4
我有以下服务器端播放代码,以便为HTML5 EventSources提供端点。EventSource和Internet Explorer
package controllers
import scala.util.matching
import play.api.mvc._
import play.api.libs.json.JsValue
import play.api.libs.iteratee.{Concurrent, Enumeratee}
import play.api.libs.EventSource
import play.api.libs.concurrent.Execution.Implicits._
object Application extends Controller {
/** Central hub for distributing chat messages */
val (eventOut, eventChannel) = Concurrent.broadcast[JsValue]
/** Enumeratee for filtering messages based on eventSpec */
def filter(eventSpec: String) = Enumeratee.filter[JsValue] {
json: JsValue => ("(?i)" + eventSpec).r.pattern.matcher((json \ "eventSpec").as[String]).matches
}
/** Enumeratee for detecting disconnect of SSE stream */
def connDeathWatch(addr: String): Enumeratee[JsValue, JsValue] =
Enumeratee.onIterateeDone{() => println(addr + " - SSE disconnected") }
/** Controller action serving activity based on eventSpec */
def events = Action { req =>
println(req.remoteAddress + " - connected and subscribed for '" + eventSpec +"'")
Ok.feed(eventOut
&> filter(eventSpec)
&> Concurrent.buffer(50)
&> connDeathWatch(req.remoteAddress)
&> EventSource()
).as("text/event-stream").withHeaders(
"Access-Control-Allow-Origin" -> "*",
"Access-Control-Allow-Methods" -> "GET",
"Access-Control-Allow-Headers" -> "Content-Type"
)
}
}
我的路线看起来像
GET /事件controllers.Application.events
当Chrome浏览器通过一个EventSource的物体连接本身这台服务器工作完全正常。由于IE不支持EventSources,因此我使用了this填充库。现在的问题是:IE正确订阅了事件,因为我看到'连接和订阅'日志输出,但只要事件应该传递给此连接,它就会记录'SSE断开连接'。我在这里错过了什么?一些http头文件?