{"id":28636,"date":"2025-05-24T09:32:46","date_gmt":"2025-05-24T02:32:46","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=28636"},"modified":"2025-06-16T10:21:24","modified_gmt":"2025-06-16T03:21:24","slug":"http-response-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/http-response-la-gi\/","title":{"rendered":"HTTP Response l\u00e0 g\u00ec? Vai tr\u00f2 &#038; C\u1ea5u tr\u00fac c\u1ee7a Response n\u00ean bi\u1ebft"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed8I DUNG<\/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 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/interdata.vn\/blog\/http-response-la-gi\/#Response-la-gi\" >Response 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:\/\/interdata.vn\/blog\/http-response-la-gi\/#Vai-tro-cua-HTTP-Response\" >Vai tr\u00f2 c\u1ee7a HTTP Response<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/http-response-la-gi\/#Phan-phoi-noi-dung\" >Ph\u00e2n ph\u1ed1i n\u1ed9i dung<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/http-response-la-gi\/#Bao-cao-trang-thai-va-xu-ly-loi\" >B\u00e1o c\u00e1o tr\u1ea1ng th\u00e1i v\u00e0 x\u1eed l\u00fd l\u1ed7i<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/http-response-la-gi\/#Ho-tro-Cache\" >H\u1ed7 tr\u1ee3 Cache<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/http-response-la-gi\/#Ho-tro-dam-phan-noi-dung\" >H\u1ed7 tr\u1ee3 \u0111\u00e0m ph\u00e1n n\u1ed9i dung<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/interdata.vn\/blog\/http-response-la-gi\/#Cach-hoat-dong-cua-HTTP-RequestResponse\" >C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a HTTP Request\/Response<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/http-response-la-gi\/#Cau-truc-co-ban-cua-HTTP-Response\" >C\u1ea5u tr\u00fac c\u01a1 b\u1ea3n c\u1ee7a HTTP Response<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/http-response-la-gi\/#Dong-Trang-thai-Status-Line\" >D\u00f2ng Tr\u1ea1ng th\u00e1i (Status Line)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/http-response-la-gi\/#Cac-Tieu-de-Headers\" >C\u00e1c Ti\u00eau \u0111\u1ec1 (Headers)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/http-response-la-gi\/#Noi-dung-Body\" >N\u1ed9i dung (Body)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/http-response-la-gi\/#Phan-loai-ma-trang-thai-trong-HTTP-Response-Status-Code\" >Ph\u00e2n lo\u1ea1i m\u00e3 tr\u1ea1ng th\u00e1i trong HTTP Response (Status Code)<\/a><\/li><\/ul><\/nav><\/div>\n<p>HTTP Response l\u00e0 th\u00f4ng \u0111i\u1ec7p ph\u1ea3n h\u1ed3i m\u00e0 m\u00e1y ch\u1ee7 g\u1eedi tr\u1ea3 v\u1ec1 sau khi nh\u1eadn v\u00e0 x\u1eed l\u00fd m\u1ed9t HTTP Request t\u1eeb client. \u0110\u00e2y ch\u00ednh l\u00e0 c\u1ea7u n\u1ed1i hai chi\u1ec1u trong giao ti\u1ebfp web, quy\u1ebft \u0111\u1ecbnh xem d\u1eef li\u1ec7u c\u00f3 \u0111\u01b0\u1ee3c tr\u1ea3 v\u1ec1 hay kh\u00f4ng v\u00e0 d\u01b0\u1edbi d\u1ea1ng n\u00e0o.<\/p>\n<p>Trong b\u00e0i vi\u1ebft n\u00e0y, InterData s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 kh\u00e1i ni\u1ec7m <a href=\"https:\/\/interdata.vn\/blog\/http-response-la-gi\/\"><strong>HTTP Response l\u00e0 g\u00ec<\/strong><\/a>, c\u1ea5u tr\u00fac ph\u1ea3n h\u1ed3i bao g\u1ed3m status line, headers v\u00e0 body, c\u0169ng nh\u01b0 c\u00e1ch ph\u00e2n lo\u1ea1i status code th\u01b0\u1eddng g\u1eb7p nh\u01b0 200, 404, 500. N\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y s\u1ebd gi\u00fap b\u1ea1n x\u1eed l\u00fd l\u1ed7i hi\u1ec7u qu\u1ea3 h\u01a1n, t\u1ed1i \u01b0u API, v\u00e0 x\u00e2y d\u1ef1ng h\u1ec7 th\u1ed1ng web \u0111\u00e1ng tin c\u1eady h\u01a1n. \u0110\u1ecdc ngay!<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Response-la-gi\"><\/span>Response l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Trong l\u1eadp tr\u00ecnh, response (ph\u1ea3n h\u1ed3i) l\u00e0 th\u00f4ng \u0111i\u1ec7p m\u00e0 m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh m\u00e1y t\u00ednh (server) g\u1eedi l\u1ea1i cho ch\u01b0\u01a1ng tr\u00ecnh \u0111\u00e3 g\u1eedi y\u00eau c\u1ea7u (client) sau khi \u0111\u00e3 x\u1eed l\u00fd xong request (y\u00eau c\u1ea7u) c\u1ee7a client \u0111\u00f3. N\u00f3 l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a qu\u00e1 tr\u00ecnh giao ti\u1ebfp hai chi\u1ec1u gi\u1eefa client v\u00e0 server.