{"id":84718,"date":"2025-02-28T09:00:48","date_gmt":"2025-02-28T02:00:48","guid":{"rendered":"https:\/\/itviec.com\/blog\/?p=84718"},"modified":"2025-02-28T09:00:48","modified_gmt":"2025-02-28T02:00:48","slug":"cau-hoi-phong-van-json","status":"publish","type":"post","link":"https:\/\/itviec.com\/blog\/cau-hoi-phong-van-json\/","title":{"rendered":"Top 30+ c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON th\u01b0\u1eddng g\u1eb7p nh\u1ea5t"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed9i dung b\u00e0i vi\u1ebft<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/itviec.com\/blog\/cau-hoi-phong-van-json\/#JSON_la_gi\" >JSON l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/itviec.com\/blog\/cau-hoi-phong-van-json\/#Cau_hoi_phong_van_JSON_co_ban_danh_cho_Fresher_va_Junior_Developer\" >C\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON c\u01a1 b\u1ea3n d\u00e0nh cho Fresher v\u00e0 Junior Developer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/itviec.com\/blog\/cau-hoi-phong-van-json\/#Cau_hoi_phong_van_JSON_nang_cao_danh_cho_Middle_va_Senior_Developer\" >C\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON n\u00e2ng cao d\u00e0nh cho Middle v\u00e0 Senior Developer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/itviec.com\/blog\/cau-hoi-phong-van-json\/#Cau_hoi_phong_van_JSON_xu_ly_tinh_huong\" >C\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON x\u1eed l\u00fd t\u00ecnh hu\u1ed1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/itviec.com\/blog\/cau-hoi-phong-van-json\/#Tong_ket_cau_hoi_phong_van_JSON\" >T\u1ed5ng k\u1ebft c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON\u00a0<\/a><\/li><\/ul><\/nav><\/div>\n<p><em><strong>C\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON th\u01b0\u1eddng xoay quanh kh\u00e1i ni\u1ec7m, c\u1ea5u tr\u00fac, c\u00e1ch s\u1eed d\u1ee5ng v\u00e0 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c l\u00e0m vi\u1ec7c v\u1edbi JSON. B\u00e0i vi\u1ebft s\u1ebd t\u1ed5ng h\u1ee3p c\u00e1c c\u00e2u h\u1ecfi v\u1ec1 JSON th\u01b0\u1eddng g\u1eb7p \u0111i k\u00e8m c\u00e2u tr\u1ea3 l\u1eddi c\u1ee5 th\u1ec3 s\u1ebd gi\u00fap b\u1ea1n t\u1ef1 tin h\u01a1n khi b\u01b0\u1edbc v\u00e0o bu\u1ed5i ph\u1ecfng v\u1ea5n.<\/strong><\/em><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u1ecdc b\u00e0i vi\u1ebft sau \u0111\u1ec3 c\u00f3 g\u00f3c nh\u00ecn chi ti\u1ebft h\u01a1n v\u1ec1:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON c\u01a1 b\u1ea3n d\u00e0nh cho Fresher v\u00e0 Junior Developer<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON n\u00e2ng cao d\u00e0nh cho Middle v\u00e0 Senior Developer<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON x\u1eed l\u00fd t\u00ecnh hu\u1ed1ng.<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"JSON_la_gi\"><\/span><b>JSON l\u00e0 g\u00ec?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">JSON (JavaScript Object Nation) l\u00e0 m\u1ed9t \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong l\u1eadp tr\u00ecnh \u1ee9ng d\u1ee5ng web hay ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m. \u0110\u00e2y l\u00e0 m\u1ed9t d\u1eef li\u1ec7u c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ed9c l\u1eadp v\u1edbi <\/span><strong><a href=\"https:\/\/itviec.com\/blog\/javascript-la-gi\/\" target=\"_blank\" rel=\"noopener\">JavaScript<\/a><\/strong><span style=\"font-weight: 400;\"> v\u00e0 h\u1ea7u h\u1ebft c\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh hi\u1ec7n nay \u0111\u1ec1u c\u00f3 th\u1ec3 \u0111\u1ecdc c\u0169ng nh\u01b0 ph\u00e2n t\u00edch m\u00e3 JSON.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">B\u00ean c\u1ea1nh \u0111\u00f3, JSON \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 d\u1ec5 d\u00e0ng \u0111\u1ecdc v\u00e0 ghi, ch\u1ee7 y\u1ebfu d\u00f9ng \u0111\u1ec3 truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u gi\u1eefa c\u00e1c h\u1ec7 th\u1ed1ng m\u00e1y t\u00ednh, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c \u1ee9ng d\u1ee5ng web. \u0110\u1ecbnh d\u1ea1ng n\u00e0y s\u1ebd d\u1ec5 s\u1eed d\u1ee5ng v\u00e0 kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh, gi\u00fap gi\u1ea3m thi\u1ec3u s\u1ef1 ph\u1ee9c t\u1ea1p trong vi\u1ec7c chia s\u1ebb d\u1eef li\u1ec7u gi\u1eefa c\u00e1c h\u1ec7 th\u1ed1ng kh\u00e1c nhau.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">JSON c\u00f3 c\u1ea5u tr\u00fac d\u1eef li\u1ec7u d\u1ea1ng key-value (kh\u00f3a-gi\u00e1 tr\u1ecb) \u0111\u01a1n gi\u1ea3n, v\u1edbi c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng (object) \u0111\u01b0\u1ee3c bao b\u1ecdc trong d\u1ea5u ngo\u1eb7c nh\u1ecdn {} v\u00e0 c\u00e1c m\u1ea3ng (array) trong d\u1ea5u ngo\u1eb7c vu\u00f4ng [].<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">{<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\"name\": \"ITviec\",<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\"age\": 25,<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\"city\": \"Ho Chi Minh City\"<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<blockquote><p><em>\u0110\u1ecdc th\u00eam: <strong><a href=\"https:\/\/itviec.com\/blog\/json-la-gi\/\" target=\"_blank\" rel=\"noopener\">JSON l\u00e0 g\u00ec? C\u00e1c lo\u1ea1i d\u1eef li\u1ec7u JSON l\u00e0 g\u00ec v\u00e0 \u00e1p d\u1ee5ng th\u1ebf n\u00e0o?<\/a><\/strong><\/em><\/p><\/blockquote>\n<p><span style=\"font-weight: 400;\">JSON \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c c\u00f4ng ngh\u1ec7, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c v\u1ecb tr\u00ed c\u00f4ng vi\u1ec7c li\u00ean quan \u0111\u1ebfn ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m, l\u1eadp tr\u00ecnh web v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u nh\u01b0 Front-End Developer, Back-end Developer hay Data Engineer\/Data Analyst.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">B\u00ean c\u1ea1nh \u0111\u00f3, \u0110\u1ec3 th\u00e0nh c\u00f4ng trong c\u00e1c c\u00f4ng vi\u1ec7c li\u00ean quan \u0111\u1ebfn JSON, b\u1ea1n kh\u00f4ng ch\u1ec9 c\u1ea7n hi\u1ec3u v\u1ec1 c\u1ea5u tr\u00fac c\u1ee7a JSON m\u00e0 c\u00f2n c\u1ea7n ph\u00e1t tri\u1ec3n th\u00eam c\u00e1c k\u1ef9 n\u0103ng li\u00ean quan nh\u01b0:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">HTML, CSS v\u00e0 JavaScript.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><a href=\"https:\/\/itviec.com\/blog\/python-la-gi\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">Python<\/span><\/a><span style=\"font-weight: 400;\">, Java<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">K\u1ef9 n\u0103ng l\u00e0m vi\u1ec7c v\u1edbi API.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ki\u1ebfn th\u1ee9c v\u1ec1 c\u01a1 s\u1edf d\u1eef li\u1ec7u <\/span><a href=\"https:\/\/itviec.com\/blog\/nosql-la-gi\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">NoSQL<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Cau_hoi_phong_van_JSON_co_ban_danh_cho_Fresher_va_Junior_Developer\"><\/span><b> C\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON c\u01a1 b\u1ea3n d\u00e0nh cho Fresher v\u00e0 Junior Developer<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><b>Gi\u1ea3i th\u00edch c\u00e1ch chuy\u1ec3n v\u0103n b\u1ea3n JSON th\u00e0nh \u0111\u1ed1i t\u01b0\u1ee3ng JavaScript?\u00a0<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">M\u1ed9t trong nh\u1eefng c\u00e1ch s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn \u0111\u1ec3 chuy\u1ec3n v\u0103n b\u1ea3n JSON th\u00e0nh \u0111\u1ed1i t\u01b0\u1ee3ng JavaScript l\u00e0 thu th\u1eadp d\u1eef li\u1ec7u JSON t\u1eeb m\u00e1y ch\u1ee7 web d\u01b0\u1edbi d\u1ea1ng t\u1ec7p ho\u1eb7c y\u00eau c\u1ea7u HTTP. T\u1eeb \u0111\u00f3 chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u JSON th\u00e0nh JavaScript, sau \u0111\u00f3 s\u1eed d\u1ee5ng d\u1eef li\u1ec7u trong trang web.