scalaz.http.Version.scala Maven / Gradle / Ivy
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package scalaz
package http
import Scalaz._
import java.lang.Character.isDigit
/**
* HTTP version.
* RFC 2616 Section 3.1 HTTP Version.
*
* @author Tony Morris
*/
sealed trait Version {
/**
* HTTP Version major number.
*/
val major: Digit
/**
* HTTP Version major number.
*/
val minor: Digit
/**
* A string representation of this version
*/
def asString = "HTTP/" + major.toInt + "." + minor.toInt
}
trait Versions {
/**
* Returns a string representation for the given version.
*/
implicit def VersionString(v: Version) = v.asString
/**
* Returns a string representation for the given version.
*/
implicit def ListVersion: (List[Char] => Option[Version]) = StringVersion _ compose (_.mkString)
/**
* Returns a potential version for the given string of the form HTTP/major/minor.
*/
implicit def StringVersion(s: String): Option[Version] =
if (s.length < 8)
None
else {
val major = s charAt 5
val minor = s charAt 7
List(major, minor) ↦ ((c: Char) => isDigit(c).option(c.toLong - 48L)) map {case List(maj, min) => Version.version(maj, min)}
}
}
/**
* HTTP version.
* RFC 2616 Section 3.1 HTTP Version.
*/
object Version extends Versions {
/**
* Extracts the major and minor numbers of the given version.
*/
def unapply(v: Version): Option[(Digit, Digit)] =
Some(v.major, v.minor)
/**
* Constructs a version with the given major and minor numbers.
*/
def version(maj: Digit, min: Digit): Version = new Version {
val major = maj
val minor = min
}
/**
* A version for HTTP/1.0.
*/
import Digit._
val version10 = version(_1, _0)
/**
* A version for HTTP/1.1.
*/
val version11 = version(_1, _1)
}