[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"academy-blogs-en-1-1-all-go-error-handling-logging-websocket-all--*":3,"academy-blog-translations-ekazjrk1qx2ebbw":139},{"data":4,"page":127,"perPage":127,"totalItems":127,"totalPages":127},[5],{"alt":6,"collectionId":7,"collectionName":8,"content":9,"cover_image":10,"cover_image_path":11,"created":12,"created_by":13,"expand":14,"id":133,"keywords":134,"locale":109,"published_at":135,"scheduled_at":13,"school_blog":131,"short_description":136,"slug":137,"status":129,"title":6,"updated":138,"updated_by":13,"views":132},"Ep.24 Go and Error Handling & Logging on WebSocket - Enhancing the Stability of Your System!","sclblg987654321","school_blog_translations","\u003Cp class=\"p1\">\u003Cstrong>Go and Error Handling & Logging on WebSocket - Enhancing the Stability of Your System!\u003C\u002Fstrong>\u003C\u002Fp>\u003Cp class=\"p2\"> \u003C\u002Fp>\u003Cp class=\"p3\">\u003Cstrong>Why Manage Error and Logging on WebSocket?\u003C\u002Fstrong>\u003Cbr>WebSocket is a real-time protocol, and if errors occur (such as disconnections), it can affect user experience. Having an error handling and logging system helps to :\u003C\u002Fp>\u003Cul class=\"ul1\">\u003Cli class=\"li3\">Monitor anomalies, such as connection failures or incorrect messages.\u003C\u002Fli>\u003Cli class=\"li3\">Debug issues quickly by reviewing log data.\u003C\u002Fli>\u003Cli class=\"li3\">Increase system stability through automated error management.\u003C\u002Fli>\u003C\u002Ful>\u003Cp class=\"p2\"> \u003C\u002Fp>\u003Cp class=\"p3\">\u003Cstrong>How to Handle Errors on WebSocket\u003C\u002Fstrong>\u003C\u002Fp>\u003Cp class=\"p3\">1. Check for Errors During Connection\u003Cbr>Every time a WebSocket connection is established, we should check for errors to ensure the connection is successful.\u003Cbr>In this example :\u003Cbr>If an error occurs, an HTTP error message will be sent back to the user, and the error will be logged.\u003Cbr>Example :\u003C\u002Fp>\u003Cpre>\u003Ccode class=\"language-plaintext\">conn, err := upgrader.Upgrade(w, r, nil)\r\nif err != nil {\r\n    log.Println(\"Failed to upgrade connection:\", err)\r\n    http.Error(w, \"Could not open WebSocket connection\", http.StatusBadRequest)\r\n    return\r\n}\r\u003C\u002Fcode>\u003C\u002Fpre>\u003Cp> \u003C\u002Fp>\u003Cp class=\"p3\">2. Handle Errors While Sending and Receiving Messages\u003Cbr>Errors may occur when the client disconnects or sends messages in an incorrect format.\u003Cbr>In this example :\u003Cbr>Use break to terminate the connection when an error occurs.\u003C\u002Fp>\u003Cpre>\u003Ccode class=\"language-plaintext\">for {\r\n    _, msg, err := conn.ReadMessage()\r\n    if err != nil {\r\n        log.Println(\"Error reading message:\", err)\r\n        break \u002F\u002F ปิดการเชื่อมต่อเมื่อเกิด Error\r\n    }\r\n\r\n    if err := conn.WriteMessage(websocket.TextMessage, msg); err != nil {\r\n        log.Println(\"Error writing message:\", err)\r\n        break\r\n    }\r\n}\r\u003C\u002Fcode>\u003C\u002Fpre>\u003Cp> \u003C\u002Fp>\u003Cp class=\"p3\">3. Detect Disconnections\u003Cbr>When a client disconnects, we can detect the error and take action to remove the connection from the system.