Updated Subsonic API version handling

2020-08-27 10:27:25 +02:00 · 2020-08-27 10:27:25 +02:00 · ca2bfbf14b
parent 0edaa29303
commit ca2bfbf14b
20 changed files with 221 additions and 146 deletions
--- a/core/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicAPIClientTest.kt
+++ b/core/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicAPIClientTest.kt
@ -14,7 +14,7 @@ abstract class SubsonicAPIClientTest {
    protected lateinit var client: SubsonicAPIClient

    @Before
-    fun setUp() {
+    open fun setUp() {
        config = SubsonicClientConfiguration(
            mockWebServerRule.mockWebServer.url("/").toString(),
            USERNAME,
--- a/core/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/VersionAwareJacksonConverterFactoryTest.kt
+++ b/core/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/VersionAwareJacksonConverterFactoryTest.kt
@ -0,0 +1,54 @@
+package org.moire.ultrasonic.api.subsonic
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import okhttp3.mockwebserver.MockResponse
+import org.amshove.kluent.`should be`
+import org.junit.Before
+import org.junit.Test
+
+/**
+ * Integration test for [VersionAwareJacksonConverterFactory].
+ */
+class VersionAwareJacksonConverterFactoryTest : SubsonicAPIClientTest()  {
+    private val initialProtocolVersion = SubsonicAPIVersions.V1_1_0
+    private var updatedProtocolVersion = SubsonicAPIVersions.V1_1_0
+
+    @Before
+    override fun setUp() {
+        config = SubsonicClientConfiguration(
+                mockWebServerRule.mockWebServer.url("/").toString(),
+                USERNAME,
+                PASSWORD,
+                initialProtocolVersion,
+                CLIENT_ID
+        )
+        client = SubsonicAPIClient(config)
+    }
+
+    @Test
+    fun `Should update version from response`() {
+        mockWebServerRule.enqueueResponse("ping_ok.json")
+
+        client.api.ping().execute()
+
+        client.protocolVersion.`should be`(SubsonicAPIVersions.V1_13_0)
+    }
+
+    @Test
+    fun `Should update version from response with utf-8 bom`() {
+        mockWebServerRule.enqueueResponse("ping_ok_utf8_bom.json")
+
+        client.api.ping().execute()
+
+        client.protocolVersion.`should be`(SubsonicAPIVersions.V1_16_0)
+    }
+
+    @Test
+    fun `Should not update version if response json doesn't contain version`() {
+        mockWebServerRule.enqueueResponse("non_subsonic_response.json")
+
+        client.api.stream("1234").execute()
+
+        client.protocolVersion.`should be`(initialProtocolVersion)
+    }
+}
--- a/core/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/interceptors/VersionInterceptorTest.kt
+++ b/core/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/interceptors/VersionInterceptorTest.kt
@ -14,12 +14,9 @@ import org.moire.ultrasonic.api.subsonic.enqueueResponse
 */
 class VersionInterceptorTest : BaseInterceptorTest() {
    private val initialProtocolVersion = SubsonicAPIVersions.V1_1_0
-    private var updatedProtocolVersion = SubsonicAPIVersions.V1_1_0

    override val interceptor: Interceptor by lazy(NONE) {
-        VersionInterceptor(initialProtocolVersion) {
-            updatedProtocolVersion = it
-        }
+        VersionInterceptor(initialProtocolVersion)
    }

