golang web服务器

The Go programming language is well-known for having a built-in web server. In this article you will learn how you can easily make your own web server with Go. You won’t need any other packages beside the ones that are already built in!

Go编程语言因具有内置的Web服务器而闻名。 在本文中，您将学习如何使用Go轻松制作自己的Web服务器。 除了已经内置的软件包之外，您不需要任何其他软件包！

First, hop in to your text editor. Then create a file called webserver.go and enter the following code:

首先，跳至您的文本编辑器。 然后创建一个名为webserver.go的文件并输入以下代码：

package mainimport ("net/http""io"
)func main() {http.HandleFunc("/", servePage)http.ListenAndServe(":8080", nil)
}func servePage(writer http.ResponseWriter, reqest *http.Request) {io.WriteString(writer, "Hello world!")
}

Let’s break down the block of code above. We import the net/http package: this package contains the web server itself. Then we also import the io package, we will make use of this later to actually serve something to the client.

让我们分解上面的代码块。 我们导入net/http包：该包包含Web服务器本身。 然后，我们还导入了io包，稍后我们将利用此包向客户端实际提供服务。

In the main function we do two things. First of all we instruct the server to let the function called servePage handle all incoming traffic to / - in this case it means that it handles requests to any URL.

在main函数中，我们做两件事。 首先，我们指示服务器让称为servePage的函数处理/所有传入流量，在这种情况下，这意味着它处理对任何 URL请求。

The second thing we do is actually activating the server. We do this using a function named ListenAndServe. This function requires two parameters: the port (as string), in this case it’s 8080, and the handler (as Handler) - however the last one isn’t important yet. We will just make it nil and everything will work just fine.

我们要做的第二件事实际上是激活服务器。 我们使用名为ListenAndServe的函数进行此操作。 此函数需要两个参数： port (如string )(在本例中为8080 )和handler (如Handler )-但是最后一个并不重要。 我们将其设置nil ，一切都会正常进行。

In the servePage we do just one simple thing, for now. Using the io package and the WriteString function that it contains we can respond to the clients’ request with the text Hello world! (or any other string, of course).

目前，在servePage我们只做一件简单的事情。 使用io包及其包含的WriteString函数，我们可以使用文本Hello world!来响应客户的请求Hello world! (或者其他任何字符串)。

You also might have noticed that the servePage function has two arguments: the writer and the request. With the writer you can actually respond to a HTTP request and with the request you may get more information about the request itself.

您可能还已经注意到servePage函数具有两个参数： writer和request 。 使用writer，您实际上可以响应HTTP请求，并且使用该request您可以获得有关请求本身的更多信息。

Congratulations! You just created your first web server! If you want to test it: just run go run webserver.go, fire up a browser and navigate to http://localhost:8080!

恭喜你！ 您刚刚创建了第一个Web服务器！ 如果要测试：只需运行go run webserver.go ，启动浏览器并导航到http://localhost:8080 ！

翻译自: https://www.freecodecamp.org/news/how-to-make-your-own-web-server-with-go/

golang web服务器