redirect from goproxy.io

[Derek]

I run a local goproxy at my server: goproxy -proxy=https://goproxy.io .

I created a golang test project, and set my $GOPROXY=mygoproxyweb, sine I run go build , I encountered a 302 redirect response from my goproxy:
Location https://goproxy.someimg.com/github.com/gin-gonic/gin/@v/v1.5.0.zip
It's very strange, I didn't find any string "someimg.com" in the goproxy code.

Is it a feature of product enviroment https://goproxy.io ?

I changed the upstream proxy to gocenter.io, It works well.
goproxy -proxy=https://gocenter.io .

[Aofei Sheng]

Sorry, I didn't understand what you meant. It looks like you're not using this project. This project is a minimalist Go module proxy handler, not a binary file you can use directly. Maybe you asked the wrong project?

[Derek]

I built this project and got a executable binary file goproxy. I think you are Chinese, here the Chinese:

我从这个项目编译了一个可执行文件。在服务器上运行：goproxy -proxy=https://goproxy.io
本地内网开发环境设置了$GOPROXY=mygoproxyweb
然后本地创建了一个测试golang项目，import 了github.com/gin-gonic/gin

本地go build时，mygoproxyweb 却返回了302响应（内网无法访问goproxy.someimg.com）：
Location https://goproxy.someimg.com/github.com/gin-gonic/gin/@v/v1.5.0.zip

经测试：
本地访问 https://mygoproxyweb/github.com/gin-gonic/gin/@v/v1.5.0.zip 会被redirect 到goproxy.someimg.com
互联网访问 https://goproxy.io/github.com/gin-gonic/gin/@v/v1.5.0.zip 也会被redirect 到goproxy.someimg.com

我在https://github.com/goproxy/goproxy 源代码里没有找到 someimg.com . 难道这个是https://goproxy.io 的功能，并没有在代码里面？

[Derek]

$ curl -v https://goproxy.io/github.com/gin-gonic/gin/@v/v1.5.0.zip
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0* Trying 119.28.201.50:443...

• TCP_NODELAY set
• Connected to goproxy.io (119.28.201.50) port 443 (#0)
• ALPN, offering h2
• ALPN, offering http/1.1
  ...........................(ssl)
• Using HTTP2, server supports multi-use
• Connection state changed (HTTP/2 confirmed)
• Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0
  } [5 bytes data]
• Using Stream ID: 1 (easy handle 0xe41300)
  } [5 bytes data]

GET /github.com/gin-gonic/gin/@v/v1.5.0.zip HTTP/2
Host: goproxy.io
user-agent: curl/7.68.0
accept: /

{ [5 bytes data]

• Connection state changed (MAX_CONCURRENT_STREAMS == 128)!
  } [5 bytes data]
  < HTTP/2 302
  < server: nginx/1.16.1
  < date: Thu, 12 Mar 2020 11:27:26 GMT
  < content-type: text/html; charset=utf-8
  < content-length: 89
  < location: https://goproxy.someimg.com/github.com/gin-gonic/gin/@v/v1.5.0.zip
  <
  { [89 bytes data]
  100 89 100 89 0 0 640 0 --:--:-- --:--:-- --:--:-- 644Found.

• Connection #0 to host goproxy.io left intact

[Aofei Sheng]

你确定你在使用这个项目嘛？这个项目跟 goproxy.io 是无关的哦，如果你发现访问某些东西被 302 了那说明是他们的表现既如此，跟你具体怎么用是无关的。你也可以试试用 goproxy.cn 做上游，是不会出现任何 302 行为的。

[Aofei Sheng]

此外，当前这个项目的使用方式是写代码哦：

package main

import (
	"net/http"

	"github.com/goproxy/goproxy"
)

func main() {
	http.ListenAndServe("localhost:8080", goproxy.New())
}

而不是编译，这个项目是一个可引入的三方库。

[Derek]

ok~ 我试一下