JavaScript’te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir<\/title><br \/>\n<\/head><br \/>\n<body><\/p>\n<p>JavaScript’te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir<\/p>\n<p>Merhaba! Fatih Soysal olarak, bug\u00fcn JavaScript’te s\u0131kl\u0131kla kar\u015f\u0131la\u015f\u0131lan, ancak dikkatli kullan\u0131lmas\u0131 gereken bir fonksiyondan, <code>eval()<\/code> fonksiyonundan bahsedece\u011fim. \u00d6ncelikle, <code>eval()<\/code>‘in ne oldu\u011funu ve neden bu kadar tehlikeli oldu\u011funu ayr\u0131nt\u0131l\u0131 olarak ele alal\u0131m. Ard\u0131ndan, g\u00fcvenli alternatiflerine ve olas\u0131 risklerini azaltma yollar\u0131na de\u011finece\u011fiz. Bu makale, JavaScript kodlar\u0131n\u0131z\u0131n g\u00fcvenli\u011fini sa\u011flaman\u0131zda size yard\u0131mc\u0131 olmay\u0131 ama\u00e7lamaktad\u0131r.<\/p>\n<h2>eval() Fonksiyonu Nedir?<\/h2>\n<p><code>eval()<\/code> fonksiyonu, JavaScript’te bir metin dizesini JavaScript kodu olarak \u00e7al\u0131\u015ft\u0131rmaya yarar. Basit\u00e7e s\u00f6ylemek gerekirse, metin bi\u00e7imindeki bir kodu, do\u011frudan \u00e7al\u0131\u015ft\u0131r\u0131labilir bir kod haline d\u00f6n\u00fc\u015ft\u00fcr\u00fcr. Bu \u00f6zellik, baz\u0131 durumlarda son derece kullan\u0131\u015fl\u0131 olsa da, ayn\u0131 zamanda b\u00fcy\u00fck g\u00fcvenlik riskleri ta\u015f\u0131r.<\/p>\n<p>\u00d6rne\u011fin, kullan\u0131c\u0131dan gelen bir girdiyi do\u011frudan <code>eval()<\/code> ile \u00e7al\u0131\u015ft\u0131rmak, k\u00f6t\u00fc ama\u00e7l\u0131 kodlar\u0131n \u00e7al\u0131\u015ft\u0131r\u0131lmas\u0131na ve sisteminizin g\u00fcvenli\u011finin tehlikeye girmesine neden olabilir. Bu durum, \u00f6zellikle web uygulamalar\u0131nda b\u00fcy\u00fck bir tehdit olu\u015fturur. Bu nedenle, <code>eval()<\/code> fonksiyonunu kullan\u0131rken son derece dikkatli olmak ve olas\u0131 g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 g\u00f6z \u00f6n\u00fcnde bulundurmak son derece \u00f6nemlidir.<\/p>\n<h2>eval()’in Tehlikeleri<\/h2>\n<p><code>eval()<\/code> fonksiyonunun en b\u00fcy\u00fck tehlikesi, kod enjeksiyonuna a\u00e7\u0131k olmas\u0131d\u0131r. Kullan\u0131c\u0131dan gelen verileri do\u011frudan <code>eval()<\/code>‘e g\u00f6nderdi\u011finizde, kullan\u0131c\u0131 k\u00f6t\u00fc ama\u00e7l\u0131 kodlar girerek sisteminizi ele ge\u00e7irebilir. Bu durum, veri taban\u0131n\u0131z\u0131n \u00e7al\u0131nmas\u0131, sisteminizin \u00e7\u00f6kmesi veya di\u011fer zararl\u0131 eylemlerle sonu\u00e7lanabilir. Bu y\u00fczden, kullan\u0131c\u0131 girdilerini do\u011frudan <code>eval()<\/code>‘e g\u00f6ndermekten kesinlikle ka\u00e7\u0131n\u0131lmal\u0131d\u0131r.<\/p>\n<p>Ayr\u0131ca, <code>eval()<\/code> performans sorunlar\u0131na da yol a\u00e7abilir. \u00c7\u00fcnk\u00fc, JavaScript motoru her <code>eval()<\/code> \u00e7a\u011fr\u0131s\u0131nda kodu yeniden derlemelidir. Bu i\u015flem, \u00f6zellikle b\u00fcy\u00fck ve karma\u015f\u0131k kodlar i\u00e7in performans kayb\u0131na neden olabilir. Bu nedenle, performans\u0131n \u00f6nemli oldu\u011fu durumlarda <code>eval()<\/code> kullanmaktan ka\u00e7\u0131nmak daha iyi olabilir. Ba\u015fka bir deyi\u015fle, performans a\u00e7\u0131s\u0131ndan daha verimli alternatifler tercih edilmelidir.