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
|
package main
import (
"encoding/json"
"fmt"
"net"
"net/http"
"regexp"
"strings"
"time"
)
const log_length = 100
type accessLog struct {
ClientAddr string `json:"clientAddr"`
RequestedPath string `json:"requestedPath"`
RequestTime time.Time `json:"requestTime"`
HttpMethod string `json:"httpMethod"`
}
func main() {
fs := http.FileServer(http.Dir("static"))
var logs [log_length]string
n := 0
// Define a handler function for the root path
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
jsonData, _ := json.Marshal(accessLog{
ClientAddr: RedactIP(r.RemoteAddr),
RequestedPath: r.URL.Path,
RequestTime: time.Now().UTC(),
HttpMethod: r.Method,
})
addRotLog(&logs, &n, fmt.Sprintf("%s", string(jsonData)))
// Serve the index.html file from the static directory
http.StripPrefix("/", fs).ServeHTTP(w, r)
})
http.HandleFunc("/logs", createGetLogs(&logs))
http.HandleFunc("/foo", func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "foo!")
})
// Start the server on port 8080
fmt.Println("Server is listening on port 8080...")
err := http.ListenAndServe(":8080", nil)
if err != nil {
fmt.Printf("Error starting server: %s\n", err)
}
}
func createGetLogs(logs *[log_length]string) func(http.ResponseWriter, *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
for _, s := range logs {
fmt.Fprintln(w, s)
}
}
}
func addRotLog(logs *[log_length]string, last *int, value string) {
if strings.Contains(value, "\n") {
for _, v := range strings.Split(value, "\n") {
addRotLog(logs, last, v)
}
} else {
if *last == log_length {
for i := 0; i < log_length-1; i++ {
logs[i] = logs[i+1]
}
logs[log_length-1] = value
} else {
logs[*last] = value
*last++
}
}
}
// RedactIP partially redacts an IP address by replacing the last octet with 'xxx'
func RedactIP(input string) string {
ipRegex := `\b(?:\d{1,3}\.){3}\d{1,3}\b`
re := regexp.MustCompile(ipRegex)
return re.ReplaceAllStringFunc(input, func(match string) string {
if ip := net.ParseIP(match); ip != nil {
parts := strings.Split(match, ".")
if len(parts) == 4 {
parts[3] = "XXX"
return strings.Join(parts, ".")
}
}
return match
})
}
|