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">B\u00ean c\u1ea1nh \u0111\u00f3, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng th\u1ee9c JSON.parse(). Ph\u01b0\u01a1ng th\u1ee9c n\u00e0y s\u1ebd ph\u00e2n t\u00edch c\u00fa ph\u00e1p chu\u1ed7i JSON v\u00e0 tr\u1ea3 v\u1ec1 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng JavaScript t\u01b0\u01a1ng \u1ee9ng.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">let jsonString = '{\"name\": \"ITviec\", \"age\": 25}';<\/span>\r\n<span style=\"font-weight: 400;\">let obj = JSON.parse(jsonString);<\/span>\r\n<span style=\"font-weight: 400;\">console.log(obj.name); \/\/ K\u1ebft qu\u1ea3: ITviec<\/span><\/pre>\n<h3><b>Gi\u1ea3i th\u00edch v\u1ec1 quy t\u1eafc c\u00fa ph\u00e1p c\u1ee7a JSON? T\u1eeb \u0111\u00f3 \u0111\u01b0a ra m\u1ed9t v\u00ed d\u1ee5 v\u1ec1 \u0111\u1ed1i t\u01b0\u1ee3ng JSON\u00a0<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">JSON c\u00f3 c\u00e1c quy t\u1eafc c\u00fa ph\u00e1p \u0111\u01a1n gi\u1ea3n:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">D\u1eef li\u1ec7u n\u1eb1m trong c\u1eb7p kh\u00f3a-gi\u00e1 tr\u1ecb v\u00e0 \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng d\u1ea5u ph\u1ea9y.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00e1c c\u1eb7p kh\u00f3a-gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1edfi d\u1ea5u hai ch\u1ea5m :.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">D\u1ea5u ngo\u1eb7c nh\u1ecdn {} gi\u1eef \u0111\u1ed1i t\u01b0\u1ee3ng (object), d\u1ea5u ngo\u1eb7c vu\u00f4ng [] gi\u1eef m\u1ea3ng (array).\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Kh\u00f3a ph\u1ea3i l\u00e0 chu\u1ed7i (string), \u0111\u01b0\u1ee3c bao quanh b\u1edfi d\u1ea5u ngo\u1eb7c k\u00e9p &#8221; &#8220;.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Gi\u00e1 tr\u1ecb c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t chu\u1ed7i, s\u1ed1, \u0111\u1ed1i t\u01b0\u1ee3ng, m\u1ea3ng, gi\u00e1 tr\u1ecb boolean ho\u1eb7c null.<\/span><\/li>\n<\/ul>\n<pre><span style=\"font-weight: 400;\">{<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\"name\": \"ITviec\",<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\"age\": 30,<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\"isStudent\": false<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<h3><b>B\u1ea1n hi\u1ec3u g\u00ec v\u1ec1 JSON-RPC v\u00e0 JSON Parser?<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>JSON RPC: <\/b><span style=\"font-weight: 400;\">\u0110\u00e2y l\u00e0 giao th\u1ee9c g\u1ecdi t\u1eeb xa \u0111\u01a1n gi\u1ea3n gi\u1ed1ng nh\u01b0 XML-RPC m\u1eb7c d\u00f9 n\u00f3 s\u1eed d\u1ee5ng \u0111\u1ecbnh d\u1ea1ng JSON nh\u1eb9 thay v\u00ec XML.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>JSON Parser: <\/b><span style=\"font-weight: 400;\">JSON parser \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n t\u00edch d\u1eef li\u1ec7u JSON th\u00e0nh c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ec3 s\u1eed d\u1ee5ng gi\u00e1 tr\u1ecb c\u1ee7a n\u00f3. N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch b\u1eb1ng JavaScript, PHP v\u00e0 jQuery.<\/span><\/li>\n<\/ul>\n<h3><b>Gi\u1ea3i th\u00edch v\u1ec1 c\u1ea5u tr\u00fac v\u00e0 \u0111\u1ecbnh d\u1ea1ng c\u1ee7a JSON.<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">\u0110\u1ecbnh d\u1ea1ng JSON tu\u00e2n theo c\u1ea5u tr\u00fac c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng JavaScript, ch\u1ee9a c\u00e1c c\u1eb7p kh\u00f3a-gi\u00e1 tr\u1ecb (key-value). Trong \u0111\u00f3, key th\u00ec lu\u00f4n l\u00e0 chu\u1ed7i v\u00e0 \u0111\u01b0\u1ee3c \u0111\u1eb7t trong d\u1ea5u nh\u00e1y \u0111\u1ed5i, value c\u00f3 th\u1ec3 l\u00e0 chu\u1ed7i, s\u1ed1, boolean,&#8230; \u0111\u01b0\u1ee3c truy\u1ec1n t\u1eeb m\u00e1y ch\u1ee7 \u0111\u1ebfn \u1ee9ng d\u1ee5ng web v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. C\u00e1c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong JSON c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy xu\u1ea5t theo c\u00f9ng c\u00e1ch m\u00e0 c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng JavaScript \u0111\u01b0\u1ee3c truy xu\u1ea5t.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">{<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\"name\": \"Alice\",<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\"age\": 30,<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\"isStudent\": false,<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\"hobbies\": [\"reading\", \"coding\"],<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\"address\": {<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\"city\": \"Hanoi\",<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\"country\": \"Vietnam\"<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0},<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\"scores\": null<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<h3><b>D\u1eef li\u1ec7u JSON \u0111\u01b0\u1ee3c truy\u1ec1n t\u1eeb backend \u0111\u1ebfn frontend nh\u01b0 th\u1ebf n\u00e0o?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">D\u1eef li\u1ec7u s\u1ebd \u0111\u01b0\u1ee3c g\u1eedi d\u01b0\u1edbi d\u1ea1ng chu\u1ed7i JSON b\u1eb1ng JSON.Stringify t\u1eeb ph\u1ea7n ph\u1ee5 tr\u1ee3 \u0111\u1ebfn ph\u1ea7n giao di\u1ec7n qua HTTP.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">JSON.stringify({name: \"ITviec\", age: 30}<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">Frontend ph\u00e2n t\u00edch chu\u1ed7i JSON b\u1eb1ng JSON.Parse \u0111\u1ec3 s\u1eed d\u1ee5ng n\u00f3 nh\u01b0 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng JavaScript.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">const obj = JSON.parse('{\"name\": \"ITviec\", \"age\": 30}')<\/span>\r\n<span style=\"font-weight: 400;\">let personName = obj.name;<\/span>\r\n<span style=\"font-weight: 400;\">let personAge = obj.age;<\/span><\/pre>\n<h3><b>S\u1ef1 kh\u00e1c nhau gi\u1eefa JSON v\u00e0 JavaScript Object l\u00e0 g\u00ec?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">JSON l\u00e0 \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u d\u00f9ng \u0111\u1ec3 l\u01b0u tr\u1eef v\u00e0 truy\u1ec1n t\u1ea3i th\u00f4ng tin gi\u1eefa c\u00e1c h\u1ec7 th\u1ed1ng, ch\u1ec9 ch\u1ee9a d\u1eef li\u1ec7u v\u00e0 kh\u00f4ng c\u00f3 ph\u01b0\u01a1ng th\u1ee9c (method).\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Trong khi \u0111\u00f3, JavaScript Objects l\u00e0 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng trong JavaScript c\u00f3 th\u1ec3 ch\u1ee9a d\u1eef li\u1ec7u v\u00e0 ph\u01b0\u01a1ng th\u1ee9c. \u0110\u1ed1i t\u01b0\u1ee3ng JavaScript c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u1ef1c ti\u1ebfp trong m\u00e3 JavaScript, trong khi JSON l\u00e0 m\u1ed9t chu\u1ed7i v\u0103n b\u1ea3n.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ngo\u00e0i ra, gi\u1eefa c\u1ea3 hai c\u00f2n c\u00f3 m\u1ed9t s\u1ed1 \u0111i\u1ec3m kh\u00e1c bi\u1ec7t nh\u01b0:<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>Ti\u00eau ch\u00ed<\/b><\/td>\n<td><b>JSON<\/b><\/td>\n<td><b>JavaScript Object<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">C\u00fa ph\u00e1p<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ef1a tr\u00ean v\u0103n b\u1ea3n v\u1edbi c\u00e1c quy t\u1eafc nghi\u00eam ng\u1eb7t (d\u1ea5u ngo\u1eb7c k\u00e9p, kh\u00f4ng c\u00f3 d\u1ea5u ph\u1ea9y theo sau).<\/span><\/td>\n<td><span style=\"font-weight: 400;\">C\u00f3 th\u1ec3 bao g\u1ed3m c\u00e1c h\u00e0m, kh\u00f4ng x\u00e1c \u0111\u1ecbnh, k\u00fd hi\u1ec7u,&#8230;<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u1ee8ng d\u1ee5ng<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\u0110\u1ecbnh d\u1ea1ng trao \u0111\u1ed5i d\u1eef li\u1ec7u.<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thao t\u00e1c d\u1eef li\u1ec7u trong m\u00e3.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Ph\u00e2n t\u00edch c\u00fa ph\u00e1p<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Y\u00eau c\u1ea7u ph\u00e2n t\u00edch c\u00fa ph\u00e1p th\u00f4ng qua JSON.parse<\/span><\/td>\n<td><span style=\"font-weight: 400;\">C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng tr\u1ef1c ti\u1ebfp trong JavaScript.