    @Test
@ -33,55 +30,4 @@ class VersionInterceptorTest : BaseInterceptorTest() {

        requestLine `should contain` "v=${initialProtocolVersion.restApiVersion}"
    }
-
-    @Test
-    fun `Should update version from response`() {
-        mockWebServerRule.enqueueResponse("ping_ok.json")
-
-        client.newCall(createRequest {}).execute()
-
-        (interceptor as VersionInterceptor)
-            .protocolVersion `should equal` SubsonicAPIVersions.V1_13_0
-    }
-
-    @Test
-    fun `Should update version from response with utf-8 bom`() {
-        mockWebServerRule.enqueueResponse("ping_ok_utf8_bom.json")
-
-        client.newCall(createRequest {}).execute()
-
-        (interceptor as VersionInterceptor)
-            .protocolVersion `should equal` SubsonicAPIVersions.V1_16_0
-    }
-
-    @Test
-    fun `Should not update version if response json doesn't contain version`() {
-        mockWebServerRule.enqueueResponse("non_subsonic_response.json")
-
-        client.newCall(createRequest {}).execute()
-
-        (interceptor as VersionInterceptor).protocolVersion `should equal` initialProtocolVersion
-    }
-
-    @Test
-    fun `Should not update version on non-json response`() {
-        mockWebServerRule.mockWebServer.enqueue(
-            MockResponse()
-                .setBody("asdqwnekjnqwkjen")
-                .setHeader("Content-Type", "application/octet-stream")
-        )
-
-        client.newCall(createRequest {}).execute()
-
-        (interceptor as VersionInterceptor).protocolVersion `should equal` initialProtocolVersion
-    }
-
-    @Test
-    fun `Should notify notifier on version change`() {
-        mockWebServerRule.enqueueResponse("ping_ok.json")
-
-        client.newCall(createRequest {}).execute()
-
-        updatedProtocolVersion `should equal` SubsonicAPIVersions.V1_13_0
-    }
 }
--- a/core/subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/ApiNotSupportedException.kt
+++ b/core/subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/ApiNotSupportedException.kt
@ -6,6 +6,11 @@ import java.io.IOException
 * Special [IOException] to indicate that called api is not yet supported
 * by current server api version.
 */
-class ApiNotSupportedException(
-    serverApiVersion: SubsonicAPIVersions
-) : IOException("Server api $serverApiVersion does not support this call")
+class ApiNotSupportedException : IOException {
+    val serverApiVersion: String
+    constructor(
+        apiVersion: SubsonicAPIVersions
+    ) : super("Server api $apiVersion does not support this call") {
+        serverApiVersion = apiVersion.restApiVersion
+    }
+}
--- a/core/subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicAPIClient.kt
+++ b/core/subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicAPIClient.kt
@ -21,7 +21,6 @@ import org.moire.ultrasonic.api.subsonic.response.StreamResponse
 import org.moire.ultrasonic.api.subsonic.response.SubsonicResponse
 import retrofit2.Response
 import retrofit2.Retrofit
-import retrofit2.converter.jackson.JacksonConverterFactory

 private const val READ_TIMEOUT = 60_000L

@ -39,9 +38,7 @@ class SubsonicAPIClient(
    config: SubsonicClientConfiguration,
    baseOkClient: OkHttpClient = OkHttpClient.Builder().build()
 ) {
-    private val versionInterceptor = VersionInterceptor(config.minimalProtocolVersion) {
-        protocolVersion = it
-    }
+    private val versionInterceptor = VersionInterceptor(config.minimalProtocolVersion)

    private val proxyPasswordInterceptor = ProxyPasswordInterceptor(
        config.minimalProtocolVersion,
@ -58,6 +55,7 @@ class SubsonicAPIClient(
            field = value
            proxyPasswordInterceptor.apiVersion = field
            wrappedApi.currentApiVersion = field
+            versionInterceptor.protocolVersion = field
        }

    private val okHttpClient = baseOkClient.newBuilder()
@ -87,7 +85,12 @@ class SubsonicAPIClient(
    private val retrofit = Retrofit.Builder()
        .baseUrl("${config.baseUrl}/rest/")
        .client(okHttpClient)
-        .addConverterFactory(JacksonConverterFactory.create(jacksonMapper))
+        .addConverterFactory(
+            VersionAwareJacksonConverterFactory.create(
+                { protocolVersion = it },
+                jacksonMapper
+            )
+        )
        .build()

    private val wrappedApi = ApiVersionCheckWrapper(
--- a/core/subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicAPIVersions.kt
+++ b/core/subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicAPIVersions.kt
@ -5,6 +5,7 @@ import com.fasterxml.jackson.core.JsonParser
 import com.fasterxml.jackson.databind.DeserializationContext
 import com.fasterxml.jackson.databind.JsonDeserializer
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize
+import java.lang.NumberFormatException

