如何在 go-chi 中启用 gzip 压缩中间件

Question

如何使用 go-chi 框架的 gzip 中间件启用 gzip 压缩？

尝试使用此处显示的示例：

https://github.com/go-chi/chi/issues/204

但是当我用 curl 检查时，我得到了这个：

$ curl -H "Accept-Encoding: gzip" -I http://127.0.0.1:3333
HTTP/1.1 405 Method Not Allowed
Date: Sat, 31 Aug 2019 19:06:39 GMT

我尝试了代码“hello world”：

package main

import (
    "net/http"

    "github.com/go-chi/chi"
    "github.com/go-chi/chi/middleware"
)

func main() {
    r := chi.NewRouter()
    r.Use(middleware.RequestID)
    r.Use(middleware.Logger)
    //r.Use(middleware.DefaultCompress) //using this produces the same result
    r.Use(middleware.Compress(5, "gzip"))
    r.Get("/", Hello)
    http.ListenAndServe(":3333", r)
}

func Hello(w http.ResponseWriter, r *http.Request){
    w.Header().Set("Content-Type", "text/html") //according to the documentation this must be here to enable gzip
    w.Write([]byte("hello world\n"))
}

但是当我尝试用 curl 验证时，结果是一样的

$ curl -H "Accept-Encoding: gzip" -I http://127.0.0.1:3333
HTTP/1.1 405 Method Not Allowed
Date: Sat, 31 Aug 2019 19:06:39 GMT

发生了什么事？

Answer 1

其他答案现在已经过时了。我必须自己解决这个问题，所以我发现了什么。

你的错误在这里：

r.Use(middleware.Compress(5, "gzip"))

第二个参数（“类型”）是指将应用压缩的内容类型。例如："text/html"、"application/json"等

只需添加要压缩的内容类型列表，或完全删除参数：

func main() {
    r := chi.NewRouter()
    r.Use(middleware.RequestID)
    r.Use(middleware.Logger)
    r.Use(middleware.Compress(5))
    r.Get("/", Hello)
    http.ListenAndServe(":3333", r)
}

这将压缩来自middleware.Compress的默认列表中定义的所有内容类型：

var defaultCompressibleContentTypes = []string{
    "text/html",
    "text/css",
    "text/plain",
    "text/javascript",
    "application/javascript",
    "application/x-javascript",
    "application/json",
    "application/atom+xml",
    "application/rss+xml",
    "image/svg+xml",
}

祝你好运！

Answer 2

r.Use(middleware.DefaultCompress) 现已标记为DEPRECATED。

要启用压缩，您需要创建一个压缩器，并使用它的处理程序。

r := chi.NewRouter()
r.Use(middleware.RequestID)
r.Use(middleware.Logger)

compressor := middleware.NewCompressor(flate.DefaultCompression)
r.Use(compressor.Handler())

r.Get("/", Hello)
http.ListenAndServe(":3333", r)

flate 包必须导入为compress/flate。

Answer 3

使用已注释的middleware.DefaultCompress 和普通的GET 请求。

package main

import (
    "net/http"

    "github.com/go-chi/chi"
    "github.com/go-chi/chi/middleware"
)

func main() {
    r := chi.NewRouter()
    r.Use(middleware.RequestID)
    r.Use(middleware.Logger)
    r.Use(middleware.DefaultCompress)
    r.Get("/", Hello)
    http.ListenAndServe(":3333", r)
}

func Hello(w http.ResponseWriter, r *http.Request) {
    w.Header().Set("Content-Type", "text/html")
    w.Write([]byte("hello world\n"))
}

试试curl:

$ curl -v http://localhost:3333 --compressed
* Rebuilt URL to: http://localhost:3333/
*   Trying 127.0.0.1...
* TCP_NODELAY set
* Connected to localhost (127.0.0.1) port 3333 (#0)
> GET / HTTP/1.1
> Host: localhost:3333
> User-Agent: curl/7.58.0
> Accept: */*
> Accept-Encoding: deflate, gzip
>
< HTTP/1.1 200 OK
< Content-Encoding: gzip
< Content-Type: text/html
< Date: Sat, 31 Aug 2019 23:37:52 GMT
< Content-Length: 36
<
hello world
* Connection #0 to host localhost left intact

或HTTPie:

$ http :3333
HTTP/1.1 200 OK
Content-Encoding: gzip
Content-Length: 36
Content-Type: text/html
Date: Sat, 31 Aug 2019 23:38:31 GMT

hello world