如何从F＃中使用HttpClient？ [英] How to consume HttpClient from F#?

问题描述

我是F＃的新手，并从C＃开发人员的角度坚持了对F＃异步的理解。假设在C＃中包含以下代码段：

I'm new to F# and stuck in understanding async in F# from the perspective of a C# developer. Say having the following snippet in C#:

var httpClient = new HttpClient();
var response = await httpClient.GetAsync(url);
response.EnsureSuccessStatusCode();
string content = await response.Content.ReadAsStringAsync();

如何在F＃中编写相同的内容？

How to write the same in F#?

推荐答案

这里是一个应执行所需功能的函数（请注意，您必须将代码包装在异步计算表达式中才能使用let！语法） ：

Here is a function that should do what you're looking for (note that you'll have to wrap the code in an asynchronous computation expression in order to use the let! syntax):

let getAsync (url:string) = 
    async {
        let httpClient = new System.Net.Http.HttpClient()
        let! response = httpClient.GetAsync(url) |> Async.AwaitTask
        response.EnsureSuccessStatusCode () |> ignore
        let! content = response.Content.ReadAsStringAsync() |> Async.AwaitTask
        return content
    }

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