<\/p>\n<p>HTTP Response \u0111\u00f3ng vai tr\u00f2 c\u1ef1c k\u1ef3 quan tr\u1ecdng, n\u00f3 nh\u01b0 &#8220;c\u00e2u tr\u1ea3 l\u1eddi&#8221; m\u00e0 m\u00e1y ch\u1ee7 \u0111\u01b0a ra cho &#8220;c\u00e2u h\u1ecfi&#8221; t\u1eeb client. D\u1ef1a v\u00e0o response n\u00e0y, client bi\u1ebft y\u00eau c\u1ea7u c\u00f3 th\u00e0nh c\u00f4ng hay kh\u00f4ng v\u00e0 nh\u1eadn v\u1ec1 d\u1eef li\u1ec7u c\u1ea7n thi\u1ebft \u0111\u1ec3 hi\u1ec3n th\u1ecb ho\u1eb7c x\u1eed l\u00fd ti\u1ebfp.<\/p>\n<figure id=\"attachment_28639\" aria-describedby=\"caption-attachment-28639\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/HTTP-Response-la-gi.jpg\" alt=\"HTTP Response l\u00e0 g\u00ec?\" width=\"800\" height=\"500\" class=\"size-full wp-image-28639\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/HTTP-Response-la-gi.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/HTTP-Response-la-gi-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/HTTP-Response-la-gi-768x480.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/HTTP-Response-la-gi-750x469.jpg 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-28639\" class=\"wp-caption-text\">HTTP Response l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<p><strong>V\u00ed d\u1ee5 HTTP Response:<\/strong><\/p>\n<pre><span>HTTP\/1.1 200 OK<\/span><span> <\/span>\r\n<span>Date: Wed, 23 Jun 2024 12:00:00 GMT<\/span><span> <\/span>\r\n<span>Server: Apache<\/span><span> <\/span>\r\n<span>Content-Type: text\/html; charset=UTF-8<\/span><span> <\/span>\r\n<span>Content-Length: 1234<\/span><span> <\/span>\r\n\r\n<span> <\/span><span> <\/span><span> <\/span><span> Example Page<\/span><span> <\/span>\r\n<span> <\/span><span> Hello, World!<\/span><\/pre>\n<p>Trong v\u00ed d\u1ee5 HTTP Response tr\u00ean, ph\u1ea3n h\u1ed3i c\u00f3 m\u00e3 tr\u1ea1ng th\u00e1i l\u00e0 200 OK, cho bi\u1ebft y\u00eau c\u1ea7u \u0111\u00e3 th\u00e0nh c\u00f4ng. Ph\u1ea3n h\u1ed3i m\u00e1y ch\u1ee7 bao g\u1ed3m c\u00e1c ti\u00eau \u0111\u1ec1 ch\u1ec9 r\u00f5 ng\u00e0y, lo\u1ea1i m\u00e1y ch\u1ee7, lo\u1ea1i n\u1ed9i dung v\u00e0 \u0111\u1ed9 d\u00e0i n\u1ed9i dung. Ph\u1ea7n th\u00e2n ch\u1ee9a m\u1ed9t t\u00e0i li\u1ec7u HTML v\u1edbi n\u1ed9i dung \u0111\u01a1n gi\u1ea3n \u201cHello, World!\u201d tin nh\u1eafn.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Vai-tro-cua-HTTP-Response\"><\/span>Vai tr\u00f2 c\u1ee7a HTTP Response<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>HTTP Response \u0111\u00f3ng vai tr\u00f2 trung t\u00e2m trong giao ti\u1ebfp gi\u1eefa m\u00e1y ch\u1ee7 v\u00e0 client tr\u00ean Internet. N\u00f3 l\u00e0 c\u00e1ch duy nh\u1ea5t \u0111\u1ec3 m\u00e1y ch\u1ee7 &#8220;n\u00f3i&#8221; l\u1ea1i v\u1edbi client sau khi nh\u1eadn y\u00eau c\u1ea7u, cung c\u1ea5p k\u1ebft qu\u1ea3 x\u1eed l\u00fd v\u00e0 c\u00e1c th\u00f4ng tin c\u1ea7n thi\u1ebft kh\u00e1c.<\/p>\n<p>Hi\u1ec3u r\u00f5 c\u00e1c vai tr\u00f2 c\u1ee7a HTTP Response kh\u00f4ng ch\u1ec9 gi\u00fap l\u1eadp tr\u00ecnh vi\u00ean x\u00e2y d\u1ef1ng \u1ee9ng d\u1ee5ng hi\u1ec7u qu\u1ea3 m\u00e0 c\u00f2n gi\u00fap ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i h\u00ecnh dung \u0111\u01b0\u1ee3c \u0111i\u1ec1u g\u00ec \u0111ang di\u1ec5n ra &#8220;\u0111\u1eb1ng sau&#8221; khi h\u1ecd truy c\u1eadp web.<\/p>\n<p>Response kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 g\u1eedi d\u1eef li\u1ec7u. N\u00f3 mang nhi\u1ec1u th\u00f4ng \u0111i\u1ec7p v\u00e0 ch\u1ec9 d\u1eabn quan tr\u1ecdng, quy\u1ebft \u0111\u1ecbnh c\u00e1ch client x\u1eed l\u00fd th\u00f4ng tin v\u00e0 t\u01b0\u01a1ng t\u00e1c ti\u1ebfp theo v\u1edbi m\u00e1y ch\u1ee7. Ch\u00fang ta c\u00f3 th\u1ec3 xem x\u00e9t m\u1ed9t s\u1ed1 vai tr\u00f2 ch\u00ednh c\u1ee7a HTTP Response nh\u01b0 sau:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Phan-phoi-noi-dung\"><\/span>Ph\u00e2n ph\u1ed1i n\u1ed9i dung<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Vai tr\u00f2 c\u01a1 b\u1ea3n v\u00e0 d\u1ec5 th\u1ea5y nh\u1ea5t c\u1ee7a HTTP Response l\u00e0 ph\u00e2n ph\u1ed1i n\u1ed9i dung t\u1eeb Server \u0111\u1ebfn Client. Khi b\u1ea1n y\u00eau c\u1ea7u m\u1ed9t trang web, h\u00ecnh \u1ea3nh, video hay b\u1ea5t k\u1ef3 t\u00e0i nguy\u00ean n\u00e0o kh\u00e1c, Server s\u1ebd g\u1eedi ch\u00fang v\u1ec1 trong ph\u1ea7n Body c\u1ee7a Response.