如果有人可以指出如何修改以下播放框架日志记录过滤器(参考play filters)以获得以下内容,我将不胜感激:
import play.api.Logger
import play.api.mvc._
import play.api.libs.concurrent.Execution.Implicits.defaultContext
object LoggingFilter extends EssentialFilter {
def apply(nextFilter: EssentialAction) = new EssentialAction {
def apply(requestHeader: RequestHeader) = {
val startTime = System.currentTimeMillis
nextFilter(requestHeader).map { result =>
val endTime = System.currentTimeMillis
val requestTime = endTime - startTime
Logger.info(s"${requestHeader.method} ${requestHeader.uri}" +
s" took ${requestTime}ms and returned ${result.header.status}")
result.withHeaders("Request-Time" -> requestTime.toString)
}
}
}
}
到目前为止,我已经尝试了以下解决方案,它显然是丑陋和残酷的,因为它包含阻塞调用和神秘操作符。我仍然不确定如何重新注入修改后的请求体。 (所提出的解决方案包含来自2和3的代码。)
import play.api.libs.iteratee._
import play.api.mvc._
import scala.concurrent.ExecutionContext.Implicits.global
import scala.concurrent.{Await, Future}
import scala.concurrent.duration.Duration
class ReqResFilter extends EssentialFilter {
def apply(next: EssentialAction) = new EssentialAction {
def apply(requestHeader: RequestHeader): Iteratee[Array[Byte], Result] = {
modifyRequest(next, requestHeader).map { result => modifyResponse(result)}
}
}
def bytesToString: Enumeratee[Array[Byte], String] = Enumeratee.map[Array[Byte]] { bytes => new String(bytes)}
def modifyRequest(nextA: EssentialAction, request: RequestHeader): Iteratee[Array[Byte], Result] = {
def step(body: Array[Byte], nextI: Iteratee[Array[Byte], Result])(i: Input[Array[Byte]]):
Iteratee[Array[Byte], Result] = i match {
case Input.EOF =>
val requestBody = new String(body, "utf-8")
val modRequestBody = requestBody.replaceAll("REPLACE_ME", "1224")
println(s"modifyRequest:: Here is the request body ${modRequestBody}")
Iteratee.flatten(nextI.feed(Input.EOF))
case Input.Empty =>
Cont[Array[Byte], Result](step(body, nextI) _)
case Input.El(e) =>
val curBody = Array.concat(body, e)
Cont[Array[Byte], Result](step(curBody, Iteratee.flatten(nextI.feed(Input.El(e)))) _)
}
val nextIteratee: Iteratee[Array[Byte], Result] = nextA(request)
Cont[Array[Byte], Result](i => step(Array(), nextIteratee)(i))
}
def modifyResponse(result: Result): Result = {
val responseBodyFuture: Future[String] = result.body |>>> bytesToString &>> Iteratee.consume[String]()
val responseBody = Await.result(responseBodyFuture, Duration.Inf)
val modResponseBody = responseBody.replaceAll("REPLACE_ME", "1224")
println(s"modifyResponse:: Here is the response body ${modResponseBody}")
new Result(result.header, Enumerator(modResponseBody.getBytes)).withHeaders("New-Header" -> "1234")
}
}
答案 0 :(得分:2)
因为这里没有解决方案,所以让我添加一个解决方案。为了使它工作,我在modifyRequest()中重写了step(),如下所示:
def step(body: Array[Byte], nextI: Iteratee[Array[Byte], Result])(i: Input[Array[Byte]]):
Iteratee[Array[Byte], Result] = i match {
case Input.EOF =>
val requestBody = new String(body, "utf-8")
val modRequestBody = requestBody.replaceAll("REPLACE_ME", "1224")
println(s"modifyRequest:: Here is the request body ${modRequestBody}")
Iteratee.flatten(nextI.feed(Input.El(modRequestBody.getBytes)))
case Input.Empty =>
Cont[Array[Byte], Result](step(body, nextI) _)
case Input.El(e) =>
val curBody = Array.concat(body, e)
Cont[Array[Byte], Result](step(curBody, nextI) _)
}
此更改仍在阻塞,因为它会缓冲传入的请求。如果有人有更好的解决方案,请发帖。感谢。