golang gets the request path

Golang is a fast, reliable, and fixed programming language that is widely used in web applications, network services, and data processing tasks. In web applications, the program needs to receive requests from the client or browser, and then process each request. It usually needs to obtain the request path for routing functions. This article will discuss how to get the request path in Golang.

How to get the request path in Golang?

In Golang, to get the request path, you need to use an object named http.Request. This object contains all information about the request, including request method, request headers, request body, request path, etc. By operating this object, we can obtain the request path.

First of all, when we build a web server, we need to use Golang’s http package. Here is a basic HTTP server sample code:

package main

import (
    "fmt"
    "log"
    "net/http"
)

func main() {
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        // 获取请求路径
        path := r.URL.Path
        fmt.Println("请求路径: ", path)
        fmt.Fprintln(w, "Welcome to my website!")
    })

    log.Fatal(http.ListenAndServe(":8080", nil))
}

In the above code, we define an HTTP processing function that receives two parameters: a http.ResponseWriter and# Object of type ##http.Request. In the function, we called the r.URL.Path method to get the request path and print it out.

Another way to get the request path is to access the property

r.URL.Path of http.Request. The following is a sample code:

package main

import (
    "fmt"
    "log"
    "net/http"
)

func handler(w http.ResponseWriter, r *http.Request) {
    // 获取请求路径
    path := r.URL.Path
    fmt.Println("请求路径: ", path)
    fmt.Fprintln(w, "Welcome to my website!")
}

func main() {
    http.HandleFunc("/", handler)
    log.Fatal(http.ListenAndServe(":8080", nil))
}

In the above code, we define a handler function

handler, which when a request is received, passes r.URL.Path Get the request path and output it to the console. At the same time, we wrote the response logic inside the function to respond with a welcome message back to the client.

For detailed information about http.Request and http.ResponseWriter objects, please refer to Golang official documentation. In this article, we mainly focus on how to obtain the request path.

For different URLs, there may be different response methods and logic. Therefore, in an actual production environment, we need to use different routers to handle different requests. Typically, we use a third-party router such as Gorilla Mux. Gorilla Mux is a powerful router and URL matching library that can help us better manage routing logic.

package main

import (
    "fmt"
    "log"
    "net/http"

    "github.com/gorilla/mux"
)

func main() {
    // 创建新路由器
    r := mux.NewRouter()

    r.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprintln(w, "Hello, world!")
    })

    // 设定路由
    r.HandleFunc("/articles", func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprintln(w, "这是我的文章列表页面！")
    })

    // 设定路由
    r.HandleFunc("/articles/{id}", func(w http.ResponseWriter, r *http.Request) {
        // 获取路由参数
        vars := mux.Vars(r)
        id := vars["id"]

        fmt.Fprintf(w, "这是文章 %s 的详细页面！", id)
    })

    // 启动服务器
    log.Fatal(http.ListenAndServe(":8080", r))
}

In the router, we can use the

r.HandleFunc method to define different routing rules and processing functions. For example, in the above example, we define two routing rules, /articles and /articles/{id}, the first routing rule is used to respond to article list page requests , the second routing rule is used to obtain the detailed page of a specific article based on id.

If the URL contains dynamic parameters, we can use the

mux.Vars method to get their values ​​and pass these parameters to the processing function. In the above code, we obtain the value of the id parameter in the URL through vars["id"] and output it to the client.

Summary

In Golang, you need to obtain the request path through the

http.Request object. We can use the r.URL.Path property to get the path. At the same time, we can also use third-party routers to manage routing logic and processing functions. Gorilla Mux is a powerful router and URL matching library that can help us better manage routing logic.

The above is the detailed content of golang gets the request path. For more information, please follow other related articles on the PHP Chinese website!