{"id":6025,"date":"2021-07-23T13:21:51","date_gmt":"2021-07-23T07:51:51","guid":{"rendered":"https:\/\/golangbyexamples.com\/?p=6025"},"modified":"2021-07-23T13:21:58","modified_gmt":"2021-07-23T07:51:58","slug":"extract-url-golang","status":"publish","type":"post","link":"https:\/\/golangbyexamples.com\/extract-url-golang\/","title":{"rendered":"Extract a URL from a string 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\/extract-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\/extract-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\">Below go package can be used to extract URL from a given string<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><a href=\"https:\/\/github.com\/mvdan\/xurls\">https:\/\/github.com\/mvdan\/xurls<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size\">There are two ways of using this package<\/p>\n\n\n\n<ul class=\"has-medium-font-size wp-block-list\"><li><strong>Strict<\/strong> &#8211; In strict mode, it matches only URLs with a scheme<\/li><\/ul>\n\n\n\n<ul class=\"has-medium-font-size wp-block-list\"><li><strong>Relaxed<\/strong> &#8211; In relaxed mode, it matches any URL matched by strict plus any URLs without a scheme<\/li><\/ul>\n\n\n\n<p class=\"has-medium-font-size\">You can specify the scheme to filter on. There is a function for that<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>StrictMatchingScheme<\/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 first see a program<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">package main\n\nimport (\n\t\"fmt\"\n\n\t\"mvdan.cc\/xurls\/v2\"\n)\n\nfunc main() {\n\txurlsStrict := xurls.Strict()\n\toutput := xurlsStrict.FindAllString(\"golangbyexamples.com is https:\/\/golangbyexamples.com\", -1)\n\tfmt.Println(output)\n\n\txurlsRelaxed := xurls.Relaxed()\n\toutput = xurlsRelaxed.FindAllString(\"The website is golangbyexamples.com\", -1)\n\tfmt.Println(output)\n\n\toutput = xurlsRelaxed.FindAllString(\"golangbyexamples.com is https:\/\/golangbyexamples.com\", -1)\n\tfmt.Println(output)\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\">[https:\/\/golangbyexamples.com]\n[golangbyexamples.com]\n[golangbyexamples.com https:\/\/golangbyexamples.com]<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\">Notice in the strict mode, it does not return the <a href=\"http:\/\/golangbyexamples.com\">golangbyexamples.com<\/a> in the output as that is without a scheme.<\/p>\n\n\n\n<p class=\"has-medium-font-size\">Let&#8217;s see another program to extract multiple URLs<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-\">package main\n\nimport (\n\t\"fmt\"\n\n\t\"mvdan.cc\/xurls\/v2\"\n)\n\nfunc main() {\n\txurlsStrict := xurls.Strict()\n\tinput := \"The webiste is https:\/\/golangbyexamples.com:8000\/tutorials\/intro amd mail to mailto:contactus@golangbyexamples.com\"\n\toutput := xurlsStrict.FindAllString(input, -1)\n\tfmt.Println(output)\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\">[https:\/\/golangbyexamples.com:8000\/tutorials\/intro mailto:contactus@golangbyexamples.com]<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\">If we want to restrict the output to a particular scheme then that also can be done.<\/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\n\t\"mvdan.cc\/xurls\/v2\"\n)\n\nfunc main() {\n\txurlsStrict, err := xurls.StrictMatchingScheme(\"https\")\n\tif err != nil {\n\t\tlog.Fatalf(\"Some error occured. Error: %s\", err)\n\t}\n\tinput := \"The webiste is https:\/\/golangbyexamples.com:8000\/tutorials\/intro amd mail to mailto:contactus@golangbyexamples.com\"\n\toutput := xurlsStrict.FindAllString(input, -1)\n\tfmt.Println(output)\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\">[https:\/\/golangbyexamples.com:8000\/tutorials\/intro]<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\">In the above program, we provided the scheme as https which is why we have only one output<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Table of Contents OverviewProgram Overview Below go package can be used to extract URL from a given string https:\/\/github.com\/mvdan\/xurls There are two ways of using this package Strict &#8211; In strict mode,&#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-6025","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>Extract a URL from a string in Go (Golang) - Welcome To Golang By Example<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/golangbyexamples.com\/extract-url-golang\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Extract a URL from a string in Go (Golang) - Welcome To Golang By Example\" \/>\n<meta property=\"og:description\" content=\"Table of Contents OverviewProgram Overview Below go package can be used to extract URL from a given string https:\/\/github.com\/mvdan\/xurls There are two ways of using this package Strict &#8211; 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