 /**
 * Subsonic REST API versions.
@ -31,28 +32,45 @@ enum class SubsonicAPIVersions(val subsonicVersions: String, val restApiVersion:

    companion object {
        @JvmStatic @Throws(IllegalArgumentException::class)
-        fun fromApiVersion(apiVersion: String): SubsonicAPIVersions {
-            when (apiVersion) {
-                "1.1.0" -> return V1_1_0
-                "1.1.1" -> return V1_1_1
-                "1.2.0" -> return V1_2_0
-                "1.3.0" -> return V1_3_0
-                "1.4.0" -> return V1_4_0
-                "1.5.0" -> return V1_5_0
-                "1.6.0" -> return V1_6_0
-                "1.7.0" -> return V1_7_0
-                "1.8.0" -> return V1_8_0
-                "1.9.0" -> return V1_9_0
-                "1.10.2" -> return V1_10_2
-                "1.10.5" -> return V1_10_2 // Non standard version of Madsonic Server 5.1
-                "1.11.0" -> return V1_11_0
-                "1.12.0" -> return V1_12_0
-                "1.13.0" -> return V1_13_0
-                "1.14.0" -> return V1_14_0
-                "1.15.0" -> return V1_15_0
-                "1.16.0" -> return V1_16_0
-                "1.16.1" -> return V1_16_0 // Fast and dirty fix to Subsonic 6.1.4
-                else -> throw IllegalArgumentException("Unknown api version $apiVersion")
+        fun getClosestKnownClientApiVersion(apiVersion: String): SubsonicAPIVersions {
+            val versionComponents = apiVersion.split(".")
+            if (versionComponents.size < 2)
+                throw IllegalArgumentException("Unknown api version $apiVersion")
+
+            try {
+                val majorVersion = versionComponents[0].toInt()
+                val minorVersion = versionComponents[1].toInt()
+                val patchVersion = if (versionComponents.size > 2) versionComponents[2].toInt()
+                    else 0
+
+                when (majorVersion) {
+                    1 -> when {
+                        minorVersion < 1 ->
+                            throw IllegalArgumentException("Unknown api version $apiVersion")
+                        minorVersion < 2 && patchVersion < 1 -> return V1_1_0
+                        minorVersion < 2 -> return V1_1_1
+                        minorVersion < 3 -> return V1_2_0
+                        minorVersion < 4 -> return V1_3_0
+                        minorVersion < 5 -> return V1_4_0
+                        minorVersion < 6 -> return V1_5_0
+                        minorVersion < 7 -> return V1_6_0
+                        minorVersion < 8 -> return V1_7_0
+                        minorVersion < 9 -> return V1_8_0
+                        minorVersion < 10 -> return V1_9_0
+                        minorVersion < 11 -> return V1_10_2
+                        minorVersion < 12 -> return V1_11_0
+                        minorVersion < 13 -> return V1_12_0
+                        minorVersion < 14 -> return V1_13_0
+                        minorVersion < 15 -> return V1_14_0
+                        minorVersion < 16 -> return V1_15_0
+                        else -> return V1_16_0
+                    }
+                    // Subsonic API specifies that the client's and the server's major API version
+                    // must be the same
+                    else -> throw IllegalArgumentException("Unknown api version $apiVersion")
+                }
+            } catch (exception: NumberFormatException) {
+                throw IllegalArgumentException("Malformed api version $apiVersion")
            }
        }

