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package.scala
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package.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
import cats.ApplicativeThrow
import fs2._
import org.typelevel.ci.CIString
import java.nio.charset.StandardCharsets
package object util {
/** Converts ASCII encoded byte stream to a stream of `String`. */
private[http4s] def asciiDecode[F[_]](implicit F: ApplicativeThrow[F]): Pipe[F, Byte, String] =
_.chunks.through(asciiDecodeC)
private def asciiCheck(b: Byte) = 0x80 & b
/** Converts ASCII encoded `Chunk[Byte]` inputs to `String`. */
private[http4s] def asciiDecodeC[F[_]](implicit
F: ApplicativeThrow[F]
): Pipe[F, Chunk[Byte], String] = { in =>
def tailRecAsciiCheck(i: Int, bytes: Array[Byte]): Stream[F, String] =
if (i == bytes.length)
Stream.emit(new String(bytes, StandardCharsets.US_ASCII))
else if (asciiCheck(bytes(i)) == 0x80)
Stream.raiseError[F](
new IllegalArgumentException("byte stream is not encodable as ascii bytes")
)
else
tailRecAsciiCheck(i + 1, bytes)
in.flatMap(c => tailRecAsciiCheck(0, c.toArray))
}
@deprecated("use org.typelevel.ci.CIString", "0.22")
type CaseInsensitiveString = CIString
@deprecated("use org.typelevel.ci.CIString", "0.22")
val CaseInsensitiveString = CIString
}