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Content-Length.scala
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Content-Length.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 org.http4s.parser.AdditionalRules
import org.typelevel.ci._
/** Constructs a `Content-Length` header.
*
* The HTTP RFCs do not specify a maximum length. We have decided that `Long.MaxValue`
* bytes ought to be good enough for anybody in order to avoid the irritations of `BigInt`.
*
* @param length the length
*/
final case class `Content-Length`(length: Long) {
def modify(f: Long => Long): Option[`Content-Length`] =
`Content-Length`.fromLong(f(length)).toOption
}
object `Content-Length` {
val zero: `Content-Length` = apply(0)
def fromLong(length: Long): ParseResult[`Content-Length`] =
if (length >= 0L) ParseResult.success(apply(length))
else ParseResult.fail("Invalid Content-Length", length.toString)
def unsafeFromLong(length: Long): `Content-Length` =
fromLong(length).fold(throw _, identity)
def parse(s: String): ParseResult[`Content-Length`] =
ParseResult.fromParser(parser, "Invalid Content-Length header")(s)
private[http4s] val parser = AdditionalRules.NonNegativeLong.map(fromLong).mapFilter(_.toOption)
val name: CIString = ci"Content-Length"
implicit val headerInstance: Header[`Content-Length`, Header.Single] =
Header.createRendered(
name,
_.length,
parse,
)
}