Request: add a TLS version preference

app/src/main/java/dev/lowrespalmtree/comet/PageFragment.kt

@@ -118,11 +118,13 @@ class PageFragment : Fragment(), PageAdapter.Listener {
         when (uri.scheme) {
             "gemini" -> {
                 val prefs = PreferenceManager.getDefaultSharedPreferences(requireContext())
+                val protocol =
+                    prefs.getString("tls_version", Request.DEFAULT_TLS_VERSION)!!
                 val connectionTimeout =
                     prefs.getInt("connection_timeout", Request.DEFAULT_CONNECTION_TIMEOUT_SEC)
                 val readTimeout =
                     prefs.getInt("read_timeout", Request.DEFAULT_READ_TIMEOUT_SEC)
-                vm.sendGeminiRequest(uri, connectionTimeout, readTimeout)
+                vm.sendGeminiRequest(uri, protocol, connectionTimeout, readTimeout)
             }
             else -> openUnknownScheme(uri)
         }

app/src/main/java/dev/lowrespalmtree/comet/PageViewModel.kt

@@ -52,7 +52,7 @@ class PageViewModel(@Suppress("unused") private val savedStateHandle: SavedState
      * The URI must be valid, absolute and with a gemini scheme.
      */
     @ExperimentalCoroutinesApi
-    fun sendGeminiRequest(uri: Uri, connectionTimeout: Int, readTimeout: Int, redirects: Int = 0) {
+    fun sendGeminiRequest(uri: Uri, protocol: String, connectionTimeout: Int, readTimeout: Int, redirects: Int = 0) {
         Log.d(TAG, "sendRequest: URI \"$uri\"")
         loadingUrl = uri
         state.postValue(State.CONNECTING)
@@ -60,7 +60,7 @@ class PageViewModel(@Suppress("unused") private val savedStateHandle: SavedState
         requestJob = viewModelScope.launch(Dispatchers.IO) {
             val response = try {
                 val request = Request(uri)
-                val socket = request.connect(connectionTimeout, readTimeout)
+                val socket = request.connect(protocol, connectionTimeout, readTimeout)
                 val channel = request.proceed(socket, this)
                 Response.from(channel, viewModelScope)
             } catch (e: Exception) {
@@ -71,7 +71,7 @@ class PageViewModel(@Suppress("unused") private val savedStateHandle: SavedState
                 signalError(
                     when (e) {
                         is UnknownHostException -> "Unknown host \"${uri.authority}\"."
-                        is ConnectException -> "Can't connect to this server: ${e.localizedMessage}."
+                        is ConnectException -> "Can't connect to this server: ${e.message}."
                         is SocketTimeoutException -> "Connection timed out."
                         is CancellationException -> "Connection cancelled: ${e.message}."
                         else -> "Oops, something failed!"

app/src/main/java/dev/lowrespalmtree/comet/Request.kt

@@ -17,9 +17,9 @@ import javax.net.ssl.X509TrustManager
 class Request(private val uri: Uri) {
     private val port get() = if (uri.port > 0) uri.port else 1965
 
-    fun connect(connectionTimeout: Int, readTimeout: Int): SSLSocket {
-        Log.d(TAG, "connect")
-        val context = SSLContext.getInstance("TLSv1.2")
+    fun connect(protocol: String, connectionTimeout: Int, readTimeout: Int): SSLSocket {
+        Log.d(TAG, "connect: $protocol, c.to. $connectionTimeout, r.to. $readTimeout")
+        val context = SSLContext.getInstance(protocol)
         context.init(null, arrayOf(TrustManager()), null)
         val socket = context.socketFactory.createSocket() as SSLSocket
         socket.soTimeout = readTimeout * 1000
@@ -70,6 +70,7 @@ class Request(private val uri: Uri) {
 
     companion object {
         private const val TAG = "Request"
+        const val DEFAULT_TLS_VERSION = "TLSv1.3"
         const val DEFAULT_CONNECTION_TIMEOUT_SEC = 10
         const val DEFAULT_READ_TIMEOUT_SEC = 10
     }

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

@@ -1,12 +1,11 @@
 <resources>
-    <!-- Reply Preference -->
-    <string-array name="reply_entries">
-        <item>Reply</item>
-        <item>Reply to all</item>
+    <string-array name="tls_version_entries">
+        <item>TLS v1.3</item>
+        <item>TLS v1.2</item>
     </string-array>
 
-    <string-array name="reply_values">
-        <item>reply</item>
-        <item>reply_all</item>
+    <string-array name="tls_version_values">
+        <item>TLSv1.3</item>
+        <item>TLSv1.2</item>
     </string-array>
 </resources>

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

@@ -46,5 +46,6 @@
     <string name="edit">Edit</string>
     <string name="identity_usages">Active URL path</string>
     <string name="input_common_name">Enter a name to use as the certificate\'s subject common name. This can be left empty.</string>
+    <string name="tls_version">TLS version</string>
 
 </resources>

app/src/main/res/xml/root_preferences.xml

@@ -13,18 +13,18 @@
             app:key="home_set"
             app:title="@string/pref_home_set" />
 
-        <ListPreference
-            app:defaultValue="reply"
-            app:entries="@array/reply_entries"
-            app:entryValues="@array/reply_values"
-            app:key="reply"
-            app:title="@string/reply_title"
-            app:useSimpleSummaryProvider="true" />
-
     </PreferenceCategory>
 
     <PreferenceCategory app:title="@string/pref_protocol_header">
 
+        <DropDownPreference
+            app:key="tls_version"
+            app:entries="@array/tls_version_entries"
+            app:entryValues="@array/tls_version_values"
+            app:defaultValue="TLSv1.3"
+            app:useSimpleSummaryProvider="true"
+            app:title="@string/tls_version" />
+
         <SeekBarPreference
             android:defaultValue="10"
             android:max="60"