell. Sharing mutable state between classes is error-prone. I don't think there is any justification for using a Flow<MutableList> instead of a Flow<List>.
You rarely even need a MutableList locally in a function. For example, you could have done in your try block:
val listData = List(eventsSize - 1) {
val row = rows[it + 1]
val cols = row.select("td")
val word = cols[0].text()
val meaning = cols[1].text()
ExtractedData(i,word,meaning)
}
emit(Resource.Success(listData))
I have a model called RepNet I want to run on TFlite for Kotlin, the interpreter provides the shape and DataType of the data, but I simply could not get the data to work with the interpreter, I have problems getting it to the correct shape.
The data shape is this :
But I simply can't get my list of Images to match the correct shape, I'll include my code down below if someone could help me make the right transformations to get it working and thank you.
class TestActivity2 : AppCompatActivity() {
#RequiresApi(Build.VERSION_CODES.P)
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_test2)
//val file = File("/assets/repnet.tflite")
//Log.d("Path", file.path)
var file = loadModelFile(assets,"repnet2.5.tflite")
var interpreter = Interpreter(file!!)
var counts = getCount(interpreter)
interpreter.close()
Log.d("Counts", counts.toString())
}
#RequiresApi(Build.VERSION_CODES.P)
private fun getImages(): MutableList<TensorImage> {
val mmd = MediaMetadataRetriever()
val path = "/sdcard/bicycle.mp4"
mmd.setDataSource(path)
var duration = mmd.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_FRAME_COUNT)
var inputImages = mutableListOf<TensorImage>()
Log.d("Duration",duration.toString())
if (duration != null) {
for (i in 0 until 50) {
var bitmap: Bitmap?
Log.d("Frame", i.toString())
try {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
bitmap = mmd.getFrameAtIndex(i)
if (bitmap != null) {
bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true)
inputImages.add(TensorImage.fromBitmap(bitmap))
}
}
} catch (e: Exception) {
println("Could not convert image to BitMap")
e.printStackTrace()
}
}
}
return inputImages
}
fun preprocessImages(images: List<TensorImage>): List<TensorImage> {
val imageMean = 127.5F
val imageStd = 127.5F
val imageSize = 224
val imageProcessor = ImageProcessor.Builder()
.add(CastOp(DataType.FLOAT32))
.add(NormalizeOp(imageMean,imageStd))
.add(ResizeOp(imageSize,imageSize,ResizeOp.ResizeMethod.BILINEAR))
.build()
val preprocessedImages = mutableListOf<TensorImage>()
for (image in images) {
val processedImage = imageProcessor.process(image)
preprocessedImages.add(processedImage)
}
return preprocessedImages
}
#RequiresApi(Build.VERSION_CODES.P)
fun getCount(interpreter: Interpreter): Int {
var images = getImages()
images = preprocessImages(images as List<TensorImage>).toMutableList()
val batchImages = mutableListOf<TensorBuffer>()
for(img in images) {
batchImages.add(img.tensorBuffer)
}
var inputBuffer = TensorBuffer.createDynamic(DataType.FLOAT32)
var outputBuffer = TensorBuffer.createFixedSize(interpreter.getOutputTensor(0).shape(),interpreter.getOutputTensor(0).dataType())
interpreter.run(images[0].tensorBuffer,outputBuffer.buffer)
Log.d("Result", outputBuffer.floatArray[0].toString())
Log.d("Output", outputBuffer.toString())
return 0
}
#Throws(IOException::class)
private fun loadModelFile(assets: AssetManager, modelFilename: String): MappedByteBuffer? {
val fileDescriptor = assets.openFd(modelFilename)
val inputStream = FileInputStream(fileDescriptor.fileDescriptor)
val fileChannel: FileChannel = inputStream.getChannel()
val startOffset = fileDescriptor.startOffset
val declaredLength = fileDescriptor.declaredLength
return fileChannel.map(FileChannel.MapMode.READ_ONLY, startOffset, declaredLength)
}
}
I am new to kotlin and coroutines.I have been working on a client-server part of an android app.I am using mediasoup-client-android library for this.
