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Accept.scala
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Accept.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 org.http4s.internal.parsing.CommonRules.headerRep1
import org.http4s.util.Renderable
import org.http4s.util.Writer
import org.typelevel.ci._
object Accept {
def apply(head: MediaRangeAndQValue, tail: MediaRangeAndQValue*): Accept =
apply(NonEmptyList(head, tail.toList))
def parse(s: String): ParseResult[Accept] =
ParseResult.fromParser(parser, "Invalid Accept header")(s)
private[http4s] val parser: Parser[Accept] = {
val acceptParams =
(QValue.parser ~ MediaRange.mediaTypeExtensionParser.rep0).map { case (qValue, ext) =>
(
qValue,
ext,
)
}
val qAndExtension =
acceptParams.orElse(MediaRange.mediaTypeExtensionParser.rep.map { s =>
(org.http4s.QValue.One, s.toList)
})
val fullRange: Parser[MediaRangeAndQValue] = (MediaRange.parser ~ qAndExtension.?).map {
case (mr, params) =>
val (qValue, extensions) = params.getOrElse((QValue.One, Seq.empty))
mr.withExtensions(extensions.toMap).withQValue(qValue)
}
headerRep1(fullRange).map(Accept(_))
}
implicit val headerInstance: Header[Accept, Header.Recurring] =
Header.createRendered(
ci"Accept",
_.values,
parse,
)
implicit val headerSemigroupInstance: cats.Semigroup[Accept] =
(a, b) => Accept(a.values.concatNel(b.values))
}
final case class MediaRangeAndQValue(mediaRange: MediaRange, qValue: QValue = QValue.One)
extends Renderable {
def render(writer: Writer): writer.type = {
writer << mediaRange.withExtensions(Map.empty) << qValue
MediaRange.renderExtensions(writer, mediaRange)
writer
}
}
object MediaRangeAndQValue {
implicit def withDefaultQValue(mediaRange: MediaRange): MediaRangeAndQValue =
MediaRangeAndQValue(mediaRange, QValue.One)
}
final case class Accept(values: NonEmptyList[MediaRangeAndQValue])