added timeout and other error handling

app/build.gradle

@@ -11,8 +11,8 @@ android {
         applicationId "com.nareshkumarrao.eiweblog"
         minSdkVersion 16
         targetSdkVersion 30
-        versionCode 5
-        versionName "0.10.1"
+        versionCode 6
+        versionName "0.10.2"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }

app/release/output-metadata.json

@@ -10,8 +10,8 @@
     {
       "type": "SINGLE",
       "filters": [],
-      "versionCode": 5,
-      "versionName": "0.10.1",
+      "versionCode": 6,
+      "versionName": "0.10.2",
       "outputFile": "app-release.apk"
     }
   ]

app/src/main/java/com/nareshkumarrao/eiweblog/HISUtility.kt

@@ -1,17 +1,20 @@
 package com.nareshkumarrao.eiweblog
 
+import android.app.Activity
 import android.app.NotificationChannel
 import android.app.NotificationManager
 import android.app.PendingIntent
 import android.content.Context
 import android.content.Intent
 import android.os.Build
+import android.widget.Toast
 import androidx.core.app.NotificationCompat
 import androidx.core.app.NotificationManagerCompat
 import com.google.gson.Gson
 import com.google.gson.reflect.TypeToken
 import org.jsoup.Connection
 import org.jsoup.Jsoup
+import java.net.SocketTimeoutException
 
 data class ExamRow(val name: String, val grade: String, val attempt: String, val date: String)
 
@@ -77,6 +80,8 @@ internal object HISUtility {
                 ?: return null
 
         val runnable = Runnable {
+
+            try {
                 val postData: MutableMap<String, String> = mutableMapOf()
                 postData["asdf"] = username
                 postData["fdsa"] = password
@@ -85,14 +90,19 @@ internal object HISUtility {
                     .method(Connection.Method.POST)
                     .userAgent("Mozilla")
                     .data(postData)
+                    .timeout(60000)
                     .execute()
 
-            val selectNotenspiegel = Jsoup.connect(context.getString(R.string.ossc_select_noten))
+                val selectNotenspiegel =
+                    Jsoup.connect(context.getString(R.string.ossc_select_noten))
                         .userAgent("Mozilla")
                         .cookies(loginPage.cookies())
+                        .timeout(60000)
                         .get()
 
-            val notenspiegelURL = selectNotenspiegel.select("a[href]:containsOwn(Notenspiegel)").first()?.attr("href")
+                val notenspiegelURL =
+                    selectNotenspiegel.select("a[href]:containsOwn(Notenspiegel)").first()
+                        ?.attr("href")
                         ?: kotlin.run {
                             callback(null)
                             return@Runnable
@@ -101,22 +111,30 @@ internal object HISUtility {
                 val selectStudiengangUnhide = Jsoup.connect(notenspiegelURL)
                     .userAgent("Mozilla")
                     .cookies(loginPage.cookies())
+                    .timeout(60000)
                     .get()
-            val selectStudiengangUnhideURL = selectStudiengangUnhide.select("a[href]:containsOwn(Abschluss)").first().attr("href")
+                val selectStudiengangUnhideURL =
+                    selectStudiengangUnhide.select("a[href]:containsOwn(Abschluss)").first()
+                        .attr("href")
 
                 val selectStudiengang = Jsoup.connect(selectStudiengangUnhideURL)
                     .userAgent("Mozilla")
                     .cookies(loginPage.cookies())
+                    .timeout(60000)
                     .get()
-            val studiengangURL = selectStudiengang.select("a[href]:containsOwn(Leistungen anzeigen)").first().attr("href")
+                val studiengangURL =
+                    selectStudiengang.select("a[href]:containsOwn(Leistungen anzeigen)").first()
+                        .attr("href")
 
 
                 val notenSpiegelPage = Jsoup.connect(studiengangURL)
                     .userAgent("Mozilla")
                     .cookies(loginPage.cookies())
+                    .timeout(60000)
                     .get()
 
