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/**
* Copyright (C) 2018-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/platform/basic.h"
#include "mongo/rpc/get_status_from_command_result.h"
#include "mongo/base/error_codes.h"
#include "mongo/base/status.h"
#include "mongo/bson/util/bson_extract.h"
#include "mongo/db/jsobj.h"
#include "mongo/rpc/write_concern_error_detail.h"
#include "mongo/util/str.h"
namespace mongo {
namespace {
const std::string kCmdResponseWriteConcernField = "writeConcernError";
const std::string kCmdResponseWriteErrorsField = "writeErrors";
} // namespace
Status getStatusFromCommandResult(const BSONObj& result) {
BSONElement okElement = result["ok"];
BSONElement codeElement = result["code"];
BSONElement errmsgElement = result["errmsg"];
// StaleConfigException doesn't pass "ok" in legacy servers
BSONElement dollarErrElement = result["$err"];
if (okElement.eoo() && dollarErrElement.eoo()) {
return Status(ErrorCodes::CommandResultSchemaViolation,
str::stream() << "No \"ok\" field in command result " << result);
}
if (okElement.trueValue()) {
return Status::OK();
}
int code = codeElement.numberInt();
if (0 == code) {
code = ErrorCodes::UnknownError;
}
std::string errmsg;
if (errmsgElement.type() == String) {
errmsg = errmsgElement.String();
} else if (!errmsgElement.eoo()) {
errmsg = errmsgElement.toString();
}
// we can't use startsWith(errmsg, "no such")
// as we have errors such as "no such collection"
if (code == ErrorCodes::UnknownError &&
(str::startsWith(errmsg, "no such cmd") || str::startsWith(errmsg, "no such command"))) {
code = ErrorCodes::CommandNotFound;
}
return Status(ErrorCodes::Error(code), errmsg, result);
}
Status getWriteConcernStatusFromCommandResult(const BSONObj& obj) {
BSONElement wcErrorElem;
Status status = bsonExtractTypedField(obj, kCmdResponseWriteConcernField, Object, &wcErrorElem);
if (!status.isOK()) {
if (status == ErrorCodes::NoSuchKey) {
return Status::OK();
} else {
return status;
}
}
BSONObj wcErrObj(wcErrorElem.Obj());
WriteConcernErrorDetail wcError;
std::string wcErrorParseMsg;
if (!wcError.parseBSON(wcErrObj, &wcErrorParseMsg)) {
return Status(ErrorCodes::UnsupportedFormat,
str::stream()
<< "Failed to parse write concern section due to " << wcErrorParseMsg);
}
std::string wcErrorInvalidMsg;
if (!wcError.isValid(&wcErrorInvalidMsg)) {
return Status(ErrorCodes::UnsupportedFormat,
str::stream()
<< "Failed to parse write concern section due to " << wcErrorInvalidMsg);
}
return wcError.toStatus();
}
Status getFirstWriteErrorStatusFromCommandResult(const BSONObj& cmdResponse) {
BSONElement writeErrorElem;
auto status = bsonExtractTypedField(
cmdResponse, kCmdResponseWriteErrorsField, BSONType::Array, &writeErrorElem);
if (!status.isOK()) {
if (status == ErrorCodes::NoSuchKey) {
return Status::OK();
} else {
return status;
}
}
auto firstWriteErrorElem = writeErrorElem.Obj().firstElement();
if (!firstWriteErrorElem) {
return Status::OK();
}
if (firstWriteErrorElem.type() != BSONType::Object) {
return Status(ErrorCodes::UnsupportedFormat,
str::stream() << "writeErrors should be an array of objects, found "
<< typeName(firstWriteErrorElem.type()));
}
auto firstWriteErrorObj = firstWriteErrorElem.Obj();
return Status(ErrorCodes::Error(firstWriteErrorObj["code"].Int()),
firstWriteErrorObj["errmsg"].String(),
firstWriteErrorObj);
}
Status getStatusFromWriteCommandReply(const BSONObj& cmdResponse) {
auto status = getStatusFromCommandResult(cmdResponse);
if (!status.isOK()) {
return status;
}
status = getFirstWriteErrorStatusFromCommandResult(cmdResponse);
if (!status.isOK()) {
return status;
}
return getWriteConcernStatusFromCommandResult(cmdResponse);
}
} // namespace mongo
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