I am trying to intialize the sendtransports using createSendTransport() method.This method does have a sendTransportListener which has abstract methods.One of them being is onProduce() which returns a producerId which is a String. awaitEmit() is an asynchronous action and I need this in onProduce().To use awaitEmit() I used coroutines.But I need String as return type instead of Deferred.Is there any other way to implement the mentioned logic? Below is my code
class RoomClient {
suspend fun initTransports(device: Device) {
coroutineScope {
val id: String?
val iceParameters: String?
val iceCandidates: String?
val dtlsParameters: String?
val sctpParameters: String?
try {
val params = JSONObject()
params.put("forceTcp",false)
params.put("rtpCapabilities", this#RoomClient.device?.rtpCapabilities)
val res = socket?.awaitEmit("createWebRtcTransport",params)
val data = res?.get(0) as JSONObject
if (data.has("error")) {
Log.d(TAG, data.getString("error"))
return#coroutineScope
}
id = data.optString("id")
iceParameters = data.optString("iceParameters")
iceCandidates = data.optString("iceCandidates")
dtlsParameters = data.optString("dtlsParameters")
sctpParameters = data.optString("sctpParameters")
} catch (e: Throwable) {
Log.e(TAG, "${e.message}")
return#coroutineScope
}
val sendTransportListener: SendTransport.Listener = object : SendTransport.Listener {
private val listenerTAG = TAG.toString() + "_ProducerTrans"
override fun onProduce(
transport: Transport,
kind: String?,
rtpParameters: String?,
appData: String?
): String? {
this#coroutineScope.async{
var producerId: String? = null
Log.d(listenerTAG, "onProduce() ")
val producerDeferred = launch {
val params = JSONObject("""{"producerTransportId": transport.id, "kind": kind, "rtpParameters": rtpParameters,"appData": appData}""")
val res = socket?.awaitEmit("produce",params)
val data = res?.get(0) as JSONObject
producerId = data.getString("producer_Id")
}
producerDeferred.join()
Log.d(listenerTAG, "producerId inside the coroutine: $producerId"
}
return#async producerId
}
}
this#RoomClient.producerTransport = device.createSendTransport(
sendTransportListener, id,
iceParameters,
iceCandidates,
dtlsParameters
)
}
}
}
And also I am not sure about the way coroutines are used here.Please correct me If I have missed something central.
I am uploading the file using Kotlin workmanager. In CoroutineWorkmanager, I do file upload with a suspend upload function. I want to observe retrofit progress and show it on ui. I can see the retrofit progress state but I cannot observe it in workManager.
My request body class where I can see the retrofit progress state :
class ProgressRequestBody : RequestBody {
val mFile: File
val ignoreFirstNumberOfWriteToCalls : Int
constructor(mFile: File) : super(){
this.mFile = mFile
ignoreFirstNumberOfWriteToCalls = 0
}
constructor(mFile: File, ignoreFirstNumberOfWriteToCalls : Int) : super(){
this.mFile = mFile
this.ignoreFirstNumberOfWriteToCalls = ignoreFirstNumberOfWriteToCalls
}
var numWriteToCalls = 0
private val _shared = MutableStateFlow<Float>(0F)
val shared : StateFlow<Float> = _shared
override fun contentType(): MediaType? {
return "image/*".toMediaTypeOrNull()
}
#Throws(IOException::class)
override fun contentLength(): Long {
return mFile.length()
}
#Throws(IOException::class)
override fun writeTo(sink: BufferedSink) {
numWriteToCalls++
val fileLength = mFile.length()
val buffer = ByteArray(DEFAULT_BUFFER_SIZE)
val `in` = FileInputStream(mFile)
var uploaded: Long = 0
try {
var read: Int
var lastProgressPercentUpdate = 0.0f
read = `in`.read(buffer)
while (read != -1) {
uploaded += read.toLong()
sink.write(buffer, 0, read)
read = `in`.read(buffer)
if (numWriteToCalls > ignoreFirstNumberOfWriteToCalls ) {
val progress = (uploaded.toFloat() / fileLength.toFloat()) * 100f
if (progress - lastProgressPercentUpdate > 1 || progress == 100f) {
_shared.value = progress
Log.d("progress", "${shared.value}")
lastProgressPercentUpdate = progress
}
}
}
} finally {
`in`.close()
}
}
companion object {
private val DEFAULT_BUFFER_SIZE = 2048
}
}
The worker I uploaded the file to:
class UploadWorker #WorkerInject constructor(
private val repository: Repository,
#Assisted context: Context,
#Assisted params: WorkerParameters
): CoroutineWorker(context, params) {
private lateinit var result: UploadResult
#ObsoleteCoroutinesApi
#OptIn(ExperimentalCoroutinesApi::class)
#SuppressLint("RestrictedApi")
override suspend fun doWork(): Result {
return try{
val requestBody = ProgressRequestBody(File(fileUri!!.toUri().path))
val multipartBody = prepareBody(fileUri!!.toUri(), photoPart)
progressState(requestBody)
upload(multipartBody)
Result.Success()
}catch(e :Exception){
Result.failure()
}
}
private fun prepareBody( ): MultipartBody.Part {
return MultipartBody.Part.createFormData("photo", "photo", "image/*")
}
suspend fun upload(
multipartBody: MultipartBody.Part,
) {
repository.uploadPhotos(
multipartBody
).collect{ result ->
if (result is Result.Success) {
this.result = result.data
}
}
}
private suspend fun progressState(photoPart: ProgressRequestBody) {
coroutineScope {
launch {
photoPart.shared.collect{
setProgress(workDataOf(PROGRESS to it))
}
}
}
}
}
While this way I can't run the worker. I am getting the following error from the worker:
java.util.concurrent.CancellationException: Task was cancelled.
