1. 1
2. 2
3. 3
4. 4
5. 5
6. 6
7. 7
8. 8
9. 9
10. 10
11. 11
12. 12
13. 13
14. 14
15. 15
16. 16
17. 17
18. 18
19. 19
20. 20
21. 21
22. 22
23. 23
24. 24
25. 25
26. 26
27. 27
28. 28
29. 29
30. 30
31. 31
32. 32
33. 33
34. 34
35. 35
36. 36
37. 37
38. 38
39. 39
40. 40
41. 41
42. 42
43. 43
44. 44
45. 45
46. 46
47. 47
48. 48
49. 49
50. 50
51. 51
52. 52
53. 53
54. 54
55. 55
56. 56
57. 57
58. 58
59. 59
60. 60
61. 61
62. 62
63. 63

// Copyright 2021 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package util

import (
	"net/url"
	"strings"
)

const (
	userPlaceholder = "sanitized-credential"
	unparsableURL   = "(unparsable url)"
)

type sanitizedError struct {
	err      error
	replacer *strings.Replacer
}

func (err sanitizedError) Error() string {
	return err.replacer.Replace(err.err.Error())
}

// NewSanitizedError wraps an error and replaces all old, new string pairs in the message text.
func NewSanitizedError(err error, oldnew ...string) error {
	return sanitizedError{err: err, replacer: strings.NewReplacer(oldnew...)}
}

// NewURLSanitizedError wraps an error and replaces the url credential or removes them.
func NewURLSanitizedError(err error, u *url.URL, usePlaceholder bool) error {
	return sanitizedError{err: err, replacer: NewURLSanitizer(u, usePlaceholder)}
}

// NewStringURLSanitizedError wraps an error and replaces the url credential or removes them.
// If the url can't get parsed it gets replaced with a placeholder string.
func NewStringURLSanitizedError(err error, unsanitizedURL string, usePlaceholder bool) error {
	return sanitizedError{err: err, replacer: NewStringURLSanitizer(unsanitizedURL, usePlaceholder)}
}

// NewURLSanitizer creates a replacer for the url with the credential sanitized or removed.
func NewURLSanitizer(u *url.URL, usePlaceholder bool) *strings.Replacer {
	old := u.String()

	if u.User != nil && usePlaceholder {
		u.User = url.User(userPlaceholder)
	} else {
		u.User = nil
	}
	return strings.NewReplacer(old, u.String())
}

// NewStringURLSanitizer creates a replacer for the url with the credential sanitized or removed.
// If the url can't get parsed it gets replaced with a placeholder string
func NewStringURLSanitizer(unsanitizedURL string, usePlaceholder bool) *strings.Replacer {
	u, err := url.Parse(unsanitizedURL)
	if err != nil {
		// don't log the error, since it might contain unsanitized URL.
		return strings.NewReplacer(unsanitizedURL, unparsableURL)
	}
	return NewURLSanitizer(u, usePlaceholder)
}