<\/p>\n<h2>eval()’e G\u00fcvenli Alternatifler<\/h2>\n<p><code>eval()<\/code> yerine kullanabilece\u011finiz bir\u00e7ok g\u00fcvenli alternatif mevcuttur. \u00d6rne\u011fin, JSON.parse() fonksiyonu, JSON verilerini ayr\u0131\u015ft\u0131rmak i\u00e7in kullan\u0131labilir. Bu fonksiyon, g\u00fcvenlik a\u00e7\u0131s\u0131ndan daha g\u00fcvenlidir \u00e7\u00fcnk\u00fc yaln\u0131zca JSON verilerini i\u015fler ve k\u00f6t\u00fc ama\u00e7l\u0131 kodlar\u0131n \u00e7al\u0131\u015ft\u0131r\u0131lmas\u0131n\u0131 engeller. Bununla birlikte, fonksiyonel programlama yakla\u015f\u0131mlar\u0131 veya \u00f6nceden tan\u0131mlanm\u0131\u015f fonksiyonlar\u0131 kullanmak da daha g\u00fcvenli ve performansl\u0131 \u00e7\u00f6z\u00fcmler sunar.<\/p>\n<p>\u0130\u015fte baz\u0131 g\u00fcvenli alternatifler:<\/p>\n<ul>\n<li><code>JSON.parse()<\/code>: JSON verilerini ayr\u0131\u015ft\u0131rmak i\u00e7in g\u00fcvenli bir alternatiftir.<\/li>\n<li>Fonksiyonel programlama:<\/li>\n<li>\u00d6nceden tan\u0131mlanm\u0131\u015f fonksiyonlar:<\/li>\n<\/ul>\n<h2>Sonu\u00e7<\/h2>\n<p><code>eval()<\/code> fonksiyonu, JavaScript’te g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r, ancak yanl\u0131\u015f kullan\u0131ld\u0131\u011f\u0131nda ciddi g\u00fcvenlik risklerine yol a\u00e7abilir. Bu nedenle, <code>eval()<\/code> fonksiyonunu kullan\u0131rken son derece dikkatli olmak ve m\u00fcmk\u00fcn oldu\u011funca g\u00fcvenli alternatiflerini tercih etmek \u00f6nemlidir. Kendi sitenizde <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> daha detayl\u0131 bilgi ve \u00f6rnekler bulabilirsiniz. Bu makalede bahsedilen konular hakk\u0131nda daha fazla bilgi edinmek i\u00e7in <a href=\"https:\/\/dev.to\/mrsupercraft\/why-eval-could-be-your-javascript-codes-worst-enemy-i7p\">buraya<\/a> t\u0131klayabilirsiniz.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/via.placeholder.com\/500x300.png?text=Eval+Fonksiyonu+Resmi\" alt=\"Eval Fonksiyonu Resmi\"><\/p>\n<p>Umar\u0131m bu makale, JavaScript kodlar\u0131n\u0131z\u0131n g\u00fcvenli\u011fini sa\u011flaman\u0131zda size yard\u0131mc\u0131 olmu\u015ftur. Herhangi bir sorunuz varsa, l\u00fctfen yorumlarda bana bildirin.<\/p>\n<p>#Etiketler: eval(), javascript, g\u00fcvenlik, kod enjeksiyonu, g\u00fcvenli alternatifler, JSON.parse(), performans, web uygulamalar\u0131, Fatih Soysal<\/p>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"JavaScript’te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir JavaScript’te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir Merhaba! Fatih Soysal olarak, bug\u00fcn JavaScript’te…","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-4166","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\n<title>JavaScript'te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir<\/title>\n<meta name=\"description\" content=\"Merhaba! Fatih Soysal olarak, bug\u00fcn JavaScript'te s\u0131kl\u0131kla kar\u015f\u0131la\u015f\u0131lan, ancak dikkatli kullan\u0131lmas\u0131 gereken bir fonksiyondan, eval() fonksiyonundan bahsedece\u011fim. \u00d6ncelikle, eval()'in ne oldu\u011funu ve neden bu kadar tehlikeli oldu\u011funu ayr\u0131nt\u0131l\u0131 olarak ele alal\u0131m. Ard\u0131ndan, g\u00fcvenli alternatiflerine ve olas\u0131 risklerini azaltma yollar\u0131na de\u011finece\u011fiz. Bu makale, JavaScript kodlar\u0131n\u0131z\u0131n g\u00fcvenli\u011fini sa\u011flaman\u0131zda size yard\u0131mc\u0131 olmay\u0131 ama\u00e7lamaktad\u0131r.