\u003Cbr>Example :\u003C\u002Fp>\u003Cpre>\u003Ccode class=\"language-plaintext\">if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseAbnormalClosure) {\r\n    log.Printf(\"Unexpected close error: %v\", err)\r\n}\r\u003C\u002Fcode>\u003C\u002Fpre>\u003Cp class=\"p2\"> \u003C\u002Fp>\u003Cp class=\"p3\">\u003Cstrong>Logging for Monitoring\u003C\u002Fstrong>\u003C\u002Fp>\u003Cp class=\"p3\">1. Log Important Events\u003Cbr>We can use log.Println to record events such as new connections, disconnections, and messages sent between the server and clients.\u003Cbr>Example :\u003C\u002Fp>\u003Cpre>\u003Ccode class=\"language-plaintext\">log.Println(\"New client connected\")\r\ndefer log.Println(\"Client disconnected\")\r\u003C\u002Fcode>\u003C\u002Fpre>\u003Cp class=\"p3\"> \u003C\u002Fp>\u003Cp class=\"p3\">2. Log to a File\u003Cbr>Instead of printing logs to the screen, we can save logs to a file for future reference.\u003Cbr>Example :\u003C\u002Fp>\u003Cpre>\u003Ccode class=\"language-plaintext\">file, err := os.OpenFile(\"websocket.log\", os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)\r\nif err != nil {\r\n    log.Fatal(err)\r\n}\r\ndefer file.Close()\r\n\r\nlog.SetOutput(file) \u002F\u002F บันทึก Log ลงไฟล์\r\nlog.Println(\"WebSocket server started\")\r\u003C\u002Fcode>\u003C\u002Fpre>\u003Cp> \u003C\u002Fp>\u003Cp class=\"p3\">\u003Cstrong>Example of Error Handling and Logging on WebSocket\u003C\u002Fstrong>\u003Cbr>In this example:\u003Cbr>Log all important events to the file websocket.log, and check and manage errors during the connection process and while sending messages.\u003C\u002Fp>\u003Cpre>\u003Ccode class=\"language-plaintext\">package main\r\n\r\nimport (\r\n    \"log\"\r\n    \"net\u002Fhttp\"\r\n    \"os\"\r\n\r\n    \"github.com\u002Fgorilla\u002Fwebsocket\"\r\n)\r\n\r\nvar upgrader = websocket.Upgrader{\r\n    CheckOrigin: func(r *http.Request) bool {\r\n        return true\r\n    },\r\n}\r\n\r\nfunc handleConnections(w http.ResponseWriter, r *http.Request) {\r\n    conn, err := upgrader.Upgrade(w, r, nil)\r\n    if err != nil {\r\n        log.Println(\"Error upgrading connection:\", err)\r\n        return\r\n    }\r\n    defer conn.Close()\r\n\r\n    log.Println(\"New client connected\")\r\n\r\n    for {\r\n        _, msg, err := conn.ReadMessage()\r\n        if err != nil {\r\n            if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseAbnormalClosure) {\r\n                log.Printf(\"Unexpected close error: %v\", err)\r\n            }\r\n            log.Println(\"Connection closed\")\r\n            break\r\n        }\r\n\r\n        log.Printf(\"Received message: %s\", msg)\r\n\r\n        if err := conn.WriteMessage(websocket.TextMessage, msg); err != nil {\r\n            log.Println(\"Error writing message:\", err)\r\n            break\r\n        }\r\n    }\r\n}\r\n\r\nfunc main() {\r\n    file, err := os.OpenFile(\"websocket.log\", os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)\r\n    if err != nil {\r\n        log.Fatal(err)\r\n    }\r\n    defer file.Close()\r\n\r\n    log.SetOutput(file)\r\n\r\n    http.HandleFunc(\"\u002Fws\", handleConnections)\r\n    log.Println(\"WebSocket server started at :8080\u002Fws\")\r\n    http.ListenAndServe(\":8080\", nil)\r\n}\r\u003C\u002Fcode>\u003C\u002Fpre>\u003Cp class=\"p2\"> \u003C\u002Fp>\u003Cp class=\"p3\">\u003Cstrong>In Summary\u003C\u002Fstrong>\u003C\u002Fp>\u003Cul class=\"ul1\">\u003Cli class=\"li3\">Use log.Println to log important events.\u003C\u002Fli>\u003Cli class=\"li3\">Check and handle errors at every step of WebSocket communication.