-
Notifications
You must be signed in to change notification settings - Fork 0
/
ipcamproxy.go
84 lines (66 loc) · 1.41 KB
/
ipcamproxy.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
package main
import (
"fmt"
"io/ioutil"
"log"
"net"
"net/http"
"net/url"
"os"
"time"
)
var arg string
var debug string
var lastUpdated time.Time
var image []byte
func main() {
if len(os.Args) > 2 {
arg = os.Args[1]
debug = os.Args[2]
} else {
log.Println("2 arguments required: URL, debug(true or false)")
os.Exit(1)
}
url, err := url.Parse(os.Args[1])
if err != nil {
log.Fatal(err)
}
if debug == "true" {
log.Println("Debug mode - server will run until first request is received")
}
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
diff := time.Now().Sub(lastUpdated)
if diff > (time.Duration(10)*time.Second) && isUp(url.Hostname(), url.Port()) {
var err error
image, err = downloadFromURL(arg)
if err != nil {
}
fmt.Fprint(w, string(image))
} else {
fmt.Fprint(w, string(image))
}
if debug == "true" {
os.Exit(0)
}
})
http.ListenAndServe(":9000", nil)
}
func isUp(hostname string, port string) bool {
conn, err := net.DialTimeout("tcp", hostname+":"+port, time.Duration(1)*time.Second)
if err != nil {
return false
}
conn.Close()
return true
}
func downloadFromURL(url string) ([]byte, error) {
response, err := http.Get(url)
if err != nil {
log.Println("Error while downloading", url, "-", err)
return nil, err
}
defer response.Body.Close()
bs, err := ioutil.ReadAll(response.Body)
lastUpdated = time.Now()
return bs, nil
}