From 93e77b39d9ebf79a38a48373d8f59c78084e1276 Mon Sep 17 00:00:00 2001
From: Mixficsol <838844609@qq.com>
Date: Wed, 6 Mar 2024 21:07:42 +0800
Subject: [PATCH] add rename-command  config (#2455)

add rename-command  config
---
 conf/pika.conf                   | 15 +++++++++++++++
 include/pika_cmd_table_manager.h |  1 +
 include/pika_conf.h              |  2 +-
 src/pika.cc                      |  4 ++--
 src/pika_cmd_table_manager.cc    | 12 ++++++++++++
 src/pika_conf.cc                 | 22 ++++++++++++++++++++--
 6 files changed, 51 insertions(+), 5 deletions(-)

diff --git a/conf/pika.conf b/conf/pika.conf
index 44c2de9067..398f99eb8b 100644
--- a/conf/pika.conf
+++ b/conf/pika.conf
@@ -511,3 +511,18 @@ cache-lfu-decay-time: 1
 #
 # aclfile : ../conf/users.acl
 
+# It is possible to change the name of dangerous commands in a shared environment.
+# For instance the CONFIG command may be renamed into something Warning: To prevent
+# data inconsistency caused by different configuration files, do not use the rename
+# command to modify write commands on the primary and secondary servers. If necessary,
+# ensure that the configuration files of the primary and secondary servers are consistent
+# In addition, when using the command rename, you must not use ""  to modify the command,
+# for example, rename-command: FLUSHALL "360flushall" is incorrect; instead, use
+# rename-command: FLUSHALL 360flushall is correct. After the rename command is executed,
+# it is most appropriate to use a numeric string with uppercase or lowercase letters
+# for example: rename-command : FLUSHALL joYAPNXRPmcarcR4ZDgC81TbdkSmLAzRPmcarcR
+#
+# Example:
+#
+# rename-command : FLUSHALL 360flushall
+# rename-command : FLUSHDB 360flushdb
diff --git a/include/pika_cmd_table_manager.h b/include/pika_cmd_table_manager.h
index 1b0c162807..27393da4ec 100644
--- a/include/pika_cmd_table_manager.h
+++ b/include/pika_cmd_table_manager.h
@@ -30,6 +30,7 @@ class PikaCmdTableManager {
   PikaCmdTableManager();
   virtual ~PikaCmdTableManager() = default;
   void InitCmdTable(void);
+  void RenameCommand(const std::string before, const std::string after);
   std::shared_ptr<Cmd> GetCmd(const std::string& opt);
   bool CmdExist(const std::string& cmd) const;
   CmdTable* GetCmdTable();
diff --git a/include/pika_conf.h b/include/pika_conf.h
index 6b0917ee76..0bf1d3972f 100644
--- a/include/pika_conf.h
+++ b/include/pika_conf.h
@@ -765,7 +765,7 @@ class PikaConf : public pstd::BaseConf {
   std::vector<std::string> users_;  // acl user rules
 
   std::string aclFile_;
-
+  std::vector<std::string> cmds_;
   std::atomic<uint32_t> acl_pubsub_default_ = 0;  // default channel pub/sub permission
   std::atomic<uint32_t> acl_Log_max_len_ = 0;      // default acl log max len
 
diff --git a/src/pika.cc b/src/pika.cc
index 89f344cb76..760c962745 100644
--- a/src/pika.cc
+++ b/src/pika.cc
@@ -175,6 +175,8 @@ int main(int argc, char* argv[]) {
     usage();
     exit(-1);
   }
+  g_pika_cmd_table_manager = std::make_unique<PikaCmdTableManager>();
+  g_pika_cmd_table_manager->InitCmdTable();
   PikaConfInit(path);
 
   rlimit limit;
@@ -205,8 +207,6 @@ int main(int argc, char* argv[]) {
   PikaSignalSetup();
 
   LOG(INFO) << "Server at: " << path;
-  g_pika_cmd_table_manager = std::make_unique<PikaCmdTableManager>();
-  g_pika_cmd_table_manager->InitCmdTable();
   g_pika_server = new PikaServer();
   g_pika_rm = std::make_unique<PikaReplicaManager>();
   g_network_statistic = std::make_unique<net::NetworkStatistic>();
diff --git a/src/pika_cmd_table_manager.cc b/src/pika_cmd_table_manager.cc
index 567c120a18..2be143a84e 100644
--- a/src/pika_cmd_table_manager.cc
+++ b/src/pika_cmd_table_manager.cc
@@ -50,6 +50,18 @@ void PikaCmdTableManager::InitCmdTable(void) {
   }
 }
 
+void PikaCmdTableManager::RenameCommand(const std::string before, const std::string after) {
+  auto it = cmds_->find(before);
+  if (it != cmds_->end()) {
+    if (after.length() > 0) {
+      cmds_->insert(std::pair<std::string, std::unique_ptr<Cmd>>(after, std::move(it->second)));
+    } else {
+      LOG(ERROR) << "The value of rename-command is null";
+    }
+    cmds_->erase(it);
+  }
+}
+
 std::unordered_map<std::string, CommandStatistics>* PikaCmdTableManager::GetCommandStatMap() {
   return &cmdstat_map_;
 }
diff --git a/src/pika_conf.cc b/src/pika_conf.cc
index 09ae68996e..2c5ac2ef7f 100644
--- a/src/pika_conf.cc
+++ b/src/pika_conf.cc
@@ -10,10 +10,12 @@
 
 #include "cache/include/config.h"
 #include "include/acl.h"
-#include "include/pika_define.h"
+#include "include/pika_cmd_table_manager.h"
 #include "include/pika_conf.h"
+#include "include/pika_define.h"
 
 using pstd::Status;
+extern std::unique_ptr<PikaCmdTableManager> g_pika_cmd_table_manager;
 
 PikaConf::PikaConf(const std::string& path)
     : pstd::BaseConf(path), conf_path_(path) {}
@@ -465,7 +467,23 @@ int PikaConf::Load() {
   GetConfStrMulti("user", &users_);
 
   GetConfStr("aclfile", &aclFile_);
-
+  GetConfStrMulti("rename-command", &cmds_);
+  for (const auto & i : cmds_) {
+    std::string before, after;
+    std::istringstream iss(i);
+    iss >> before;
+    if (iss) {
+      iss >> after;
+      pstd::StringToLower(before);
+      pstd::StringToLower(after);
+      std::shared_ptr<Cmd> c_ptr = g_pika_cmd_table_manager->GetCmd(before);
+      if (!c_ptr) {
+        LOG(ERROR) << "No such " << before << " command in pika-command";
+        return -1;
+      }
+      g_pika_cmd_table_manager->RenameCommand(before, after);
+    }
+  }
   std::string acl_pubsub_default;
   GetConfStr("acl-pubsub-default", &acl_pubsub_default);
   if (acl_pubsub_default == "allchannels") {