SQLer是一个微型http服务器,用Go语言编写,将旧的CGI概念应用于SQL查询。SQLer允许编写端点并分配一个SQL查询,以便任何人点击它时能执行查询。此外SQLer还允许自定义验证规则,可验证请求正文或查询参数。SQLer使用nginx样式配置语言(HCL)。
SQLer功能
- 无需依赖,可独立使用;
- 支持多种数据可类型,包括:SQL Server, MYSQL, SQLITE, PostgreSQL, Cockroachdb等;
- 内置RESTful服务器;
- 内置RESP Redis协议,可以使用任何redis客户端连接到SQLer;
- 内置Javascript解释器,可轻松转换结果;
- 内置验证器;
- 自动使用预备语句;
- 使用(HCL)配置语言;
- 可基于unix glob模式加载多个配置文件;
- 每条SQL查询可被命名为宏;
- 在每个宏内可使用
Go
text/template
; - 每个宏都有自己的Context(查询参数+正文参数)作为
.Input
(map [string] interface{}),而.Utils
是辅助函数列表,目前它只包含SQLEscape; - 可自定义授权程序,授权程序只是一个简单的webhook,sqler使用这个webhook验证是否应该完成某请求。
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配置概况
// create a macro/endpoint called "_boot",
// this macro is private "used within other macros"
// because it starts with "_".
// this rule only used within `RESTful` context.
_boot {
// the query we want to execute
exec = <<SQL
CREATE TABLE IF NOT EXISTS `users` (
`ID` INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
`name` VARCHAR(30) DEFAULT "@anonymous",
`email` VARCHAR(30) DEFAULT "@anonymous",
`password` VARCHAR(200) DEFAULT "",
`time` INT UNSIGNED
);
SQL
}
// adduser macro/endpoint, just hit `/adduser` with
// a `?user_name=&user_email=` or json `POST` request
// with the same fields.
adduser {
// what request method will this macro be called
// default: ["ANY"]
// this only used within `RESTful` context.
methods = ["POST"]
// authorizers,
// sqler will attempt to send the incoming authorization header
// to the provided endpoint(s) as `Authorization`,
// each endpoint MUST return `200 OK` so sqler can continue, other wise,
// sqler will break the request and return back the client with the error occurred.
// each authorizer has a method and a url.
// this only used within `RESTful` context.
authorizers = ["GET http://web.hook/api/authorize", "GET http://web.hook/api/allowed?roles=admin,root,super_admin"]
// the validation rules
// you can specify separated rules for each request method!
rules {
user_name = ["required"]
user_email = ["required", "email"]
user_password = ["required", "stringlength: 5,50"]
}
// the query to be executed
exec = <<SQL
{{ template "_boot" }}
/* let's bind a vars to be used within our internal prepared statement */
{{ .BindVar "name" .Input.user_name }}
{{ .BindVar "email" .Input.user_email }}
{{ .BindVar "emailx" .Input.user_email }}
INSERT INTO users(name, email, password, time) VALUES(
/* we added it above */
:name,
/* we added it above */
:email,
/* it will be secured anyway because it is encoded */
'{{ .Input.user_password | .Hash "bcrypt" }}',
/* generate a unix timestamp "seconds" */
{{ .UnixTime }}
);
SELECT * FROM users WHERE id = LAST_INSERT_ID();
SQL
}
// list all databases, and run a transformer function
databases {
exec = "SHOW DATABASES"
transformer = <<JS
// there is a global variable called `$result`,
// `$result` holds the result of the sql execution.
(function(){
newResult = []
for ( i in $result ) {
newResult.push($result[i].Database)
}
return newResult
})()
JS
}
支持的SQL引擎
- sqlite3
- mysql
- postgresql
- cockroachdb
- sqlserver
支持的 Util
.Hash <method>
- 使用指定的方法[md5,sha1,sha256,sha512,bcrypt]散列指定的输入,{{ "data" | .Hash "md5" }}
;·.UnixTime
- 以秒为单位返回unit时间,{{ .UnixTime }}
;.UnixNanoTime
- 以纳秒为单位返回unix时间,{{ .UnixNanoTime }}
;.Uniqid
- 返回唯一ID,{{ .Uniqid }}
。
协议
SQLer遵循 Apache 2.0协议。