Close #189

Author: ingvord

src/main/java/org/tango/rest/TangoRestApi.java

@@ -27,6 +27,7 @@
 import org.tango.web.server.interceptors.TangoAttributeValueInterceptor;
 import org.tango.web.server.providers.*;
 import org.tango.web.server.v10.readers.CommandInOutBodyReader;
+import org.tango.web.server.writers.PlainTextWriter;
 
 import javax.servlet.ServletContext;
 import javax.ws.rs.ApplicationPath;
@@ -97,6 +98,7 @@ public Set<Object> getSingletons() {
         singletons.add(new JsonpResponseWrapper());
 
         singletons.add(new CommandInOutBodyReader());
+        singletons.add(new PlainTextWriter());
 
         return singletons;
     }

src/main/java/org/tango/web/server/writers/PlainTextWriter.java

@@ -0,0 +1,32 @@
+package org.tango.web.server.writers;
+
+import com.google.gson.Gson;
+
+import javax.ws.rs.WebApplicationException;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.MultivaluedMap;
+import javax.ws.rs.ext.MessageBodyWriter;
+import javax.ws.rs.ext.Provider;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Type;
+
+/**
+ * @author ingvord
+ * @since 04.05.2020
+ */
+@Provider
+public class PlainTextWriter implements MessageBodyWriter<Object> {
+    private final Gson gson = new Gson();
+
+    @Override
+    public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
+        return mediaType.isCompatible(MediaType.TEXT_PLAIN_TYPE);
+    }
+
+    @Override
+    public void writeTo(Object o, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream) throws IOException, WebApplicationException {
+        entityStream.write(gson.toJson(o).getBytes(mediaType.getParameters().getOrDefault("charset", "UTF-8")));
+    }
+}