at androidx.work.impl.utils.futures.AbstractFuture.cancellationExceptionWithCause(AbstractFuture.java:1184)
at androidx.work.impl.utils.futures.AbstractFuture.getDoneValue(AbstractFuture.java:514)
I have recently developed android app using Kotlin but I am getting the following error
Cannot infer a type for this parameter. Please specify it explicitly
below screenshot of the error
below my class where I am getting error
class AddBookingActivity : AppCompatActivity() {
#BindView(R.id.attendees_recycler_view)
internal var mAttendeeRecyclerView: RecyclerView? = null
#BindView(R.id.start_time_edit_text)
internal var mStartTime: EditText? = null
#BindView(R.id.end_time_edit_text)
internal var mEndTime: EditText? = null
private var mAttendeeName: EditText? = null
private var mAttendeeEmail: EditText? = null
private var mAttendeePhoneNumber: EditText? = null
private var mAttendeeAdapter: AttendeeAdapter? = null
private var mAlertDialog: AlertDialog? = null
private val mAttendeeItemList = ArrayList<AttendeeItem>()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_add_booking)
ButterKnife.bind(this)
mAttendeeRecyclerView!!.layoutManager = LinearLayoutManager(this)
mAttendeeAdapter = AttendeeAdapter(this)
mAttendeeAdapter!!.setAttendeeList(mAttendeeItemList)
mAttendeeRecyclerView!!.adapter = mAttendeeAdapter
}
#OnClick(R.id.toolbar_back_button)
internal fun onBackButtonClicked() {
onBackPressed()
}
#OnClick(R.id.start_time_edit_text)
internal fun onStartTimeClicked() {
showTimePickerDialog(mStartTime)
}
#OnClick(R.id.end_time_edit_text)
internal fun onEndTimeClicked() {
showTimePickerDialog(mEndTime)
}
#OnClick(R.id.fab_add_attendee)
internal fun onAddAttendeeClicked() {
val inflater = this.layoutInflater
val dialogView = inflater.inflate(R.layout.add_attendee_view, null)
mAttendeeName = dialogView.findViewById(R.id.attendee_name)
mAttendeeEmail = dialogView.findViewById(R.id.attendee_email)
mAttendeePhoneNumber = dialogView.findViewById(R.id.attendee_phone_number)
mAlertDialog = AlertDialog.Builder(this, R.style.AlertDialog)
.setTitle("Input attendee details")
.setPositiveButton("Add") { dialog, which ->
val item = AttendeeItem()
item.name = mAttendeeName!!.text.toString()
item.email = mAttendeeEmail!!.text.toString()
item.phoneNumber = mAttendeePhoneNumber!!.text.toString()
mAttendeeItemList.add(item)
mAttendeeAdapter!!.setAttendeeList(mAttendeeItemList)
mAttendeeAdapter!!.notifyItemInserted(mAttendeeItemList.size)
}
.setNegativeButton("Cancel", null)
.setView(dialogView).create()
mAlertDialog!!.show()
}
private fun showTimePickerDialog(editText: EditText?) {
val myCalender = Calendar.getInstance()
val hour = myCalender.get(Calendar.HOUR_OF_DAY)
val minute = myCalender.get(Calendar.MINUTE)
#SuppressLint("DefaultLocale")
val myTimeListener = { view, hourOfDay, minute1 ->
if (view.isShown()) {
myCalender.set(Calendar.HOUR_OF_DAY, hourOfDay)
myCalender.set(Calendar.MINUTE, minute1)
editText!!.setText(String.format(String.format("%s:%s", hourOfDay.toString(), minute1.toString())))
}
}
val timePickerDialog = TimePickerDialog(this, android.R.style.Theme_Holo_Light_Dialog_NoActionBar, myTimeListener, hour, minute, true)
timePickerDialog.setTitle("Choose hour:")
timePickerDialog.window!!.setBackgroundDrawableResource(android.R.color.transparent)
timePickerDialog.show()
}
}
You have to specify the interface to help Kotlin compiler:
#SuppressLint("DefaultLocale")
val myTimeListener = TimePickerDialog.OnTimeSetListener { view, hourOfDay, minute1 ->
if (view.isShown()) {
myCalender.set(Calendar.HOUR_OF_DAY, hourOfDay)
myCalender.set(Calendar.MINUTE, minute1)
editText!!.setText(String.format(String.format("%s:%s", hourOfDay.toString(), minute1.toString())))
}
}