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><b>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng JavaScript th\u00e0nh JSON?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">\u0110\u1ec3 chuy\u1ec3n \u0111\u1ed5i JavaScript Object th\u00e0nh JSON, d\u00f9ng JSON.stringify()<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">const obj = {name: \"ITviec\", age: 30};<\/span>\r\n<span style=\"font-weight: 400;\">const jsonString = JSON.stringify(obj);<\/span>\r\n<span style=\"font-weight: 400;\">console.log(jsonString);\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">\/\/ K\u1ebft qu\u1ea3: '{\"name\":\"ITviec\",\"age\":30}'<\/span><\/pre>\n<h3><b>Vai tr\u00f2 c\u1ee7a c\u00e1c tham s\u1ed1 trong JSON.stringify?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">JSON.stringify c\u00f3 c\u00fa ph\u00e1p <\/span><span style=\"font-weight: 400;\">JSON.stringify(value, replacer, space)<\/span><span style=\"font-weight: 400;\">. V\u1edbi c\u00e1c tham s\u1ed1 c\u00f3 vai tr\u00f2 c\u1ee5 th\u1ec3 nh\u01b0 sau:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>value: <\/b><span style=\"font-weight: 400;\">\u0110\u1ed1i t\u01b0\u1ee3ng \u0111\u1ec3 chuy\u1ec3n th\u00e0nh chu\u1ed7i.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>replacer:<\/b><span style=\"font-weight: 400;\"> M\u1ed9t h\u00e0m ho\u1eb7c m\u1ea3ng \u0111\u1ec3 l\u1ecdc kh\u00f3a.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>space:<\/b><span style=\"font-weight: 400;\"> Th\u00eam th\u1ee5t l\u1ec1 \u0111\u1ec3 d\u1ec5 \u0111\u1ecdc.<\/span><\/li>\n<\/ul>\n<pre><span style=\"font-weight: 400;\">const obj = { name: \"ITviec\", age: 30, city: \"Ho Chi Minh\" };<\/span>\r\n<span style=\"font-weight: 400;\">console.log(JSON.stringify(obj, null, 2));<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">K\u1ebft qu\u1ea3 s\u1ebd \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb nh\u01b0 sau:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">{<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\"name\": \"ITviec\",<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\"age\": 30,<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\"city\": \"Ho Chi Minh\"<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<h3><b>JSON c\u00f3 th\u1ec3 ch\u1ee9a c\u00e1c h\u00e0m kh\u00f4ng?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">C\u00e2u tr\u1ea3 l\u1eddi l\u00e0 Kh\u00f4ng, JSON kh\u00f4ng h\u1ed7 tr\u1ee3 c\u00e1c h\u00e0m ho\u1eb7c gi\u00e1 tr\u1ecb ch\u01b0a x\u00e1c \u0111\u1ecbnh. JSON ch\u1ec9 c\u00f3 th\u1ec3 ch\u1ee9a d\u1eef li\u1ec7u, bao g\u1ed3m c\u00e1c chu\u1ed7i, s\u1ed1, boolean, null, m\u1ea3ng v\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng. C\u00e1c ph\u01b0\u01a1ng th\u1ee9c (h\u00e0m) kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 trong JSON.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">const obj = { name: \"ITviec\", greet: () =&gt; \"Hello!\" };<\/span>\r\n<span style=\"font-weight: 400;\">console.log(JSON.stringify(obj)); \/\/k\u1ebft qu\u1ea3 s\u1ebd ch\u1ec9 hi\u1ec3n th\u1ecb ph\u1ea7n name<\/span><\/pre>\n<p><b>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c tham chi\u1ebfu v\u00f2ng (circular references) v\u1edbi JSON.stringify()?<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Khi s\u1eed d\u1ee5ng JSON.stringify() v\u1edbi c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 tham chi\u1ebfu v\u00f2ng (circular reference), ph\u01b0\u01a1ng th\u1ee9c n\u00e0y s\u1ebd g\u00e2y l\u1ed7i. \u0110\u1ec3 x\u1eed l\u00fd tham chi\u1ebfu v\u00f2ng, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u1ed9t h\u00e0m thay th\u1ebf (replacer) \u0111\u1ec3 lo\u1ea1i b\u1ecf ho\u1eb7c x\u1eed l\u00fd c\u00e1c tham chi\u1ebfu v\u00f2ng.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">const obj = {};<\/span>\r\n<span style=\"font-weight: 400;\">obj.self = obj; \/\/ tham chi\u1ebfu v\u00f2ng<\/span>\r\n\r\n<span style=\"font-weight: 400;\">const jsonS = JSON.stringify(obj, (key, value) =&gt; {<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0if (key === \"self\") return undefined; \/\/ lo\u1ea1i b\u1ecf tham chi\u1ebfu v\u00f2ng<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0return value;<\/span>\r\n<span style=\"font-weight: 400;\">});<\/span>\r\n\r\n<span style=\"font-weight: 400;\">console.log(jsonS); \/\/ k\u1ebft qu\u1ea3 {}<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">Ho\u1eb7c c\u00f3 th\u1ec3 d\u00f9ng c\u00e1ch sau:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">function replacerWithCache() {<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0const cache = new WeakSet();<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0return (key, value) =&gt; {<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if (typeof value === 'object' &amp;&amp; value !== null) {<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if (cache.has(value)) {<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return undefined; \/\/ Tr\u00e1nh tham chi\u1ebfu v\u00f2ng<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0cache.add(value);<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return value;<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0};<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span>\r\n\r\n<span style=\"font-weight: 400;\">const obj = { name: \"ITviec\" };<\/span>\r\n<span style=\"font-weight: 400;\">obj.self = obj;<\/span>\r\n<span style=\"font-weight: 400;\">obj.data = { ref: obj };<\/span>\r\n\r\n<span style=\"font-weight: 400;\">console.log(JSON.stringify(obj, replacerWithCache()));<\/span>\r\n<span style=\"font-weight: 400;\">\/\/ K\u1ebft qu\u1ea3: {\"name\":\"ITviec\"}<\/span><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"Cau_hoi_phong_van_JSON_nang_cao_danh_cho_Middle_va_Senior_Developer\"><\/span><b>C\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON n\u00e2ng cao d\u00e0nh cho Middle v\u00e0 Senior Developer<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><b>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u1ea1o m\u1ed9t m\u1ea3ng JSON?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">M\u1ea3ng JSON t\u01b0\u01a1ng t\u1ef1 nh\u01b0 m\u1ea3ng trong c\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh kh\u00e1c, ch\u1ee9a m\u1ed9t t\u1eadp h\u1ee3p nhi\u1ec1u m\u1ee5c. C\u00e1c m\u1ee5c n\u00e0y c\u00f3 th\u1ec3 l\u00e0 b\u1ea5t k\u1ef3 ki\u1ec3u d\u1eef li\u1ec7u n\u00e0o \u0111\u01b0\u1ee3c JSON h\u1ed7 tr\u1ee3, ch\u1eb3ng h\u1ea1n nh\u01b0 chu\u1ed7i, s\u1ed1, boolean, null, \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1eb7c th\u1eadm ch\u00ed l\u00e0 m\u1ea3ng l\u1ed3ng nhau.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">[\"value1\", 12, true, null]<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">Trong \u0111\u00f3:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">M\u1ea3ng JSON \u0111\u01b0\u1ee3c \u0111\u1eb7t trong d\u1ea5u ngo\u1eb7c vu\u00f4ng [ ].<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00e1c m\u1ee5c trong m\u1ea3ng \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng d\u1ea5u ph\u1ea9y.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">M\u1ea3ng JSON c\u00f3 th\u1ec3 ch\u1ee9a c\u00e1c ki\u1ec3u d\u1eef li\u1ec7u h\u1ed7n h\u1ee3p<\/span><\/li>\n<\/ul>\n<h3><b>M\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t \u0111\u1ec3 thi\u1ebft k\u1ebf API JSON l\u00e0 g\u00ec?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Khi thi\u1ebft k\u1ebf <\/span><a href=\"https:\/\/itviec.com\/blog\/api-la-gi\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">API<\/span><\/a><span style=\"font-weight: 400;\"> JSON, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn nh\u01b0:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">S\u1eed d\u1ee5ng quy \u01b0\u1edbc \u0111\u1eb7t t\u00ean nh\u1ea5t qu\u00e1n (v\u00ed d\u1ee5: camelCase ho\u1eb7c snake_case)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Gi\u1eef c\u1ea5u tr\u00fac ph\u1eb3ng nh\u1ea5t c\u00f3 th\u1ec3 \u0111\u1ec3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng \u0111\u1ecdc.