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/
redirect.go
63 lines (59 loc) · 1.56 KB
/
redirect.go
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package main
import (
"bytes"
"fmt"
"html/template"
"net/http"
"strings"
)
var tmpl = template.Must(template.New("main").Parse(`<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<meta name="go-import" content="{{.ImportRoot}} {{.VCS}} {{.VCSRoot}}">
<meta name="go-source" content="{{.ImportRoot}} {{.VCSRoot}} {{.VCSRoot}}/tree/master{/dir} {{.VCSRoot}}/blob/master{/dir}/{file}#L{line}">
<meta http-equiv="refresh" content="0; url=https://godoc.org/{{.ImportRoot}}{{.Suffix}}">
</head>
<body>
Redirecting to docs at <a href="https://godoc.org/{{.ImportRoot}}{{.Suffix}}">godoc.org/{{.ImportRoot}}{{.Suffix}}</a>...
</body>
</html>
`))
type data struct {
ImportRoot string
VCS string
VCSRoot string
Suffix string
}
func redirect(w http.ResponseWriter, req *http.Request) {
path := strings.TrimSuffix(req.Host+req.URL.Path, "/")
var importRoot, repoRoot, suffix string
if path == importPath {
http.Redirect(w, req, "https://godoc.org/"+importPath, 302)
return
}
fmt.Println(path, importPath)
if !strings.HasPrefix(path, importPath+"/") {
http.NotFound(w, req)
return
}
elem := path[len(importPath)+1:]
if i := strings.Index(elem, "/"); i >= 0 {
elem, suffix = elem[:i], elem[i:]
}
importRoot = importPath + "/" + elem
repoRoot = repoPath + "/" + elem
d := &data{
ImportRoot: importRoot,
VCS: "git",
VCSRoot: repoRoot,
Suffix: suffix,
}
var buf bytes.Buffer
err := tmpl.Execute(&buf, d)
if err != nil {
http.Error(w, err.Error(), 500)
return
}
w.Write(buf.Bytes())
}