F＃异步问题

Question

I've written a dummy http server as an exercise in F#. 我已经在F＃中编写了一个虚拟的http服务器作为练习。

I'm using Mono 2.4.4 on Ubuntu 10.04 x86_64, with MonoDevelop. 我正在使用MonoDevelop在Ubuntu 10.04 x86_64上使用Mono 2.4.4。

The following code fails to compile with the error: 以下代码无法编译并显示错误：

Error FS0039: The field, constructor or member 'Spawn' is not defined (FS0039)

Could someone try this in VisualStudio please, I don't know whether this is a Mono problem, or my problem. 有人可以在Visual Studio中尝试这个吗，我不知道这是Mono问题还是我的问题。

I have tried several Async examples from the F# book, and they also all produce similar messages about Async.* methods. 我已经尝试了F＃书中的几个Async示例，它们还都产生有关Async。*方法的类似消息。

Thanks, 谢谢，

Chris. 克里斯。

#light

open System
open System.IO
open System.Threading
open System.Net
open System.Net.Sockets
open Microsoft.FSharp.Control.CommonExtensions

printfn "%s" "Hello World!"

let headers = System.Text.Encoding.ASCII.GetBytes("HTTP/1.0 200 OK\r\nContent-Type: text/html; charset=UTF-8\r\nContent-Length: 37\r\nDate: Sun, 13 Jun 2010 05:30:00 GMT\r\nServer: FSC/0.0.1\r\n\r\n")
let content = System.Text.Encoding.ASCII.GetBytes("<html><body>Hello World</body></html>")

let serveAsync (client : TcpClient) =
    async { let out = client.GetStream()
            do! out.AsyncWrite(headers)
            do! Async.Sleep 3000
            do! out.AsyncWrite(content)
            do out.Close()
            }

let http_server (ip, port) = 
    let server = new TcpListener(IPAddress.Parse(ip),port)
    server.Start()
    while true do 
        let client = server.AcceptTcpClient()
        printfn "new client"
        Async.Spawn (serveAsync client)

http_server ("0.0.0.0", 1234)

Answer 1

Spawn is now called Start (the library APIs have changed a bit since a couple of the books were published a few years ago). Spawn现在称为Start （自几年前出版了几本书以来，库的API有所更改）。

Check the docs at 在以下位置查看文档

http://msdn.microsoft.com/en-us/library/ee370232.aspx http://msdn.microsoft.com/en-us/library/ee370232.aspx

F＃异步问题

问题描述

1 个解决方案

解决方案1
5 已采纳 2010-06-13 07:16:11

F＃异步问题

问题描述

1 个解决方案

解决方案1 5 已采纳 2010-06-13 07:16:11

解决方案1
5 已采纳 2010-06-13 07:16:11