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">S\u1eed d\u1ee5ng danh t\u1eeb s\u1ed1 nhi\u1ec1u cho c\u00e1c \u0111i\u1ec3m cu\u1ed1i t\u00e0i nguy\u00ean.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Bao g\u1ed3m phi\u00ean b\u1ea3n trong API.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cung c\u1ea5p th\u00f4ng b\u00e1o l\u1ed7i r\u00f5 r\u00e0ng v\u00e0 m\u00e3 tr\u1ea1ng th\u00e1i HTTP ph\u00f9 h\u1ee3p.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">S\u1eed d\u1ee5ng c\u00e1c nguy\u00ean t\u1eafc HATEOAS (Si\u00eau v\u0103n b\u1ea3n l\u00e0 c\u00f4ng c\u1ee5 c\u1ee7a tr\u1ea1ng th\u00e1i \u1ee9ng d\u1ee5ng) \u0111\u1ec3 c\u00f3 th\u1ec3 kh\u00e1m ph\u00e1.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">B\u00ean c\u1ea1nh \u0111\u00f3, b\u1ea1n c\u00f3 th\u1ec3 n\u00f3i th\u00eam v\u1ec1 t\u1ea7m quan tr\u1ecdng c\u1ee7a c\u00e1c t\u00e0i li\u1ec7u, gi\u1edbi h\u1ea1n t\u1ed1c \u0111\u1ed9 v\u00e0 c\u00e1c c\u00e2n nh\u1eafc v\u1ec1 b\u1ea3o m\u1eadt trong thi\u1ebft k\u1ebf API. \u0110\u1ed3ng th\u1eddi, c\u0169ng c\u00f3 th\u1ec3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c c\u00f4ng c\u1ee5 nh\u01b0 Swagger ho\u1eb7c OpenAPI \u0111\u1ec3 l\u1eadp t\u00e0i li\u1ec7u v\u00e0 th\u1eed nghi\u1ec7m API.<\/span><\/p>\n<h3><b>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 truy c\u1eadp gi\u00e1 tr\u1ecb c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng JSON b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng d\u1ea5u ngo\u1eb7c vu\u00f4ng?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">C\u00fa ph\u00e1p d\u1ea5u ngo\u1eb7c vu\u00f4ng ([]) cho ph\u00e9p b\u1ea1n truy c\u1eadp gi\u00e1 tr\u1ecb c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng JSON th\u00f4ng qua t\u00ean thu\u1ed9c t\u00ednh d\u01b0\u1edbi d\u1ea1ng chu\u1ed7i. \u0110\u00e2y l\u00e0 c\u00e1ch h\u1eefu \u00edch khi b\u1ea1n c\u1ea7n truy c\u1eadp thu\u1ed9c t\u00ednh v\u1edbi t\u00ean \u0111\u1ed9ng ho\u1eb7c kh\u00f4ng h\u1ee3p l\u1ec7 v\u1edbi c\u00fa ph\u00e1p d\u1ea5u ch\u1ea5m.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">const JObj = {\"name\": \"ITviec\", \"est\": \"2009\"}<\/span>\r\n<span style=\"font-weight: 400;\">console.log(JObj[\"name\"])<\/span>\r\n<span style=\"font-weight: 400;\">console.log(JObj[\"est\"])<\/span><\/pre>\n<h3><b>Gi\u1ea3i th\u00edch JSONP v\u00e0 ch\u00fang c\u00f3 g\u00ec kh\u00e1c bi\u1ec7t so v\u1edbi JSON?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">JSONP l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a JSON with Padding. \u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p g\u1eedi d\u1eef li\u1ec7u JSON c\u00f3 ph\u1ea7n \u0111\u1ec7m \u0111\u1ec3 tr\u00e1nh h\u1ea1n ch\u1ebf mi\u1ec1n kh\u00e1c. \u0110i\u1ec1u n\u00e0y s\u1ebd khi\u1ebfn JSONP c\u00f3 kh\u00e1c bi\u1ec7t so v\u1edbi JSON v\u00ec n\u00f3 cho ph\u00e9p c\u00e1c y\u00eau c\u1ea7u ngu\u1ed3n g\u1ed1c ch\u00e9o.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>JSON: <\/b><span style=\"font-weight: 400;\">D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c tr\u1ea3 v\u1ec1 tr\u1ef1c ti\u1ebfp d\u01b0\u1edbi d\u1ea1ng JSON v\u00e0 y\u00eau c\u1ea7u ph\u1ea3i tu\u00e2n th\u1ee7 c\u00f9ng m\u1ed9t mi\u1ec1n (same-origin policy).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>JSONP:<\/b><span style=\"font-weight: 400;\"> D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c tr\u1ea3 v\u1ec1 th\u00f4ng qua m\u1ed9t h\u00e0m callback, gi\u00fap v\u01b0\u1ee3t qua h\u1ea1n ch\u1ebf c\u00f9ng mi\u1ec1n (CORS).<\/span><\/li>\n<\/ul>\n<h3><b>Nh\u1eefng tr\u00ecnh duy\u1ec7t n\u00e0o c\u00f3 h\u1ed7 tr\u1ee3 JSON?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">JSON \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1edfi t\u1ea5t c\u1ea3 c\u00e1c tr\u00ecnh duy\u1ec7t hi\u1ec7n \u0111\u1ea1i. JSON tu\u00e2n theo c\u00fa ph\u00e1p JavaScript, do \u0111\u00f3 m\u1ecdi tr\u00ecnh duy\u1ec7t \u0111\u1ec1u c\u00f3 h\u1ed7 tr\u1ee3 t\u00edch h\u1ee3p cho JSON. C\u00e1c tr\u00ecnh duy\u1ec7t d\u01b0\u1edbi \u0111\u00e2y h\u1ed7 tr\u1ee3 JSON:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Google Chrome<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Mozilla Firefox<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Safari<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Microsoft Edge<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Opera\u2026v..v<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">H\u1ea7u h\u1ebft c\u00e1c tr\u00ecnh duy\u1ec7t n\u00e0y \u0111\u1ec1u h\u1ed7 tr\u1ee3 hai ph\u01b0\u01a1ng th\u1ee9c ch\u00ednh c\u1ee7a JSON: JSON.parse() \u0111\u1ec3 ph\u00e2n t\u00edch c\u00fa ph\u00e1p v\u00e0 JSON.stringify() \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i \u0111\u1ed1i t\u01b0\u1ee3ng JavaScript th\u00e0nh chu\u1ed7i JSON.<\/span><\/p>\n<h3><b>B\u1ea1n hi\u1ec3u g\u00ec v\u1ec1 JSON schema?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">JSON schema l\u00e0 ng\u00f4n ng\u1eef ch\u1ec9 \u0111\u1ecbnh n\u1ed9i dung \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a \u0111\u1ec3 x\u00e1c th\u1ef1c c\u1ea5u tr\u00fac v\u00e0 \u0111\u1ecbnh d\u1ea1ng c\u1ee7a d\u1eef li\u1ec7u JSON ho\u1eb7c chu\u1ed7i. \u0110\u00e2y l\u00e0 \u0111\u1ecbnh d\u1ea1ng d\u1ef1a tr\u00ean JSON \u0111\u1ec3 m\u00f4 t\u1ea3 c\u1ea5u tr\u00fac, n\u1ed9i dung v\u00e0 \u1edf m\u1ed9t m\u1ee9c \u0111\u1ed9 n\u00e0o \u0111\u00f3 l\u00e0 ng\u1eef ngh\u0129a c\u1ee7a c\u00e1c t\u00e0i li\u1ec7u JSON.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">B\u1ea1n c\u00f3 th\u1ec3 nh\u1ea5n m\u1ea1nh r\u1eb1ng JSON schema s\u1ebd cho ph\u00e9p:\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">X\u00e1c \u0111\u1ecbnh c\u00e1c thu\u1ed9c t\u00ednh b\u1eaft bu\u1ed9c.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ch\u1ec9 \u0111\u1ecbnh ki\u1ec3u d\u1eef li\u1ec7u cho c\u00e1c gi\u00e1 tr\u1ecb.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u0110\u1eb7t r\u00e0ng bu\u1ed9c cho c\u00e1c gi\u00e1 tr\u1ecb (v\u00ed d\u1ee5: t\u1ed1i thi\u1ec3u, t\u1ed1i \u0111a).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ghi l\u1ea1i c\u1ea5u tr\u00fac d\u1ef1 \u0111\u1ecbnh c\u1ee7a d\u1eef li\u1ec7u JSON.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">B\u00ean c\u1ea1nh \u0111\u00f3, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 n\u00f3i th\u00eam v\u1ec1 t\u1ea7m quan tr\u1ecdng c\u1ee7a JSON schema trong vi\u1ec7c duy tr\u00ec t\u00ednh tr\u1ecdn v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u, c\u1ea3i thi\u1ec7n v\u00e0 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i cho vi\u1ec7c giao ti\u1ebfp gi\u1eefa Front-end v\u00e0 Back-end. Ngo\u00e0i ra, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ec1 c\u1eadp th\u00eam v\u1ec1 c\u00e1ch s\u1eed d\u1ee5ng JSON schema trong th\u1eed nghi\u1ec7m t\u1ef1 \u0111\u1ed9ng v\u00e0 x\u00e1c th\u1ef1c API.\u00a0<\/span><\/p>\n<h3><b>C\u00e1c ph\u01b0\u01a1ng th\u1ee9c d\u00f9ng \u0111\u1ec3 m\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3 JSON trong PHP l\u00e0 g\u00ec?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng th\u1ee9c d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 m\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3 JSON trong PHP:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>json_encode(): <\/b><span style=\"font-weight: 400;\">Ph\u01b0\u01a1ng th\u1ee9c n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00e3 h\u00f3a JSON trong PHP. N\u00f3 s\u1ebd l\u1ea5y d\u1eef li\u1ec7u \u1edf \u0111\u1ecbnh d\u1ea1ng m\u1ea3ng PHP v\u00e0 chuy\u1ec3n \u0111\u1ed5i th\u00e0nh d\u1eef li\u1ec7u JSON.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>json_decode():<\/b><span style=\"font-weight: 400;\"> \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 gi\u1ea3i m\u00e3 JSON trong PHP, l\u1ea5y m\u1ed9t chu\u1ed7i JSON l\u00e0m \u0111\u1ea7u v\u00e0o v\u00e0 tr\u1ea3 v\u1ec1 corres[ponding PHP array.