forked from http4s/http4s
/
Part.scala
59 lines (50 loc) · 2.19 KB
/
Part.scala
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package org.http4s
package multipart
import cats.effect.Sync
import fs2.Stream
import fs2.io.readInputStream
import fs2.text.utf8Encode
import java.io.{File, FileInputStream, InputStream}
import java.net.URL
import org.http4s.headers.`Content-Disposition`
final case class Part[F[_]](headers: Headers, body: Stream[F, Byte]) {
def name: Option[String] = headers.get(`Content-Disposition`).flatMap(_.parameters.get("name"))
def filename: Option[String] =
headers.get(`Content-Disposition`).flatMap(_.parameters.get("filename"))
}
object Part {
private val ChunkSize = 8192
@deprecated(
"""Empty parts are not allowed by the multipart spec, see: https://tools.ietf.org/html/rfc7578#section-4.2
Moreover, it allows the creation of potentially incorrect multipart bodies
""".stripMargin,
"0.18.12"
)
def empty[F[_]]: Part[F] =
Part(Headers.empty, EmptyBody)
def formData[F[_]: Sync](name: String, value: String, headers: Header*): Part[F] =
Part(
`Content-Disposition`("form-data", Map("name" -> name)) +: headers,
Stream.emit(value).through(utf8Encode))
def fileData[F[_]: Sync](name: String, file: File, headers: Header*): Part[F] =
fileData(name, file.getName, new FileInputStream(file), headers: _*)
def fileData[F[_]: Sync](name: String, resource: URL, headers: Header*): Part[F] =
fileData(name, resource.getPath.split("/").last, resource.openStream(), headers: _*)
def fileData[F[_]: Sync](
name: String,
filename: String,
entityBody: EntityBody[F],
headers: Header*): Part[F] =
Part(
`Content-Disposition`("form-data", Map("name" -> name, "filename" -> filename)) +:
Header("Content-Transfer-Encoding", "binary") +:
headers,
entityBody)
// The InputStream is passed by name, and we open it in the by-name
// argument in callers, so we can avoid lifting into an effect. Exposing
// this API publicly would invite unsafe use, and the `EntityBody` version
// should be safe.
private def fileData[F[_]](name: String, filename: String, in: => InputStream, headers: Header*)(
implicit F: Sync[F]): Part[F] =
fileData(name, filename, readInputStream(F.delay(in), ChunkSize), headers: _*)
}