goproxy redirect http proxy to transparent proxy cause some http quest 400 error

[aries]

basic network
v2raya basic proxy mode， socks5 proxy port : 20170 , http proxy port :20171
goroxy command line : ./proxy sps --redir -p :8080 -P socks5://127.0.0.1:20170
iptables redirect the traffic based on dest ip address
ipv4/ipv6 dual stack

goproxy version: free_13.0

400 error request example:
http://ds.v6ns.vm3.test-ipv6.com/ip/?callback=_jqjsp&testdomain=test-ipv6.com&testname=test_v6ns

linux-router->root:~# curl -v "http://ds.v6ns.vm3.test-ipv6.com/ip/?callback=_jqjsp&testdomain=test-ipv6.com&testname=test_v6ns"

• Trying 2001:470:1:18::115:80...
• Connected to ds.v6ns.vm3.test-ipv6.com (2001:470:1:18::115) port 80 (#0)

GET /ip/?callback=_jqjsp&testdomain=test-ipv6.com&testname=test_v6ns HTTP/1.1
Host: ds.v6ns.vm3.test-ipv6.com
User-Agent: curl/7.81.0
Accept: /

• Mark bundle as not supporting multiuse
  < HTTP/1.1 400 Bad Request
  < Connection: close
  < Proxy-Connection: close
  < Content-Length: 0
  <
• Closing connection 0

isseue detail：
1 when goproxy redirect http proxy 20171 and using iptable , it get 400 error
2 when goproxy redirect socks5 proxy 20170 and using iptables , it's ok
3 when using the http proxy in broswer instead of using iptables , it's ok

[Aofei Sheng]

不好意思，你大概找错了项目，这个项目是针对 Go module proxy 的。