From e769bcd3e1ee2583366b53351ef090de2136e637 Mon Sep 17 00:00:00 2001
From: Adphi <philippe.adrien.nousse@gmail.com>
Date: Sat, 21 Nov 2020 21:45:39 +0100
Subject: [PATCH] proxy repo files

---
 handler.go | 38 +++++++++++++++++++++++++++++++++++++-
 module.go  |  3 +++
 2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/handler.go b/handler.go
index dd208b1..dcb1a75 100644
--- a/handler.go
+++ b/handler.go
@@ -1,8 +1,14 @@
 package main
 
 import (
+	"bytes"
+	"io"
 	"net/http"
+	url2 "net/url"
 	"path"
+	"strings"
+
+	"github.com/sirupsen/logrus"
 )
 
 func modulesHandler(w http.ResponseWriter, r *http.Request) {
@@ -19,14 +25,44 @@ func modulesHandler(w http.ResponseWriter, r *http.Request) {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 		}
 	default:
-		m, ok := modules.Find(path.Base(r.URL.Path))
+		mPath := strings.Split(r.URL.Path, "/")[1]
+		m, ok := modules.Find(path.Base(mPath))
 		if !ok {
 			w.WriteHeader(http.StatusNotFound)
 			return
 		}
+		if parts := strings.Split(r.URL.Path, "/"); len(parts) > 2  && parts[2] != ""{
+			url, err := url2.ParseRequestURI(m.Readme)
+			if err != nil {
+				logrus.Errorf("parse readme url: %v", err)
+				w.WriteHeader(http.StatusNotFound)
+				return
+			}
+			baseParts := strings.Split(url.Path, "/")
+			url.Path = strings.Join(baseParts[:len(baseParts)-1], "/") + "/" + strings.Join(parts[2:], "/")
+			res, err := http.Get(url.String())
+			if err != nil {
+				w.WriteHeader(http.StatusInternalServerError)
+				return
+			}
+			w.WriteHeader(res.StatusCode)
+			copy(w, res)
+			return
+		}
+		if !strings.HasSuffix(r.URL.Path, "/") {
+			http.Redirect(w, r, r.URL.Path+"/", http.StatusSeeOther)
+			return
+		}
 		w.Header().Set("content-type", "text/html")
 		if err := moduleTemplate.Execute(w, m); err != nil {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 		}
 	}
 }
+
+func copy(w http.ResponseWriter, res *http.Response) {
+	defer res.Body.Close()
+	buf := &bytes.Buffer{}
+	io.Copy(buf, res.Body)
+	w.Write(buf.Bytes())
+}
diff --git a/module.go b/module.go
index d71baf2..d01e544 100644
--- a/module.go
+++ b/module.go
@@ -70,6 +70,9 @@ func NewModules(path string) (Modules, error) {
 type Modules []*Module
 
 func (m *Modules) Find(name string) (*Module, bool) {
+	if parts := strings.Split(name, "/"); len(parts) > 1 {
+		name = parts[0]
+	}
 	for _, v := range *m {
 		mod := path.Base(v.Import)
 		if mod == name {