|
1
|
|
|
package main |
|
2
|
|
|
|
|
3
|
|
|
import ( |
|
4
|
|
|
"errors" |
|
5
|
|
|
"net" |
|
6
|
|
|
"net/url" |
|
7
|
|
|
"os" |
|
8
|
|
|
"os/user" |
|
9
|
|
|
"path/filepath" |
|
10
|
|
|
"strings" |
|
11
|
|
|
|
|
12
|
|
|
"github.com/mattn/go-isatty" |
|
13
|
|
|
) |
|
14
|
|
|
|
|
15
|
|
|
// FatalCheck panics if err is not nil. |
|
16
|
|
|
func FatalCheck(err error) { |
|
17
|
|
|
if err != nil { |
|
18
|
|
|
Errorf("%v", err) |
|
19
|
|
|
panic(err) |
|
20
|
|
|
} |
|
21
|
|
|
} |
|
22
|
|
|
|
|
23
|
|
|
// FilterIPV4 returns parsed ipv4 string. |
|
24
|
|
|
func FilterIPV4(ips []net.IP) []string { |
|
25
|
|
|
var ret = make([]string, 0) |
|
26
|
|
|
for _, ip := range ips { |
|
27
|
|
|
if ip.To4() != nil { |
|
28
|
|
|
ret = append(ret, ip.String()) |
|
29
|
|
|
} |
|
30
|
|
|
} |
|
31
|
|
|
return ret |
|
32
|
|
|
} |
|
33
|
|
|
|
|
34
|
|
|
// MkdirIfNotExist creates `folder` directory if not available |
|
35
|
|
|
func MkdirIfNotExist(folder string) error { |
|
36
|
|
|
if _, err := os.Stat(folder); err != nil { |
|
37
|
|
|
if err = os.MkdirAll(folder, 0700); err != nil { |
|
38
|
|
|
return err |
|
39
|
|
|
} |
|
40
|
|
|
} |
|
41
|
|
|
return nil |
|
42
|
|
|
} |
|
43
|
|
|
|
|
44
|
|
|
// ExistDir checks if `folder` is available |
|
45
|
|
|
func ExistDir(folder string) bool { |
|
46
|
|
|
_, err := os.Stat(folder) |
|
47
|
|
|
return err == nil |
|
48
|
|
|
} |
|
49
|
|
|
|
|
50
|
|
|
// DisplayProgressBar shows a fancy progress bar |
|
51
|
|
|
func DisplayProgressBar() bool { |
|
52
|
|
|
return isatty.IsTerminal(os.Stdout.Fd()) && displayProgress |
|
53
|
|
|
} |
|
54
|
|
|
|
|
55
|
|
|
// FolderOf makes sure you won't get LFI |
|
56
|
|
|
func FolderOf(urlStr string) string { |
|
57
|
|
|
usr, err := user.Current() |
|
58
|
|
|
FatalCheck(err) |
|
59
|
|
|
homeDir := usr.HomeDir |
|
60
|
|
|
safePath := filepath.Join(homeDir, dataFolder) |
|
61
|
|
|
|
|
62
|
|
|
// Parse the URL to get the path |
|
63
|
|
|
parsedURL, err := url.Parse(urlStr) |
|
64
|
|
|
FatalCheck(err) |
|
65
|
|
|
|
|
66
|
|
|
// Check for directory traversal attempts in the raw path before cleaning |
|
67
|
|
|
if strings.Contains(parsedURL.Path, "..") { |
|
68
|
|
|
FatalCheck(errors.New("you may be a victim of directory traversal path attack")) |
|
69
|
|
|
return "" // Return is redundant because FatalCheck will panic |
|
70
|
|
|
} |
|
71
|
|
|
|
|
72
|
|
|
// Extract the last path from the URL, excluding parameters |
|
73
|
|
|
cleanPath := TaskFromURL(urlStr) |
|
74
|
|
|
|
|
75
|
|
|
fullQualifyPath, err := filepath.Abs(filepath.Join(homeDir, dataFolder, cleanPath)) |
|
76
|
|
|
FatalCheck(err) |
|
77
|
|
|
|
|
78
|
|
|
if !strings.HasPrefix(fullQualifyPath, safePath) { |
|
79
|
|
|
FatalCheck(errors.New("path traversal attempt detected")) |
|
80
|
|
|
} |
|
81
|
|
|
|
|
82
|
|
|
return fullQualifyPath |
|
83
|
|
|
} |
|
84
|
|
|
|
|
85
|
|
|
// TaskFromURL runs when you want to download a single url |
|
86
|
|
|
func TaskFromURL(urlStr string) string { |
|
87
|
|
|
// Extract the last path from the URL, excluding parameters. |
|
88
|
|
|
// eg: URL_ADDRESS.com/path/to/file?param=value -> file |
|
89
|
|
|
parsedURL, err := url.Parse(urlStr) |
|
90
|
|
|
FatalCheck(err) |
|
91
|
|
|
// Clean the path to remove any directory traversal attempts |
|
92
|
|
|
// This ensures we only get the filename without any path manipulation |
|
93
|
|
|
cleanPath := filepath.Clean(parsedURL.Path) |
|
94
|
|
|
return filepath.Base(strings.TrimRight(cleanPath, "/\\")) |
|
95
|
|
|
} |
|
96
|
|
|
|
|
97
|
|
|
// IsURL checks if `s` is actually a parsable URL. |
|
98
|
|
|
func IsURL(s string) bool { |
|
99
|
|
|
u, err := url.Parse(s) |
|
100
|
|
|
if err != nil { |
|
101
|
|
|
return false |
|
102
|
|
|
} |
|
103
|
|
|
// Check for scheme and host to ensure it's a valid URL |
|
104
|
|
|
return u.Scheme != "" && u.Host != "" |
|
105
|
|
|
} |
|
106
|
|
|
|
abzcoding /
hget
