-
-
Notifications
You must be signed in to change notification settings - Fork 11
/
server.go
131 lines (115 loc) · 3.35 KB
/
server.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
// Copyright 2021 Changkun Ou. All rights reserved.
// Use of this source code is governed by a MIT
// license that can be found in the LICENSE file.
package main
import (
"context"
"embed"
"html/template"
"io/fs"
"log"
"net/http"
"strings"
"changkun.de/x/redir/internal/cache"
"changkun.de/x/redir/internal/config"
"changkun.de/x/redir/internal/db"
"changkun.de/x/redir/internal/models"
"changkun.de/x/redir/internal/utils"
)
type server struct {
db *db.Store
cache *cache.LRU
}
var (
//go:embed templates/x.html
xtmpl string
//go:embed templates/wait.html
wtmpl string
//go:embed dashboard/build/index.html
dtmpl string
//go:embed dashboard/build/static/*
sasse embed.FS
)
var (
xTmpl *template.Template
wTmpl *template.Template
dTmpl *template.Template
statics fs.FS
)
func init() {
// We are not allow to use any additional routers.
// Replace all /static files to ./.static folder.
dtmpl = strings.Replace(dtmpl, "/static", "./.static", -1)
}
func newServer(ctx context.Context) *server {
xTmpl = template.Must(template.New("xtmpl").Parse(xtmpl))
wTmpl = template.Must(template.New("wtmpl").Parse(wtmpl))
dTmpl = template.Must(template.New("stmpl").Parse(dtmpl))
var err error
statics, err = fs.Sub(sasse, "dashboard/build/static")
if err != nil {
log.Fatalf("cannot access sub file system: %v", err)
}
db, err := db.NewStore(context.Background(), config.Conf.Store)
if err != nil {
log.Fatalf("cannot establish connection to database: %v", err)
}
return &server{db: db, cache: cache.NewLRU(true)}
}
func (s *server) close() {
log.Println(s.db.Close())
}
func (s *server) registerHandler() {
l := utils.Logging()
// semantic shortener (default)
log.Println("router /s is enabled.")
http.Handle(config.Conf.S.Prefix, l(s.shortHandler(models.KindShort)))
// random shortener
if config.Conf.R.Enable {
log.Println("router /r is enabled.")
http.Handle(config.Conf.R.Prefix, l(s.shortHandler(models.KindRandom)))
}
// repo redirector
if config.Conf.X.Enable {
log.Println("router /x is enabled.")
http.Handle(config.Conf.X.Prefix, l(s.xHandler()))
}
}
// xHandler redirect returns an HTTP handler that redirects requests for
// the tree rooted at importPath to pkg.go.dev pages for those import paths.
// The redirections include headers directing `go get.` to satisfy the
// imports by checking out code from repoPath using the configured VCS.
func (s *server) xHandler() http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
importPath := strings.TrimSuffix(req.Host+config.Conf.X.Prefix, "/")
path := strings.TrimSuffix(req.Host+req.URL.Path, "/")
var importRoot, repoRoot, suffix string
if path == importPath {
http.Redirect(w, req, config.Conf.X.GoDocHost+importPath, http.StatusFound)
return
}
elem := path[len(importPath)+1:]
if i := strings.Index(elem, "/"); i >= 0 {
elem, suffix = elem[:i], elem[i:]
}
importRoot = importPath + "/" + elem
repoRoot = config.Conf.X.RepoPath + "/" + elem
d := &struct {
ImportRoot string
VCS string
VCSRoot string
Suffix string
}{
ImportRoot: importRoot,
VCS: config.Conf.X.VCS,
VCSRoot: repoRoot,
Suffix: suffix,
}
w.Header().Set("Cache-Control", "public, max-age=300")
err := xTmpl.Execute(w, d)
if err != nil {
http.Error(w, err.Error(), 500)
return
}
})
}