\" \/>\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\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JavaScript'te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir\" \/>\n<meta property=\"og:description\" content=\"Merhaba! Fatih Soysal olarak, bug\u00fcn JavaScript'te s\u0131kl\u0131kla kar\u015f\u0131la\u015f\u0131lan, ancak dikkatli kullan\u0131lmas\u0131 gereken bir fonksiyondan, eval() fonksiyonundan bahsedece\u011fim. \u00d6ncelikle, eval()'in ne oldu\u011funu ve neden bu kadar tehlikeli oldu\u011funu ayr\u0131nt\u0131l\u0131 olarak ele alal\u0131m. Ard\u0131ndan, g\u00fcvenli alternatiflerine ve olas\u0131 risklerini azaltma yollar\u0131na de\u011finece\u011fiz. Bu makale, JavaScript kodlar\u0131n\u0131z\u0131n g\u00fcvenli\u011fini sa\u011flaman\u0131zda size yard\u0131mc\u0131 olmay\u0131 ama\u00e7lamaktad\u0131r.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2024-11-17T22:00:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/via.placeholder.com\/500x300.png?text=Eval+Fonksiyonu+Resmi\" \/>\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\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"JavaScript’te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir\",\"datePublished\":\"2024-11-17T22:00:20+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/\"},\"wordCount\":599,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"image\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/via.placeholder.com\/500x300.png?text=Eval+Fonksiyonu+Resmi\",\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/#respond\"]}],\"copyrightYear\":\"2024\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/\",\"name\":\"JavaScript'te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/via.placeholder.com\/500x300.png?text=Eval+Fonksiyonu+Resmi\",\"datePublished\":\"2024-11-17T22:00:20+00:00\",\"description\":\"Merhaba! Fatih Soysal olarak, bug\u00fcn JavaScript'te s\u0131kl\u0131kla kar\u015f\u0131la\u015f\u0131lan, ancak dikkatli kullan\u0131lmas\u0131 gereken bir fonksiyondan, eval() fonksiyonundan bahsedece\u011fim. \u00d6ncelikle, eval()'in ne oldu\u011funu ve neden bu kadar tehlikeli oldu\u011funu ayr\u0131nt\u0131l\u0131 olarak ele alal\u0131m. Ard\u0131ndan, g\u00fcvenli alternatiflerine ve olas\u0131 risklerini azaltma yollar\u0131na de\u011finece\u011fiz. 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Fatih Soysal olarak, bug\u00fcn JavaScript'te s\u0131kl\u0131kla kar\u015f\u0131la\u015f\u0131lan, ancak dikkatli kullan\u0131lmas\u0131 gereken bir fonksiyondan, eval() fonksiyonundan bahsedece\u011fim. \u00d6ncelikle, eval()'in ne oldu\u011funu ve neden bu kadar tehlikeli oldu\u011funu ayr\u0131nt\u0131l\u0131 olarak ele alal\u0131m. Ard\u0131ndan, g\u00fcvenli alternatiflerine ve olas\u0131 risklerini azaltma yollar\u0131na de\u011finece\u011fiz. Bu makale, JavaScript kodlar\u0131n\u0131z\u0131n g\u00fcvenli\u011fini sa\u011flaman\u0131zda size yard\u0131mc\u0131 olmay\u0131 ama\u00e7lamaktad\u0131r.