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// Copyright (c) 2019, Grégoire Duchêne <gduchene@awhk.org>
//
// Use of this source code is governed by the ISC license that can be
// found in the LICENSE file.
// +build linux
package main
import (
"context"
"fmt"
"github.com/aws/aws-lambda-go/events"
"github.com/aws/aws-lambda-go/lambda"
"os"
"path"
"strings"
)
func getDest(dest, repo string) string {
dest = strings.TrimRight(dest, "/")
return fmt.Sprintf("%s/%s", dest, repo)
}
func getRepo(pkg, prefix string) string {
prefix = strings.TrimRight(prefix, "/")
path := strings.TrimLeft(strings.TrimPrefix(pkg, prefix), "/")
return strings.Split(path, "/")[0]
}
func redirect(ctx context.Context, req events.APIGatewayProxyRequest) (events.APIGatewayProxyResponse, error) {
var (
pkg = path.Join(req.Headers["Host"], req.Path)
dest = getDest(os.Getenv("DEST"), getRepo(pkg, os.Getenv("PREFIX")))
doc = fmt.Sprintf("https://godoc.org/%s", pkg)
vcs = os.Getenv("VCS")
body = fmt.Sprintf(`<!doctype html>
<meta name="go-import" content="%s %s %s">
<title>go-import-redirect</title>
`, pkg, vcs, dest)
resp = events.APIGatewayProxyResponse{
Body: body,
Headers: map[string]string{"Content-Type": "text/html; charset=utf-8"},
}
)
if v, ok := req.QueryStringParameters["go-get"]; ok && v == "1" {
resp.StatusCode = 200
} else {
resp.Headers["Location"] = doc
resp.StatusCode = 302
}
return resp, nil
}
func main() {
lambda.Start(redirect)
}
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