<\/p>\n<p>Nh\u1edd Response, Client c\u00f3 th\u1ec3 nh\u1eadn \u0111\u01b0\u1ee3c m\u00e3 HTML \u0111\u1ec3 tr\u00ecnh duy\u1ec7t hi\u1ec3n th\u1ecb th\u00e0nh trang web, d\u1eef li\u1ec7u JSON \u0111\u1ec3 \u1ee9ng d\u1ee5ng x\u1eed l\u00fd, ho\u1eb7c file \u0111\u1ec3 ng\u01b0\u1eddi d\u00f9ng t\u1ea3i v\u1ec1, gi\u00fap ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp th\u00f4ng tin tr\u00ean web.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Bao-cao-trang-thai-va-xu-ly-loi\"><\/span>B\u00e1o c\u00e1o tr\u1ea1ng th\u00e1i v\u00e0 x\u1eed l\u00fd l\u1ed7i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>HTTP Response lu\u00f4n ch\u1ee9a M\u00e3 tr\u1ea1ng th\u00e1i (Status Code) b\u00e1o c\u00e1o k\u1ebft qu\u1ea3 x\u1eed l\u00fd y\u00eau c\u1ea7u. M\u00e3 tr\u1ea1ng th\u00e1i n\u00e0y l\u00e0 c\u00e1ch Server th\u00f4ng b\u00e1o cho Client bi\u1ebft y\u00eau c\u1ea7u c\u00f3 th\u00e0nh c\u00f4ng hay kh\u00f4ng, v\u00e0 n\u1ebfu kh\u00f4ng, l\u00fd do l\u00e0 g\u00ec.<\/p>\n<p>Vai tr\u00f2 n\u00e0y c\u1ef1c k\u1ef3 quan tr\u1ecdng cho vi\u1ec7c x\u1eed l\u00fd l\u1ed7i. Client (ho\u1eb7c l\u1eadp tr\u00ecnh vi\u00ean) c\u00f3 th\u1ec3 d\u1ef1a v\u00e0o Status Code (nh\u01b0 404 Not Found, 500 Internal Server Error) \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u1ea5n \u0111\u1ec1 v\u00e0 \u0111\u01b0a ra ph\u1ea3n h\u1ed3i ph\u00f9 h\u1ee3p cho ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<p>V\u00ed d\u1ee5, khi b\u1ea1n th\u1ea5y trang b\u00e1o l\u1ed7i &#8220;404 Not Found&#8221;, \u0111\u00f3 ch\u00ednh l\u00e0 th\u00f4ng tin t\u1eeb Status Code trong HTTP Response, b\u00e1o cho tr\u00ecnh duy\u1ec7t bi\u1ebft t\u00e0i nguy\u00ean kh\u00f4ng t\u1ed3n t\u1ea1i tr\u00ean Server.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ho-tro-Cache\"><\/span>H\u1ed7 tr\u1ee3 Cache<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>HTTP Response c\u00f3 th\u1ec3 ch\u1ee9a c\u00e1c Ti\u00eau \u0111\u1ec1 (Headers) quan tr\u1ecdng cung c\u1ea5p ch\u1ec9 d\u1eabn v\u1ec1 vi\u1ec7c l\u01b0u tr\u1eef t\u1ea1m th\u1eddi (cache) ph\u1ea3n h\u1ed3i n\u00e0y. C\u00e1c Header nh\u01b0 <code>Cache-Control<\/code> ho\u1eb7c <code>Expires<\/code> \u0111\u00f3ng vai tr\u00f2 n\u00e0y.<\/p>\n<p>Nh\u1edd c\u00e1c ch\u1ec9 d\u1eabn n\u00e0y, Client ho\u1eb7c m\u00e1y ch\u1ee7 trung gian (proxy) c\u00f3 th\u1ec3 l\u01b0u b\u1ea3n sao c\u1ee7a Response l\u1ea1i v\u00e0 s\u1eed d\u1ee5ng cho c\u00e1c y\u00eau c\u1ea7u t\u01b0\u01a1ng t\u1ef1 ti\u1ebfp theo m\u00e0 kh\u00f4ng c\u1ea7n h\u1ecfi l\u1ea1i Server g\u1ed1c, gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 gi\u1ea3m t\u1ea3i Server.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ho-tro-dam-phan-noi-dung\"><\/span>H\u1ed7 tr\u1ee3 \u0111\u00e0m ph\u00e1n n\u1ed9i dung<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Headers trong HTTP Response c\u0169ng h\u1ed7 tr\u1ee3 qu\u00e1 tr\u00ecnh &#8220;\u0111\u00e0m ph\u00e1n n\u1ed9i dung&#8221;. Server c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c Header nh\u01b0 <code>Content-Type<\/code> \u0111\u1ec3 cho Client bi\u1ebft \u0111\u1ecbnh d\u1ea1ng v\u00e0 m\u00e3 h\u00f3a c\u1ee7a n\u1ed9i dung trong Body.<\/p>\n<p>\u0110i\u1ec1u n\u00e0y cho ph\u00e9p Client hi\u1ec3u v\u00e0 x\u1eed l\u00fd n\u1ed9i dung ph\u1ea3n h\u1ed3i m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c, v\u00ed d\u1ee5 tr\u00ecnh duy\u1ec7t bi\u1ebft c\u00e1ch hi\u1ec3n th\u1ecb HTML hay \u1ee9ng d\u1ee5ng bi\u1ebft c\u00e1ch parse (ph\u00e2n t\u00edch) d\u1eef li\u1ec7u JSON nh\u1eadn \u0111\u01b0\u1ee3c.