-            val allGradesRows = notenSpiegelPage.select("div.fixedContainer > table > tbody > tr")
+                val allGradesRows =
+                    notenSpiegelPage.select("div.fixedContainer > table > tbody > tr")
                 val examRows: MutableList<ExamRow> = mutableListOf()
                 for (row in allGradesRows) {
                     if (row.select("td.tabelle1_alignleft").size < 1) {
@@ -126,26 +144,54 @@ internal object HISUtility {
                     if (columns.size < 1) {
                         continue
                     }
-                val examRow = ExamRow(columns[1].text(), columns[3].text(), columns[6].text(), columns[7].text())
+                    val examRow = ExamRow(
+                        columns[1].text(),
+                        columns[3].text(),
+                        columns[6].text(),
+                        columns[7].text()
+                    )
                     examRows.add(examRow)
                 }
                 saveExamRows(context, examRows)
                 callback(examRows)
+            } catch (e: Exception) {
+                if (context is Activity) context.runOnUiThread {
+                    when (e) {
+                        is SocketTimeoutException -> {
+                            Toast.makeText(
+                                context,
+                                context.getString(R.string.ossc_timeout_message),
+                                Toast.LENGTH_LONG
+                            ).show()
+                        }
+                        else -> {
+                            Toast.makeText(context, e.localizedMessage, Toast.LENGTH_LONG).show()
+                        }
+                    }
+                    context.finish()
+                }
+            }
         }
 
         return Thread(runnable).start()
     }
-    fun sendNotification(context: Context?, examRow: ExamRow, id:Int) {
+
+    fun sendNotification(context: Context?, examRow: ExamRow, id: Int) {
         val intent = Intent(context, NotificationSettingsActivity::class.java).apply {
             flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
         }
         val pendingIntent: PendingIntent = PendingIntent.getActivity(context, 0, intent, 0)
 
-        val builder = NotificationCompat.Builder(context!!, context.getString(R.string.grades_notification_channel_id))
+        val builder = NotificationCompat.Builder(
+            context!!,
+            context.getString(R.string.grades_notification_channel_id)
+        )
             .setSmallIcon(R.drawable.ic_stat_name)
             .setContentTitle(context.getString(R.string.exam_results_notification))
-                .setStyle(NotificationCompat.BigTextStyle()
-                        .bigText("${examRow.name}: ${examRow.grade}"))
+            .setStyle(
+                NotificationCompat.BigTextStyle()
+                    .bigText("${examRow.name}: ${examRow.grade}")
+            )
                 .setContentIntent(pendingIntent)
                 .setPriority(NotificationCompat.PRIORITY_DEFAULT)
                 .setAutoCancel(true)
@@ -155,15 +201,21 @@ internal object HISUtility {
 
     }
 
-    fun createNotificationChannel(context: Context?){
+    fun createNotificationChannel(context: Context?) {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
             val name = context?.getString(R.string.grades_notification_channel_name)
-            val descriptionText = context?.getString(R.string.grades_notification_channel_description)
+            val descriptionText =
+                context?.getString(R.string.grades_notification_channel_description)
             val importance = NotificationManager.IMPORTANCE_DEFAULT
-            val channel = NotificationChannel(context?.getString(R.string.grades_notification_channel_id), name, importance).apply {
+            val channel = NotificationChannel(
+                context?.getString(R.string.grades_notification_channel_id),
+                name,
+                importance
+            ).apply {
                 description = descriptionText
             }
-            val notificationManager: NotificationManager = context?.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+            val notificationManager: NotificationManager =
+                context?.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
             notificationManager.createNotificationChannel(channel)
         }
     }

app/src/main/java/com/nareshkumarrao/eiweblog/UpdateWorker.kt

@@ -16,11 +16,13 @@ class UpdateWorker(private val context: Context, workerParams: WorkerParameters)
 
         if(weblogNotificationsEnabled!!){
             Utilities.weblogList(context) { articles ->
+                articles ?: return@weblogList
                 val lastArticle = Utilities.getLatestRelevantArticle(articles)!!
                 val hashString = lastArticle.title + lastArticle.content + lastArticle.date
                 val oldHash = md5(hashString)
 
                 Utilities.fetchWeblogXML(applicationContext){newArticles ->
+                    newArticles ?: return@fetchWeblogXML
                     val lastNewArticle = Utilities.getLatestRelevantArticle(newArticles)!!
                     val newHashString = lastNewArticle.title + lastNewArticle.content + lastNewArticle.date
                     val newHash = md5(newHashString)

app/src/main/java/com/nareshkumarrao/eiweblog/Utilities.kt

@@ -22,22 +22,22 @@ import java.io.StringReader
 
 internal object Utilities {
 
-    fun weblogList(context: Context?, function: (d: List<Article>) -> Unit){
+    fun weblogList(context: Context?, function: (d: List<Article>?) -> Unit) {
         val sharedPref = context?.getSharedPreferences(context.getString(R.string.preference_file_key), Context.MODE_PRIVATE)
         val weblogResponse = sharedPref?.getString(context.getString(R.string.weblog_response_key), null)
-        if (weblogResponse == null){
+        if (weblogResponse == null) {
             fetchWeblogXML(context, function)
             return
         }
 
         val parser: XmlPullParser = Xml.newPullParser()
         parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false)
-        parser.setInput(  StringReader(weblogResponse) )
+        parser.setInput(StringReader(weblogResponse))
         parser.nextTag()
         function(parseXML(parser))
     }
 
