{"id":22312,"date":"2025-05-27T15:15:15","date_gmt":"2025-05-27T12:15:15","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/http-verblerinde-idempotency-anlamak-node-js-ornekleriyle-gelistirici-kilavuzu\/"},"modified":"2025-05-27T15:15:15","modified_gmt":"2025-05-27T12:15:15","slug":"http-verblerinde-idempotency-anlamak-node-js-ornekleriyle-gelistirici-kilavuzu","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/http-verblerinde-idempotency-anlamak-node-js-ornekleriyle-gelistirici-kilavuzu\/","title":{"rendered":"HTTP Verblerinde \u0130dempotency Anlamak: Node.js \u00d6rnekleriyle Geli\u015ftirici K\u0131lavuzu"},"content":{"rendered":"<p><body><\/p>\n<p>HTTP Verblerinde \u0130dempotency Anlamak: Node.js \u00d6rnekleriyle Geli\u015ftirici K\u0131lavuzu<\/p>\n<p>Merhaba!  Bu makalede, REST API geli\u015ftirme s\u00fcrecinde s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131m\u0131z ve olduk\u00e7a \u00f6nemli bir kavram olan idempotency&#8217;yi (\u00f6zde\u015flik) ele alaca\u011f\u0131z.  \u00d6zellikle HTTP verbleri ba\u011flam\u0131nda idempotency&#8217;nin ne anlama geldi\u011fini, hangi verblerin idempotent oldu\u011funu ve Node.js ile nas\u0131l uygulanabilece\u011fini \u00f6rneklerle a\u00e7\u0131klayaca\u011f\u0131m.  \u00d6ncelikle idempotency kavram\u0131n\u0131 a\u00e7\u0131klayarak ba\u015flayal\u0131m.  \u0130dempotency, ayn\u0131 iste\u011fin birden fazla kez yap\u0131lmas\u0131 durumunda sistemin ayn\u0131 sonucu \u00fcretmesi anlam\u0131na gelir.  Ba\u015fka bir deyi\u015fle, bir i\u015flemin birden fazla \u00e7a\u011fr\u0131lmas\u0131, tek bir \u00e7a\u011fr\u0131 ile ayn\u0131 etkiye sahiptir. Bu durum, a\u011f hatalar\u0131 veya tekrarlanan istekler nedeniyle \u00f6nemlidir. \u00d6rne\u011fin, bir \u00f6deme i\u015flemi idempotent olmal\u0131d\u0131r \u00e7\u00fcnk\u00fc ayn\u0131 i\u015flemin tekrar yap\u0131lmas\u0131, iki kez \u00fccretlendirme gibi istenmeyen sonu\u00e7lara yol a\u00e7abilir.<\/p>\n<h2>\u0130dempotent ve \u0130dempotent Olmayan HTTP Metodlar\u0131<\/h2>\n<p>HTTP verblerinin idempotency durumlar\u0131 \u015funlard\u0131r:<\/p>\n<ul>\n<li><b>GET:<\/b> \u0130dempotenttir.  Ayn\u0131 URL&#8217;ye yap\u0131lan birden fazla GET iste\u011fi ayn\u0131 sonucu d\u00f6nd\u00fcr\u00fcr.  Veriyi de\u011fi\u015ftirmez, sadece okur.<\/li>\n<li><b>PUT:<\/b> \u0130dempotenttir.  Ayn\u0131 URL ve veri ile yap\u0131lan birden fazla PUT iste\u011fi ayn\u0131 sonucu \u00fcretir. Kayna\u011f\u0131 g\u00fcnceller, ancak her \u00e7a\u011fr\u0131da ayn\u0131 sonu\u00e7 olu\u015fturulur.<\/li>\n<li><b>DELETE:<\/b> \u0130dempotenttir.  Ayn\u0131 URL&#8217;ye yap\u0131lan birden fazla DELETE iste\u011fi, ayn\u0131 kayna\u011f\u0131 yaln\u0131zca bir kez siler.  Tekrarlanan istekler hi\u00e7bir de\u011fi\u015fikli\u011fe neden olmaz.<\/li>\n<li><b>POST:<\/b> \u0130dempotent <b>de\u011fildir<\/b>.  Ayn\u0131 POST iste\u011fi birden fazla kez g\u00f6nderildi\u011finde, her istek yeni bir kaynak olu\u015fturur.  Bu y\u00fczden, \u00f6deme gibi i\u015flemler i\u00e7in idempotency sa\u011flamak i\u00e7in ekstra mekanizmalar gerekir.