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach-hoat-dong-cua-HTTP-RequestResponse\"><\/span>C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a HTTP Request\/Response<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 hi\u1ec3u HTTP Response, c\u1ea7n n\u1eafm r\u00f5 chu tr\u00ecnh giao ti\u1ebfp c\u01a1 b\u1ea3n c\u1ee7a HTTP:<\/p>\n<ul>\n<li><strong>B\u01b0\u1edbc 1:<\/strong> Client (v\u00ed d\u1ee5: tr\u00ecnh duy\u1ec7t c\u1ee7a b\u1ea1n khi b\u1ea1n g\u00f5 \u0111\u1ecba ch\u1ec9 website) t\u1ea1o v\u00e0 g\u1eedi m\u1ed9t <strong>HTTP Request<\/strong> \u0111\u1ebfn Server. Request n\u00e0y ch\u1ee9a th\u00f4ng tin v\u1ec1 t\u00e0i nguy\u00ean Client mu\u1ed1n truy c\u1eadp (URL), ph\u01b0\u01a1ng th\u1ee9c h\u00e0nh \u0111\u1ed9ng (GET, POST, v.v.), v\u00e0 c\u00e1c th\u00f4ng tin b\u1ed5 sung trong Header.<\/li>\n<li><strong>B\u01b0\u1edbc 2:<\/strong> Server nh\u1eadn Request, x\u1eed l\u00fd y\u00eau c\u1ea7u \u0111\u00f3 (v\u00ed d\u1ee5: t\u00ecm trang web, x\u1eed l\u00fd d\u1eef li\u1ec7u form, truy v\u1ea5n c\u01a1 s\u1edf d\u1eef li\u1ec7u).<\/li>\n<li><strong>B\u01b0\u1edbc 3:<\/strong> Server t\u1ea1o v\u00e0 g\u1eedi m\u1ed9t <strong>HTTP Response<\/strong> tr\u1edf l\u1ea1i cho Client. Response n\u00e0y ch\u1ee9a k\u1ebft qu\u1ea3 x\u1eed l\u00fd y\u00eau c\u1ea7u, bao g\u1ed3m tr\u1ea1ng th\u00e1i c\u1ee7a y\u00eau c\u1ea7u v\u00e0 d\u1eef li\u1ec7u (n\u1ebfu c\u00f3).<\/li>\n<li><strong>B\u01b0\u1edbc 4:<\/strong> Client nh\u1eadn Response v\u00e0 x\u1eed l\u00fd n\u00f3 (v\u00ed d\u1ee5: tr\u00ecnh duy\u1ec7t hi\u1ec3n th\u1ecb trang web, \u1ee9ng d\u1ee5ng di \u0111\u1ed9ng c\u1eadp nh\u1eadt giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng).<\/li>\n<\/ul>\n<figure id=\"attachment_28640\" aria-describedby=\"caption-attachment-28640\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Cach-hoat-dong-cua-HTTP-RequestResponse.jpg\" alt=\"C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a HTTP RequestResponse\" width=\"800\" height=\"500\" class=\"size-full wp-image-28640\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Cach-hoat-dong-cua-HTTP-RequestResponse.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Cach-hoat-dong-cua-HTTP-RequestResponse-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Cach-hoat-dong-cua-HTTP-RequestResponse-768x480.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Cach-hoat-dong-cua-HTTP-RequestResponse-750x469.jpg 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-28640\" class=\"wp-caption-text\">C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a HTTP RequestResponse<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Cau-truc-co-ban-cua-HTTP-Response\"><\/span>C\u1ea5u tr\u00fac c\u01a1 b\u1ea3n c\u1ee7a HTTP Response<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>M\u1ed9t HTTP Response c\u00f3 c\u1ea5u tr\u00fac \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh r\u00f5 r\u00e0ng b\u1edfi giao th\u1ee9c HTTP. N\u00f3 bao g\u1ed3m c\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh mang th\u00f4ng tin quan tr\u1ecdng t\u1eeb m\u00e1y ch\u1ee7 g\u1eedi \u0111\u1ebfn client. N\u1eafm v\u1eefng t\u1eebng c\u1ea5u tr\u00fac c\u1ee7a HTTP Response trong l\u1eadp tr\u00ecnh s\u1ebd gi\u00fap b\u1ea1n g\u1ee1 l\u1ed7i hi\u1ec7u qu\u1ea3 h\u01a1n, hi\u1ec3u r\u00f5 h\u01a1n c\u00e1ch c\u00e1c trang web v\u00e0 \u1ee9ng d\u1ee5ng giao ti\u1ebfp.<\/p>\n<p>Trong phi\u00ean b\u1ea3n HTTP\/1.1 ph\u1ed5 bi\u1ebfn, HTTP Response bao g\u1ed3m ba ph\u1ea7n ch\u00ednh: D\u00f2ng Tr\u1ea1ng th\u00e1i, C\u00e1c Ti\u00eau \u0111\u1ec1, v\u00e0 N\u1ed9i dung (Body). D\u00f9 HTTP\/2 v\u00e0 HTTP\/3 c\u00f3 c\u00e1ch \u0111\u00f3ng g\u00f3i d\u1eef li\u1ec7u kh\u00e1c (nh\u01b0 stream, multiplexing), nh\u01b0ng logic ph\u00e2n chia v\u1eabn gi\u1eef nguy\u00ean.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dong-Trang-thai-Status-Line\"><\/span>D\u00f2ng Tr\u1ea1ng th\u00e1i (Status Line)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 d\u00f2ng \u0111\u1ea7u ti\u00ean v\u00e0 r\u1ea5t quan tr\u1ecdng c\u1ee7a HTTP Response trong HTTP\/1.1. N\u00f3 cung c\u1ea5p c\u00e1i nh\u00ecn t\u1ed5ng quan v\u1ec1 k\u1ebft qu\u1ea3 x\u1eed l\u00fd y\u00eau c\u1ea7u ngay l\u1eadp t\u1ee9c cho client.