\u003C\u002Fli>\u003Cli class=\"li3\">Log to a file for future reference.\u003C\u002Fli>\u003Cli class=\"li3\">Use websocket.IsUnexpectedCloseError to detect unexpected disconnections.\u003C\u002Fli>\u003C\u002Ful>","18_11zon_4encofkcmd.webp","https:\u002F\u002Ftwsme-r2.tumwebsme.com\u002Fsclblg987654321\u002F6774gn6xgji1b2k\u002F18_11zon_4encofkcmd.webp","2026-03-04 08:34:18.051Z","",{"keywords":15,"locale":103,"school_blog":113},[16,23,28,33,38,43,48,53,58,63,68,73,78,83,88,93,98],{"collectionId":17,"collectionName":18,"created":19,"created_by":13,"id":20,"name":21,"updated":22,"updated_by":13},"sclkey987654321","school_keywords","2026-03-04 08:20:11.547Z","ey3puyme01a9bsw","Go","2026-04-10 16:07:25.893Z",{"collectionId":17,"collectionName":18,"created":24,"created_by":13,"id":25,"name":26,"updated":27,"updated_by":13},"2026-03-04 08:33:59.315Z","btmgtfwmgpke1aa","Go language","2026-04-10 16:08:04.625Z",{"collectionId":17,"collectionName":18,"created":29,"created_by":13,"id":30,"name":31,"updated":32,"updated_by":13},"2026-03-04 08:20:14.253Z","ah6lvy4x8qe08l5","Golang","2026-04-10 16:07:26.172Z",{"collectionId":17,"collectionName":18,"created":34,"created_by":13,"id":35,"name":36,"updated":37,"updated_by":13},"2026-03-04 08:34:00.920Z","ecac9y661or1xka","WebSocket","2026-04-10 16:08:05.227Z",{"collectionId":17,"collectionName":18,"created":39,"created_by":13,"id":40,"name":41,"updated":42,"updated_by":13},"2026-03-04 08:24:43.639Z","mjcndls2y3h9ob6","Error Handling","2026-04-10 16:07:29.897Z",{"collectionId":17,"collectionName":18,"created":44,"created_by":13,"id":45,"name":46,"updated":47,"updated_by":13},"2026-03-04 08:34:15.526Z","m0b6rvfafty5n2x","Error Management","2026-04-10 16:08:10.704Z",{"collectionId":17,"collectionName":18,"created":49,"created_by":13,"id":50,"name":51,"updated":52,"updated_by":13},"2026-03-04 08:33:55.302Z","0mue4zt83jcdtq9","Logging","2026-04-10 16:08:03.396Z",{"collectionId":17,"collectionName":18,"created":54,"created_by":13,"id":55,"name":56,"updated":57,"updated_by":13},"2026-03-04 08:34:16.198Z","51skcgz7m3ieokm","Logging 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08:32:26.073Z","vnvj1oaxje9m1q8","programming for beginners","2026-04-10 16:07:54.133Z",{"collectionId":17,"collectionName":18,"created":84,"created_by":13,"id":85,"name":86,"updated":87,"updated_by":13},"2026-03-04 08:31:49.362Z","2m9vv13etpn6zkx","programming language","2026-04-10 16:07:45.606Z",{"collectionId":17,"collectionName":18,"created":89,"created_by":13,"id":90,"name":91,"updated":92,"updated_by":13},"2026-03-04 08:20:33.316Z","ln1ntwattzmxo0o","programming","2026-04-10 16:07:27.299Z",{"collectionId":17,"collectionName":18,"created":94,"created_by":13,"id":95,"name":96,"updated":97,"updated_by":13},"2026-03-04 08:31:54.955Z","264sfjffyhspetq","programmers","2026-04-10 16:07:47.221Z",{"collectionId":17,"collectionName":18,"created":99,"created_by":13,"id":100,"name":101,"updated":102,"updated_by":13},"2026-03-04 08:26:59.195Z","gab60xd583s3qaw","Superdev School","2026-04-10 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04:39:38.440Z","published","2026-04-25 02:32:15.470Z","ekazjrk1qx2ebbw",297,"6774gn6xgji1b2k",[20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95,100],"2025-01-27 04:40:47.537Z","Learn how to manage Error and Logging on WebSocket to improve stability and user experience.","go-error-handling-logging-websocket","2026-04-25 02:47:30.792Z",{"en":137}]