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/**
* Copyright (C) 2012-2016 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kCommand
#include "mongo/platform/basic.h"
#include "mongo/bson/util/bson_extract.h"
#include "mongo/bson/util/builder.h"
#include "mongo/db/commands.h"
#include "mongo/db/commands/test_commands_enabled.h"
#include "mongo/db/log_process_details.h"
#include "mongo/util/log.h"
#include "mongo/util/processinfo.h"
#include "mongo/util/ramlog.h"
#include <sstream>
#include <string>
#include <vector>
namespace mongo {
namespace {
using std::string;
using std::stringstream;
using std::vector;
class PingCommand : public BasicCommand {
public:
PingCommand() : BasicCommand("ping") {}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kAlways;
}
std::string help() const override {
return "a way to check that the server is alive. responds immediately even if server is "
"in a db lock.";
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
virtual bool allowsAfterClusterTime(const BSONObj& cmdObj) const override {
return false;
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) const {} // No auth required
virtual bool requiresAuth() const override {
return false;
}
virtual bool run(OperationContext* opCtx,
const string& badns,
const BSONObj& cmdObj,
BSONObjBuilder& result) {
// IMPORTANT: Don't put anything in here that might lock db - including authentication
return true;
}
} pingCmd;
class EchoCommand final : public TypedCommand<EchoCommand> {
public:
struct Request {
static constexpr auto kCommandName = "echo"_sd;
static Request parse(const IDLParserErrorContext&, const OpMsgRequest& request) {
return Request{request};
}
const OpMsgRequest& request;
};
class Invocation final : public MinimalInvocationBase {
public:
using MinimalInvocationBase::MinimalInvocationBase;
private:
bool supportsWriteConcern() const override {
return false;
}
void doCheckAuthorization(OperationContext* opCtx) const override {}
NamespaceString ns() const override {
return NamespaceString(request().request.getDatabase());
}
void run(OperationContext* opCtx, CommandReplyBuilder* result) override {
result->append("echo", request().request.body);
}
};
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kAlways;
}
bool requiresAuth() const override {
return false;
}
};
constexpr StringData EchoCommand::Request::kCommandName;
MONGO_INITIALIZER(RegisterEcho)(InitializerContext* context) {
if (getTestCommandsEnabled()) {
new EchoCommand();
}
return Status::OK();
}
class ListCommandsCmd : public BasicCommand {
public:
std::string help() const override {
return "get a list of all db commands";
}
ListCommandsCmd() : BasicCommand("listCommands") {}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kAlways;
}
virtual bool adminOnly() const {
return false;
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) const {} // No auth required
virtual bool run(OperationContext* opCtx,
const string& ns,
const BSONObj& cmdObj,
BSONObjBuilder& result) {
// sort the commands before building the result BSON
std::vector<Command*> commands;
for (const auto command : globalCommandRegistry()->allCommands()) {
// don't show oldnames
if (command.first == command.second->getName())
commands.push_back(command.second);
}
std::sort(commands.begin(), commands.end(), [](Command* lhs, Command* rhs) {
return (lhs->getName()) < (rhs->getName());
});
BSONObjBuilder b(result.subobjStart("commands"));
for (const auto& c : commands) {
BSONObjBuilder temp(b.subobjStart(c->getName()));
temp.append("help", c->help());
temp.append("slaveOk",
c->secondaryAllowed(opCtx->getServiceContext()) ==
Command::AllowedOnSecondary::kAlways);
temp.append("adminOnly", c->adminOnly());
// optionally indicates that the command can be forced to run on a slave/secondary
if (c->secondaryAllowed(opCtx->getServiceContext()) ==
Command::AllowedOnSecondary::kOptIn)
temp.append("slaveOverrideOk", true);
temp.done();
}
b.done();
return 1;
}
} listCommandsCmd;
} // namespace
} // namespace mongo
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