{"id":4349,"date":"2022-05-16T12:33:08","date_gmt":"2022-05-16T12:33:08","guid":{"rendered":"https:\/\/www.wikitechy.com\/interview-questions\/?p=4349"},"modified":"2022-05-16T13:42:43","modified_gmt":"2022-05-16T13:42:43","slug":"what-is-cors","status":"publish","type":"post","link":"https:\/\/www.wikitechy.com\/interview-questions\/web-designing\/what-is-cors\/","title":{"rendered":"What is Cors ?"},"content":{"rendered":"<ul>\n<li style=\"text-align: justify;\">CORS- Cross-Origin Resource Sharing.<\/li>\n<li style=\"text-align: justify;\">It is header-based mechanism that allows a server to indicate any origins like scheme, domain, or port other than its own from which a browser should permit loading resources.<\/li>\n<li style=\"text-align: justify;\">In order to check that the server will permit the actual request, CORS also relies on a mechanism by which browsers make a \u201cpreflight\u201d request to the server hosting the cross-origin resource.<\/li>\n<li style=\"text-align: justify;\">The browser sends headers that indicate the HTTP method and headers that will be used in the actual request in Preflight.<\/li>\n<li style=\"text-align: justify;\">Browsers restrict cross-origin HTTP requests initiated from scripts for security purposes.<\/li>\n<li style=\"text-align: justify;\">A web application using those APIs can only request resources from the same origin the application was loaded from unless the response from other origins includes the right CORS headers.<\/li>\n<li style=\"text-align: justify;\">Data transfers between browsers and servers and CORS mechanism supports secure cross-origin requests.<\/li>\n<li style=\"text-align: justify;\">This article is for\u00a0front-end developers, web administrators and server developers.<\/li>\n<\/ul>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-4350 aligncenter\" src=\"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/05\/what-is-cors.png\" alt=\"\" width=\"1439\" height=\"1172\" srcset=\"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/05\/what-is-cors.png 1439w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/05\/what-is-cors-300x244.png 300w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/05\/what-is-cors-1024x834.png 1024w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/05\/what-is-cors-768x626.png 768w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/05\/what-is-cors-390x318.png 390w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/05\/what-is-cors-820x668.png 820w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/05\/what-is-cors-1180x961.png 1180w\" sizes=\"(max-width: 1439px) 100vw, 1439px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>CORS- Cross-Origin Resource Sharing. It is header-based mechanism that allows a server to indicate any origins like scheme, domain, or port other than its own from which a browser should permit loading resources. In order to check that the server will permit the actual request, CORS also relies on a mechanism by which browsers make [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17079],"tags":[17315,17318,17319,17317,17328,17314,17326,17320,17316,17324,17322,17323,17313,17321,17327,17325],"class_list":["post-4349","post","type-post","status-publish","format-standard","hentry","category-web-designing","tag-cors-example","tag-cors-npm","tag-cors-policy","tag-cors-vulnerability","tag-is-cors-necessary","tag-what-is-cors","tag-what-is-cors-and-how-does-it-work","tag-what-is-cors-in-aws","tag-what-is-cors-in-web-api","tag-what-is-the-purpose-of-cors","tag-what-is-the-use-of-cors","tag-what-is-the-use-of-cors-filter","tag-what-is-the-use-of-cors-in-node-js","tag-what-is-the-use-of-cors-in-web-api","tag-why-cors-is-important","tag-why-is-cors-important"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is Cors ? - Cross-Origin Resource Sharing (CORS) - Web Designing<\/title>\n<meta name=\"description\" content=\"What is Cors ? - It is header-based mechanism that allows a server to indicate any origins like scheme, domain, or port other than its own from which a browser should permit loading resources.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wikitechy.com\/interview-questions\/web-designing\/what-is-cors\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Cors ? - Cross-Origin Resource Sharing (CORS) - Web Designing\" \/>\n<meta property=\"og:description\" content=\"What is Cors ? - It is header-based mechanism that allows a server to indicate any origins like scheme, domain, or port other than its own from which a browser should permit loading resources.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wikitechy.com\/interview-questions\/web-designing\/what-is-cors\/\" \/>\n<meta property=\"og:site_name\" content=\"Wikitechy\" \/>\n<meta property=\"article:published_time\" content=\"2022-05-16T12:33:08+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-05-16T13:42:43+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/05\/what-is-cors.png\" \/>\n<meta name=\"author\" content=\"webmaster\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"webmaster\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/web-designing\\\/what-is-cors\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/web-designing\\\/what-is-cors\\\/\"},\"author\":{\"name\":\"webmaster\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/#\\\/schema\\\/person\\\/f785ba3ecc599133e65ab6138042a3e4\"},\"headline\":\"What is Cors ?\",\"datePublished\":\"2022-05-16T12:33:08+00:00\",\"dateModified\":\"2022-05-16T13:42:43+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/web-designing\\\/what-is-cors\\\/\"},\"wordCount\":154,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/web-designing\\\/what-is-cors\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/wp-content\\\/uploads\\\/2022\\\/05\\\/what-is-cors.png\",\"keywords\":[\"cors example\",\"cors npm\",\"cors policy\",\"cors vulnerability\",\"is cors necessary\",\"what is cors\",\"what is cors and how does it work\",\"what is cors in aws\",\"what is cors in web api\",\"what is the purpose of cors\",\"what is the use of cors\",\"what is the use of cors filter\",\"what is the use of cors in node js\",\"what is the use of cors in web api\",\"why cors is important\",\"why is cors important\"],\"articleSection\":[\"Web Designing\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/web-designing\\\/what-is-cors\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/web-designing\\\/what-is-cors\\\/\",\"url\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/web-designing\\\/what-is-cors\\\/\",\"name\":\"What is Cors ? - Cross-Origin Resource Sharing (CORS) - Web Designing\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/web-designing\\\/what-is-cors\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/web-designing\\\/what-is-cors\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/wp-content\\\/uploads\\\/2022\\\/05\\\/what-is-cors.png\",\"datePublished\":\"2022-05-16T12:33:08+00:00\",\"dateModified\":\"2022-05-16T13:42:43+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/#\\\/schema\\\/person\\\/f785ba3ecc599133e65ab6138042a3e4\"},\"description\":\"What is Cors ? - It is header-based mechanism that allows a server to indicate any origins like scheme, domain, or port other than its own from which a browser should permit loading resources.