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/fatihsoysal.com\/blog\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/","og_locale":"tr_TR","og_type":"article","og_title":"JavaScript'te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir","og_description":"Merhaba! Fatih Soysal olarak, bug\u00fcn JavaScript'te s\u0131kl\u0131kla kar\u015f\u0131la\u015f\u0131lan, ancak dikkatli kullan\u0131lmas\u0131 gereken bir fonksiyondan, eval() fonksiyonundan bahsedece\u011fim. \u00d6ncelikle, eval()'in ne oldu\u011funu ve neden bu kadar tehlikeli oldu\u011funu ayr\u0131nt\u0131l\u0131 olarak ele alal\u0131m. Ard\u0131ndan, g\u00fcvenli alternatiflerine ve olas\u0131 risklerini azaltma yollar\u0131na de\u011finece\u011fiz. 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Bu makale, JavaScript kodlar\u0131n\u0131z\u0131n g\u00fcvenli\u011fini sa\u011flaman\u0131zda size yard\u0131mc\u0131 olmay\u0131 ama\u00e7lamaktad\u0131r.","breadcrumb":{"@id":"https:\/\/fatihsoysal.com\/blog\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/#breadcrumb"},"inLanguage":"tr","potentialAction":[{"@type":"ReadAction","target":["https:\/\/fatihsoysal.com\/blog\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/"]}]},{"@type":"ImageObject","inLanguage":"tr","@id":"https:\/\/fatihsoysal.com\/blog\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/#primaryimage","url":"https:\/\/via.placeholder.com\/500x300.png?text=Eval+Fonksiyonu+Resmi","contentUrl":"https:\/\/via.placeholder.com\/500x300.png?text=Eval+Fonksiyonu+Resmi"},{"@type":"BreadcrumbList","@id":"https:\/\/fatihsoysal.com\/blog\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Anasayfa","item":"https:\/\/fatihsoysal.com\/blog\/"},{"@type":"ListItem","position":2,"name":"JavaScript’te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir"}]},{"@type":"WebSite","@id":"https:\/\/fatihsoysal.com\/blog\/#website","url":"https:\/\/fatihsoysal.com\/blog\/","name":"Fatihsoysal.com","description":"Blog - Yaz\u0131l\u0131m D\u00fcnyas\u0131 Tecr\u00fcbelerim","publisher":{"@id":"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/fatihsoysal.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"tr"},{"@type":["Person","Organization"],"@id":"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1","name":"Fatih Soysal","image":{"@type":"ImageObject","inLanguage":"tr","@id":"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/fatihsoysal.com\/blog\/wp-content\/uploads\/2024\/04\/cropped-replicate-prediction-3kgg1hgjn5rgp0cf0p5tr0jw7w-1.png","contentUrl":"https:\/\/fatihsoysal.com\/blog\/wp-content\/uploads\/2024\/04\/cropped-replicate-prediction-3kgg1hgjn5rgp0cf0p5tr0jw7w-1.png","width":512,"height":512,"caption":"Fatih Soysal"},"logo":{"@id":"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/image\/"},"description":"Kullan\u0131m ve kodlama m\u00fckemmeliyetini odak alan uygulamalar olu\u015fturma deneyimine sahip, profesyonel olarak 15+ y\u0131l \u00fczeri deneyime sahip bir yaz\u0131l\u0131m m\u00fchendisi.","url":"https:\/\/fatihsoysal.com\/blog\/author\/fatihsoysal\/"}]}},"yoast_meta":{"yoast_wpseo_title":"","yoast_wpseo_metadesc":"","yoast_wpseo_canonical":""},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/fatihsoysal.com\/blog\/wp-json\/wp\/v2\/posts\/4166","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fatihsoysal.