-    fun fetchWeblogXML(context: Context?, function: (d: List<Article>) -> Unit) {
+    fun fetchWeblogXML(context: Context?, callback: (d: List<Article>?) -> Unit) {
 
         val queue = Volley.newRequestQueue(context)
 
@@ -49,7 +49,7 @@ internal object Utilities {
 
                     val sharedPref = context?.getSharedPreferences(context.getString(R.string.preference_file_key), Context.MODE_PRIVATE)
                     if (sharedPref != null) {
-                        with (sharedPref.edit()) {
+                        with(sharedPref.edit()) {
                             putString(context.getString(R.string.weblog_response_key), responseStr)
                             apply()
                         }
@@ -58,14 +58,17 @@ internal object Utilities {
                     val parser: XmlPullParser = Xml.newPullParser()
                     parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false)
                     //Log.d("XMLLIST", responseStr )
-                    parser.setInput(  StringReader(responseStr) )
+                    parser.setInput(StringReader(responseStr))
                     parser.nextTag()
 
                     val articles = parseXML(parser)
-                    function(articles)
+                    callback(articles)
 
                 },
-                { error -> Log.e("XMLLIST", error.toString()) })
+                { error ->
+                    Log.e("XMLLIST", error.toString())
+                    callback(null)
+                })
 
         queue.add(stringRequest)
     }

app/src/main/java/com/nareshkumarrao/eiweblog/ui/main/SectionsFragment.kt

@@ -4,6 +4,7 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.Toast
 import androidx.fragment.app.Fragment
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
@@ -48,12 +49,18 @@ class SectionsFragment : Fragment() {
         }
     }
 
-    private fun updateView(get_articles: List<Article>){
-        this.swipeRefreshLayout?.isRefreshing=false
+    private fun updateView(get_articles: List<Article>?) {
+        this.swipeRefreshLayout?.isRefreshing = false
+
+        if (get_articles == null) {
+            Toast.makeText(context, getString(R.string.load_weblog_error_message), Toast.LENGTH_LONG).show()
+            return
+        }
+
         val articles: MutableList<Article> = mutableListOf()
         val title = arguments?.getString(ARG_SECTION_NAME) ?: return
-        for (article in get_articles){
-            if(article.category == title){
+        for (article in get_articles) {
+            if (article.category == title) {
                 articles.add(article)
             }
         }

app/src/main/res/layout/dialog_login.xml

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:orientation="vertical">

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

@@ -32,4 +32,6 @@
     <string name="enable_grades_notifications_text">Benachrichtige mich bei neuem Klausurergebnis</string>
     <string name="login_dialog_title">Anmelden bei OSSC</string>
     <string name="error">FEHLER!</string>
+    <string name="ossc_timeout_message">Timeout-Fehler bei OSSC. Versuch mal später.</string>
+    <string name="load_weblog_error_message">Weblog kann nicht aktualisiert werden. Versuch mal später.</string>
 </resources>

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

@@ -33,4 +33,6 @@
     <string name="enable_grades_notifications_text">Notify me when I get new grades</string>
     <string name="login_dialog_title">Login to OSSC</string>
     <string name="error">ERROR!</string>
+    <string name="ossc_timeout_message">OSSC has timed out. Try again later.</string>
+    <string name="load_weblog_error_message">Could not load new weblog data. Try again later.</string>
 </resources>

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

@@ -54,4 +54,6 @@
     <string name="enable_grades_notifications_key" translatable="false">com.nareshkumarrao.eiweblog.grades_notifications.key</string>
     <string name="login_dialog_title">Login to OSSC</string>
     <string name="error">ERROR!</string>
+    <string name="ossc_timeout_message">OSSC has timed out. Try again later.</string>
+    <string name="load_weblog_error_message">Could not load new weblog data. Try again later.</string>
 </resources>

images/launcher.svg

@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!--suppress ALL -->
 <svg
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:cc="http://creativecommons.org/ns#"