ExpVar

  少于1分钟  

原文： https://docs.gofiber.io/api/middleware/expvar

ExpVar

Expvar middleware for Fiber that serves via its HTTP server runtime exposed variants in the JSON format. The package is typically only imported for the side effect of registering its HTTP handlers. The handled path is /debug/vars.

​ 适用于 Fiber 的 Expvar 中间件，通过其 HTTP 服务器运行时以 JSON 格式提供公开的变量。通常仅导入该软件包以注册其 HTTP 处理程序。处理的路径是 /debug/vars 。

Signatures 签名

1

func New() fiber.Handler

Examples 示例

Import the middleware package that is part of the Fiber web framework

​ 导入 Fiber Web 框架的一部分中间件包

1
2
3
4

import (
  "github.com/gofiber/fiber/v2"
  expvarmw "github.com/gofiber/fiber/v2/middleware/expvar"
)

After you initiate your Fiber app, you can use the following possibilities:

​ 在启动 Fiber 应用后，您可以使用以下可能性：

1
2
3
4
5
6
7
8

var count = expvar.NewInt("count")

app.Use(expvarmw.New())
app.Get("/", func(c *fiber.Ctx) error {
    count.Add(1)

    return c.SendString(fmt.Sprintf("hello expvar count %d", count.Value()))
})

Visit path /debug/vars to see all vars and use query r=key to filter exposed variables.

​ 访问路径 /debug/vars 以查看所有变量并使用查询 r=key 过滤公开的变量。

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17

curl 127.0.0.1:3000
hello expvar count 1

curl 127.0.0.1:3000/debug/vars
{
    "cmdline": ["xxx"],
    "count": 1,
    "expvarHandlerCalls": 33,
    "expvarRegexpErrors": 0,
    "memstats": {...}
}

curl 127.0.0.1:3000/debug/vars?r=c
{
    "cmdline": ["xxx"],
    "count": 1
}

Config 配置

Property 属性Type 输入Description 说明Default 默认
Next 下一步func(*fiber.Ctx) boolNext defines a function to skip this middleware when returned true. 接下来定义一个函数，在返回 true 时跳过此中间件。nil

Default Config 默认配置

1
2
3

var ConfigDefault = Config{
    Next: nil,
}
最后修改 October 10, 2024: 更新 (a4b8f85)