<\/li>\n<\/ul>\n<h2>Node.js ile \u0130dempotency Uygulama \u00d6rnekleri<\/h2>\n<p>\u015eimdi, Node.js kullanarak POST isteklerinde idempotency&#8217;yi nas\u0131l sa\u011flayabilece\u011fimize bakal\u0131m.  Bunun i\u00e7in genellikle bir idempotency anahtar\u0131na ihtiya\u00e7 duyar\u0131z. Bu anahtar, her istek i\u00e7in benzersiz olmal\u0131 ve veritaban\u0131nda saklanmal\u0131d\u0131r.  \u0130stek tekrarlan\u0131rsa, anahtar kontrol edilir ve i\u015flem yaln\u0131zca bir kez ger\u00e7ekle\u015ftirilir.<\/p>\n<pre><code class=\"language-javascript\">\n\/\/ \u00d6rnek kod:  Idempotency anahtar\u0131n\u0131 kullanarak POST iste\u011fini idempotent hale getirmek\nconst express = require('express');\nconst app = express();\n\/\/ ... (Veritaban\u0131 ba\u011flant\u0131s\u0131 ve di\u011fer kodlar) ...\n\napp.post('\/payment', async (req, res) => {\n  const idempotencyKey = req.header('Idempotency-Key');\n  \/\/ ... (Idempotency anahtar\u0131n\u0131n veritaban\u0131nda kontrol edilmesi) ...\n  if (anahtarVarMi) {\n    res.status(200).send('\u00d6deme zaten i\u015flenmi\u015f.');\n  } else {\n    \/\/ ... (\u00d6deme i\u015flemi) ...\n    \/\/ ... (Idempotency anahtar\u0131n\u0131n veritaban\u0131na kaydedilmesi) ...\n    res.status(201).send('\u00d6deme ba\u015far\u0131l\u0131.');\n  }\n});\n\n\/\/ ... (Di\u011fer kodlar) ...\n<\/code><\/pre>\n<p>Bu \u00f6rnekte, her istek i\u00e7in benzersiz bir Idempotency-Key ba\u015fl\u0131\u011f\u0131 g\u00f6nderilir.  Sunucu, bu anahtar\u0131 kullanarak i\u015flemin daha \u00f6nce yap\u0131l\u0131p yap\u0131lmad\u0131\u011f\u0131n\u0131 kontrol eder ve gereksiz tekrarlar\u0131 \u00f6nler.  Bu, idempotency&#8217;yi sa\u011flaman\u0131n temel bir yoludur. Daha geli\u015fmi\u015f y\u00f6ntemler i\u00e7in da\u011f\u0131t\u0131lm\u0131\u015f veritabanlar\u0131 ve benzersiz i\u015flem kimlikleri kullan\u0131labilir.<\/p>\n<h2>Sonu\u00e7<\/h2>\n<p>\u0130dempotency, \u00f6zellikle tekrarlanan istekler veya a\u011f hatalar\u0131 durumunda, g\u00fcvenilir ve tutarl\u0131 API&#8217;ler olu\u015fturmak i\u00e7in kritik bir kavramd\u0131r.  HTTP verblerinin idempotency \u00f6zelliklerini anlamak ve  Node.js gibi platformlarda uygun mekanizmalar kullanarak idempotency&#8217;yi uygulamak, uygulamalar\u0131n\u0131z\u0131n sa\u011flaml\u0131\u011f\u0131n\u0131 ve g\u00fcvenilirli\u011fini art\u0131racakt\u0131r.  Umar\u0131m bu makale, idempotency konusunda size daha fazla bilgi sa\u011flam\u0131\u015ft\u0131r. Daha fazla bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> adresini ziyaret edebilirsiniz.<\/p>\n<p>#Etiketler: idempotency, HTTP, HTTP verbleri, Node.js, GET, POST, PUT, DELETE, REST API, idempotent, idempotent olmayan, tekrar deneme, hata y\u00f6netimi,  API geli\u015ftirme,  web geli\u015ftirme<\/p>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"HTTP Verblerinde \u0130dempotency Anlamak: Node.js \u00d6rnekleriyle Geli\u015ftirici K\u0131lavuzu Merhaba! Bu makalede, REST API geli\u015ftirme s\u00fcrecinde s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131m\u0131z