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无法修改 HTTPS 的 Host #58

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117503445 opened this issue Aug 31, 2023 · 2 comments
Closed

无法修改 HTTPS 的 Host #58

117503445 opened this issue Aug 31, 2023 · 2 comments
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bug Something isn't working enhancement New feature or request

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@117503445
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希望实现的效果: 在发出请求前修改 Host

比如下面的 Demo

package main

import (
	"regexp"
	"strconv"
	"strings"

	"github.com/lqqyt2423/go-mitmproxy/proxy"
	log "github.com/sirupsen/logrus"
)

type RewriteHost struct {
	proxy.BaseAddon
}

var titleRegexp1 = regexp.MustCompile("(<TITLE>)(.*?)(</TITLE>)")
var titleRegexp2 = regexp.MustCompile("(<title>)(.*?)(</title>)")

func (a *RewriteHost) Request(f *proxy.Flow) {
	f.Request.URL.Host = "google.com"
}

func (a *RewriteHost) Response(f *proxy.Flow) {
	contentType := f.Response.Header.Get("Content-Type")
	if !strings.Contains(contentType, "text/html") {
		return
	}

	// change html <title> end with: " - hack by go-mitmproxy"
	f.Response.ReplaceToDecodedBody()
	f.Response.Body = titleRegexp1.ReplaceAll(f.Response.Body, []byte("${1}${2} - hack by go-mitmproxy ${3}"))
	f.Response.Body = titleRegexp2.ReplaceAll(f.Response.Body, []byte("${1}${2} - hack by go-mitmproxy ${3}"))
	f.Response.Header.Set("Content-Length", strconv.Itoa(len(f.Response.Body)))
}

func main() {
	opts := &proxy.Options{
		Addr:              ":8000",
		StreamLargeBodies: 1024 * 1024 * 5,
		// SslInsecure:       true,
	}

	p, err := proxy.NewProxy(opts)
	if err != nil {
		log.Fatal(err)
	}

	p.AddAddon(&RewriteHost{})

	log.Fatal(p.Start())
}

运行命令 http_proxy=http://localhost:8000 curl http://baidu.com 返回

<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
<TITLE>301 Moved - hack by go-mitmproxy </TITLE></HEAD><BODY>
<H1>301 Moved</H1>
The document has moved
<A HREF="http://www.google.com/">here</A>.
</BODY></HTML>

可以看到 Host 已经被修改为 google.com 了，并且返回的 HTML 也被修改了。这是预期的行为。

但是运行命令 https_proxy=http://localhost:8000 curl https://baidu.com 返回

<html>
<head><title>405 Not Allowed - hack by go-mitmproxy </title></head>
<body bgcolor="white">
<center><h1>405 Not Allowed</h1></center>
<hr><center>bfe/1.0.8.18</center>
</body>
</html>

分析返回体可以发现，返回 HTML 的 Title 被成功修改了，但是返回的 HTML 仍然是由 baidu 返回的，所以说 Host 修改失败了。
@lqqyt2423 lqqyt2423 added bug Something isn't working enhancement New feature or request labels Sep 1, 2023
@lqqyt2423
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https://github.com/lqqyt2423/go-mitmproxy/releases/tag/v1.7.1
https://github.com/lqqyt2423/go-mitmproxy/blob/main/examples/rewrite-host/main.go

@117503445
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谢啦：）

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@lqqyt2423 @117503445