add param check for getAttachment

src/jio/features/restParamChecker.js

@@ -96,7 +96,7 @@ function enableRestParamChecker(jio, shared) {
     }
   });
 
-  ["getAttachment", "removeAttachment"].forEach(function (method) {
+  ["removeAttachment"].forEach(function (method) {
     shared.on(method, function (param) {
       if (!checkId(param)) {
         checkAttachmentId(param);
@@ -104,6 +104,26 @@ function enableRestParamChecker(jio, shared) {
     });
   });
 
+
+  ["getAttachment"].forEach(function (method) {
+    shared.on(method, function (param) {
+      if (param.storage_spec.type !== "indexeddb" &&
+          param.storage_spec.type !== "dav" &&
+          (param.kwargs._start !== undefined
+           || param.kwargs._end !== undefined)) {
+        restCommandRejecter(param, [
+          'bad_request',
+          'unsupport',
+          '_start, _end not support'
+        ]);
+        return false;
+      }
+      if (!checkId(param)) {
+        checkAttachmentId(param);
+      }
+    });
+  });
+
   ["check", "repair"].forEach(function (method) {
     shared.on(method, function (param) {
       if (param.kwargs._id !== undefined) {