<\/span><\/li>\n<\/ul>\n<pre><span style=\"font-weight: 400;\">$data = array(\"name\" =&gt; \"ITviec\", \"age\" =&gt; 30);<\/span>\r\n<span style=\"font-weight: 400;\">$json = json_encode($data); \/\/ Chuy\u1ec3n m\u1ea3ng PHP th\u00e0nh chu\u1ed7i JSON<\/span>\r\n<span style=\"font-weight: 400;\">$decoded = json_decode($json); \/\/ Chuy\u1ec3n chu\u1ed7i JSON th\u00e0nh \u0111\u1ed1i t\u01b0\u1ee3ng PHP<\/span><\/pre>\n<h3><b>MIME type c\u1ee7a JSON l\u00e0 g\u00ec?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Ki\u1ec3u MIME trong JSON l\u00e0 application\/json. B\u1ea1n c\u00f3 th\u1ec3 truy\u1ec1n ki\u1ec3u n\u00e0y d\u01b0\u1edbi d\u1ea1ng gi\u00e1 tr\u1ecb cho thu\u1ed9c t\u00ednh type b\u00ean trong th\u1ebb script \u0111\u1ec3 \u0111\u01b0a JSON v\u00e0o t\u00e0i li\u1ec7u HTML.\u00a0<\/span><\/p>\n<h3><b>So s\u00e1nh JSON v\u00e0 XML.<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">JSON v\u00e0 XML l\u00e0 c\u00e1c \u0111\u1ecbnh d\u1ea1ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u qua m\u1ea1ng. Nh\u01b0ng c\u1ea3 hai c\u00f3 m\u1ed9t s\u1ed1 kh\u00e1c bi\u1ec7t nh\u01b0 sau:<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>JSON<\/b><\/td>\n<td><b>XML<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">JavaScript Object Notation<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Extensible Markup Language<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">S\u1eed d\u1ee5ng c\u1eb7p kh\u00f3a-gi\u00e1 tr\u1ecb (key-value)<\/span><\/td>\n<td><span style=\"font-weight: 400;\">S\u1eed d\u1ee5ng c\u00e1c th\u1ebb m\u1edf v\u00e0 \u0111\u00f3ng<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Cho ph\u00e9p t\u1ea1o m\u1ea3ng<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Kh\u00f4ng c\u00f3 m\u1ea3ng<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u0110\u01a1n gi\u1ea3n, d\u1ec5 \u0111\u1ecdc v\u00e0 d\u1ec5 vi\u1ebft<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Ph\u1ee9c t\u1ea1p h\u01a1n so v\u1edbi JSON<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Kh\u00f4ng c\u00f3 c\u01a1 ch\u1ebf b\u1ea3o m\u1eadt m\u1ea1nh m\u1ebd v\u00e0 v\u1eefng ch\u1eafc<\/span><\/td>\n<td><span style=\"font-weight: 400;\">T\u01b0\u1ee3ng t\u1ef1 nh\u01b0 json JSON<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u0110\u01b0\u1ee3c h\u1ed7 tr\u1ee3 t\u1ed1t h\u01a1n trong c\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh hi\u1ec7n \u0111\u1ea1i, \u0111\u1eb7c bi\u1ec7t l\u00e0 JavaScript<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng ph\u1ee9c t\u1ea1p.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><b>Serialization v\u00e0 Deserialization trong JSON l\u00e0 g\u00ec?<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Serialization:<\/b><span style=\"font-weight: 400;\"> Qu\u00e1 tr\u00ecnh chuy\u1ec3n m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng (ho\u1eb7c c\u1ea5u tr\u00fac d\u1eef li\u1ec7u) th\u00e0nh m\u1ed9t chu\u1ed7i JSON \u0111\u1ec3 l\u01b0u tr\u1eef ho\u1eb7c truy\u1ec1n t\u1ea3i.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Deserialization: <\/b><span style=\"font-weight: 400;\">Qu\u00e1 tr\u00ecnh ng\u01b0\u1ee3c l\u1ea1i, chuy\u1ec3n chu\u1ed7i JSON tr\u1edf l\u1ea1i th\u00e0nh \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1eb7c c\u1ea5u tr\u00fac d\u1eef li\u1ec7u trong ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh.<\/span><\/li>\n<\/ul>\n<pre><span style=\"font-weight: 400;\">let obj = { name: \"ITviec\", age: 30 };<\/span>\r\n<span style=\"font-weight: 400;\">let jsonString = JSON.stringify(obj); \/\/ Serialization<\/span>\r\n<span style=\"font-weight: 400;\">let parsedObj = JSON.parse(jsonString); \/\/ Deserialization<\/span><\/pre>\n<h3><b>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 x\u1eed l\u00fd l\u1ed7i ph\u00e2n t\u00edch c\u00fa ph\u00e1p JSON trong JavaScript?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Khi ph\u00e2n t\u00edch c\u00fa ph\u00e1p JSON, n\u1ebfu chu\u1ed7i JSON kh\u00f4ng h\u1ee3p l\u1ec7, ph\u01b0\u01a1ng th\u1ee9c JSON.parse() s\u1ebd hi\u1ec3n th\u1ecb ra l\u1ed7i. \u0110\u1ec3 x\u1eed l\u00fd l\u1ed7i n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng try&#8230;catch.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">try {<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0let jsonString = '{\"name\": \"ITviec\", \"age\": 30';<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0let obj = JSON.parse(jsonString); \/\/ S\u1ebd g\u00e2y l\u1ed7i<\/span>\r\n<span style=\"font-weight: 400;\">} catch (e) {<\/span>\r\n<span style=\"font-weight: 400;\"> \u00a0console.log(\"L\u1ed7i ph\u00e2n t\u00edch c\u00fa ph\u00e1p JSON: \", e.message);<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<h3><b>C\u00f3 th\u1ec3 t\u1ea1o c\u00e1c kh\u00f3a tr\u00f9ng l\u1eb7p trong m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng JSON kh\u00f4ng?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">C\u00e2u tr\u1ea3 l\u1eddi l\u00e0 Kh\u00f4ng, JSON kh\u00f4ng cho ph\u00e9p t\u1ea1o kh\u00f3a tr\u00f9ng l\u1eb7p trong m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng. N\u1ebfu c\u00f3 kh\u00f3a tr\u00f9ng l\u1eb7p \u0111\u01b0\u1ee3c t\u1ea1o trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, th\u00ec l\u1ea7n xu\u1ea5t hi\u1ec7n cu\u1ed1i c\u00f9ng c\u1ee7a kh\u00f3a \u0111\u00f3 s\u1ebd thay th\u1ebf l\u1ea7n xu\u1ea5t hi\u1ec7n tr\u01b0\u1edbc \u0111\u00f3.<\/span><\/p>\n<h3><b>Gi\u1ea3i th\u00edch JSON Web Token (JWT) v\u00e0 c\u00e1ch tri\u1ec3n khai?<\/b><\/h3>\n<p><a href=\"https:\/\/itviec.com\/blog\/json-web-token-la-gi\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">JSON web token<\/span><\/a><span style=\"font-weight: 400;\"> ho\u1eb7c JWT l\u00e0 ti\u00eau chu\u1ea9n m\u00e3 ngu\u1ed3n m\u1edf (open industry standard) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 chia s\u1ebb th\u00f4ng tin an to\u00e0n, kh\u00e9p k\u00edn gi\u1eefa hai th\u1ef1c th\u1ec3, th\u01b0\u1eddng l\u00e0 m\u00e1y kh\u00e1ch (ch\u1eb3ng h\u1ea1n nh\u01b0 frontend c\u1ee7a \u1ee9ng d\u1ee5ng) v\u00e0 m\u00e1y ch\u1ee7 (backend c\u1ee7a \u1ee9ng d\u1ee5ng). M\u1ee5c \u0111\u00edch ch\u00ednh c\u1ee7a JWT l\u00e0 x\u00e1c th\u1ef1c v\u00e0 \u1ee7y quy\u1ec1n. JWT cho ph\u00e9p m\u00e1y ch\u1ee7 x\u00e1c minh danh t\u00ednh c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 c\u1ea5p quy\u1ec1n truy c\u1eadp v\u00e0o t\u00e0i nguy\u00ean d\u1ef1a tr\u00ean th\u00f4ng tin trong token.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">JWT bao g\u1ed3m ba ph\u1ea7n: Header, Payload, v\u00e0 Signature.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">C\u00e1ch \u0111\u1ec3 tri\u1ec3n khai JWT nh\u01b0 sau:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">T\u1ea1o JSON Payload.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">T\u1ea1o kh\u00f3a k\u00fd JWT s\u1ebd c\u1ea7n m\u1ed9t kh\u00f3a k\u00fd v\u00e0 m\u1ed9t thu\u1eadt to\u00e1n \u0111\u1ec3 s\u1eed d\u1ee5ng, c\u00f3 th\u1ec3 t\u1ea1o kh\u00f3a k\u00fd b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng b\u1ea5t k\u1ef3 ngu\u1ed3n ng\u1eabu nhi\u00ean an to\u00e0n n\u00e0o.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">T\u1ea1o header s\u1ebd ch\u1ee9a th\u00f4ng tin v\u1ec1 thu\u1eadt to\u00e1n n\u00e0o \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">T\u1ea1o ch\u1eef k\u00fd (signature)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">T\u1ea1o JWT<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">X\u00e1c minh JWT \u0111\u1ec3 cho ph\u00e9p truy c\u1eadp v\u00e0o c\u00e1c t\u00e0i nguy\u00ean b\u1ea3o m\u1eadt.<\/span><\/li>\n<\/ul>\n<h3><b>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u JSON m\u1ed9t c\u00e1ch an to\u00e0n qua Internet?