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.
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)) }
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.
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)) }
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.
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.
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.
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