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fatihsoysal.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fatihsoysal.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fatihsoysal.com\/blog\/wp-json\/wp\/v2\/comments?post=4166"}],"version-history":[{"count":0,"href":"https:\/\/fatihsoysal.com\/blog\/wp-json\/wp\/v2\/posts\/4166\/revisions"}],"wp:attachment":[{"href":"https:\/\/fatihsoysal.com\/blog\/wp-json\/wp\/v2\/media?parent=4166"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fatihsoysal.com\/blog\/wp-json\/wp\/v2\/categories?post=4166"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fatihsoysal.com\/blog\/wp-json\/wp\/v2\/tags?post=4166"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":4166,"date":"2024-11-18T01:00:20","date_gmt":"2024-11-17T22:00:20","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/"},"modified":"2024-11-18T01:00:20","modified_gmt":"2024-11-17T22:00:20","slug":"javascriptte-eval-en-buyuk-dusmaniniz-olabilir","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/","title":{"rendered":"JavaScript’te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir"},"content":{"rendered":"

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\n JavaScript’te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir<\/title><br \/>\n<\/head><br \/>\n<body><\/p>\n<p>JavaScript’te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir<\/p>\n<p>Merhaba! Fatih Soysal olarak, bug\u00fcn JavaScript’te s\u0131kl\u0131kla kar\u015f\u0131la\u015f\u0131lan, ancak dikkatli kullan\u0131lmas\u0131 gereken bir fonksiyondan, <code>eval()<\/code> fonksiyonundan bahsedece\u011fim. \u00d6ncelikle, <code>eval()<\/code>‘in ne oldu\u011funu ve neden bu kadar tehlikeli oldu\u011funu ayr\u0131nt\u0131l\u0131 olarak ele alal\u0131m. Ard\u0131ndan, g\u00fcvenli alternatiflerine ve olas\u0131 risklerini azaltma yollar\u0131na de\u011finece\u011fiz. Bu makale, JavaScript kodlar\u0131n\u0131z\u0131n g\u00fcvenli\u011fini sa\u011flaman\u0131zda size yard\u0131mc\u0131 olmay\u0131 ama\u00e7lamaktad\u0131r.<\/p>\n<h2>eval() Fonksiyonu Nedir?<\/h2>\n<p><code>eval()<\/code> fonksiyonu, JavaScript’te bir metin dizesini JavaScript kodu olarak \u00e7al\u0131\u015ft\u0131rmaya yarar. Basit\u00e7e s\u00f6ylemek gerekirse, metin bi\u00e7imindeki bir kodu, do\u011frudan \u00e7al\u0131\u015ft\u0131r\u0131labilir bir kod haline d\u00f6n\u00fc\u015ft\u00fcr\u00fcr. Bu \u00f6zellik, baz\u0131 durumlarda son derece kullan\u0131\u015fl\u0131 olsa da, ayn\u0131 zamanda b\u00fcy\u00fck g\u00fcvenlik riskleri ta\u015f\u0131r.