Fix encoding in pretty mode

core/src/main/java/org/mapfish/print/servlet/MapPrinterServlet.java

@@ -789,7 +789,7 @@ public final void getCapabilities(
     if (pretty) {
       final JSONObject jsonObject =
           new JSONObject(prettyPrintBuffer.toString(Constants.DEFAULT_CHARSET));
-      capabilitiesResponse.getOutputStream().print(jsonObject.toString(JSON_INDENT_FACTOR));
+      capabilitiesResponse.getWriter().print(jsonObject.toString(JSON_INDENT_FACTOR));
     }
   }
 

examples/src/test/java/org/mapfish/print/PrintApiTest.java

@@ -89,6 +89,45 @@ public void testGetCapabilitiesPretty_NoApp() throws Exception {
     }
   }
 
+  private void capabilitiesTest(ClientHttpResponse response) throws Exception {
+    final JSONObject json = new JSONObject(getBodyAsText(response));
+    boolean found = false;
+    JSONArray layouts = json.getJSONArray("layouts");
+    JSONObject firstLayout = layouts.getJSONObject(0);
+    JSONArray attributes = firstLayout.getJSONArray("attributes");
+    for (int i = 0; i < attributes.length(); i++) {
+      Object v = attributes.get(i);
+      assertTrue(v instanceof JSONObject);
+      JSONObject o = (JSONObject) v;
+      if ("copyright".equals(o.getString("name"))) {
+        found = true;
+        assertEquals("© me", o.getString("default"));
+      }
+    }
+    assertTrue(found);
+  }
+
+  @Test
+  public void testGetCapabilitiesEncoding() throws Exception {
+    ClientHttpRequest request =
+        getPrintRequest("simple/" + MapPrinterServlet.CAPABILITIES_URL, HttpMethod.GET);
+    try (ClientHttpResponse response = request.execute()) {
+      assertEquals(HttpStatus.OK, response.getStatusCode());
+      capabilitiesTest(response);
+    }
+  }
+
+  @Test
+  public void testGetCapabilitiesEncodingPretty() throws Exception {
+    ClientHttpRequest request =
+        getPrintRequest(
+            "simple/" + MapPrinterServlet.CAPABILITIES_URL + "?pretty=true", HttpMethod.GET);
+    try (ClientHttpResponse response = request.execute()) {
+      assertEquals(HttpStatus.OK, response.getStatusCode());
+      capabilitiesTest(response);
+    }
+  }
+
   @Test
   public void testExampleRequest_NoApp() throws Exception {
     ClientHttpRequest request =

examples/src/test/resources/examples/simple/config.yaml

@@ -8,6 +8,8 @@ templates:
     attributes:
       title: !string
         default: 'Countries'
+      copyright: !string
+        default: '© me'
       map: !map
         maxDpi: 400
         width: 780