-
Notifications
You must be signed in to change notification settings - Fork 787
/
X-Forwarded-For.scala
69 lines (60 loc) · 2.11 KB
/
X-Forwarded-For.scala
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
69
/*
* Copyright 2013 http4s.org
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.http4s
package headers
import cats.data.NonEmptyList
import cats.parse._
import com.comcast.ip4s.IpAddress
import org.http4s.Header
import org.http4s.internal.parsing.CommonRules
import org.http4s.internal.parsing.Rfc3986
import org.http4s.util.Renderable
import org.http4s.util.Writer
import org.typelevel.ci._
object `X-Forwarded-For` {
def apply(head: Option[IpAddress], tail: Option[IpAddress]*): `X-Forwarded-For` =
apply(NonEmptyList(head, tail.toList))
def parse(s: String): ParseResult[`X-Forwarded-For`] =
ParseResult.fromParser(parser, "Invalid X-Forwarded-For header")(s)
private[http4s] val parser: Parser[`X-Forwarded-For`] =
CommonRules
.headerRep1(
(Rfc3986.ipv4Address.backtrack | Rfc3986.ipv6Address)
.map(s => Some(s)) | (Parser.string("unknown").as(None))
)
.map(`X-Forwarded-For`.apply)
implicit val headerInstance: Header[`X-Forwarded-For`, Header.Single] =
Header.createRendered(
ci"X-Forwarded-For",
h =>
new Renderable {
def render(writer: Writer): writer.type = {
h.values.head.fold(writer.append("unknown"))(i => writer.append(i.toString))
h.values.tail.foreach(h.append(writer, _))
writer
}
},
parse,
)
}
final case class `X-Forwarded-For`(values: NonEmptyList[Option[IpAddress]]) {
@inline
private def append(w: Writer, add: Option[IpAddress]): w.type = {
w.append(", ")
if (add.isDefined) w.append(add.get.toString)
else w.append("unknown")
}
}