mysql模块(项目地址为https://github.com/mysqljs/mysql)是一个开源的、JavaScript编写的MySQL驱动,可以在Node.js应用中来操作MySQL。但在使用过程中,出现了“ER_NOT_SUPPORTED_AUTH_MODE”问题。
本文介绍了出现该问题的原因及解决方案。
报错信息
当我试图使用mysql模块来连接MySQL 8时,出现了如下错误信息:
D:\workspaceGithub\nodejs-book-samples\samples\mysql-demo\index.js:17
throw error;
^
Error: ER_NOT_SUPPORTED_AUTH_MODE: Client does not support authentication protocol requested by server; consider upgrading MySQL client
at Handshake.Sequence._packetToError (D:\workspaceGithub\nodejs-book-samples\samples\mysql-demo\node_modules\mysql\lib\protocol\sequences\Sequence.js:47:14)
at Handshake.ErrorPacket (D:\workspaceGithub\nodejs-book-samples\samples\mysql-demo\node_modules\mysql\lib\protocol\sequences\Handshake.js:123:18)
at Protocol._parsePacket (D:\workspaceGithub\nodejs-book-samples\samples\mysql-demo\node_modules\mysql\lib\protocol\Protocol.js:291:23)
at Parser._parsePacket (D:\workspaceGithub\nodejs-book-samples\samples\mysql-demo\node_modules\mysql\lib\protocol\Parser.js:433:10)
at Parser.write (D:\workspaceGithub\nodejs-book-samples\samples\mysql-demo\node_modules\mysql\lib\protocol\Parser.js:43:10)
at Protocol.write (D:\workspaceGithub\nodejs-book-samples\samples\mysql-demo\node_modules\mysql\lib\protocol\Protocol.js:38:16)
at Socket.<anonymous> (D:\workspaceGithub\nodejs-book-samples\samples\mysql-demo\node_modules\mysql\lib\Connection.js:91:28)
at Socket.<anonymous> (D:\workspaceGithub\nodejs-book-samples\samples\mysql-demo\node_modules\mysql\lib\Connection.js:525:10)
at Socket.emit (events.js:196:13)
at addChunk (_stream_readable.js:290:12)
--------------------
at Protocol._enqueue (D:\workspaceGithub\nodejs-book-samples\samples\mysql-demo\node_modules\mysql\lib\protocol\Protocol.js:144:48)
at Protocol.handshake (D:\workspaceGithub\nodejs-book-samples\samples\mysql-demo\node_modules\mysql\lib\protocol\Protocol.js:51:23)
at Connection.connect (D:\workspaceGithub\nodejs-book-samples\samples\mysql-demo\node_modules\mysql\lib\Connection.js:119:18)
at Object.<anonymous> (D:\workspaceGithub\nodejs-book-samples\samples\mysql-demo\index.js:12:12)
at Module._compile (internal/modules/cjs/loader.js:759:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:770:10)
at Module.load (internal/modules/cjs/loader.js:628:32)
at Function.Module._load (internal/modules/cjs/loader.js:555:12)
at Function.Module.runMain (internal/modules/cjs/loader.js:826:10)
at internal/main/run_main_module.js:17:11
出错原因
导致这个错误的原因是,目前,最新的mysql模块并未完全支持MySQL 8的“caching_sha2_password”加密方式,而“caching_sha2_password”在MySQL 8中是默认的加密方式。因此,下面的方式命令是默认已经使用了“caching_sha2_password”加密方式,该账号、密码无法在mysql模块中使用。
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.12 sec)
解决方法
解决方法是从新修改用户root的密码,并指定mysql模块能够支持的加密方式:
mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456';
Query OK, 0 rows affected (0.12 sec)
上述语句,显示指定了使用“mysql_native_password”的加密方式。这种方式是在mysql模块能够支持。
再此运行应用,可以看到如下的控制台输出信息:
$ node index.js
The result is: RowDataPacket { user_id: 1, username: '老卫' }
其中,“RowDataPacket { user_id: 1, username: '老卫' }”就是数据库查询的结果。
源码
本节例子可以在https://github.com/waylau/nodejs-book-samples的“mysql-demo”应用中找到。
参考引用
- 本文同步至: https://waylau.com/node.js-mysql-client-does-not-support-authentication-protocol/
- 有关MySQL 8的“caching_sha2_password”加密方式,可见https://dev.mysql.com/doc/refman/8.0/en/upgrading-from-previous-series.html#upgrade-caching-sha2-password