@ -64,7 +82,7 @@ enum class SubsonicAPIVersions(val subsonicVersions: String, val restApiVersion:
                if (p.currentName != "version") {
                    throw JsonParseException(p, "Not valid token for API version!")
                }
-                return fromApiVersion(p.text)
+                return getClosestKnownClientApiVersion(p.text)
            }
        }
    }
--- a/core/subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/VersionAwareJacksonConverterFactory.kt
+++ b/core/subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/VersionAwareJacksonConverterFactory.kt
@ -0,0 +1,87 @@
+package org.moire.ultrasonic.api.subsonic
+
+import com.fasterxml.jackson.databind.JavaType
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.fasterxml.jackson.databind.ObjectReader
+import java.lang.reflect.Type
+import okhttp3.RequestBody
+import okhttp3.ResponseBody
+import org.moire.ultrasonic.api.subsonic.response.SubsonicResponse
+import retrofit2.Converter
+import retrofit2.Retrofit
+import retrofit2.converter.jackson.JacksonConverterFactory
+
+/**
+ * Retrofit Converter Factory which uses Jackson for conversion and maintains the
+ * version of the Subsonic API.
+ * @param notifier: callback function to call when the Subsonic API version changes
+ */
+class VersionAwareJacksonConverterFactory(
+    private val notifier: (SubsonicAPIVersions) -> Unit = {}
+) : Converter.Factory() {
+
+    constructor(
+        notifier: (SubsonicAPIVersions) -> Unit = {},
+        mapper: ObjectMapper
+    ) : this(notifier) {
+        this.mapper = mapper
+        jacksonConverterFactory = JacksonConverterFactory.create(mapper)
+    }
+
+    private var mapper: ObjectMapper? = null
+    private var jacksonConverterFactory: JacksonConverterFactory? = null
+
+    override fun responseBodyConverter(
+        type: Type,
+        annotations: Array<Annotation>,
+        retrofit: Retrofit
+    ): Converter<ResponseBody, *>? {
+        val javaType: JavaType = mapper!!.typeFactory.constructType(type)
+        val reader: ObjectReader? = mapper!!.readerFor(javaType)
+        return VersionAwareResponseBodyConverter<Any>(notifier, reader!!)
+    }
+
+    override fun requestBodyConverter(
+        type: Type,
+        parameterAnnotations: Array<Annotation>,
+        methodAnnotations: Array<Annotation>,
+        retrofit: Retrofit
+    ): Converter<*, RequestBody>? {
+        return jacksonConverterFactory?.requestBodyConverter(
+            type, parameterAnnotations, methodAnnotations, retrofit
+        )
+    }
+
+    companion object {
+        @JvmOverloads // Guarding public API nullability.
+        fun create(
+            notifier: (SubsonicAPIVersions) -> Unit = {},
+            mapper: ObjectMapper? = ObjectMapper()
+        ): VersionAwareJacksonConverterFactory {
+            if (mapper == null) throw NullPointerException("mapper == null")
+            return VersionAwareJacksonConverterFactory(notifier, mapper)
+        }
+    }
+
+    class VersionAwareResponseBodyConverter<T> (
+        private val notifier: (SubsonicAPIVersions) -> Unit = {},
+        private val adapter: ObjectReader
+    ) : Converter<ResponseBody, T> {
+        override fun convert(value: ResponseBody): T {
+            value.use {
+                // The response stream contains the version of the API for parsing the stream
+                // to an object. Currently the parsing is independent from the version as new
+                // versions only contain extra optional fields.
+                val response: T = adapter.readValue(value.charStream())
+                if (response is SubsonicResponse) {
+                    try {
+                        notifier(response.version)
+                    } catch (e: IllegalArgumentException) {
+                        // no-op
+                    }
+                }
+                return response
+            }
+        }
+    }
+}
--- a/core/subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/interceptors/VersionInterceptor.kt
+++ b/core/subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/interceptors/VersionInterceptor.kt
@ -1,29 +1,16 @@
 package org.moire.ultrasonic.api.subsonic.interceptors

-import com.fasterxml.jackson.core.JsonFactory
-import com.fasterxml.jackson.core.JsonParseException
-import com.fasterxml.jackson.core.JsonToken
-import java.io.IOException
 import okhttp3.Interceptor
 import okhttp3.Interceptor.Chain
-import okhttp3.Response
 import org.moire.ultrasonic.api.subsonic.SubsonicAPIVersions

-private const val DEFAULT_PEEK_BYTE_COUNT = 1000L
-
 /**
- * Special [Interceptor] that adds client supported version to request and tries to update it
- * from server response.
- *
- * Optionally [notifier] will be invoked on version change.
- *
+ * Special [Interceptor] that adds client supported version to request
 * @author Yahor Berdnikau
 */
 internal class VersionInterceptor(
-    internal var protocolVersion: SubsonicAPIVersions,
-    private val notifier: (SubsonicAPIVersions) -> Unit = {}
+    internal var protocolVersion: SubsonicAPIVersions
 ) : Interceptor {
-    private val jsonFactory = JsonFactory()

    override fun intercept(chain: Chain): okhttp3.Response {
        val originalRequest = chain.request()
@ -38,44 +25,6 @@ internal class VersionInterceptor(
            )
            .build()

