Tollbooth —— Go 语言的 HTTP 限速中间件

Tollbooth 是一个用 Go 语言编写的用来限制 HTTP 访问速度的中间件，可用来限制每个 HTTP 请求的传输速率。例如你可以不限制 / 的访问速率，但是可以针对 /login 限制每个 IP 每秒最多 POST 多少个请求。

Go 程序中使用的方法：

package main

import (
    "github.com/didip/tollbooth"
    "net/http"
    "time"
)

func HelloHandler(w http.ResponseWriter, req *http.Request) {
    w.Write([]byte("Hello, World!"))
}

func main() {
    // You can create a generic limiter for all your handlers
    // or one for each handler. Your choice.
    // This limiter basically says: allow at most 1 request per 1 second.
    limiter := tollbooth.NewLimiter(1, time.Second)

    // This is an example on how to limit only GET and POST requests.
    limiter.Methods = []string{"GET", "POST"}

    // You can also limit by specific request headers, containing certain values.
    // Typically, you prefetched these values from the database.
    limiter.Headers = make(map[string][]string)
    limiter.Headers["X-Access-Token"] = []string{"abc123", "xyz098"}

    // And finally, you can limit access based on basic auth usernames.
    // Typically, you prefetched these values from the database as well.
    limiter.BasicAuthUsers = []string{"bob", "joe", "didip"}

    // Example on how to wrap your request handler.
    http.Handle("/", tollbooth.LimitFuncHandler(limiter, HelloHandler))
    http.ListenAndServe(":12345", nil)

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