\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/web-designing\\\/what-is-cors\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/web-designing\\\/what-is-cors\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/wp-content\\\/uploads\\\/2022\\\/05\\\/what-is-cors.png\",\"contentUrl\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/wp-content\\\/uploads\\\/2022\\\/05\\\/what-is-cors.png\",\"width\":1439,\"height\":1172},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/#website\",\"url\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/\",\"name\":\"Wikitechy\",\"description\":\"Interview Questions\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/#\\\/schema\\\/person\\\/f785ba3ecc599133e65ab6138042a3e4\",\"name\":\"webmaster\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g\",\"caption\":\"webmaster\"},\"sameAs\":[\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\"],\"url\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/author\\\/webmaster\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"What is Cors ? - Cross-Origin Resource Sharing (CORS) - Web Designing","description":"What is Cors ? - It is header-based mechanism that allows a server to indicate any origins like scheme, domain, or port other than its own from which a browser should permit loading resources.","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:\/\/www.wikitechy.com\/interview-questions\/web-designing\/what-is-cors\/","og_locale":"en_US","og_type":"article","og_title":"What is Cors ? - Cross-Origin Resource Sharing (CORS) - Web Designing","og_description":"What is Cors ? - It is header-based mechanism that allows a server to indicate any origins like scheme, domain, or port other than its own from which a browser should permit loading resources.","og_url":"https:\/\/www.wikitechy.com\/interview-questions\/web-designing\/what-is-cors\/","og_site_name":"Wikitechy","article_published_time":"2022-05-16T12:33:08+00:00","article_modified_time":"2022-05-16T13:42:43+00:00","og_image":[{"url":"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/05\/what-is-cors.png","type":"","width":"","height":""}],"author":"webmaster","twitter_card":"summary_large_image","twitter_misc":{"Written by":"webmaster","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.wikitechy.com\/interview-questions\/web-designing\/what-is-cors\/#article","isPartOf":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/web-designing\/what-is-cors\/"},"author":{"name":"webmaster","@id":"https:\/\/www.wikitechy.com\/interview-questions\/#\/schema\/person\/f785ba3ecc599133e65ab6138042a3e4"},"headline":"What is Cors ?","datePublished":"2022-05-16T12:33:08+00:00","dateModified":"2022-05-16T13:42:43+00:00","mainEntityOfPage":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/web-designing\/what-is-cors\/"},"wordCount":154,"commentCount":0,"image":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/web-designing\/what-is-cors\/#primaryimage"},"thumbnailUrl":"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/05\/what-is-cors.png","keywords":["cors example","cors npm","cors policy","cors vulnerability","is cors necessary","what is cors","what is cors and how does it work","what is cors in aws","what is cors in web api","what is the purpose of cors","what is the use of cors","what is the use of cors filter","what is the use of cors in node js","what is the use of cors in web api","why cors is important","why is cors important"],"articleSection":["Web Designing"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.wikitechy.com\/interview-questions\/web-designing\/what-is-cors\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.wikitechy.com\/interview-questions\/web-designing\/what-is-cors\/","url":"https:\/\/www.wikitechy.com\/interview-questions\/web-designing\/what-is-cors\/","name":"What is Cors ? - Cross-Origin Resource Sharing (CORS) - Web Designing","isPartOf":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/web-designing\/what-is-cors\/#primaryimage"},"image":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/web-designing\/what-is-cors\/#primaryimage"},"thumbnailUrl":"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/05\/what-is-cors.png","datePublished":"2022-05-16T12:33:08+00:00","dateModified":"2022-05-16T13:42:43+00:00","author":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/#\/schema\/person\/f785ba3ecc599133e65ab6138042a3e4"},"description":"What is Cors ? - It is header-based mechanism that allows a server to indicate any origins like scheme, domain, or port other than its own from which a browser should permit loading resources.","inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wikitechy.com\/interview-questions\/web-designing\/what-is-cors\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.wikitechy.com\/interview-questions\/web-designing\/what-is-cors\/#primaryimage","url":"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/05\/what-is-cors.png","contentUrl":"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/05\/what-is-cors.png","width":1439,"height":1172},{"@type":"WebSite","@id":"https:\/\/www.wikitechy.com\/interview-questions\/#website","url":"https:\/\/www.wikitechy.com\/interview-questions\/","name":"Wikitechy","description":"Interview Questions","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wikitechy.com\/interview-questions\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.wikitechy.com\/interview-questions\/#\/schema\/person\/f785ba3ecc599133e65ab6138042a3e4","name":"webmaster","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g","caption":"webmaster"},"sameAs":["https:\/\/www.wikitechy.com\/interview-questions"],"url":"https:\/\/www.wikitechy.com\/interview-questions\/author\/webmaster\/"}]}},"_links":{"self":[{"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/posts\/4349","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/comments?post=4349"}],"version-history":[{"count":1,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/posts\/4349\/revisions"}],"predecessor-version":[{"id":4351,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/posts\/4349\/revisions\/4351"}],"wp:attachment":[{"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/media?parent=4349"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/categories?post=4349"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/tags?post=4349"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}