SERVER-48866 Parse Versioned API parameters

5 files changed, 157 insertions, 0 deletions

diff --git a/src/mongo/db/SConscript b/src/mongo/db/SConscript
index ffaa6527748..700b5be4105 100644
--- a/src/mongo/db/SConscript
+++ b/src/mongo/db/SConscript
@@ -1398,7 +1398,9 @@ env.Library(
 env.Library(
     target='shared_request_handling',
     source=[
+        'initialize_api_parameters.cpp',
         'transaction_validation.cpp',
+        env.Idlc('initialize_api_parameters.idl')[0],
     ],
     LIBDEPS=[
         'error_labels',
diff --git a/src/mongo/db/initialize_api_parameters.cpp b/src/mongo/db/initialize_api_parameters.cpp
new file mode 100644
index 00000000000..e6f31cbb8c5
--- /dev/null
+++ b/src/mongo/db/initialize_api_parameters.cpp
@@ -0,0 +1,52 @@
+/**
+ *    Copyright (C) 2020-present MongoDB, Inc.
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the Server Side Public License, version 1,
+ *    as published by MongoDB, Inc.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    Server Side Public License for more details.
+ *
+ *    You should have received a copy of the Server Side Public License
+ *    along with this program. If not, see
+ *    <http://www.mongodb.com/licensing/server-side-public-license>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the Server Side Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#include "mongo/db/initialize_api_parameters.h"
+
+namespace mongo {
+
+APIParametersFromClient initializeAPIParameters(const BSONObj& requestBody) {
+
+    auto vAPI = APIParametersFromClient::parse("APIParametersFromClient"_sd, requestBody);
+
+    if (vAPI.getApiDeprecationErrors() || vAPI.getApiStrict()) {
+        uassert(4886600,
+                "Provided apiStrict and/or apiDeprecationErrors without passing apiVersion",
+                vAPI.getApiVersion());
+    }
+
+    if (vAPI.getApiVersion()) {
+        uassert(ErrorCodes::APIVersionError,
+                "API version must be \"1\"",
+                "1" == vAPI.getApiVersion().value());
+    }
+    return vAPI;
+}
+
+}  // namespace mongo
diff --git a/src/mongo/db/initialize_api_parameters.h b/src/mongo/db/initialize_api_parameters.h
new file mode 100644
index 00000000000..69d216fc7cc
--- /dev/null
+++ b/src/mongo/db/initialize_api_parameters.h
@@ -0,0 +1,42 @@
+/**
+ *    Copyright (C) 2020-present MongoDB, Inc.
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the Server Side Public License, version 1,
+ *    as published by MongoDB, Inc.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    Server Side Public License for more details.
+ *
+ *    You should have received a copy of the Server Side Public License
+ *    along with this program. If not, see
+ *    <http://www.mongodb.com/licensing/server-side-public-license>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the Server Side Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#pragma once
+
+#include "mongo/db/initialize_api_parameters_gen.h"
+
+namespace mongo {
+
+/**
+ * Parses a command's API Version parameters from a request and stores the apiVersion, apiStrict,
+ * and apiDeprecationErrors fields.
+ */
+APIParametersFromClient initializeAPIParameters(const BSONObj& requestBody);
+
+}  // namespace mongo
\ No newline at end of file
diff --git a/src/mongo/db/initialize_api_parameters.idl b/src/mongo/db/initialize_api_parameters.idl
new file mode 100644
index 00000000000..d44c7402603
--- /dev/null
+++ b/src/mongo/db/initialize_api_parameters.idl
@@ -0,0 +1,57 @@
+# Copyright (C) 2020-present MongoDB, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the Server Side Public License, version 1,
+# as published by MongoDB, Inc.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# Server Side Public License for more details.
+#
+# You should have received a copy of the Server Side Public License
+# along with this program. If not, see
+# <http://www.mongodb.com/licensing/server-side-public-license>.
+#
+# As a special exception, the copyright holders give permission to link the
+# code of portions of this program with the OpenSSL library under certain
+# conditions as described in each individual source file and distribute
+# linked combinations including the program with the OpenSSL library. You
+# must comply with the Server Side Public License in all respects for
+# all of the code used other than as permitted herein. If you modify file(s)
+# with this exception, you may extend this exception to your version of the
+# file(s), but you are not obligated to do so. If you do not wish to do so,
+# delete this exception statement from your version. If you delete this
+# exception statement from all source files in the program, then also delete
+# it in the license file.
+
+# This IDL file describes the BSON format for an APIParametersFromClient. 
+# It also handles the serialization to / deserialization from its
+# BSON representation for that class.
+
+global:
+  cpp_namespace: "mongo"
+
+imports:
+  - "mongo/idl/basic_types.idl"
+
+structs: 
+
+  APIParametersFromClient: 
+    description: "Parser for pulling out VersionedAPI parameters from commands"
+    strict: false
+    fields:
+      apiVersion:
+        description: "The api version specified by the command" 
+        type: string
+        optional: true 
+      apiStrict: 
+        description: "With apiVersion: 'V' and apiStrict: true, the server rejects requests to 
+        use behaviors not included in V"
+        type: bool 
+        optional: true 
+      apiDeprecationErrors: 
+        description: "With apiVersion: 'V' and apiDeprecationErrors: true, the server rejects
+        requests to use behaviors deprecated in V in the current MongoDB release"
+        type: bool 
+        optional: true
\ No newline at end of file
diff --git a/src/mongo/db/service_entry_point_common.cpp b/src/mongo/db/service_entry_point_common.cpp
index 15681bc8522..4dc77547321 100644
--- a/src/mongo/db/service_entry_point_common.cpp
+++ b/src/mongo/db/service_entry_point_common.cpp
@@ -50,6 +50,7 @@
 #include "mongo/db/cursor_manager.h"
 #include "mongo/db/dbdirectclient.h"
 #include "mongo/db/error_labels.h"
+#include "mongo/db/initialize_api_parameters.h"
 #include "mongo/db/initialize_operation_session_info.h"
 #include "mongo/db/introspect.h"
 #include "mongo/db/jsobj.h"
@@ -931,6 +932,9 @@ void execCommandDatabase(OperationContext* opCtx,
         rpc::TrackingMetadata::get(opCtx).initWithOperName(command->getName());
 
         auto const replCoord = repl::ReplicationCoordinator::get(opCtx);
+
+        auto apiParams = initializeAPIParameters(request.body);
+
         sessionOptions = initializeOperationSessionInfo(
             opCtx,
             request.body,