<\/p>\n<p>D\u00f2ng tr\u1ea1ng th\u00e1i bao g\u1ed3m ba th\u00f4ng tin: phi\u00ean b\u1ea3n giao th\u1ee9c HTTP (v\u00ed d\u1ee5: <code>HTTP\/1.1<\/code>), m\u00e3 tr\u1ea1ng th\u00e1i (Status Code), v\u00e0 m\u1ed9t \u0111o\u1ea1n v\u0103n b\u1ea3n m\u00f4 t\u1ea3 ng\u1eafn g\u1ecdn v\u1ec1 m\u00e3 tr\u1ea1ng th\u00e1i \u0111\u00f3 (Status Text).<\/p>\n<p>V\u00ed d\u1ee5: <code>HTTP\/1.1 200 OK<\/code>. D\u00f2ng n\u00e0y cho bi\u1ebft Server d\u00f9ng HTTP\/1.1, y\u00eau c\u1ea7u th\u00e0nh c\u00f4ng (m\u00e3 200), v\u00e0 m\u00f4 t\u1ea3 l\u00e0 &#8220;OK&#8221;.<\/p>\n<p>M\u00e3 tr\u1ea1ng th\u00e1i l\u00e0 ph\u1ea7n then ch\u1ed1t c\u1ee7a D\u00f2ng tr\u1ea1ng th\u00e1i. N\u00f3 l\u00e0 con s\u1ed1 quy\u1ebft \u0111\u1ecbnh Client c\u1ea7n l\u00e0m g\u00ec ti\u1ebfp theo v\u1edbi Response n\u00e0y.<\/p>\n<p><strong>M\u00e3 Tr\u1ea1ng th\u00e1i (Status Code) &#8211; Th\u00f4ng \u0111i\u1ec7p k\u1ebft qu\u1ea3:<\/strong><\/p>\n<p>M\u00e3 tr\u1ea1ng th\u00e1i l\u00e0 s\u1ed1 nguy\u00ean 3 ch\u1eef s\u1ed1 bi\u1ec3u th\u1ecb k\u1ebft qu\u1ea3 x\u1eed l\u00fd y\u00eau c\u1ea7u c\u1ee7a Server. Ch\u00fang \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i th\u00e0nh 5 nh\u00f3m (1xx, 2xx, 3xx, 4xx, 5xx), m\u1ed7i nh\u00f3m th\u1ec3 hi\u1ec7n m\u1ed9t lo\u1ea1i k\u1ebft qu\u1ea3 kh\u00e1c nhau.<\/p>\n<p>Hi\u1ec3u r\u00f5 c\u00e1c m\u00e3 n\u00e0y l\u00e0 k\u1ef9 n\u0103ng c\u01a1 b\u1ea3n khi l\u00e0m vi\u1ec7c v\u1edbi web v\u00e0 API, gi\u00fap b\u1ea1n nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh v\u1ea5n \u0111\u1ec1 n\u1eb1m \u1edf \u0111\u00e2u.<\/p>\n<ul>\n<li><strong>200 OK<\/strong>: M\u00e3 ph\u1ed5 bi\u1ebfn nh\u1ea5t. Ch\u1ec9 ra r\u1eb1ng y\u00eau c\u1ea7u \u0111\u00e3 th\u00e0nh c\u00f4ng v\u00e0 Server \u0111\u00e3 t\u00ecm th\u1ea5y\/x\u1eed l\u00fd t\u00e0i nguy\u00ean theo y\u00eau c\u1ea7u. Response Body th\u01b0\u1eddng ch\u1ee9a d\u1eef li\u1ec7u b\u1ea1n c\u1ea7n.<\/li>\n<li><strong>301 Moved Permanently<\/strong>: Ngh\u0129a l\u00e0 t\u00e0i nguy\u00ean b\u1ea1n y\u00eau c\u1ea7u \u0111\u00e3 \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ebfn m\u1ed9t \u0111\u1ecba ch\u1ec9 URL m\u1edbi v\u00e0 \u0111\u1ecba ch\u1ec9 n\u00e0y l\u00e0 v\u0129nh vi\u1ec5n. Client n\u00ean c\u1eadp nh\u1eadt URL cho l\u1ea7n y\u00eau c\u1ea7u sau.<\/li>\n<li><strong>404 Not Found<\/strong>: R\u1ea5t quen thu\u1ed9c! M\u00e3 n\u00e0y c\u00f3 ngh\u0129a l\u00e0 Server kh\u00f4ng t\u00ecm th\u1ea5y t\u00e0i nguy\u00ean t\u01b0\u01a1ng \u1ee9ng v\u1edbi URL b\u1ea1n \u0111\u00e3 y\u00eau c\u1ea7u. L\u1ed7i n\u00e0y th\u01b0\u1eddng t\u1eeb ph\u00eda Client (URL sai).<\/li>\n<li><strong>500 Internal Server Error<\/strong>: \u0110\u00e2y l\u00e0 l\u1ed7i t\u1eeb ph\u00eda Server. N\u00f3 l\u00e0 m\u1ed9t th\u00f4ng b\u00e1o chung khi Server g\u1eb7p s\u1ef1 c\u1ed1 n\u1ed9i b\u1ed9 v\u00e0 kh\u00f4ng th\u1ec3 ho\u00e0n th\u00e0nh y\u00eau c\u1ea7u c\u1ee7a b\u1ea1n, d\u00f9 Request c\u00f3 v\u1ebb h\u1ee3p l\u1ec7.<\/li>\n<\/ul>\n<p><em><\/em>C\u00f2n r\u1ea5t nhi\u1ec1u m\u00e3 tr\u1ea1ng th\u00e1i kh\u00e1c (v\u00ed d\u1ee5: 201 Created, 403 Forbidden, 503 Service Unavailable), m\u1ed7i m\u00e3 mang \u00fd ngh\u0129a c\u1ee5 th\u1ec3 gi\u00fap Client v\u00e0 l\u1eadp tr\u00ecnh vi\u00ean hi\u1ec3u ch\u00ednh x\u00e1c \u0111i\u1ec1u g\u00ec \u0111\u00e3 x\u1ea3y ra.<\/p>\n<figure id=\"attachment_28641\" aria-describedby=\"caption-attachment-28641\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Cau-truc-co-ban-cua-HTTP-Response.jpg\" alt=\"C\u1ea5u tr\u00fac c\u01a1 b\u1ea3n c\u1ee7a HTTP Response\" width=\"800\" height=\"500\" class=\"size-full wp-image-28641\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Cau-truc-co-ban-cua-HTTP-Response.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Cau-truc-co-ban-cua-HTTP-Response-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Cau-truc-co-ban-cua-HTTP-Response-768x480.