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我正在开发Suave 1.0 + Angular 2.0 示例应用程序，在监视模式下启动 Suave 服务器非常有趣，因此服务器监视根文件夹和子文件夹中的文件更改（js、css、html）并自动向refresh所有打开的浏览器发送命令更改任何文件时与我的应用程序一起使用的选项卡。

lite-server从Angular 2 5min Quckstark可以做到这一点，它非常方便。

我认为大多数手表都可以在最新的 Steffen Forkmann 帖子中找到，但如何发送refresh到打开的浏览器选项卡并不是很干净。

请提供类似实现的完整代码Suave。

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1 回答 1

11

服务器的代码Suave应该与此类似

#r "packages/Suave/lib/net40/suave.dll"
#r "packages/FAKE/tools/FakeLib.dll"

open Fake
open Suave
open Suave.Operators
open Suave.Sockets.Control
open Suave.WebSocket
open Suave.Utils
open Suave.Files
open Suave.RequestErrors
open Suave.Filters
open System
open System.Net


let port =
    let rec findPort port =
        let portIsTaken =
            System.Net.NetworkInformation.IPGlobalProperties.GetIPGlobalProperties().GetActiveTcpListeners()
            |> Seq.exists (fun x -> x.Port = int(port))
        if portIsTaken then findPort (port + 1us) else port
    findPort 8083us

let logger = Logging.Loggers.ConsoleWindowLogger Logging.LogLevel.Verbose

let refreshEvent = new Event<_>()

let handleWatcherEvents (events:FileChange seq) =
    for e in events do
        let fi = fileInfo e.FullPath
        traceImportant <| sprintf "%s was changed." fi.Name
    refreshEvent.Trigger()

let socketHandler (webSocket : WebSocket) =
  fun cx -> socket {
    while true do
      let! refreshed =
        Control.Async.AwaitEvent(refreshEvent.Publish)
        |> Suave.Sockets.SocketOp.ofAsync
      do! webSocket.send Text (ASCII.bytes "refreshed") true
  }

let cfg =
  { defaultConfig with
      homeFolder = Some (__SOURCE_DIRECTORY__)
      bindings =
        [ HttpBinding.mk HTTP IPAddress.Loopback port ]
      listenTimeout = TimeSpan.FromMilliseconds 3000. }

let app : WebPart =
  choose [
    Filters.log logger logFormat >=> never
    Filters.path "/websocket" >=> handShake socketHandler
    Filters.GET >=> Filters.path "/" >=> file "index.html"
    Writers.setHeader "Cache-Control" "no-cache, no-store, must-revalidate"
      >=> Writers.setHeader "Pragma" "no-cache"
      >=> Writers.setHeader "Expires" "0"
      >=> browseHome
    NOT_FOUND "Found no handlers."
  ]


let watcher =
    !! ("app/*.js")
      ++ ("*.html")
    |> WatchChanges handleWatcherEvents

try
    System.Diagnostics.Process.Start(sprintf "http://localhost:%d/index.html" port) |> ignore
    startWebServer cfg app
finally
    watcher.Dispose()

因此，我们设置了处理js（由 TypeScript 生成）和html文件中的更改并将refresh命令发送到客户端的观察程序，但同时我们需要将以下代码添加到客户端处理的head部分index.htmlrefresh

<!-- 3. Listen on refresh events from the server -->
<script language="javascript" type="text/javascript">
    function init()
    {
        websocket = new WebSocket("ws://"+window.location.host+"/websocket");
        websocket.onmessage = function(evt) { location.reload(); };
    }
    window.addEventListener("load", init, false);
</script>

您可以在此处找到完整的演示应用程序

于 2016-01-05T19:09:44.110 回答