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/
ResponseChunkAggregation.scala
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/
ResponseChunkAggregation.scala
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/*
* Copyright (C) 2011-2013 spray.io
*
* 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 spray.can.client
import spray.http._
import spray.io._
import spray.can.Http
object ResponseChunkAggregation {
def apply(limit: Int): PipelineStage =
new PipelineStage {
def apply(context: PipelineContext, commandPL: CPL, eventPL: EPL): Pipelines =
new Pipelines with DynamicEventPipeline {
val commandPipeline = commandPL
val initialEventPipeline: EPL = {
case Http.MessageEvent(ChunkedResponseStart(response)) ⇒
eventPipeline.become(aggregating(response, HttpData.newBuilder += response.entity.data))
case ev ⇒ eventPL(ev)
}
def aggregating(response: HttpResponse, builder: HttpData.Builder): EPL = {
case Http.MessageEvent(MessageChunk(data, _)) ⇒
if (builder.byteCount + data.length <= limit)
builder += data
else closeWithError()
case Http.MessageEvent(_: ChunkedMessageEnd) ⇒
val contentType = response.header[HttpHeaders.`Content-Type`] match {
case Some(x) ⇒ x.contentType
case None ⇒ ContentTypes.`application/octet-stream`
}
eventPL(Http.MessageEvent(response.copy(entity = HttpEntity(contentType, builder.result()))))
eventPipeline.become(initialEventPipeline)
case ev ⇒ eventPL(ev)
}
def closeWithError(): Unit = {
context.log.error("Aggregated response entity greater than configured limit of {} bytes," +
"closing connection", limit)
commandPL(Http.Close)
eventPipeline.become(eventPL) // disable this stage
}
}
}
}