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Cau-truc-co-ban-cua-HTTP-Response-750x469.jpg 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-28641\" class=\"wp-caption-text\">C\u1ea5u tr\u00fac c\u01a1 b\u1ea3n c\u1ee7a HTTP Response<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Cac-Tieu-de-Headers\"><\/span>C\u00e1c Ti\u00eau \u0111\u1ec1 (Headers)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ph\u1ea7n Headers ch\u1ee9a c\u00e1c d\u00f2ng th\u00f4ng tin b\u1ed5 sung (metadata) v\u1ec1 Response v\u00e0 Server. M\u1ed7i Header l\u00e0 m\u1ed9t c\u1eb7p <code>T\u00ean-ti\u00eau \u0111\u1ec1: Gi\u00e1 tr\u1ecb-ti\u00eau \u0111\u1ec1<\/code>. Ch\u00fang cung c\u1ea5p ng\u1eef c\u1ea3nh chi ti\u1ebft cho Response.<\/p>\n<p>Headers n\u1eb1m sau D\u00f2ng tr\u1ea1ng th\u00e1i v\u00e0 k\u1ebft th\u00fac b\u1eb1ng m\u1ed9t d\u00f2ng tr\u1ed1ng, b\u00e1o hi\u1ec7u ph\u1ea7n Body b\u1eaft \u0111\u1ea7u. Ch\u00fang l\u00e0 n\u01a1i Server &#8220;n\u00f3i th\u00eam&#8221; v\u1ec1 ph\u1ea3n h\u1ed3i ngo\u00e0i k\u1ebft qu\u1ea3 ch\u00ednh \u1edf Status Code.<\/p>\n<p>C\u00e1c Headers cung c\u1ea5p c\u00e1c ch\u1ec9 d\u1eabn quan tr\u1ecdng cho Client, nh\u01b0 c\u00e1ch x\u1eed l\u00fd n\u1ed9i dung (Content-Type), \u0111\u1ed9 d\u00e0i c\u1ee7a n\u1ed9i dung (Content-Length), ho\u1eb7c c\u00e1ch l\u01b0u tr\u1eef t\u1ea1m th\u1eddi (Cache-Control).<\/p>\n<p>V\u00ed d\u1ee5: Header <code>Content-Type: application\/json<\/code> cho bi\u1ebft n\u1ed9i dung ph\u1ea3n h\u1ed3i l\u00e0 \u0111\u1ecbnh d\u1ea1ng JSON. Header <code>Cache-Control: no-cache<\/code> y\u00eau c\u1ea7u Client kh\u00f4ng l\u01b0u Response n\u00e0y v\u00e0o b\u1ed9 nh\u1edb \u0111\u1ec7m.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Noi-dung-Body\"><\/span>N\u1ed9i dung (Body)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ph\u1ea7n Body ch\u1ee9a d\u1eef li\u1ec7u th\u1ef1c t\u1ebf m\u00e0 Server tr\u1ea3 v\u1ec1 cho Client sau khi x\u1eed l\u00fd Request. \u0110\u00e2y ch\u00ednh l\u00e0 &#8220;n\u1ed9i dung&#8221; m\u00e0 ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n quan t\u00e2m nh\u1ea5t.<\/p>\n<p>N\u1ed9i dung trong Body r\u1ea5t \u0111a d\u1ea1ng, c\u00f3 th\u1ec3 l\u00e0 m\u00e3 HTML c\u1ee7a m\u1ed9t trang web, d\u1eef li\u1ec7u JSON ho\u1eb7c XML cho ph\u1ea3n h\u1ed3i API, d\u1eef li\u1ec7u nh\u1ecb ph\u00e2n cho h\u00ecnh \u1ea3nh, video, ho\u1eb7c c\u00e1c lo\u1ea1i file kh\u00e1c.<\/p>\n<p>\u0110\u1ecbnh d\u1ea1ng c\u1ee7a d\u1eef li\u1ec7u trong Body th\u01b0\u1eddng \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh b\u1edfi Header <code>Content-Type<\/code>. Client s\u1ebd d\u1ef1a v\u00e0o th\u00f4ng tin n\u00e0y \u0111\u1ec3 x\u1eed l\u00fd v\u00e0 hi\u1ec3n th\u1ecb n\u1ed9i dung cho \u0111\u00fang.<\/p>\n<p>Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, Body c\u00f3 th\u1ec3 ho\u00e0n to\u00e0n tr\u1ed1ng, v\u00ed d\u1ee5 v\u1edbi Response ch\u1ec9 th\u00f4ng b\u00e1o th\u00e0nh c\u00f4ng (Status Code 204 No Content) ho\u1eb7c m\u1ed9t s\u1ed1 Response chuy\u1ec3n h\u01b0\u1edbng\/l\u1ed7i kh\u00f4ng c\u1ea7n k\u00e8m theo d\u1eef li\u1ec7u.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Phan-loai-ma-trang-thai-trong-HTTP-Response-Status-Code\"><\/span>Ph\u00e2n lo\u1ea1i m\u00e3 tr\u1ea1ng th\u00e1i trong HTTP Response (Status Code)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>M\u00e3 tr\u1ea1ng th\u00e1i l\u00e0 s\u1ed1 3 ch\u1eef s\u1ed1 quan tr\u1ecdng nh\u1ea5t trong Response, cho bi\u1ebft k\u1ebft qu\u1ea3 cu\u1ed1i c\u00f9ng c\u1ee7a Server \u0111\u1ed1i v\u1edbi Request. Ch\u00fang \u0111\u01b0\u1ee3c nh\u00f3m th\u00e0nh 5 l\u1edbp:<\/p>\n<p><strong>1xx (Informational):<\/strong> Y\u00eau c\u1ea7u \u0111\u00e3 \u0111\u01b0\u1ee3c nh\u1eadn v\u00e0 Server \u0111ang ti\u1ebfp t\u1ee5c x\u1eed l\u00fd. (V\u00ed d\u1ee5: <code>100 Continue<\/code>).<\/p>\n<p><strong>2xx (Success): <\/strong>Y\u00eau c\u1ea7u \u0111\u00e3 \u0111\u01b0\u1ee3c Server nh\u1eadn, hi\u1ec3u v\u00e0 x\u1eed l\u00fd th\u00e0nh c\u00f4ng. Client nh\u1eadn \u0111\u01b0\u1ee3c th\u00f4ng tin ho\u1eb7c x\u00e1c nh\u1eadn mong mu\u1ed1n.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>200 OK<\/strong>: Y\u00eau c\u1ea7u th\u00e0nh c\u00f4ng. Ph\u1ed5 bi\u1ebfn nh\u1ea5t.