Validate server URLs

app/src/main/java/io/heckel/ntfy/ui/SettingsActivity.kt

@@ -1,7 +1,6 @@
 package io.heckel.ntfy.ui
 
 import android.Manifest
-import android.annotation.SuppressLint
 import android.app.AlertDialog
 import android.content.ClipData
 import android.content.ClipboardManager
@@ -10,6 +9,7 @@ import android.content.pm.PackageManager
 import android.os.Build
 import android.os.Bundle
 import android.text.TextUtils
+import android.widget.Button
 import android.widget.Toast
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.annotation.Keep
@@ -297,6 +297,13 @@ class SettingsActivity : AppCompatActivity(), PreferenceFragmentCompat.OnPrefere
                     return repository.getDefaultBaseUrl()
                 }
             }
+            defaultBaseUrl?.setOnBindEditTextListener { editText ->
+                editText.addTextChangedListener(AfterChangedTextWatcher {
+                    val okayButton: Button = editText.rootView.findViewById(android.R.id.button1)
+                    val value = editText.text.toString()
+                    okayButton.isEnabled = value.isEmpty() || validUrl(value)
+                })
+            }
             defaultBaseUrl?.summaryProvider = Preference.SummaryProvider<EditTextPreference> { pref ->
                 if (TextUtils.isEmpty(pref.text)) {
                     getString(R.string.settings_general_default_base_url_default_summary, appBaseUrl)

app/src/main/java/io/heckel/ntfy/ui/UserFragment.kt

@@ -16,6 +16,7 @@ import androidx.fragment.app.DialogFragment
 import com.google.android.material.textfield.TextInputEditText
 import io.heckel.ntfy.R
 import io.heckel.ntfy.db.User
+import io.heckel.ntfy.util.validUrl
 
 class UserFragment : DialogFragment() {
     private var user: User? = null
@@ -167,7 +168,7 @@ class UserFragment : DialogFragment() {
         val username = usernameView.text?.toString() ?: ""
         val password = passwordView.text?.toString() ?: ""
         if (user == null) {
-            positiveButton.isEnabled = (baseUrl.startsWith("http://") || baseUrl.startsWith("https://"))
+            positiveButton.isEnabled = validUrl(baseUrl)
                     && !baseUrlsInUse.contains(baseUrl)
                     && username.isNotEmpty() && password.isNotEmpty()
         } else {

app/src/main/java/io/heckel/ntfy/util/Util.kt

@@ -71,7 +71,7 @@ fun validTopic(topic: String): Boolean {
 }
 
 fun validUrl(url: String): Boolean {
-    return "^https?://.+".toRegex().matches(url)
+    return "^https?://\\S+".toRegex().matches(url)
 }
 
 fun formatDateShort(timestampSecs: Long): String {

fastlane/metadata/android/en-US/changelog/26.txt

@@ -1,5 +1,8 @@
 Features:
 * Support for ntfy:// deep links (#20, thanks to @Copephobia for reporting)
 
+Bugs:
+* Validate URLs when changing default server and server in user management (#193, thanks to @StoyanDimitrov)
+
 Translations:
 * Japanese (thanks to @shak)