Pass cancel and getPeer to underlying call

Author: drobertduke

packages/grpc-native-core/src/client_interceptors.js

@@ -707,59 +707,65 @@ function _getUnaryInterceptor(method_definition, channel, emitter, callback) {
   return function (options) {
     var call = common.getCall(channel, method_definition.path, options);
     var first_listener;
-    return new InterceptingCall(null, {
-      start: function (metadata, listener) {
-        var batch = {
-          [grpc.opType.SEND_INITIAL_METADATA]:
-            metadata._getCoreRepresentation(),
-        };
-        first_listener = listener;
-        call.startBatch(batch, function () {});
-      },
-      sendMessage: function(message) {
-        var batch = {
-          [grpc.opType.SEND_MESSAGE]: serialize(message),
-        };
-        call.startBatch(batch, function () {});
-      },
-      halfClose: function() {
-        var batch = {
-          [grpc.opType.SEND_CLOSE_FROM_CLIENT]: true,
-          [grpc.opType.RECV_INITIAL_METADATA]: true,
-          [grpc.opType.RECV_MESSAGE]: true,
-          [grpc.opType.RECV_STATUS_ON_CLIENT]: true
-        };
-        call.startBatch(batch, function (err, response) {
-          response.status.metadata = Metadata._fromCoreRepresentation(
-            response.status.metadata);
-          var status = response.status;
-          var deserialized;
-          if (status.code === constants.status.OK) {
-            if (err) {
-              // Got a batch error, but OK status. Something went wrong
-              callback(err);
-              return;
-            } else {
-              try {
-                deserialized = deserialize(response.read);
-              } catch (e) {
-                /* Change status to indicate bad server response. This
-                 * will result in passing an error to the callback */
-                status = {
-                  code: constants.status.INTERNAL,
-                  details: 'Failed to parse server response'
-                };
-              }
+    var final_requester = {};
+    final_requester.start = function (metadata, listener) {
+      var batch = {
+        [grpc.opType.SEND_INITIAL_METADATA]:
+          metadata._getCoreRepresentation(),
+      };
+      first_listener = listener;
+      call.startBatch(batch, function () { });
+    };
+    final_requester.sendMessage = function (message) {
+      var batch = {
+        [grpc.opType.SEND_MESSAGE]: serialize(message),
+      };
+      call.startBatch(batch, function () { });
+    };
+    final_requester.halfClose = function () {
+      var batch = {
+        [grpc.opType.SEND_CLOSE_FROM_CLIENT]: true,
+        [grpc.opType.RECV_INITIAL_METADATA]: true,
+        [grpc.opType.RECV_MESSAGE]: true,
+        [grpc.opType.RECV_STATUS_ON_CLIENT]: true
+      };
+      call.startBatch(batch, function (err, response) {
+        response.status.metadata = Metadata._fromCoreRepresentation(
+          response.status.metadata);
+        var status = response.status;
+        var deserialized;
+        if (status.code === constants.status.OK) {
+          if (err) {
+            // Got a batch error, but OK status. Something went wrong
+            callback(err);
+            return;
+          } else {
+            try {
+              deserialized = deserialize(response.read);
+            } catch (e) {
+              /* Change status to indicate bad server response. This
+               * will result in passing an error to the callback */
+              status = {
+                code: constants.status.INTERNAL,
+                details: 'Failed to parse server response'
+              };
             }
           }
-          response.metadata =
-            Metadata._fromCoreRepresentation(response.metadata);
-          first_listener.onReceiveMetadata(response.metadata);
-          first_listener.onReceiveMessage(deserialized);
-          first_listener.onReceiveStatus(status);
-        });
-      }
-    });
+        }
+        response.metadata =
+          Metadata._fromCoreRepresentation(response.metadata);
+        first_listener.onReceiveMetadata(response.metadata);
+        first_listener.onReceiveMessage(deserialized);
+        first_listener.onReceiveStatus(status);
+      });
+    };
+    final_requester.cancel = function () {
+      call.cancel();
+    };
+    final_requester.getPeer = function () {
+      return call.getPeer();
+    };
+    return new InterceptingCall(null, final_requester);
   };
 }
 
@@ -865,6 +871,12 @@ function _getClientStreamingInterceptor(method_definition, channel, emitter,
       };
       call.startBatch(batch, function () { });
     };
+    final_requester.cancel = function () {
+      call.cancel();
+    };
+    final_requester.getPeer = function() {
+      return call.getPeer();
+    };
     return new InterceptingCall(null, final_requester);
   };
 }
@@ -944,6 +956,12 @@ function _getServerStreamingInterceptor(method_definition, channel, emitter) {
       call.startBatch(recv_batch, _getStreamReadCallback(emitter, call,
         first_listener, deserialize));
     };
+    final_requester.cancel = function() {
+      call.cancel();
+    };
+    final_requester.getPeer = function() {
+      return call.getPeer();
+    };
     return new InterceptingCall(null, final_requester);
   };
 }
@@ -1041,6 +1059,12 @@ function _getBidiStreamingInterceptor(method_definition, channel, emitter) {
       call.startBatch(recv_batch, _getStreamReadCallback(emitter, call,
         first_listener, deserialize));
     };
+    final_requester.cancel = function() {
+      call.cancel();
+    };
+    final_requester.getPeer = function() {
+      return call.getPeer();
+    };
     return new InterceptingCall(null, final_requester);
   };
 }

packages/grpc-native-core/src/common.js

@@ -289,6 +289,12 @@ exports.getCall = function(channel, path, options) {
  * @param {function} next Calls the next interceptor.
  */
 
+/**
+ * @function GetPeerRequester
+ * @param {function} next Calls the next interceptor.
+ * @return {string}
+ */
+
 /**
  * @typedef {object} grpc~Requester
  * @param {MetadataRequester=} start A function triggered when the call begins.
@@ -298,6 +304,8 @@ exports.getCall = function(channel, path, options) {
  *     closes the call.
  * @param {CancelRequester=} cancel A function triggered when the call is
  *     cancelled.
+ * @param {GetPeerRequester=} getPeer A function triggered when the endpoint is
+ *     requested.
  */
 
 /**