<\/p>\n<p>\u00d6rne\u011fin, kullan\u0131c\u0131dan gelen bir girdiyi do\u011frudan <code>eval()<\/code> ile \u00e7al\u0131\u015ft\u0131rmak, k\u00f6t\u00fc ama\u00e7l\u0131 kodlar\u0131n \u00e7al\u0131\u015ft\u0131r\u0131lmas\u0131na ve sisteminizin g\u00fcvenli\u011finin tehlikeye girmesine neden olabilir. Bu durum, \u00f6zellikle web uygulamalar\u0131nda b\u00fcy\u00fck bir tehdit olu\u015fturur. Bu nedenle, <code>eval()<\/code> fonksiyonunu kullan\u0131rken son derece dikkatli olmak ve olas\u0131 g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 g\u00f6z \u00f6n\u00fcnde bulundurmak son derece \u00f6nemlidir.<\/p>\n<h2>eval()’in Tehlikeleri<\/h2>\n<p><code>eval()<\/code> fonksiyonunun en b\u00fcy\u00fck tehlikesi, kod enjeksiyonuna a\u00e7\u0131k olmas\u0131d\u0131r. Kullan\u0131c\u0131dan gelen verileri do\u011frudan <code>eval()<\/code>‘e g\u00f6nderdi\u011finizde, kullan\u0131c\u0131 k\u00f6t\u00fc ama\u00e7l\u0131 kodlar girerek sisteminizi ele ge\u00e7irebilir. Bu durum, veri taban\u0131n\u0131z\u0131n \u00e7al\u0131nmas\u0131, sisteminizin \u00e7\u00f6kmesi veya di\u011fer zararl\u0131 eylemlerle sonu\u00e7lanabilir. Bu y\u00fczden, kullan\u0131c\u0131 girdilerini do\u011frudan <code>eval()<\/code>‘e g\u00f6ndermekten kesinlikle ka\u00e7\u0131n\u0131lmal\u0131d\u0131r.<\/p>\n<p>Ayr\u0131ca, <code>eval()<\/code> performans sorunlar\u0131na da yol a\u00e7abilir. \u00c7\u00fcnk\u00fc, JavaScript motoru her <code>eval()<\/code> \u00e7a\u011fr\u0131s\u0131nda kodu yeniden derlemelidir. Bu i\u015flem, \u00f6zellikle b\u00fcy\u00fck ve karma\u015f\u0131k kodlar i\u00e7in performans kayb\u0131na neden olabilir. Bu nedenle, performans\u0131n \u00f6nemli oldu\u011fu durumlarda <code>eval()<\/code> kullanmaktan ka\u00e7\u0131nmak daha iyi olabilir. Ba\u015fka bir deyi\u015fle, performans a\u00e7\u0131s\u0131ndan daha verimli alternatifler tercih edilmelidir.<\/p>\n<h2>eval()’e G\u00fcvenli Alternatifler<\/h2>\n<p><code>eval()<\/code> yerine kullanabilece\u011finiz bir\u00e7ok g\u00fcvenli alternatif mevcuttur. \u00d6rne\u011fin, JSON.parse() fonksiyonu, JSON verilerini ayr\u0131\u015ft\u0131rmak i\u00e7in kullan\u0131labilir. Bu fonksiyon, g\u00fcvenlik a\u00e7\u0131s\u0131ndan daha g\u00fcvenlidir \u00e7\u00fcnk\u00fc yaln\u0131zca JSON verilerini i\u015fler ve k\u00f6t\u00fc ama\u00e7l\u0131 kodlar\u0131n \u00e7al\u0131\u015ft\u0131r\u0131lmas\u0131n\u0131 engeller. Bununla birlikte, fonksiyonel programlama yakla\u015f\u0131mlar\u0131 veya \u00f6nceden tan\u0131mlanm\u0131\u015f fonksiyonlar\u0131 kullanmak da daha g\u00fcvenli ve performansl\u0131 \u00e7\u00f6z\u00fcmler sunar.<\/p>\n<p>\u0130\u015fte baz\u0131 g\u00fcvenli alternatifler:<\/p>\n<ul>\n<li><code>JSON.parse()<\/code>: JSON verilerini ayr\u0131\u015ft\u0131rmak i\u00e7in g\u00fcvenli bir alternatiftir.<\/li>\n<li>Fonksiyonel programlama:<\/li>\n<li>\u00d6nceden tan\u0131mlanm\u0131\u015f fonksiyonlar:<\/li>\n<\/ul>\n<h2>Sonu\u00e7<\/h2>\n<p><code>eval()<\/code> fonksiyonu, JavaScript’te g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r, ancak yanl\u0131\u015f kullan\u0131ld\u0131\u011f\u0131nda ciddi g\u00fcvenlik risklerine yol a\u00e7abilir. Bu nedenle, <code>eval()<\/code> fonksiyonunu kullan\u0131rken son derece dikkatli olmak ve m\u00fcmk\u00fcn oldu\u011funca g\u00fcvenli alternatiflerini tercih etmek \u00f6nemlidir. Kendi sitenizde <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> daha detayl\u0131 bilgi ve \u00f6rnekler bulabilirsiniz. Bu makalede bahsedilen konular hakk\u0131nda daha fazla bilgi edinmek i\u00e7in <a href=\"https:\/\/dev.to\/mrsupercraft\/why-eval-could-be-your-javascript-codes-worst-enemy-i7p\">buraya<\/a> t\u0131klayabilirsiniz.