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
|
package protocol
import (
"strings"
"github.com/aws/aws-sdk-go/aws/request"
)
// ValidateEndpointHostHandler is a request handler that will validate the
// request endpoint's hosts is a valid RFC 3986 host.
var ValidateEndpointHostHandler = request.NamedHandler{
Name: "awssdk.protocol.ValidateEndpointHostHandler",
Fn: func(r *request.Request) {
err := ValidateEndpointHost(r.Operation.Name, r.HTTPRequest.URL.Host)
if err != nil {
r.Error = err
}
},
}
// ValidateEndpointHost validates that the host string passed in is a valid RFC
// 3986 host. Returns error if the host is not valid.
func ValidateEndpointHost(opName, host string) error {
paramErrs := request.ErrInvalidParams{Context: opName}
labels := strings.Split(host, ".")
for i, label := range labels {
if i == len(labels)-1 && len(label) == 0 {
// Allow trailing dot for FQDN hosts.
continue
}
if !ValidHostLabel(label) {
paramErrs.Add(request.NewErrParamFormat(
"endpoint host label", "[a-zA-Z0-9-]{1,63}", label))
}
}
if len(host) > 255 {
paramErrs.Add(request.NewErrParamMaxLen(
"endpoint host", 255, host,
))
}
if paramErrs.Len() > 0 {
return paramErrs
}
return nil
}
// ValidHostLabel returns if the label is a valid RFC 3986 host label.
func ValidHostLabel(label string) bool {
if l := len(label); l == 0 || l > 63 {
return false
}
for _, r := range label {
switch {
case r >= '0' && r <= '9':
case r >= 'A' && r <= 'Z':
case r >= 'a' && r <= 'z':
case r == '-':
default:
return false
}
}
return true
}
|
