blob: 92322906c03155b6d7d49783bcd8d00cb7fc7b21 (
plain)
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
|
package api
import (
"fmt"
"net/http"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/helper"
)
// Prevent internal API responses intended for gitlab-workhorse from
// leaking to the end user
func Block(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
rw := &blocker{rw: w, r: r}
defer rw.flush()
h.ServeHTTP(rw, r)
})
}
type blocker struct {
rw http.ResponseWriter
r *http.Request
hijacked bool
status int
}
func (b *blocker) Header() http.Header {
return b.rw.Header()
}
func (b *blocker) Write(data []byte) (int, error) {
if b.status == 0 {
b.WriteHeader(http.StatusOK)
}
if b.hijacked {
return len(data), nil
}
return b.rw.Write(data)
}
func (b *blocker) WriteHeader(status int) {
if b.status != 0 {
return
}
if helper.IsContentType(ResponseContentType, b.Header().Get("Content-Type")) {
b.status = 500
b.Header().Del("Content-Length")
b.hijacked = true
helper.Fail500(b.rw, b.r, fmt.Errorf("api.blocker: forbidden content-type: %q", ResponseContentType))
return
}
b.status = status
b.rw.WriteHeader(b.status)
}
func (b *blocker) flush() {
b.WriteHeader(http.StatusOK)
}
|
