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Transfer-Encoding.scala
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Transfer-Encoding.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 cats.parse.Parser
import cats.syntax.all._
import org.http4s.Header
import org.http4s.internal.parsing.CommonRules
import org.typelevel.ci._
object `Transfer-Encoding` {
def apply(head: TransferCoding, tail: TransferCoding*): `Transfer-Encoding` =
apply(NonEmptyList(head, tail.toList))
val name = ci"Transfer-Encoding"
def parse(s: String): ParseResult[`Transfer-Encoding`] =
ParseResult.fromParser(parser, "Invalid Transfer-Encoding header")(s)
private[http4s] val parser: Parser[`Transfer-Encoding`] =
CommonRules.headerRep1(TransferCoding.parser).map(apply)
implicit val headerInstance: Header[`Transfer-Encoding`, Header.Recurring] =
Header.createRendered(
name,
_.values,
parse,
)
implicit val headerSemigroupInstance: cats.Semigroup[`Transfer-Encoding`] =
(a, b) => `Transfer-Encoding`(a.values.concatNel(b.values))
}
final case class `Transfer-Encoding`(values: NonEmptyList[TransferCoding]) {
def hasChunked: Boolean = values.exists(_ === TransferCoding.chunked)
/** Keep transfer codings matching the predicate. If no values remain,
* return none
*
* {{{
* scala> import org.http4s._
* scala> val te = `Transfer-Encoding`(TransferCoding.chunked, TransferCoding.gzip)
* scala> te.filter(_ != TransferCoding.chunked)
* res0: Option[`Transfer-Encoding`] = Some(Transfer-Encoding(NonEmptyList(TransferCoding(gzip))))
* scala> te.filter(_ => false)
* res0: Option[`Transfer-Encoding`] = None
* }}}
*/
def filter(f: TransferCoding => Boolean): Option[`Transfer-Encoding`] =
NonEmptyList.fromList(values.filter(f)).map(`Transfer-Encoding`(_))
}