Golang function tcp, udp, http and websocket processing methods
With the continuous development of Internet technology, network communication has become an essential modern skill. In this process, function (Function), as an efficient and flexible programming method, has become a tool favored by more and more programmers. Among these functions, the processing methods based on TCP, UDP, HTTP and WebSocket protocols are particularly important. Today, this article will focus on the Golang function processing methods under these four protocols.
1. Function processing method based on TCP protocol
TCP (Transmission Control Protocol) is a connection-oriented, reliable, byte stream-based transport layer protocol. In Golang, we can create a simple TCP server through the following code:
package main import ( "fmt" "net" ) func main() { listener, err := net.Listen("tcp", "127.0.0.1:8080") if err != nil { fmt.Println("Error listening:", err.Error()) return } for { conn, err := listener.Accept() if err != nil { fmt.Println("Error accepting:", err.Error()) return } go handleRequest(conn) } } func handleRequest(conn net.Conn) { buf := make([]byte, 1024) for { _, err := conn.Read(buf) if err != nil { fmt.Println("Error reading:", err.Error()) return } conn.Write([]byte("Hello, world!")) } }
In the above code, we use the net package to create a TCP listener, and then use the Accept() method to wait for the client terminal connection. Next, we handle the connection in the handleRequest() function and send our response in the connection.
2. Function processing method based on UDP protocol
UDP (User Datagram Protocol) is a non-connection and unreliable transport layer protocol. In Golang, we can also easily create a simple UDP server, the code is as follows:
package main import ( "fmt" "net" ) func main() { udpAddr, err := net.ResolveUDPAddr("udp", "127.0.0.1:8080") if err != nil { fmt.Println("Error Resolving UDP address:", err.Error()) return } conn, err := net.ListenUDP("udp", udpAddr) if err != nil { fmt.Println("Error Listening:", err.Error()) return } defer conn.Close() for { buf := make([]byte, 1024) _, remoteAddr, err := conn.ReadFromUDP(buf) if err != nil { fmt.Println("Error Reading:", err.Error()) continue } conn.WriteToUDP([]byte("Hello, world!"), remoteAddr) } }
3. Function processing method based on HTTP protocol
HTTP (Hypertext Transfer Protocol) is An application layer protocol used to transfer data between web browsers and web servers. In Golang, we can use the net/http package in the standard library to create a simple HTTP server. The code is as follows:
package main import ( "fmt" "net/http" ) func handler(w http.ResponseWriter, r *http.Request) { fmt.Fprintf(w, "Hello, world!") } func main() { http.HandleFunc("/", handler) http.ListenAndServe(":8080", nil) }
In the above code, we define a handler() function to handle HTTP request, and use http.HandleFunc() in the main() function to specify our handler. Finally, we use the http.ListenAndServe() method to start our server.
4. Function processing method based on WebSocket protocol
WebSocket is a full-duplex protocol, usually used to implement instant communication functions, such as online games, instant chat, etc. In Golang, we can use the gorilla/websocket package to create a WebSocket server. The code is as follows:
package main import ( "net/http" "github.com/gorilla/websocket" ) var upgrader = websocket.Upgrader{ ReadBufferSize: 1024, WriteBufferSize: 1024, } func handler(w http.ResponseWriter, r *http.Request) { conn, err := upgrader.Upgrade(w, r, nil) if err != nil { return } defer conn.Close() for { _, message, err := conn.ReadMessage() if err != nil { return } conn.WriteMessage(websocket.TextMessage, []byte("Hello, world!")) } } func main() { http.HandleFunc("/", handler) http.ListenAndServe(":8080", nil) }
In the above code, we use the gorilla/websocket package to create a WebSocket server and define handler( ) function to handle WebSocket connections. Finally, we use the http.HandleFunc() and http.ListenAndServe() methods to start our server.
Summary
Whether it is TCP, UDP, HTTP or WebSocket protocol, Golang provides a rich function library to help us quickly build servers and handle various network communications. By learning the above four protocols and Golang's processing methods, I believe you will be able to better understand functional programming and be able to use Golang more flexibly to implement various network applications.
The above is the detailed content of Golang function tcp, udp, http and websocket processing methods. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

Reading and writing files safely in Go is crucial. Guidelines include: Checking file permissions Closing files using defer Validating file paths Using context timeouts Following these guidelines ensures the security of your data and the robustness of your application.

How to configure connection pooling for Go database connections? Use the DB type in the database/sql package to create a database connection; set MaxOpenConns to control the maximum number of concurrent connections; set MaxIdleConns to set the maximum number of idle connections; set ConnMaxLifetime to control the maximum life cycle of the connection.

The learning curve of the Go framework architecture depends on familiarity with the Go language and back-end development and the complexity of the chosen framework: a good understanding of the basics of the Go language. It helps to have backend development experience. Frameworks that differ in complexity lead to differences in learning curves.

The Go framework stands out due to its high performance and concurrency advantages, but it also has some disadvantages, such as being relatively new, having a small developer ecosystem, and lacking some features. Additionally, rapid changes and learning curves can vary from framework to framework. The Gin framework is a popular choice for building RESTful APIs due to its efficient routing, built-in JSON support, and powerful error handling.

Best practices: Create custom errors using well-defined error types (errors package) Provide more details Log errors appropriately Propagate errors correctly and avoid hiding or suppressing Wrap errors as needed to add context

In Go framework development, common challenges and their solutions are: Error handling: Use the errors package for management, and use middleware to centrally handle errors. Authentication and authorization: Integrate third-party libraries and create custom middleware to check credentials. Concurrency processing: Use goroutines, mutexes, and channels to control resource access. Unit testing: Use gotest packages, mocks, and stubs for isolation, and code coverage tools to ensure sufficiency. Deployment and monitoring: Use Docker containers to package deployments, set up data backups, and track performance and errors with logging and monitoring tools.

Common problems and solutions in Go framework dependency management: Dependency conflicts: Use dependency management tools, specify the accepted version range, and check for dependency conflicts. Vendor lock-in: Resolved by code duplication, GoModulesV2 file locking, or regular cleaning of the vendor directory. Security vulnerabilities: Use security auditing tools, choose reputable providers, monitor security bulletins and keep dependencies updated.

JSON data can be saved into a MySQL database by using the gjson library or the json.Unmarshal function. The gjson library provides convenience methods to parse JSON fields, and the json.Unmarshal function requires a target type pointer to unmarshal JSON data. Both methods require preparing SQL statements and performing insert operations to persist the data into the database.
