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Host.scala
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Host.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.parse.Parser
import org.http4s.internal.parsing.Rfc3986
import org.http4s.util.Renderable
import org.http4s.util.Writer
import scala.util.Try
object Host extends HeaderCompanion[Host]("Host") {
def apply(host: String, port: Int): Host = apply(host, Some(port))
private[http4s] val parser = {
val port = Parser.string(":") *> Rfc3986.digit.rep.string.mapFilter { s =>
Try(s.toInt).toOption
}
(Uri.Parser.host ~ port.?).map { case (host, port) =>
Host(host.value, port)
}
}
implicit val headerInstance: Header[Host, Header.Single] =
createRendered { h =>
new Renderable {
def render(writer: Writer): writer.type = {
writer.append(h.host)
if (h.port.isDefined) {
writer << ':' << h.port.get
()
}
writer
}
}
}
}
/** A Request header, that provides the host and port information
* {{{
* The "Host" header field in a request provides the host and port
* information from the target URI, enabling the origin server to
* distinguish among resources while servicing requests for multiple
* host names on a single IP address.
* }}}
*
* This header was mandatory in version 1.1 of the Http protocol.
*
* [[https://datatracker.ietf.org/doc/html/rfc7230#section-5.4 RFC-7230 Section 5.4]]
*/
final case class Host(host: String, port: Option[Int] = None)