Fix #35505: send lang as env var

Author: LEDfan

src/main/java/eu/openanalytics/containerproxy/model/runtime/runtimevalues/LanguageKey.java

@@ -0,0 +1,49 @@
+/*
+ * ContainerProxy
+ *
+ * Copyright (C) 2016-2026 Open Analytics
+ *
+ * ===========================================================================
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the Apache License as published by
+ * The Apache Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * Apache License for more details.
+ *
+ * You should have received a copy of the Apache License
+ * along with this program.  If not, see <http://www.apache.org/licenses/>
+ */
+package eu.openanalytics.containerproxy.model.runtime.runtimevalues;
+
+public class LanguageKey extends RuntimeValueKey<String> {
+
+    public static final LanguageKey inst = new LanguageKey();
+
+    private LanguageKey() {
+        super("openanalytics.eu/sp-language",
+            "SHINYPROXY_LANGUAGE",
+            false,
+            true,
+            true,
+            false, // no need to expose in API
+            true,
+            false,
+            String.class);
+    }
+
+    @Override
+    public String deserializeFromString(String value) {
+        return value;
+    }
+
+    @Override
+    public String serializeToString(String value) {
+        return value;
+    }
+
+}

src/main/java/eu/openanalytics/containerproxy/model/runtime/runtimevalues/RuntimeValueKeyRegistry.java

@@ -53,6 +53,7 @@ public class RuntimeValueKeyRegistry {
         addRuntimeValueKey(HttpHeadersKey.inst);
         addRuntimeValueKey(TargetIdKey.inst);
         addRuntimeValueKey(CacheHeadersModeKey.inst);
+        addRuntimeValueKey(LanguageKey.inst);
     }
 
     public static void addRuntimeValueKey(RuntimeValueKey<?> key) {

src/main/java/eu/openanalytics/containerproxy/service/ProxyService.java

@@ -37,6 +37,7 @@
 import eu.openanalytics.containerproxy.model.runtime.ProxyStartupLog;
 import eu.openanalytics.containerproxy.model.runtime.ProxyStatus;
 import eu.openanalytics.containerproxy.model.runtime.ProxyStopReason;
+import eu.openanalytics.containerproxy.model.runtime.runtimevalues.LanguageKey;
 import eu.openanalytics.containerproxy.model.runtime.runtimevalues.RuntimeValue;
 import eu.openanalytics.containerproxy.model.spec.ContainerSpec;
 import eu.openanalytics.containerproxy.model.spec.ProxySpec;
@@ -49,6 +50,7 @@
 import org.slf4j.LoggerFactory;
 import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.context.annotation.Lazy;
+import org.springframework.context.i18n.LocaleContextHolder;
 import org.springframework.core.env.Environment;
 import org.springframework.data.util.Pair;
 import org.springframework.security.access.AccessDeniedException;
@@ -318,6 +320,7 @@ public Command startProxy(Authentication user, ProxySpec spec, List<RuntimeValue
             if (runtimeValues != null) {
                 proxyBuilder.addRuntimeValues(runtimeValues);
             }
+            proxyBuilder.addRuntimeValue(new RuntimeValue(LanguageKey.inst, LocaleContextHolder.getLocale().getLanguage()), true);
 
             Proxy currentProxy = runtimeValueService.processParameters(user, spec, parameters, proxyBuilder.build());
             proxyStore.addProxy(currentProxy);