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Trailer.scala
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Trailer.scala
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/*
* 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 org.http4s.internal.parsing.CommonRules
import org.http4s.internal.parsing.Rfc2616
import org.typelevel.ci._
object Trailer {
def apply(head: CIString, tail: CIString*): Trailer =
apply(NonEmptyList(head, tail.toList))
def parse(s: String): ParseResult[Trailer] =
ParseResult.fromParser(parser, "Invalid Trailer header")(s)
private[http4s] val parser =
CommonRules.headerRep1(Rfc2616.token).map(xs => Trailer(xs.map(CIString(_))))
val name: CIString = ci"Trailer"
implicit val headerInstance: Header[Trailer, Header.Recurring] =
Header.createRendered(
name,
_.headers,
parse,
)
implicit val headerSemigroupInstance: cats.Semigroup[Trailer] =
(a, b) => Trailer(a.headers.concatNel(b.headers))
}
/** @see [[https://datatracker.ietf.org/doc/html/rfc7230#section-4.4, RFC 7230, Section 4.4, Trailer]]
*/
final case class Trailer(headers: NonEmptyList[CIString])