-        val response = chain.proceed(newRequest)
-        if (response.isSuccessful) {
-            val isJson = response.body()?.contentType()?.subtype()?.equals("json", true) ?: false
-            if (isJson) {
-                tryUpdateProtocolVersion(response)
-            }
-        }
-
-        return response
-    }
-
-    private fun tryUpdateProtocolVersion(response: Response) {
-        val content = response.peekBody(DEFAULT_PEEK_BYTE_COUNT).byteStream()
-
-        try {
-            val jsonReader = jsonFactory.createParser(content)
-            jsonReader.nextToken()
-            if (jsonReader.currentToken == JsonToken.START_OBJECT) {
-                while (
-                    jsonReader.currentName != "version" &&
-                    jsonReader.currentToken != null
-                ) {
-                    jsonReader.nextToken()
-                }
-                val versionStr = jsonReader.nextTextValue()
-                if (versionStr != null) {
-                    try {
-                        protocolVersion = SubsonicAPIVersions.fromApiVersion(versionStr)
-                        notifier(protocolVersion)
-                    } catch (e: IllegalArgumentException) {
-                        // no-op
-                    }
-                }
-            }
-        } catch (io: IOException) {
-            // no-op
-        } catch (parse: JsonParseException) {
-            // no-op
-        }
+        return chain.proceed(newRequest)
    }
 }
--- a/core/subsonic-api/src/test/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicAPIVersionsTest.kt
+++ b/core/subsonic-api/src/test/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicAPIVersionsTest.kt
@ -18,11 +18,11 @@ class SubsonicAPIVersionsTest(private val apiVersion: SubsonicAPIVersions) {

    @Test
    fun `Should proper convert api version to enum`() {
-        SubsonicAPIVersions.fromApiVersion(apiVersion.restApiVersion) `should equal` apiVersion
+        SubsonicAPIVersions.getClosestKnownClientApiVersion(apiVersion.restApiVersion) `should equal` apiVersion
    }

    @Test(expected = IllegalArgumentException::class)
    fun `Should throw IllegalArgumentException for unknown api version`() {
-        SubsonicAPIVersions.fromApiVersion(apiVersion.restApiVersion.substring(0, 2))
+        SubsonicAPIVersions.getClosestKnownClientApiVersion(apiVersion.restApiVersion.substring(0, 2))
    }
 }
--- a/ultrasonic/src/main/java/org/moire/ultrasonic/util/BackgroundTask.java
+++ b/ultrasonic/src/main/java/org/moire/ultrasonic/util/BackgroundTask.java
@ -23,6 +23,7 @@ import android.os.Handler;
 import android.util.Log;
 import com.fasterxml.jackson.core.JsonParseException;
 import org.moire.ultrasonic.R;
+import org.moire.ultrasonic.api.subsonic.ApiNotSupportedException;
 import org.moire.ultrasonic.service.SubsonicRESTException;
 import org.moire.ultrasonic.subsonic.RestErrorMapper;

@ -86,7 +87,10 @@ public abstract class BackgroundTask<T> implements ProgressListener
            } else {
                return activity.getResources().getString(R.string.background_task_ssl_error);
            }
-        } else if (error instanceof IOException) {
+        } else if (error instanceof ApiNotSupportedException) {
+			return activity.getResources().getString(R.string.background_task_unsupported_api,
+				((ApiNotSupportedException) error).getServerApiVersion());
+		} else if (error instanceof IOException) {
            return activity.getResources().getString(R.string.background_task_network_error);
        } else if (error instanceof SubsonicRESTException) {
            return RestErrorMapper.getLocalizedErrorMessage((SubsonicRESTException) error, activity);
--- a/ultrasonic/src/main/kotlin/org/moire/ultrasonic/di/MusicServiceModule.kt
+++ b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/di/MusicServiceModule.kt
@ -78,7 +78,7 @@ val musicServiceModule = module(MUSIC_SERVICE_CONTEXT) {
                baseUrl = "http://localhost",
                username = "",
                password = "",
-                minimalProtocolVersion = SubsonicAPIVersions.fromApiVersion(
+                minimalProtocolVersion = SubsonicAPIVersions.getClosestKnownClientApiVersion(
                    Constants.REST_PROTOCOL_VERSION
                ),
                clientID = Constants.REST_CLIENT_ID,
@ -91,7 +91,7 @@ val musicServiceModule = module(MUSIC_SERVICE_CONTEXT) {
                baseUrl = serverUrl,
                username = username,
                password = password,
-                minimalProtocolVersion = SubsonicAPIVersions.fromApiVersion(
+                minimalProtocolVersion = SubsonicAPIVersions.getClosestKnownClientApiVersion(
                    Constants.REST_PROTOCOL_VERSION
                ),
                clientID = Constants.REST_CLIENT_ID,
--- a/ultrasonic/src/main/res/values-de/strings.xml
+++ b/ultrasonic/src/main/res/values-de/strings.xml
@ -3,6 +3,7 @@

