{"id":6041,"date":"2021-07-29T01:19:39","date_gmt":"2021-07-28T19:49:39","guid":{"rendered":"https:\/\/golangbyexamples.com\/?p=6041"},"modified":"2021-07-29T01:19:46","modified_gmt":"2021-07-28T19:49:46","slug":"query-params-url-golang","status":"publish","type":"post","link":"https:\/\/golangbyexamples.com\/query-params-url-golang\/","title":{"rendered":"Get or Extract Query Params from a URL in Go (Golang)"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_17 counter-hierarchy counter-decimal ez-toc-light-blue\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<nav><ul class=\"ez-toc-list ez-toc-list-level-1\"><li class=\"ez-toc-page-1 ez-toc-heading-level-1\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/golangbyexamples.com\/query-params-url-golang\/#Overview\" title=\"Overview\">Overview<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-1\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/golangbyexamples.com\/query-params-url-golang\/#Program\" title=\"Program\">Program<\/a><\/li><\/ul><\/nav><\/div>\n<h1 class=\"has-luminous-vivid-orange-color has-text-color wp-block-heading\"><span class=\"ez-toc-section\" id=\"Overview\"><\/span><strong>Overview<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<p class=\"has-medium-font-size\">Query function of the URL instance can be used to get the query params present in a URL<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><a href=\"https:\/\/pkg.go.dev\/net\/url#URL.Query\">https:\/\/pkg.go.dev\/net\/url#URL.Query<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size\">Note that query param is represented as below in Golang<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><a href=\"https:\/\/pkg.go.dev\/net\/url#Values\">https:\/\/pkg.go.dev\/net\/url#Values<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size\">which is<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">map[string][]string<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\">which actually means a particular query param key value can have one or multiple values.<\/p>\n\n\n\n<p class=\"has-medium-font-size\">Example<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">http:\/\/localhost:8080\/products?filters=color&filters=price&order=asc<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\">In this URL <strong>filters<\/strong> key has two values &#8211; <strong>color<\/strong> and <strong>price <\/strong>while <strong>order<\/strong> key has only one value <strong>asc<\/strong><\/p>\n\n\n\n<h1 class=\"has-luminous-vivid-orange-color has-text-color wp-block-heading\"><span class=\"ez-toc-section\" id=\"Program\"><\/span><strong>Program<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<p class=\"has-medium-font-size\">Let&#8217;s see a working example<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">package main\n\nimport (\n\t\"fmt\"\n\t\"log\"\n\t\"net\/url\"\n)\n\nfunc main() {\n\tinput_url := \"http:\/\/localhost:8080\/products?filters=color&filters=price&order=asc\"\n\tu, err := url.Parse(input_url)\n\tif err != nil {\n\t\tlog.Fatal(err)\n\t}\n\n\tqueryParams := u.Query()\n\n\tfmt.Println(queryParams)\n\n\tfmt.Println(queryParams[\"filters\"])\n\n\tfmt.Println(queryParams[\"order\"])\n\n}<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Output<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">map[filters:[color price] order:[asc]]\n[color price]\n[asc]<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Note: <\/strong>Check out our Golang Advanced Tutorial. The tutorials in this series are elaborative and we have tried to cover all concepts with examples. This tutorial is for those who are looking to gain expertise and a solid understanding of golang &#8211; <a href=\"https:\/\/golangbyexamples.com\/golang-comprehensive-tutorial\/\">Golang Advance Tutorial<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size\">Also if you are interested in understanding how all design patterns can be implemented in Golang. If yes, then this post is for you &#8211;<a href=\"https:\/\/golangbyexamples.com\/all-design-patterns-golang\/\">All Design Patterns Golang<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Table of Contents OverviewProgram Overview Query function of the URL instance can be used to get the query params present in a URL https:\/\/pkg.go.dev\/net\/url#URL.Query Note that query param is represented as below&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false},"categories":[1],"tags":[3,4],"class_list":["post-6041","post","type-post","status-publish","format-standard","hentry","category-tech","tag-go","tag-golang"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Get or Extract Query Params from a URL in Go (Golang) - 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