<\/li>\n<li><strong>201 Created<\/strong>: Y\u00eau c\u1ea7u t\u1ea1o m\u1ed9t t\u00e0i nguy\u00ean m\u1edbi th\u00e0nh c\u00f4ng (v\u00ed d\u1ee5: t\u1ea1o user, b\u00e0i vi\u1ebft).<\/li>\n<li><strong>204 No Content<\/strong>: Y\u00eau c\u1ea7u th\u00e0nh c\u00f4ng nh\u01b0ng kh\u00f4ng c\u00f3 n\u1ed9i dung n\u00e0o \u0111\u01b0\u1ee3c tr\u1ea3 v\u1ec1 trong Body (v\u00ed d\u1ee5: x\u00f3a th\u00e0nh c\u00f4ng m\u1ed9t t\u00e0i nguy\u00ean).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<figure id=\"attachment_28642\" aria-describedby=\"caption-attachment-28642\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Phan-loai-ma-trang-thai-trong-HTTP-Response.jpg\" alt=\"Ph\u00e2n lo\u1ea1i m\u00e3 tr\u1ea1ng th\u00e1i trong HTTP Response\" width=\"800\" height=\"500\" class=\"size-full wp-image-28642\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Phan-loai-ma-trang-thai-trong-HTTP-Response.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Phan-loai-ma-trang-thai-trong-HTTP-Response-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Phan-loai-ma-trang-thai-trong-HTTP-Response-768x480.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Phan-loai-ma-trang-thai-trong-HTTP-Response-750x469.jpg 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-28642\" class=\"wp-caption-text\">Ph\u00e2n lo\u1ea1i m\u00e3 tr\u1ea1ng th\u00e1i trong HTTP Response<\/figcaption><\/figure>\n<p><strong>3xx (Redirection): <\/strong>Client c\u1ea7n th\u1ef1c hi\u1ec7n th\u00eam m\u1ed9t h\u00e0nh \u0111\u1ed9ng n\u1eefa \u0111\u1ec3 ho\u00e0n t\u1ea5t y\u00eau c\u1ea7u, th\u01b0\u1eddng l\u00e0 chuy\u1ec3n h\u01b0\u1edbng \u0111\u1ebfn m\u1ed9t URL kh\u00e1c.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>301 Moved Permanently<\/strong>: T\u00e0i nguy\u00ean \u0111\u00e3 chuy\u1ec3n \u0111\u1ebfn URL m\u1edbi v\u0129nh vi\u1ec5n.<\/li>\n<li><strong>302 Found (tr\u01b0\u1edbc \u0111\u00e2y l\u00e0 Moved Temporarily)<\/strong>: T\u00e0i nguy\u00ean t\u1ea1m th\u1eddi \u1edf URL kh\u00e1c.<\/li>\n<li><strong>304 Not Modified<\/strong>: T\u00e0i nguy\u00ean ch\u01b0a thay \u0111\u1ed5i k\u1ec3 t\u1eeb l\u1ea7n cu\u1ed1i Client y\u00eau c\u1ea7u (s\u1eed d\u1ee5ng cache c\u1ee7a Client).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>4xx (Client Error): <\/strong>Server nh\u1eadn Request nh\u01b0ng ph\u00e1t hi\u1ec7n l\u1ed7i t\u1eeb ph\u00eda Client, Request kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c x\u1eed l\u00fd ho\u1eb7c t\u1eeb ch\u1ed1i.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>400 Bad Request<\/strong>: Server kh\u00f4ng hi\u1ec3u c\u00fa ph\u00e1p c\u1ee7a Request.<\/li>\n<li><strong>401 Unauthorized<\/strong>: Client c\u1ea7n x\u00e1c th\u1ef1c \u0111\u1ec3 truy c\u1eadp t\u00e0i nguy\u00ean.<\/li>\n<li><strong>403 Forbidden<\/strong>: Client \u0111\u00e3 x\u00e1c th\u1ef1c nh\u01b0ng kh\u00f4ng c\u00f3 quy\u1ec1n truy c\u1eadp t\u00e0i nguy\u00ean n\u00e0y.<\/li>\n<li><strong>404 Not Found<\/strong>: Server kh\u00f4ng t\u00ecm th\u1ea5y t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u (URL kh\u00f4ng t\u1ed3n t\u1ea1i).<\/li>\n<li><strong>405 Method Not Allowed<\/strong>: Ph\u01b0\u01a1ng th\u1ee9c HTTP (GET, POST) kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p cho t\u00e0i nguy\u00ean n\u00e0y.<\/li>\n<li><strong>408 Request Timeout<\/strong>: Server kh\u00f4ng nh\u1eadn \u0111\u1ee7 Request trong th\u1eddi gian quy \u0111\u1ecbnh.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>5xx (Server Error): <\/strong>Server g\u1eb7p l\u1ed7i n\u1ed9i b\u1ed9 khi \u0111ang x\u1eed l\u00fd Request h\u1ee3p l\u1ec7 t\u1eeb Client. L\u1ed7i t\u1eeb ph\u00eda Server.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>500 Internal Server Error<\/strong>: L\u1ed7i chung chung c\u1ee7a Server.<\/li>\n<li><strong>503 Service Unavailable<\/strong>: Server hi\u1ec7n kh\u00f4ng th\u1ec3 x\u1eed l\u00fd Request (qu\u00e1 t\u1ea3i ho\u1eb7c \u0111ang b\u1ea3o tr\u00ec).<\/li>\n<li><strong>504 Gateway Timeout<\/strong>: Server \u0111\u00f3ng vai tr\u00f2 Gateway ho\u1eb7c Proxy v\u00e0 kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c ph\u1ea3n h\u1ed3i k\u1ecbp th\u1eddi t\u1eeb Server Upstream.