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">D\u1eef li\u1ec7u JSON c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy\u1ec1n an to\u00e0n qua internet b\u1eb1ng giao th\u1ee9c HTTPS (Giao th\u1ee9c truy\u1ec1n si\u00eau v\u0103n b\u1ea3n an to\u00e0n &#8211; HyperText Transfer Protocol Secure). HTTPS s\u1ebd m\u00e3 h\u00f3a d\u1eef li\u1ec7u gi\u1eefa client v\u00e0 server, \u0111\u1ea3m b\u1ea3o r\u1eb1ng d\u1eef li\u1ec7u JSON kh\u00f4ng b\u1ecb \u0111\u00e1nh c\u1eafp ho\u1eb7c s\u1eeda \u0111\u1ed5i trong qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i.\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>X\u00e1c th\u1ef1c v\u00e0 \u1ee7y quy\u1ec1n:<\/b><span style=\"font-weight: 400;\"> S\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p x\u00e1c th\u1ef1c m\u1ea1nh m\u1ebd (v\u00ed d\u1ee5: JWT, OAuth) \u0111\u1ec3 x\u00e1c minh danh t\u00ednh c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 c\u1ea5p quy\u1ec1n truy c\u1eadp v\u00e0o d\u1eef li\u1ec7u d\u1ef1a tr\u00ean vai tr\u00f2 v\u00e0 quy\u1ec1n h\u1ea1n c\u1ee7a h\u1ecd.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>B\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i t\u1ea5n c\u00f4ng CSRF:<\/b><span style=\"font-weight: 400;\"> T\u1ea5n c\u00f4ng CSRF (Cross-Site Request Forgery) x\u1ea3y ra khi k\u1ebb t\u1ea5n c\u00f4ng l\u1ee3i d\u1ee5ng vi\u1ec7c ng\u01b0\u1eddi d\u00f9ng \u0111\u00e3 \u0111\u0103ng nh\u1eadp v\u00e0o m\u1ed9t trang web \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c h\u00e0nh \u0111\u1ed9ng kh\u00f4ng mong mu\u1ed1n tr\u00ean m\u1ed9t trang web kh\u00e1c. S\u1eed d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 nh\u01b0 CSRF token \u0111\u1ec3 ng\u0103n ch\u1eb7n lo\u1ea1i t\u1ea5n c\u00f4ng n\u00e0y.<\/span><\/li>\n<\/ul>\n<h3><b>JSON-LD l\u00e0 g\u00ec v\u00e0 n\u00f3 kh\u00e1c g\u00ec v\u1edbi JSON?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">JSON-LD (JSON for Linking Data) l\u00e0 \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u li\u00ean k\u1ebft nh\u1eb9 (lightweight Linked Data) \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u00edch h\u1ee3p v\u1edbi c\u00e1c API d\u1ef1a tr\u00ean JSON hi\u1ec7n c\u00f3 tr\u00ean internet.\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">JSON-LD kh\u00e1c v\u1edbi JSON th\u00f4ng th\u01b0\u1eddng v\u00ec c\u00f3 li\u00ean quan \u0111\u1ebfn ng\u1eef c\u1ea3nh v\u00e0 ng\u1eef ngh\u0129a b\u1ed5 sung \u0111\u1ec3 c\u00f3 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c d\u1eef li\u1ec7u t\u1ed1t h\u01a1n.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>JSON<\/b><span style=\"font-weight: 400;\"> l\u00e0 \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u chung, trong khi <\/span><b>JSON-LD<\/b><span style=\"font-weight: 400;\"> \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho vi\u1ec7c truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u c\u00f3 li\u00ean k\u1ebft v\u00e0 s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng Web Semantics.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Ngo\u00e0i ra, JSON-LD c\u00f2n \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong m\u1ed9t s\u1ed1 l\u0129nh v\u1ef1c nh\u01b0:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">SEO v\u00e0 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng hi\u1ec3u n\u1ed9i dung web c\u1ee7a c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Th\u00fac \u0111\u1ea9y t\u00edch h\u1ee3p d\u1eef li\u1ec7u tr\u00ean nhi\u1ec1u h\u1ec7 th\u1ed1ng kh\u00e1c nhau.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">N\u00e2ng cao \u00fd ngh\u0129a ng\u1eef ngh\u0129a c\u1ee7a d\u1eef li\u1ec7u trong API.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">H\u1ed7 tr\u1ee3 ph\u00e1t tri\u1ec3n Web Semantic.<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Cau_hoi_phong_van_JSON_xu_ly_tinh_huong\"><\/span><b>C\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON x\u1eed l\u00fd t\u00ecnh hu\u1ed1ng<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><b>B\u1ea1n s\u1ebd x\u1eed l\u00fd c\u00e1c file JSON c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn nh\u01b0 th\u1ebf n\u00e0o?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">\u0110\u1ec3 x\u1eed l\u00fd c\u00e1c file JSON c\u00f3 k\u00edch th\u01b0\u1edbc d\u1eef li\u1ec7u l\u1edbn s\u1ebd c\u1ea7n \u0111\u00f2i h\u1ecfi m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn r\u00f5 r\u00e0ng. B\u1ea1n c\u00f3 th\u1ec3 n\u00f3i v\u1ec1 c\u00e1c chi\u1ebfn l\u01b0\u1ee3c kh\u1ea3 thi nh\u01b0:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Truy\u1ec1n ph\u00e1t:<\/b><span style=\"font-weight: 400;\"> Ph\u00e2n t\u00edch c\u00fa ph\u00e1p file JSON th\u00e0nh t\u1eebng ph\u1ea7n thay v\u00ec t\u1ea3i to\u00e0n b\u1ed9 v\u00e0o b\u1ed9 nh\u1edb.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>L\u1eadp ch\u1ec9 m\u1ee5c:<\/b><span style=\"font-weight: 400;\"> T\u1ea1o ch\u1ec9 m\u1ee5c \u0111\u1ec3 tra c\u1ee9u nhanh h\u01a1n n\u1ebfu file s\u1ebd \u0111\u01b0\u1ee3c truy v\u1ea5n th\u01b0\u1eddng xuy\u00ean.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>N\u00e9n:<\/b><span style=\"font-weight: 400;\"> S\u1eed d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt n\u00e9n \u0111\u1ec3 gi\u1ea3m k\u00edch th\u01b0\u1edbc file.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Ph\u00e2n trang:<\/b><span style=\"font-weight: 400;\"> N\u1ebfu ph\u1ee5c v\u1ee5 qua API, h\u00e3y tri\u1ec3n khai ph\u00e2n trang \u0111\u1ec3 t\u1ea3i d\u1eef li\u1ec7u th\u00e0nh c\u00e1c ph\u1ea7n nh\u1ecf h\u01a1n.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">B\u00ean c\u1ea1nh \u0111\u00f3, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c c\u00f4ng c\u1ee5 ho\u1eb7c th\u01b0 vi\u1ec7n c\u1ee5 th\u1ec3 \u0111\u00e3 s\u1eed d\u1ee5ng \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c file JSON k\u00edch th\u01b0\u1edbc l\u1edbn. \u0110\u1ed3ng th\u1eddi n\u00f3i th\u00eam v\u1ec1 s\u1ef1 \u0111\u00e1nh \u0111\u1ed5i gi\u1eefa c\u00e1c c\u00e1ch ti\u1ebfp c\u1eadn kh\u00e1c nhau d\u1ef1a tr\u00ean c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3.<\/span><\/p>\n<h3><b>B\u1ea1n s\u1ebd tri\u1ec3n khai n\u00e9n d\u1eef li\u1ec7u cho JSON trong \u1ee9ng d\u1ee5ng web nh\u01b0 th\u1ebf n\u00e0o?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Vi\u1ec7c tri\u1ec3n khai n\u00e9n d\u1eef li\u1ec7u cho JSON trong \u1ee9ng d\u1ee5ng web c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 hi\u1ec7u su\u1ea5t.\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">N\u00e9n GZIP \u1edf c\u1ea5p \u0111\u1ed9 m\u00e1y ch\u1ee7.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Thu nh\u1ecf JSON b\u1eb1ng c\u00e1ch x\u00f3a kho\u1ea3ng tr\u1eafng kh\u00f4ng c\u1ea7n thi\u1ebft.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">S\u1eed d\u1ee5ng t\u00ean kh\u00f3a \u0111\u01b0\u1ee3c vi\u1ebft t\u1eaft (nh\u01b0ng c\u00e2n b\u1eb1ng \u0111i\u1ec1u n\u00e0y v\u1edbi kh\u1ea3 n\u0103ng \u0111\u1ecdc).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00e2n nh\u1eafc c\u00e1c \u0111\u1ecbnh d\u1ea1ng thay th\u1ebf nh\u01b0 BSON cho d\u1eef li\u1ec7u nh\u1ecb ph\u00e2n.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tri\u1ec3n khai gi\u1ea3i n\u00e9n ph\u00eda m\u00e1y kh\u00e1ch n\u1ebfu c\u1ea7n.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 nh\u1eafc th\u00eam c\u00e1c y\u1ebfu t\u1ed1 v\u1ec1 ph\u00eda m\u00e1y ch\u1ee7 v\u00e0 m\u00e1y kh\u00e1ch, th\u1ea3o lu\u1eadn v\u1ec1 s\u1ef1 \u0111\u00e1nh \u0111\u1ed5i gi\u1eefa n\u00e9n v\u00e0 s\u1eed d\u1ee5ng CPU, hay \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00f4ng c\u1ee5 ho\u1eb7c th\u01b0 vi\u1ec7n \u0111\u00e3 d\u00f9ng \u0111\u1ec3 n\u00e9n JSON. \u0110\u1ed3ng th\u1eddi, b\u1ea1n c\u0169ng n\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn t\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c \u0111o l\u01b0\u1eddng t\u00e1c \u0111\u1ed9ng c\u1ee7a n\u00e9n \u0111\u1ed1i v\u1edbi hi\u1ec7u su\u1ea5t \u1ee9ng d\u1ee5ng t\u1ed5ng th\u1ec3.<\/span><\/p>\n<h3><b>B\u1ea1n s\u1ebd x\u1eed l\u00fd phi\u00ean b\u1ea3n trong API d\u1ef1a tr\u00ean JSON nh\u01b0 th\u1ebf n\u00e0o?