ve&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-22312","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>HTTP Verblerinde \u0130dempotency Anlamak: Node.js \u00d6rnekleriyle Geli\u015ftirici K\u0131lavuzu<\/title>\n<meta name=\"description\" content=\"Merhaba! Bu makalede, REST API geli\u015ftirme s\u00fcrecinde s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131m\u0131z ve olduk\u00e7a \u00f6nemli bir kavram olan idempotency&#039;yi (\u00f6zde\u015flik) ele alaca\u011f\u0131z. \u00d6zellikle HTTP verbleri ba\u011flam\u0131nda idempotency&#039;nin ne anlama geldi\u011fini, hangi verblerin idempotent oldu\u011funu ve Node.js ile nas\u0131l uygulanabilece\u011fini \u00f6rneklerle a\u00e7\u0131klayaca\u011f\u0131m. \u00d6ncelikle idempotency kavram\u0131n\u0131 a\u00e7\u0131klayarak ba\u015flayal\u0131m. \u0130dempotency, ayn\u0131 iste\u011fin birden fazla kez yap\u0131lmas\u0131 durumunda sistemin ayn\u0131 sonucu \u00fcretmesi anlam\u0131na gelir. Ba\u015fka bir deyi\u015fle, bir i\u015flemin birden fazla \u00e7a\u011fr\u0131lmas\u0131, tek bir \u00e7a\u011fr\u0131 ile ayn\u0131 etkiye sahiptir. Bu durum, a\u011f hatalar\u0131 veya tekrarlanan istekler nedeniyle \u00f6nemlidir. \u00d6rne\u011fin, bir \u00f6deme i\u015flemi idempotent olmal\u0131d\u0131r \u00e7\u00fcnk\u00fc ayn\u0131 i\u015flemin tekrar yap\u0131lmas\u0131, iki kez \u00fccretlendirme gibi istenmeyen sonu\u00e7lara yol a\u00e7abilir.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/http-verblerinde-idempotency-anlamak-node-js-ornekleriyle-gelistirici-kilavuzu\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HTTP Verblerinde \u0130dempotency Anlamak: Node.js \u00d6rnekleriyle Geli\u015ftirici K\u0131lavuzu\" \/>\n<meta property=\"og:description\" content=\"Merhaba! Bu makalede, REST API geli\u015ftirme s\u00fcrecinde s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131m\u0131z ve olduk\u00e7a \u00f6nemli bir kavram olan idempotency&#039;yi (\u00f6zde\u015flik) ele alaca\u011f\u0131z. \u00d6zellikle HTTP verbleri ba\u011flam\u0131nda idempotency&#039;nin ne anlama geldi\u011fini, hangi verblerin idempotent oldu\u011funu ve Node.js ile nas\u0131l uygulanabilece\u011fini \u00f6rneklerle a\u00e7\u0131klayaca\u011f\u0131m. \u00d6ncelikle idempotency kavram\u0131n\u0131 a\u00e7\u0131klayarak ba\u015flayal\u0131m. \u0130dempotency, ayn\u0131 iste\u011fin birden fazla kez yap\u0131lmas\u0131 durumunda sistemin ayn\u0131 sonucu \u00fcretmesi anlam\u0131na gelir. Ba\u015fka bir deyi\u015fle, bir i\u015flemin birden fazla \u00e7a\u011fr\u0131lmas\u0131, tek bir \u00e7a\u011fr\u0131 ile ayn\u0131 etkiye sahiptir. Bu durum, a\u011f hatalar\u0131 veya tekrarlanan istekler nedeniyle \u00f6nemlidir. \u00d6rne\u011fin, bir \u00f6deme i\u015flemi idempotent olmal\u0131d\u0131r \u00e7\u00fcnk\u00fc ayn\u0131 i\u015flemin tekrar yap\u0131lmas\u0131, iki kez \u00fccretlendirme gibi istenmeyen sonu\u00e7lara yol a\u00e7abilir.