    <string name="background_task.loading">Lade&#8230;</string>
    <string name="background_task.network_error">Ein Netzwerkfehler ist aufgetreten. Bitte die Serveradresse prüfen oder später noch einmal versuchen.</string>
+    <string name="background_task.unsupported_api">Server api v%1$s does not support this function.</string>
    <string name="background_task.no_network">Dieses Programm benötigt eine Netzwerkverbindung. Bitte das WLAN oder Mobilfunk einschalten.</string>
    <string name="background_task.not_found">Ressource nicht gefunden. Bitte die Serveradresse überprüfen.</string>
    <string name="background_task.parse_error">Antwort nicht verstanden. Bitte die Serveradresse überprüfen.</string>
--- a/ultrasonic/src/main/res/values-es/strings.xml
+++ b/ultrasonic/src/main/res/values-es/strings.xml
@ -3,6 +3,7 @@

    <string name="background_task.loading">Cargando&#8230;</string>
    <string name="background_task.network_error">Se ha producido un error de red. Por favor comprueba la dirección del servidor o reinténtalo mas tarde.</string>
+    <string name="background_task.unsupported_api">Server api v%1$s does not support this function.</string>
    <string name="background_task.no_network">Este programa requiere acceso a la red. Por favor enciende la Wi-Fi o la red móvil.</string>
    <string name="background_task.not_found">Recurso no encontrado. Por favor comprueba la dirección del servidor.</string>
    <string name="background_task.parse_error">No se entiende la respuesta. Por favor comprueba la dirección del servidor.</string>
--- a/ultrasonic/src/main/res/values-fr/strings.xml
+++ b/ultrasonic/src/main/res/values-fr/strings.xml
@ -3,6 +3,7 @@

    <string name="background_task.loading">Chargement&#8230;</string>
    <string name="background_task.network_error">Une erreur réseau est survenue. Veuillez vérifier l\'adresse du serveur ou réessayer plus tard.</string>
+    <string name="background_task.unsupported_api">Server api v%1$s does not support this function.</string>
    <string name="background_task.no_network">Cette application requiert un accès au réseau. Veuillez activer le Wi-Fi ou le réseau mobile.</string>
    <string name="background_task.not_found">Ressources introuvables. Veuillez vérifier l\'adresse du serveur.</string>
    <string name="background_task.parse_error">Réponse incorrecte. Veuillez vérifier l\'adresse du serveur.</string>
--- a/ultrasonic/src/main/res/values-hu/strings.xml
+++ b/ultrasonic/src/main/res/values-hu/strings.xml
@ -3,6 +3,7 @@

    <string name="background_task.loading">Betöltés&#8230;</string>
    <string name="background_task.network_error">Hálózati hiba történt! Kérjük, ellenőrizze a kiszolgáló címét vagy próbálja később!</string>
+    <string name="background_task.unsupported_api">A v%1$s verziójú Szerver api nem támogatja ezt a funkciót.</string>
    <string name="background_task.no_network">Az alkalmazás hálózati hozzáférést igényel. Kérjük, kapcsolja be a Wi-Fi-t vagy a mobilhálózatot!</string>
    <string name="background_task.not_found">Az erőforrás nem található! Kérjük, ellenőrizze a kiszolgáló címét!</string>
    <string name="background_task.parse_error">Értelmezhetetlen válasz! Kérjük, ellenőrizze a kiszolgáló címét!</string>
--- a/ultrasonic/src/main/res/values-nl/strings.xml
+++ b/ultrasonic/src/main/res/values-nl/strings.xml
@ -3,6 +3,7 @@