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Phi\u00ean b\u1ea3n trong API d\u1ef1a tr\u00ean JSON r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 duy tr\u00ec kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch ng\u01b0\u1ee3c trong khi v\u1eabn cho ph\u00e9p thay \u0111\u1ed5i trong t\u01b0\u01a1ng lai. C\u00f3 nhi\u1ec1u c\u00e1ch ti\u1ebfp c\u1eadn kh\u00e1c nhau nh\u01b0:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Phi\u00ean b\u1ea3n URL (v\u00ed d\u1ee5: \/api\/v1\/users)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Phi\u00ean b\u1ea3n ti\u00eau \u0111\u1ec1 y\u00eau c\u1ea7u t\u00f9y ch\u1ec9nh.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Phi\u00ean b\u1ea3n ti\u00eau \u0111\u1ec1 ch\u1ea5p nh\u1eadn.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Phi\u00ean b\u1ea3n tham s\u1ed1 truy v\u1ea5n.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Th\u01b0\u01a1ng l\u01b0\u1ee3ng n\u1ed9i dung.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">B\u1ea1n c\u00f3 th\u1ec3 c\u00e2n nh\u1eafc n\u00f3i th\u00eam v\u1ec1 \u01b0u v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a c\u00e1c chi\u1ebfn l\u01b0\u1ee3c qu\u1ea3n l\u00fd kh\u00e1c nhau. B\u00ean c\u1ea1nh \u0111\u00f3, b\u1ea1n c\u00f3 th\u1ec3 n\u00f3i th\u00eam v\u1ec1 c\u00e1ch x\u1eed l\u00fd vi\u1ec7c ng\u1eebng s\u1eed d\u1ee5ng c\u00e1c phi\u00ean b\u1ea3n c\u0169, c\u00e1ch truy\u1ec1n \u0111\u1ea1t c\u00e1c thay \u0111\u1ed5i cho ng\u01b0\u1eddi d\u00f9ng API v\u00e0 c\u00e1ch qu\u1ea3n l\u00fd phi\u00ean b\u1ea3n li\u00ean quan \u0111\u1ebfn qu\u1ea3n l\u00fd v\u00f2ng \u0111\u1eddi API t\u1ed5ng th\u1ec3. \u0110\u1ec1 c\u1eadp \u0111\u1ebfn t\u1ea7m quan tr\u1ecdng c\u1ee7a t\u00e0i li\u1ec7u v\u00e0 giao ti\u1ebfp r\u00f5 r\u00e0ng trong vi\u1ec7c qu\u1ea3n l\u00fd c\u00e1c phi\u00ean b\u1ea3n API.<\/span><\/p>\n<h3><b>B\u1ea1n s\u1ebd s\u1eed d\u1ee5ng chi\u1ebfn l\u01b0\u1ee3c n\u00e0o \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t ph\u00e2n t\u00edch c\u00fa ph\u00e1p JSON?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">T\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t ph\u00e2n t\u00edch c\u00fa ph\u00e1p JSON l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng x\u1eed l\u00fd l\u01b0\u1ee3ng d\u1eef li\u1ec7u l\u1edbn. M\u1ed9t s\u1ed1 chi\u1ebfn l\u01b0\u1ee3c ph\u1ed5 bi\u1ebfn b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o nh\u01b0:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">S\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch c\u00fa ph\u00e1p g\u1ed1c (nh\u01b0 JSON.parse()) thay v\u00ec eval().<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tri\u1ec3n khai ph\u00e2n t\u00edch c\u00fa ph\u00e1p l\u01b0\u1eddi bi\u1ebfng cho c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng l\u1edbn.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Xem x\u00e9t c\u00e1c \u0111\u1ecbnh d\u1ea1ng nh\u1ecb ph\u00e2n nh\u01b0 BSON cho m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng nh\u1ea5t \u0111\u1ecbnh.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">S\u1eed d\u1ee5ng c\u00e1c m\u1ea3ng \u0111\u00e3 g\u00f5 cho d\u1eef li\u1ec7u s\u1ed1 khi th\u00edch h\u1ee3p.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tri\u1ec3n khai ph\u00e2n t\u00edch c\u00fa ph\u00e1p lu\u1ed3ng cho c\u00e1c t\u1ec7p JSON r\u1ea5t l\u1edbn.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 t\u00ecm ki\u1ebfm c\u00e1c c\u00e2u tr\u1ea3 l\u1eddi ch\u1ee9ng minh s\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 c\u1ea3 thu\u1eadt to\u00e1n ph\u00e2n t\u00edch c\u00fa ph\u00e1p v\u00e0 t\u1ed1i \u01b0u h\u00f3a c\u00f4ng c\u1ee5 JavaScript.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ngo\u00e0i ra, b\u1ea1n c\u00f3 th\u1ec3 th\u1ea3o lu\u1eadn th\u00eam v\u1ec1 c\u00e1c k\u1ef9 thu\u1eadt \u0111\u00e1nh gi\u00e1 chu\u1ea9n \u0111\u1ec3 \u0111o hi\u1ec7u su\u1ea5t ph\u00e2n t\u00edch c\u00fa ph\u00e1p ho\u1eb7c \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c th\u01b0 vi\u1ec7n c\u1ee5 th\u1ec3 \u0111\u1ec3 ph\u00e2n t\u00edch c\u00fa ph\u00e1p JSON hi\u1ec7u su\u1ea5t cao. \u0110\u1ed3ng th\u1eddi, trao \u0111\u1ed5i th\u00eam v\u1ec1 th\u1eddi \u0111i\u1ec3m t\u1ed1i \u01b0u h\u00f3a ph\u00e2n t\u00edch c\u00fa ph\u00e1p tr\u1edf n\u00ean c\u1ea7n thi\u1ebft trong c\u00e1c t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf.\u00a0<\/span><\/p>\n<h3><b>B\u1ea1n s\u1ebd tri\u1ec3n khai x\u1eed l\u00fd l\u1ed7i nh\u01b0 th\u1ebf n\u00e0o khi l\u00e0m vi\u1ec7c v\u1edbi d\u1eef li\u1ec7u JSON?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">X\u1eed l\u00fd l\u1ed7i m\u1ea1nh m\u1ebd l\u00e0 r\u1ea5t quan tr\u1ecdng khi l\u00e0m vi\u1ec7c v\u1edbi d\u1eef li\u1ec7u JSON \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh \u1ed5n \u0111\u1ecbnh c\u1ee7a \u1ee9ng d\u1ee5ng v\u00e0 cung c\u1ea5p tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng t\u1ed1t.\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">S\u1eed d\u1ee5ng c\u00e1c kh\u1ed1i try-catch xung quanh c\u00e1c l\u1ec7nh g\u1ecdi JSON.parse().<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tri\u1ec3n khai x\u00e1c th\u1ef1c l\u01b0\u1ee3c \u0111\u1ed3 \u0111\u1ec3 b\u1eaft l\u1ed7i c\u1ea5u tr\u00fac.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cung c\u1ea5p th\u00f4ng b\u00e1o l\u1ed7i c\u00f3 \u00fd ngh\u0129a cho c\u00e1c lo\u1ea1i l\u1ed7i li\u00ean quan \u0111\u1ebfn JSON kh\u00e1c nhau.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ghi nh\u1eadt k\u00fd l\u1ed7i \u0111\u1ec3 g\u1ee1 l\u1ed7i v\u00e0 gi\u00e1m s\u00e1t.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Quay l\u1ea1i c\u00e1c gi\u00e1 tr\u1ecb m\u1eb7c \u0111\u1ecbnh khi c\u00f3 th\u1ec3.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">B\u1ea1n n\u00ean t\u00ecm ki\u1ebfm c\u00e2u tr\u1ea3 l\u1eddi ch\u1ee9ng minh c\u00e1ch ti\u1ebfp c\u1eadn to\u00e0n di\u1ec7n \u0111\u1ec3 x\u1eed l\u00fd l\u1ed7i, bao g\u1ed3m c\u1ea3 l\u1ed7i c\u00fa ph\u00e1p v\u00e0 l\u1ed7i ng\u1eef ngh\u0129a trong d\u1eef li\u1ec7u JSON.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">B\u00ean c\u1ea1nh \u0111\u00f3, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 n\u00f3i th\u00eam v\u1ec1 c\u00e1ch tri\u1ec3n khai x\u1eed l\u00fd l\u1ed7i trong m\u00f4i tr\u01b0\u1eddng s\u1ea3n xu\u1ea5t, bao g\u1ed3m c\u00e1c chi\u1ebfn l\u01b0\u1ee3c b\u00e1o c\u00e1o v\u00e0 gi\u00e1m s\u00e1t l\u1ed7i. \u0110\u1ed3ng th\u1eddi, \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1ch x\u1eed l\u00fd l\u1ed7i li\u00ean quan \u0111\u1ebfn c\u00e1c quy tr\u00ecnh \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng \u1ee9ng d\u1ee5ng t\u1ed5ng th\u1ec3.<\/span><\/p>\n<h3><b>B\u1ea1n c\u00f3 th\u1ec3 gi\u1ea3i th\u00edch n\u1ebfu g\u1eb7p m\u1ed9t t\u00ecnh hu\u1ed1ng m\u00e0 b\u1ea1n ph\u1ea3i g\u1ee1 l\u1ed7i m\u1ed9t v\u1ea5n \u0111\u1ec1 d\u1eef li\u1ec7u JSON ph\u1ee9c t\u1ea1p kh\u00f4ng?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">B\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u00e2u tr\u1ea3 l\u1eddi nh\u01b0 sau:<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">\u201cTrong m\u1ed9t d\u1ef1 \u00e1n m\u00e0 t\u00edch h\u1ee3p nhi\u1ec1u API, t\u00f4i g\u1eb7p ph\u1ea3i t\u00ecnh hu\u1ed1ng c\u1ea5u tr\u00fac d\u1eef li\u1ec7u JSON kh\u00f4ng nh\u1ea5t qu\u00e1n do kh\u00f4ng kh\u1edbp phi\u00ean b\u1ea3n. \u0110i\u1ec1u n\u00e0y g\u00e2y ra s\u1ef1 c\u1ed1 trong logic ph\u00e2n t\u00edch d\u1eef li\u1ec7u.<\/span><\/i><\/p>\n<p><i><span style=\"font-weight: 400;\">T\u00f4i \u0111\u00e3 s\u1eed d\u1ee5ng nhi\u1ec1u c\u00f4ng c\u1ee5 v\u00e0 k\u1ef9 thu\u1eadt g\u1ee1 l\u1ed7i kh\u00e1c nhau nh\u01b0 ghi nh\u1eadt k\u00fd \u0111\u1ea7u ra trung gian v\u00e0 x\u00e1c th\u1ef1c JSON so v\u1edbi c\u00e1c l\u01b0\u1ee3c \u0111\u1ed3 d\u1ef1 ki\u1ebfn \u200b\u200b\u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c s\u1ef1 kh\u00e1c bi\u1ec7t. Sau khi x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c s\u1ef1 c\u1ed1, t\u00f4i \u0111\u00e3 c\u1eadp nh\u1eadt t\u00edch h\u1ee3p API \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c phi\u00ean b\u1ea3n kh\u00e1c nhau m\u1ed9t c\u00e1ch kh\u00e9o l\u00e9o.