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Hi\u1ec3u r\u00f5 <strong>HTTP Response l\u00e0 g\u00ec<\/strong> l\u00e0 b\u01b0\u1edbc kh\u00f4ng th\u1ec3 thi\u1ebfu khi ph\u00e1t tri\u1ec3n \u1ee9ng d\u1ee5ng web ho\u1eb7c l\u00e0m vi\u1ec7c v\u1edbi API. T\u1eeb status code cho \u0111\u1ebfn headers v\u00e0 n\u1ed9i dung ph\u1ea3n h\u1ed3i, m\u1ed7i th\u00e0nh ph\u1ea7n \u0111\u1ec1u \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong qu\u00e1 tr\u00ecnh client v\u00e0 server giao ti\u1ebfp v\u1edbi nhau.<\/p>\n<p>Mong r\u1eb1ng b\u00e0i vi\u1ebft t\u1eeb <a href=\"https:\/\/interdata.vn\/\">InterData<\/a> \u0111\u00e3 gi\u00fap b\u1ea1n h\u00ecnh dung \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 c\u00e1ch HTTP Response ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u00e1ch gi\u1ea3i m\u00e3 ph\u1ea3n h\u1ed3i t\u1eeb m\u00e1y ch\u1ee7. D\u00f9 l\u00e0 ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u hay l\u1eadp tr\u00ecnh vi\u00ean c\u00f3 kinh nghi\u1ec7m, vi\u1ec7c n\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c n\u1ec1n t\u1ea3ng n\u00e0y s\u1ebd lu\u00f4n mang l\u1ea1i l\u1ee3i th\u1ebf trong vi\u1ec7c thi\u1ebft k\u1ebf v\u00e0 t\u1ed1i \u01b0u h\u1ec7 th\u1ed1ng web.<\/p>\n<p>Trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd HTTP Request v\u00e0 ph\u1ea3n h\u1ed3i HTTP Response, h\u1ec7 th\u1ed1ng backend c\u1ea7n m\u1ed9t m\u00f4i tr\u01b0\u1eddng m\u00e1y ch\u1ee7 \u0111\u1ee7 m\u1ea1nh \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u1ed1c \u0111\u1ed9 ph\u1ea3n h\u1ed3i v\u00e0 t\u00ednh \u1ed5n \u0111\u1ecbnh. D\u1ecbch v\u1ee5 <a href=\"https:\/\/interdata.vn\/thue-vps\/\">Thu\u00ea VPS<\/a> t\u1ea1i InterData s\u1eed d\u1ee5ng ph\u1ea7n c\u1ee9ng th\u1ebf h\u1ec7 m\u1edbi, s\u1eed d\u1ee5ng \u1ed5 c\u1ee9ng SSD NVMe U.2, gi\u00fap t\u1ed1i \u01b0u b\u0103ng th\u00f4ng v\u00e0 hi\u1ec7u su\u1ea5t x\u1eed l\u00fd. N\u1ebfu b\u1ea1n c\u1ea7n thu\u00ea VPS ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ec3 tri\u1ec3n khai web server, API ho\u1eb7c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi x\u1eed l\u00fd ph\u1ea3n h\u1ed3i nhanh \u2013 \u0111\u00e2y l\u00e0 l\u1ef1a ch\u1ecdn r\u1ea5t ph\u00f9 h\u1ee3p. Ngo\u00e0i ra, l\u1eadp tr\u00ecnh vi\u00ean c\u0169ng c\u00f3 th\u1ec3 ch\u1ecdn thu\u00ea <a href=\"https:\/\/interdata.vn\/vps-linux\">VPS Linux<\/a> \u0111\u1ec3 l\u00e0m ch\u1ee7 m\u00f4i tr\u01b0\u1eddng h\u1ec7 \u0111i\u1ec1u h\u00e0nh, ho\u1eb7c c\u1ea7n m\u1ed9t n\u1ec1n t\u1ea3ng VPS Linux gi\u00e1 r\u1ebb nh\u01b0ng v\u1eabn \u0111\u1ea3m b\u1ea3o uy t\u00edn cho h\u1ec7 th\u1ed1ng giao ti\u1ebfp qua HTTP.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>HTTP Response l\u00e0 th\u00f4ng \u0111i\u1ec7p ph\u1ea3n h\u1ed3i m\u00e0 m\u00e1y ch\u1ee7 g\u1eedi tr\u1ea3 v\u1ec1 sau khi nh\u1eadn v\u00e0 x\u1eed l\u00fd m\u1ed9t HTTP Request t\u1eeb client. \u0110\u00e2y ch\u00ednh l\u00e0 c\u1ea7u n\u1ed1i hai chi\u1ec1u trong giao ti\u1ebfp web, quy\u1ebft \u0111\u1ecbnh xem d\u1eef li\u1ec7u c\u00f3 \u0111\u01b0\u1ee3c tr\u1ea3 v\u1ec1 hay kh\u00f4ng v\u00e0 d\u01b0\u1edbi d\u1ea1ng n\u00e0o. Trong b\u00e0i vi\u1ebft n\u00e0y, InterData<\/p>\n","protected":false},"author":11,"featured_media":28643,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[140],"tags":[],"class_list":["post-28636","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lap-trinh"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/28636","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=28636"}],"version-history":[{"count":7,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/28636\/revisions"}],"predecessor-version":[{"id":30328,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/28636\/revisions\/30328"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/28643"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=28636"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=28636"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=28636"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}