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/via.placeholder.com\/500x300.png?text=Eval+Fonksiyonu+Resmi\" alt=\"Eval Fonksiyonu Resmi\"><\/p>\n<p>Umar\u0131m bu makale, JavaScript kodlar\u0131n\u0131z\u0131n g\u00fcvenli\u011fini sa\u011flaman\u0131zda size yard\u0131mc\u0131 olmu\u015ftur. Herhangi bir sorunuz varsa, l\u00fctfen yorumlarda bana bildirin.<\/p>\n<p>#Etiketler: eval(), javascript, g\u00fcvenlik, kod enjeksiyonu, g\u00fcvenli alternatifler, JSON.parse(), performans, web uygulamalar\u0131, Fatih Soysal<\/p>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"JavaScript’te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir JavaScript’te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir Merhaba! Fatih Soysal olarak, bug\u00fcn JavaScript’te…","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-4166","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\n<title>JavaScript'te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir<\/title>\n<meta name=\"description\" content=\"Merhaba! Fatih Soysal olarak, bug\u00fcn JavaScript'te s\u0131kl\u0131kla kar\u015f\u0131la\u015f\u0131lan, ancak dikkatli kullan\u0131lmas\u0131 gereken bir fonksiyondan, eval() fonksiyonundan bahsedece\u011fim. \u00d6ncelikle, eval()'in ne oldu\u011funu ve neden bu kadar tehlikeli oldu\u011funu ayr\u0131nt\u0131l\u0131 olarak ele alal\u0131m. Ard\u0131ndan, g\u00fcvenli alternatiflerine ve olas\u0131 risklerini azaltma yollar\u0131na de\u011finece\u011fiz. Bu makale, JavaScript kodlar\u0131n\u0131z\u0131n g\u00fcvenli\u011fini sa\u011flaman\u0131zda size yard\u0131mc\u0131 olmay\u0131 ama\u00e7lamaktad\u0131r.\" \/>\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\/javascriptte-eval-en-buyuk-dusmaniniz-olabilir\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JavaScript'te eval(): En B\u00fcy\u00fck D\u00fc\u015fman\u0131n\u0131z Olabilir\" \/>\n<meta property=\"og:description\" content=\"Merhaba! Fatih Soysal olarak, bug\u00fcn JavaScript'te s\u0131kl\u0131kla kar\u015f\u0131la\u015f\u0131lan, ancak dikkatli kullan\u0131lmas\u0131 gereken bir fonksiyondan, eval() fonksiyonundan bahsedece\u011fim. \u00d6ncelikle, eval()'in ne oldu\u011funu ve neden bu kadar tehlikeli oldu\u011funu ayr\u0131nt\u0131l\u0131 olarak ele alal\u0131m. Ard\u0131ndan, g\u00fcvenli alternatiflerine ve olas\u0131 risklerini azaltma yollar\u0131na de\u011finece\u011fiz. 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Fatih Soysal olarak, bug\u00fcn JavaScript'te s\u0131kl\u0131kla kar\u015f\u0131la\u015f\u0131lan, ancak dikkatli kullan\u0131lmas\u0131 gereken bir fonksiyondan, eval() fonksiyonundan bahsedece\u011fim. \u00d6ncelikle, eval()'in ne oldu\u011funu ve neden bu kadar tehlikeli oldu\u011funu ayr\u0131nt\u0131l\u0131 olarak ele alal\u0131m. Ard\u0131ndan, g\u00fcvenli alternatiflerine ve olas\u0131 risklerini azaltma yollar\u0131na de\u011finece\u011fiz. 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