\u201d<\/span><\/i><\/p>\n<p><span style=\"font-weight: 400;\">B\u1ea1n h\u00e3y tr\u00ecnh b\u00e0y chi ti\u1ebft quy tr\u00ecnh kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 v\u00e0 c\u00e1c c\u00f4ng c\u1ee5 c\u1ee5 th\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c. \u0110i\u1ec1u n\u00e0y cho th\u1ea5y kh\u1ea3 n\u0103ng gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 th\u1ef1c t\u1ebf hi\u1ec7u qu\u1ea3 c\u1ee7a b\u1ea1n t\u1ed1t h\u01a1n.<\/span><b><\/b><\/p>\n<h3><b>B\u1ea1n s\u1ebd x\u1eed l\u00fd th\u1ebf n\u00e0o trong tr\u01b0\u1eddng h\u1ee3p d\u1eef li\u1ec7u JSON t\u1eeb API b\u00ean ngo\u00e0i b\u1ecb thi\u1ebfu c\u00e1c tr\u01b0\u1eddng mong \u0111\u1ee3i?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">B\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u00e2u tr\u1ea3 l\u1eddi nh\u01b0 sau:<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">\u201cKhi x\u1eed l\u00fd API b\u00ean ngo\u00e0i, th\u01b0\u1eddng g\u1eb7p ph\u1ea3i d\u1eef li\u1ec7u kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7 ho\u1eb7c kh\u00f4ng mong mu\u1ed1n. \u0110\u1ec3 x\u1eed l\u00fd v\u1ea5n \u0111\u1ec1 n\u00e0y, tr\u01b0\u1edbc ti\u00ean t\u00f4i s\u1ebd x\u00e1c th\u1ef1c d\u1eef li\u1ec7u JSON \u0111\u1ebfn v\u1edbi l\u01b0\u1ee3c \u0111\u1ed3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh tr\u01b0\u1edbc \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c tr\u01b0\u1eddng b\u1ecb thi\u1ebfu.<\/span><\/i><\/p>\n<p><i><span style=\"font-weight: 400;\">Ti\u1ebfp theo, t\u00f4i s\u1ebd tri\u1ec3n khai c\u00e1c gi\u00e1 tr\u1ecb m\u1eb7c \u0111\u1ecbnh ho\u1eb7c c\u01a1 ch\u1ebf d\u1ef1 ph\u00f2ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u1ee9ng d\u1ee5ng v\u1eabn c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng. \u0110\u1ed1i v\u1edbi c\u00e1c tr\u01b0\u1eddng quan tr\u1ecdng, t\u00f4i s\u1ebd ghi l\u1ea1i s\u1ef1 c\u1ed1 v\u00e0 c\u00f3 th\u1ec3 th\u00f4ng b\u00e1o cho nh\u00f3m ch\u1ecbu tr\u00e1ch nhi\u1ec7m n\u1ebfu kh\u1ea3 thi.\u201d<\/span><\/i><\/p>\n<p><span style=\"font-weight: 400;\">B\u1ea1n n\u00ean gi\u1ea3i th\u00edch c\u00e1ch ti\u1ebfp c\u1eadn c\u1ee7a b\u1ea1n \u0111\u1ed1i v\u1edbi vi\u1ec7c x\u00e1c th\u1ef1c d\u1eef li\u1ec7u v\u00e0 x\u1eed l\u00fd l\u1ed7i, ch\u1ee9ng minh kh\u1ea3 n\u0103ng duy tr\u00ec t\u00ednh m\u1ea1nh m\u1ebd trong \u1ee9ng d\u1ee5ng b\u1ea5t ch\u1ea5p s\u1ef1 kh\u00f4ng nh\u1ea5t qu\u00e1n c\u1ee7a d\u1eef li\u1ec7u.<\/span><\/p>\n<h3><b>Gi\u1ea3 s\u1eed m\u1ed9t t\u00ecnh hu\u1ed1ng m\u00e0 b\u1ea1n ph\u1ea3i h\u1ee3p nh\u1ea5t d\u1eef li\u1ec7u JSON t\u1eeb nhi\u1ec1u ngu\u1ed3n. B\u1ea1n s\u1ebd x\u1eed l\u00fd xung \u0111\u1ed9t nh\u01b0 th\u1ebf n\u00e0o?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">B\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u00e2u tr\u1ea3 l\u1eddi nh\u01b0 sau:<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">\u201cTrong m\u1ed9t d\u1ef1 \u00e1n m\u00e0 ph\u1ea3i t\u1ed5ng h\u1ee3p d\u1eef li\u1ec7u t\u1eeb nhi\u1ec1u API, t\u00f4i \u0111\u00e3 g\u1eb7p ph\u1ea3i xung \u0111\u1ed9t do c\u00e1c kh\u00f3a ch\u1ed3ng ch\u00e9o v\u00e0 \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u kh\u00e1c nhau. \u0110\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y, tr\u01b0\u1edbc ti\u00ean t\u00f4i chu\u1ea9n h\u00f3a d\u1eef li\u1ec7u th\u00e0nh m\u1ed9t \u0111\u1ecbnh d\u1ea1ng nh\u1ea5t qu\u00e1n.<\/span><\/i><\/p>\n<p><i><span style=\"font-weight: 400;\">Sau \u0111\u00f3, t\u00f4i s\u1eed d\u1ee5ng m\u1ed9t chi\u1ebfn l\u01b0\u1ee3c \u0111\u1ec3 \u01b0u ti\u00ean d\u1eef li\u1ec7u t\u1eeb c\u00e1c ngu\u1ed3n \u0111\u00e1ng tin c\u1eady h\u01a1n v\u00e0 tri\u1ec3n khai c\u00e1c quy t\u1eafc gi\u1ea3i quy\u1ebft xung \u0111\u1ed9t. V\u00ed d\u1ee5: t\u00f4i \u0111\u00e3 s\u1eed d\u1ee5ng d\u1eef li\u1ec7u g\u1ea7n \u0111\u00e2y nh\u1ea5t ho\u1eb7c d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c h\u1ee3p nh\u1ea5t d\u1ef1a tr\u00ean logic kinh doanh \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh tr\u01b0\u1edbc.\u201d<\/span><\/i><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u1ec3 n\u00e2ng cao c\u01a1 h\u1ed9i, b\u1ea1n c\u00f3 th\u1ec3 th\u1ea3o lu\u1eadn v\u1ec1 c\u00e1ch ti\u1ebfp c\u1eadn \u0111\u1ed1i v\u1edbi chu\u1ea9n h\u00f3a d\u1eef li\u1ec7u, gi\u1ea3i quy\u1ebft xung \u0111\u1ed9t v\u00e0 logic m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 ho\u1eb7c \u0111\u00e3 s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh nh\u1ea5t qu\u00e1n c\u1ee7a d\u1eef li\u1ec7u.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tong_ket_cau_hoi_phong_van_JSON\"><\/span><b>T\u1ed5ng k\u1ebft c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON\u00a0<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>B\u1ed9 c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON tr\u00ean<span style=\"font-weight: 400;\"> kh\u00f4ng ch\u1ec9 ki\u1ec3m tra ki\u1ebfn th\u1ee9c v\u1ec1 c\u00fa ph\u00e1p v\u00e0 c\u00e1ch thao t\u00e1c v\u1edbi JSON m\u00e0 c\u00f2n \u0111\u00e1nh gi\u00e1 \u0111\u01b0\u1ee3c kh\u1ea3 n\u0103ng x\u1eed l\u00fd d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n. Vi\u1ec7c n\u1eafm v\u1eefng c\u00e1c kh\u00e1i ni\u1ec7m v\u00e0 ph\u01b0\u01a1ng th\u1ee9c l\u00e0m vi\u1ec7c v\u1edbi JSON s\u1ebd gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng v\u01b0\u1ee3t qua ph\u1ecfng v\u1ea5n v\u00e0 n\u00e2ng cao c\u01a1 h\u1ed9i ngh\u1ec1 nghi\u1ec7p. Ch\u00fac b\u1ea1n g\u1eb7p nhi\u1ec1u may m\u1eafn v\u00e0 s\u1edbm \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 nh\u01b0 mong \u0111\u1ee3i!\u00a0<\/span><\/p>\n<blockquote><p><i>Xem th\u00eam: <\/i><a href=\"https:\/\/itviec.com\/blog\/json-la-gi\/\" target=\"_blank\" rel=\"noopener\"><b><i>JSON l\u00e0 g\u00ec? C\u00e1c lo\u1ea1i d\u1eef li\u1ec7u JSON l\u00e0 g\u00ec v\u00e0 \u00e1p d\u1ee5ng th\u1ebf n\u00e0o?<\/i><\/b><\/a><\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>C\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON th\u01b0\u1eddng xoay quanh kh\u00e1i ni\u1ec7m, c\u1ea5u tr\u00fac, c\u00e1ch s\u1eed d\u1ee5ng v\u00e0 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c l\u00e0m vi\u1ec7c v\u1edbi JSON. B\u00e0i vi\u1ebft s\u1ebd t\u1ed5ng h\u1ee3p c\u00e1c c\u00e2u h\u1ecfi v\u1ec1 JSON th\u01b0\u1eddng g\u1eb7p \u0111i k\u00e8m c\u00e2u tr\u1ea3 l\u1eddi c\u1ee5 th\u1ec3 s\u1ebd gi\u00fap b\u1ea1n t\u1ef1 tin h\u01a1n khi b\u01b0\u1edbc v\u00e0o bu\u1ed5i ph\u1ecfng v\u1ea5n. \u0110\u1ecdc [&hellip;]<\/p>\n","protected":false},"author":207,"featured_media":84736,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_gspb_post_css":"","footnotes":""},"categories":[109,105],"tags":[],"class_list":["post-84718","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chuyen-mon-it","category-phong-van-it"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Top 30+ c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON th\u01b0\u1eddng g\u1eb7p nh\u1ea5t - ITviec Blog<\/title>\n<meta name=\"description\" content=\"T\u1ed5ng h\u1ee3p c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON th\u01b0\u1eddng g\u1eb7p k\u00e8m c\u00e2u tr\u1ea3 l\u1eddi, bao g\u1ed3m ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao v\u00e0 c\u00e1c c\u00e2u h\u1ecfi t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/itviec.com\/blog\/cau-hoi-phong-van-json\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Top 30+ c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON th\u01b0\u1eddng g\u1eb7p nh\u1ea5t\" \/>\n<meta property=\"og:description\" content=\"C\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n JSON th\u01b0\u1eddng xoay quanh kh\u00e1i ni\u1ec7m, c\u1ea5u tr\u00fac, c\u00e1ch s\u1eed d\u1ee5ng v\u00e0 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c l\u00e0m vi\u1ec7c v\u1edbi JSON. 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