fix(mongo_client): close cursors (#47)

go.mod

@@ -8,5 +8,4 @@ require (
 	github.com/pkg/errors v0.9.1
 	github.com/spiral/goridge/v2 v2.4.4
 	go.mongodb.org/mongo-driver v1.3.3
-	golang.org/x/sys v0.0.0-20190531175056-4c3a928424d2
 )

go.sum

@@ -0,0 +1,128 @@
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+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

pkg/mongo_client/mongo_client.go

@@ -173,6 +173,7 @@ func (m *MongoProxy) Find(payload []byte, result *[]byte) error {
 		collection := m.client.Database(cmd.Database).Collection(cmd.Collection)
 		cursor, err := collection.Find(ctx, cmd.Filter, cmd.Opts)
 		if cursor != nil {
+			defer cursor.Close(ctx)
 			err = cursor.All(ctx, &rr)
 		}
 		*r = rr
@@ -300,6 +301,7 @@ func (m *MongoProxy) Aggregate(payload []byte, result *[]byte) error {
 		collection := m.client.Database(cmd.Database).Collection(cmd.Collection)
 		cursor, err := collection.Aggregate(ctx, cmd.Pipeline, cmd.Opts)
 		if cursor != nil {
+			defer cursor.Close(ctx)
 			err = cursor.All(ctx, &rr)
 		}
 		*r = rr
@@ -426,6 +428,7 @@ func (m *MongoProxy) ListIndexes(payload []byte, result *[]byte) error {
 		collection := m.client.Database(cmd.Database).Collection(cmd.Collection)
 		cursor, err := collection.Indexes().List(ctx, cmd.Opts)
 		if cursor != nil {
+			defer cursor.Close(ctx)
 			err = cursor.All(ctx, &rr)
 			*r = rr
 		}
@@ -473,6 +476,7 @@ func (m *MongoProxy) RunCommandCursor(payload []byte, result *[]byte) error {
 		database := m.client.Database(cmd.Database)
 		cursor, err := database.RunCommandCursor(ctx, cmd.Command, cmd.Opts)
 		if cursor != nil {
+			defer cursor.Close(ctx)
 			err = cursor.All(ctx, &rr)
 		}
 		*r = rr