1 files changed, 75 insertions, 0 deletions
diff --git a/javascript/videojs/src/js/utils/url.js b/javascript/videojs/src/js/utils/url.js
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+++ b/javascript/videojs/src/js/utils/url.js
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+/**
+ * @file url.js
+ * @module url
+ */
+import document from 'global/document';
+import window from 'global/window';
+
+/**
+ * Resolve and parse the elements of a URL.
+ *
+ * @function
+ * @param    {string} url
+ *           The url to parse
+ *
+ * @return   {URL}
+ *           An object of url details
+ */
+export const parseUrl = function(url) {
+  return new URL(url, document.baseURI);
+};
+
+/**
+ * Get absolute version of relative URL.
+ *
+ * @function
+ * @param    {string} url
+ *           URL to make absolute
+ *
+ * @return   {string}
+ *           Absolute URL
+ */
+export const getAbsoluteURL = function(url) {
+  return (new URL(url, document.baseURI)).href;
+};
+
+/**
+ * Returns the extension of the passed file name. It will return an empty string
+ * if passed an invalid path.
+ *
+ * @function
+ * @param    {string} path
+ *           The fileName path like '/path/to/file.mp4'
+ *
+ * @return  {string}
+ *           The extension in lower case or an empty string if no
+ *           extension could be found.
+ */
+export const getFileExtension = function(path) {
+  if (typeof path === 'string') {
+    const cleanPath = path.split('?')[0].replace(/\/+$/, '');
+
+    const match = cleanPath.match(/\.([^.\/]+)$/);
+
+    return match ? match[1].toLowerCase() : '';
+  }
+  return '';
+};
+
+/**
+ * Returns whether the url passed is a cross domain request or not.
+ *
+ * @function
+ * @param    {string} url
+ *           The url to check.
+ *
+ * @param    {URL} [winLoc]
+ *           the domain to check the url against, defaults to window.location
+ *
+ * @return   {boolean}
+ *           Whether it is a cross domain request or not.
+ */
+export const isCrossOrigin = function(url, winLoc = window.location) {
+  return parseUrl(url).origin !== winLoc.origin;
+};
+