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
64. 64
65. 65
66. 66
67. 67
68. 68
69. 69
70. 70
71. 71
72. 72
73. 73
74. 74
75. 75
76. 76
77. 77
78. 78
79. 79
80. 80
81. 81
82. 82
83. 83
84. 84
85. 85
86. 86

// Copyright 2020 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 context

import (
	"context"
	"fmt"
	"net/http"
	"time"

	"code.gitea.io/gitea/modules/graceful"
	"code.gitea.io/gitea/modules/process"
)

// PrivateContext represents a context for private routes
type PrivateContext struct {
	*Context
	Override context.Context
}

// Deadline is part of the interface for context.Context and we pass this to the request context
func (ctx *PrivateContext) Deadline() (deadline time.Time, ok bool) {
	if ctx.Override != nil {
		return ctx.Override.Deadline()
	}
	return ctx.Req.Context().Deadline()
}

// Done is part of the interface for context.Context and we pass this to the request context
func (ctx *PrivateContext) Done() <-chan struct{} {
	if ctx.Override != nil {
		return ctx.Override.Done()
	}
	return ctx.Req.Context().Done()
}

// Err is part of the interface for context.Context and we pass this to the request context
func (ctx *PrivateContext) Err() error {
	if ctx.Override != nil {
		return ctx.Override.Err()
	}
	return ctx.Req.Context().Err()
}

var privateContextKey interface{} = "default_private_context"

// WithPrivateContext set up private context in request
func WithPrivateContext(req *http.Request, ctx *PrivateContext) *http.Request {
	return req.WithContext(context.WithValue(req.Context(), privateContextKey, ctx))
}

// GetPrivateContext returns a context for Private routes
func GetPrivateContext(req *http.Request) *PrivateContext {
	return req.Context().Value(privateContextKey).(*PrivateContext)
}

// PrivateContexter returns apicontext as middleware
func PrivateContexter() func(http.Handler) http.Handler {
	return func(next http.Handler) http.Handler {
		return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
			ctx := &PrivateContext{
				Context: &Context{
					Resp: NewResponse(w),
					Data: map[string]interface{}{},
				},
			}
			defer ctx.Close()

			ctx.Req = WithPrivateContext(req, ctx)
			ctx.Data["Context"] = ctx
			next.ServeHTTP(ctx.Resp, ctx.Req)
		})
	}
}

// OverrideContext overrides the underlying request context for Done() etc.
// This function should be used when there is a need for work to continue even if the request has been cancelled.
// Primarily this affects hook/post-receive and hook/proc-receive both of which need to continue working even if
// the underlying request has timed out from the ssh/http push
func OverrideContext(ctx *PrivateContext) (cancel context.CancelFunc) {
	// We now need to override the request context as the base for our work because even if the request is cancelled we have to continue this work
	ctx.Override, _, cancel = process.GetManager().AddTypedContext(graceful.GetManager().HammerContext(), fmt.Sprintf("PrivateContext: %s", ctx.Req.RequestURI), process.RequestProcessType, true)
	return cancel
}