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Accept-Encoding.scala
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Accept-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.eq._
import org.typelevel.ci._
object `Accept-Encoding` {
def apply(head: ContentCoding, tail: ContentCoding*): `Accept-Encoding` =
apply(NonEmptyList(head, tail.toList))
def parse(s: String): ParseResult[`Accept-Encoding`] =
ParseResult.fromParser(parser, "Invalid Accept-Encoding header")(s)
private[http4s] val parser: Parser[`Accept-Encoding`] = {
import org.http4s.internal.parsing.CommonRules.headerRep1
headerRep1(ContentCoding.parser).map(xs => apply(xs))
}
implicit val headerInstance: Header[`Accept-Encoding`, Header.Recurring] =
Header.createRendered(
ci"Accept-Encoding",
_.values,
parse,
)
implicit val headerSemigroupInstance: cats.Semigroup[`Accept-Encoding`] =
(a, b) => `Accept-Encoding`(a.values.concatNel(b.values))
}
final case class `Accept-Encoding`(values: NonEmptyList[ContentCoding]) {
def qValue(coding: ContentCoding): QValue = {
def specific =
values.toList.collectFirst {
case cc: ContentCoding if cc =!= ContentCoding.`*` && cc.matches(coding) => cc.qValue
}
def splatted =
values.toList.collectFirst {
case cc: ContentCoding if cc === ContentCoding.`*` => cc.qValue
}
specific.orElse(splatted).getOrElse(QValue.Zero)
}
def satisfiedBy(coding: ContentCoding): Boolean = qValue(coding) > QValue.Zero
}