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// SPDX-FileCopyrightText: © 2019 Grégoire Duchêne <gduchene@awhk.org>
// SPDX-License-Identifier: ISC
package main
import (
_ "embed"
"log"
"net/http"
"path"
"regexp"
"text/template"
)
var (
body = template.Must(template.New("").Parse(tmpl))
//go:embed resp.html
tmpl string
)
type bodyData struct{ Package, Repository, VCS string }
type redirector struct {
re *regexp.Regexp
repl string
vcs string
}
func (h *redirector) ServeHTTP(w http.ResponseWriter, req *http.Request) {
if req.Method != http.MethodGet {
w.Header().Set("Allow", http.MethodGet)
w.WriteHeader(http.StatusMethodNotAllowed)
return
}
pkg := path.Join(req.Host, req.URL.Path)
if req.URL.Query().Get("go-get") != "1" {
w.Header().Set("Location", "https://pkg.go.dev/"+pkg)
w.WriteHeader(http.StatusFound)
return
}
dest := h.re.ReplaceAllString(pkg, h.repl)
w.Header().Set("Content-Type", "text/html; charset=utf-8")
w.WriteHeader(http.StatusOK)
if err := body.Execute(w, bodyData{pkg, dest, h.vcs}); err != nil {
log.Println(err)
}
}
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