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• SenderHandler.scala

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spice.http.server.handler.SenderHandler.scala Maven / Gradle / Ivy

package spice.http.server.handler

import cats.effect.IO
import scribe.mdc.MDC
import spice.http.content.Content
import spice.http.{Headers, HttpExchange}

case class SenderHandler(content: Content,
                         length: Option[Long] = None,
                         caching: CachingManager = CachingManager.Default,
                         replace: Boolean = false) extends HttpHandler {
  override def handle(exchange: HttpExchange)(implicit mdc: MDC): IO[HttpExchange] =
    SenderHandler.handle(exchange, content, length, caching, replace)
}

object SenderHandler {
  def handle(exchange: HttpExchange,
             content: Content,
             length: Option[Long] = None,
             caching: CachingManager = CachingManager.Default,
             replace: Boolean = false): IO[HttpExchange] = {
    if (exchange.response.content.nonEmpty && !replace) {
      throw new RuntimeException(s"Content already set (${exchange.response.content.get}) for HttpResponse in ${exchange.request.url} when attempting to set $content.")
    }
    val contentLength = length.getOrElse(content.length)
    exchange.modify { response =>
      IO(response.withContent(content).withHeader(Headers.`Content-Length`(contentLength)))
    }.flatMap(caching.handle)
  }
}