{"id":12356,"date":"2022-09-30T13:18:17","date_gmt":"2022-09-30T07:48:17","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-why-do-i-get-the-error-no-access-control-allow-origin-header-present-on-the-requested-resource-although-i-specified-the-necessary-header-duplicate\/"},"modified":"2022-09-30T13:18:17","modified_gmt":"2022-09-30T07:48:17","slug":"solved-why-do-i-get-the-error-no-access-control-allow-origin-header-present-on-the-requested-resource-although-i-specified-the-necessary-header-duplicate","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-why-do-i-get-the-error-no-access-control-allow-origin-header-present-on-the-requested-resource-although-i-specified-the-necessary-header-duplicate\/","title":{"rendered":"[Solved] Why do I get the ERROR: &#8220;No &#8216;Access-Control-Allow-Origin&#8217; header present on the requested resource&#8221; although I specified the necessary header? [duplicate]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-48647154\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"48647154\" data-parentid=\"48645724\" data-score=\"0\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>It&#8217;s been a long time since I used node, but just looking at the code, I think you need to remove the headers in your client request.<\/p>\n<p>Then make sure that these are added in your server response:<\/p>\n<pre><code>Access-Control-Allow-Origin: https:\/\/example.com\nAccess-Control-Allow-Credentials: true\n<\/code><\/pre>\n<p>Check if the cors package in node does not already does this.<\/p>\n<p>You send the header on the \/ &lt;- endpoint but you call a \/endpoint in your client. That last route probably does not set any access control headers headers.<\/p>\n<p>To debug:<br \/>\nCheck your developer console -&gt; network to see what URLs are being accessed and what the response headers are. There you should see these access-control headers.<\/p>\n<p>If you don&#8217;t see them there, it means something is not working on your server-side.<\/p>\n<p>Here are some good examples on this:<br \/>\n<a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/github.com\/expressjs\/cors\">https:\/\/github.com\/expressjs\/cors<\/a><\/p>\n<p>And just to be sure: make sure you are calling the API from <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/example.com\">https:\/\/example.com<\/a> because <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.example.com\">https:\/\/www.example.com<\/a> will <\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">1<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Why do I get the ERROR: &#8220;No &#8216;Access-Control-Allow-Origin&#8217; header present on the requested resource&#8221; although I specified the necessary header? [duplicate] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] It&#8217;s been a long time since I used node, but just looking at the code, I think you need to remove the headers in your client request. Then make sure that these are added in your server response: Access-Control-Allow-Origin: https:\/\/example.com Access-Control-Allow-Credentials: true Check if the cors package in node does not already does this. &#8230; <a title=\"[Solved] Why do I get the ERROR: &#8220;No &#8216;Access-Control-Allow-Origin&#8217; header present on the requested resource&#8221; although I specified the necessary header? [duplicate]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-why-do-i-get-the-error-no-access-control-allow-origin-header-present-on-the-requested-resource-although-i-specified-the-necessary-header-duplicate\/\" aria-label=\"More on [Solved] Why do I get the ERROR: &#8220;No &#8216;Access-Control-Allow-Origin&#8217; header present on the requested resource&#8221; although I specified the necessary header? [duplicate]\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[334,333,902],"class_list":["post-12356","post","type-post","status-publish","format-standard","hentry","category-solved","tag-ajax","tag-javascript","tag-node-js"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Why do I get the ERROR: &quot;No &#039;Access-Control-Allow-Origin&#039; header present on the requested resource&quot; although I specified the necessary header? 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