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/http-verblerinde-idempotency-anlamak-node-js-ornekleriyle-gelistirici-kilavuzu\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-05-27T12:15:15+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/http-verblerinde-idempotency-anlamak-node-js-ornekleriyle-gelistirici-kilavuzu\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/http-verblerinde-idempotency-anlamak-node-js-ornekleriyle-gelistirici-kilavuzu\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"HTTP Verblerinde \u0130dempotency Anlamak: Node.js \u00d6rnekleriyle Geli\u015ftirici K\u0131lavuzu\",\"datePublished\":\"2025-05-27T12:15:15+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/http-verblerinde-idempotency-anlamak-node-js-ornekleriyle-gelistirici-kilavuzu\/\"},\"wordCount\":515,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/http-verblerinde-idempotency-anlamak-node-js-ornekleriyle-gelistirici-kilavuzu\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/http-verblerinde-idempotency-anlamak-node-js-ornekleriyle-gelistirici-kilavuzu\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/http-verblerinde-idempotency-anlamak-node-js-ornekleriyle-gelistirici-kilavuzu\/\",\"name\":\"HTTP Verblerinde \u0130dempotency Anlamak: Node.js \u00d6rnekleriyle Geli\u015ftirici K\u0131lavuzu\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-05-27T12:15:15+00:00\",\"description\":\"Merhaba! Bu makalede, REST API geli\u015ftirme s\u00fcrecinde s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131m\u0131z ve olduk\u00e7a \u00f6nemli bir kavram olan idempotency'yi (\u00f6zde\u015flik) ele alaca\u011f\u0131z. \u00d6zellikle HTTP verbleri ba\u011flam\u0131nda idempotency'nin ne anlama geldi\u011fini, hangi verblerin idempotent oldu\u011funu ve Node.js ile nas\u0131l uygulanabilece\u011fini \u00f6rneklerle a\u00e7\u0131klayaca\u011f\u0131m. \u00d6ncelikle idempotency kavram\u0131n\u0131 a\u00e7\u0131klayarak ba\u015flayal\u0131m. \u0130dempotency, ayn\u0131 iste\u011fin birden fazla kez yap\u0131lmas\u0131 durumunda sistemin ayn\u0131 sonucu \u00fcretmesi anlam\u0131na gelir. Ba\u015fka bir deyi\u015fle, bir i\u015flemin birden fazla \u00e7a\u011fr\u0131lmas\u0131, tek bir \u00e7a\u011fr\u0131 ile ayn\u0131 etkiye sahiptir. 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Bu makalede, REST API geli\u015ftirme s\u00fcrecinde s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131m\u0131z ve olduk\u00e7a \u00f6nemli bir kavram olan idempotency'yi (\u00f6zde\u015flik) ele alaca\u011f\u0131z. \u00d6zellikle HTTP verbleri ba\u011flam\u0131nda idempotency'nin ne anlama geldi\u011fini, hangi verblerin idempotent oldu\u011funu ve Node.js ile nas\u0131l uygulanabilece\u011fini \u00f6rneklerle a\u00e7\u0131klayaca\u011f\u0131m. \u00d6ncelikle idempotency kavram\u0131n\u0131 a\u00e7\u0131klayarak ba\u015flayal\u0131m. \u0130dempotency, ayn\u0131 iste\u011fin birden fazla kez yap\u0131lmas\u0131 durumunda sistemin ayn\u0131 sonucu \u00fcretmesi anlam\u0131na gelir. Ba\u015fka bir deyi\u015fle, bir i\u015flemin birden fazla \u00e7a\u011fr\u0131lmas\u0131, tek bir \u00e7a\u011fr\u0131 ile ayn\u0131 etkiye sahiptir. 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