HTTPS Listener For HTTP Redirect

这个 mod 通过劫持 net.Conn 实现了一个功能:
当用户使用 http 协议访问 https 端口时，服务器返回302重定向。
改编自 net/http 。

This mod implements a feature by hijacking net.Conn :
If a user accesses an https port using http, the server returns 302 redirection.
Adapted from net/http .

Related Issue:
net/http: configurable error message for Client sent an HTTP request to an HTTPS server. #49310

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Get

go get github.com/bddjr/hlfhr

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Logic

HTTPS Server Start -> Hijacking net.Listener.Accept

Client HTTPS -> Accept hijacking net.Conn.Read -> Not looks like HTTP -> ✅Continue...

Client HTTP/1.1 -> Accept hijacking net.Conn.Read -> Looks like HTTP -> 🔄302 Redirect.

Client HTTP/??? -> Accept hijacking net.Conn.Read -> Looks like HTTP -> Missing Host header -> ❌400 Script.

See request

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Example

See example/main.go

Example:

var srv *hlfhr.Server

func main() {
	srv = hlfhr.New(&http.Server{
		Addr:              ":5678",
		Handler:           http.HandlerFunc(httpResponseHandle),
		ReadHeaderTimeout: 10 * time.Second,
		IdleTimeout:       10 * time.Second,
	})
	// Then just use it like http.Server .

	err := srv.ListenAndServeTLS("localhost.crt", "localhost.key")
	fmt.Println(err)
}

Run:

git clone https://github.com/bddjr/hlfhr
cd hlfhr
cd example

go build
./example

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Option Example

Hlfhr_ReadFirstRequestBytesLen

srv.Hlfhr_ReadFirstRequestBytesLen = 4096

Hlfhr_HttpOnHttpsPortErrorHandler

srv.Hlfhr_HttpOnHttpsPortErrorHandler = func(rb []byte, conn net.Conn) {
	resp := hlfhr.NewResponse(conn)
	// 302 Found
	if host, path, ok := hlfhr.ReadReqHostPath(rb); ok {
		resp.Redirect(302, fmt.Sprint("https://", host, path))
		return
	}
	// script
	resp.ScriptRedirect()
}

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Feature Example

New

srv := hlfhr.New(&http.Server{})

NewServer

srv := hlfhr.NewServer(&http.Server{})

ReadReqHostPath

var rb []byte
host, path, ok := hlfhr.ReadReqHostPath(rb)

ReadReq

var rb []byte
req, err := hlfhr.ReadReq(rb)

NewResponse

var conn net.Conn
resp := hlfhr.NewResponse(conn)

Response.SetContentType

var resp *hlfhr.Response
resp.SetContentType("text/html")

Response.Write

var resp *hlfhr.Response
resp.Write(
	"Hello world!\n",
	"Hello hlfhr!\n",
)

Response.Redirect

var resp *hlfhr.Response
resp.Redirect(302, "https://example.com")

Response.ScriptRedirect

var resp *hlfhr.Response
resp.ScriptRedirect()

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License

BSD-3-clause license