    <string name="background_task.loading">Bezig met laden&#8230;</string>
    <string name="background_task.network_error">Er is een netwerkfout opgetreden. Controleer het serveradres of probeer het later opnieuw.</string>
+    <string name="background_task.unsupported_api">Server api v%1$s does not support this function.</string>
    <string name="background_task.no_network">Deze app vereist netwerktoegang. Schakel Wi-Fi of mobiel internet in.</string>
    <string name="background_task.not_found">Bron niet gevonden. Controleer het serveradres.</string>
    <string name="background_task.parse_error">Het antwoord werd niet begrepen. Controleer het serveradres.</string>
--- a/ultrasonic/src/main/res/values-pl/strings.xml
+++ b/ultrasonic/src/main/res/values-pl/strings.xml
@ -3,6 +3,7 @@

    <string name="background_task.loading">Ładowanie&#8230;</string>
    <string name="background_task.network_error">Wystąpił błąd sieci. Proszę sprawdzić adres serwera i spróbować później.</string>
+    <string name="background_task.unsupported_api">Server api v%1$s does not support this function.</string>
    <string name="background_task.no_network">Ta aplikacja wymaga dostępu do sieci. Proszę włączyć wi-fi lub dane komórkowe.</string>
    <string name="background_task.not_found">Nie znaleziono zasobów. Proszę sprawdzić adres serwera.</string>
    <string name="background_task.parse_error">Brak prawidłowej odpowiedzi. Proszę sprawdzić adres serwera.</string>
--- a/ultrasonic/src/main/res/values-pt-rBR/strings.xml
+++ b/ultrasonic/src/main/res/values-pt-rBR/strings.xml
@ -3,6 +3,7 @@

    <string name="background_task.loading">Carregando&#8230;</string>
    <string name="background_task.network_error">Ocorreu um erro de rede. Verifique o endereço do servidor ou tente mais tarde.</string>
+    <string name="background_task.unsupported_api">Server api v%1$s does not support this function.</string>
    <string name="background_task.no_network">Este aplicativo requer acesso à rede. Ligue o Wi-Fi ou a rede de dados.</string>
    <string name="background_task.not_found">Recurso não encontrado. Verifique o endereço do servidor.</string>
    <string name="background_task.parse_error">Não entendi a resposta. Verifique o endereço do servidor.</string>
--- a/ultrasonic/src/main/res/values-pt/strings.xml
+++ b/ultrasonic/src/main/res/values-pt/strings.xml
@ -3,6 +3,7 @@

    <string name="background_task.loading">Carregando&#8230;</string>
    <string name="background_task.network_error">Ocorreu um erro de rede. Verifique o endereço do servidor ou tente mais tarde.</string>
+    <string name="background_task.unsupported_api">Server api v%1$s does not support this function.</string>
    <string name="background_task.no_network">Este aplicativo requer acesso à rede. Ligue o Wi-Fi ou a rede de dados.</string>
    <string name="background_task.not_found">Recurso não encontrado. Verifique o endereço do servidor.</string>
    <string name="background_task.parse_error">Não entendi a resposta. Verifique o endereço do servidor.</string>
--- a/ultrasonic/src/main/res/values/strings.xml
+++ b/ultrasonic/src/main/res/values/strings.xml
@ -3,6 +3,7 @@

    <string name="background_task.loading">Loading&#8230;</string>
    <string name="background_task.network_error">A network error occurred. Please check the server address or try again later.</string>
+    <string name="background_task.unsupported_api">Server api v%1$s does not support this function.</string>
    <string name="background_task.no_network">This program requires network access. Please turn on Wi-Fi or mobile network.</string>
    <string name="background_task.not_found">Resource not found. Please check the server address.</string>
    <string name="background_task.parse_error">Didn\'t understand the reply. Please check the server address.</string>