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
|
package main
import (
"bytes"
"crypto/sha1"
"encoding/base64"
"fmt"
"io"
"net/http"
"strings"
"text/template"
"src.userspace.com.au/sws"
)
const (
endpoint = "//stats.userspace.com.au/sws.gif"
gif = "R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7"
)
func handleHits(db sws.HitStore) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
return
}
}
func handleHitCounter(db sws.CounterStore) http.HandlerFunc {
gifBytes, err := base64.StdEncoding.DecodeString(gif)
if err != nil {
panic(err)
}
return func(w http.ResponseWriter, r *http.Request) {
hit, err := sws.HitFromRequest(r)
if err != nil {
log("failed to extract hit", err)
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
site, err := db.GetSiteByName(hit.Host)
if err != nil {
log("failed to get site", err)
http.Error(w, "invalid site", http.StatusNotFound)
return
}
hit.SiteID = site.ID
hit.Addr = r.RemoteAddr
if err := db.SaveHit(hit); err != nil {
log("failed to save hit", err)
//http.Error(w, err.Error(), http.StatusInternalServerError)
//return
}
// TODO restrict to site sites
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("Content-Type", "image/gif")
w.Write(gifBytes)
return
}
}
func handleCounter(addr string) http.HandlerFunc {
tmpl, err := template.New("counter").Parse(counter)
if err != nil || tmpl == nil {
panic(err)
}
data := map[string]string{"endpoint": endpoint}
var buf bytes.Buffer
if err := tmpl.Execute(&buf, data); err != nil {
panic(err)
}
etag := fmt.Sprintf(`"%x"`, sha1.Sum(buf.Bytes()))
return func(w http.ResponseWriter, r *http.Request) {
if match := r.Header.Get("If-None-Match"); match != "" {
if strings.Contains(match, etag) {
w.WriteHeader(http.StatusNotModified)
return
}
}
// TODO restrict to site sites
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("Etag", etag)
w.Header().Set("Cache-Control", "public")
w.Header().Set("Content-Type", "application/javascript")
if _, err := io.Copy(w, &buf); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
}
}
|
