Fixes #3541

packages/less/src/less-node/url-file-manager.js

@@ -21,24 +21,21 @@ class UrlFileManager extends AbstractFileManager {
             }
 
             let urlStr = isUrlRe.test( filename ) ? filename : url.resolve(currentDirectory, filename);
-            const urlObj = url.parse(urlStr);
+
+            /** native-request currently has a bug */
+            const hackUrlStr = urlStr.indexOf('?') === -1 ? urlStr + '?' : urlStr
 
-            if (!urlObj.protocol) {
-                urlObj.protocol = 'http';
-                urlStr = urlObj.format();
-            }
-
-            request.get({uri: urlStr, strictSSL: !options.insecure }, (error, res, body) => {
-                if (error) {
-                    reject({ type: 'File', message: `resource '${urlStr}' gave this Error:\n  ${error}\n` });
+            request.get(hackUrlStr, (error, body, status) => {
+                if (status === 404) {
+                    reject({ type: 'File', message: `resource '${urlStr}' was not found\n` });
                     return;
                 }
-                if (res && res.statusCode === 404) {
-                    reject({ type: 'File', message: `resource '${urlStr}' was not found\n` });
+                if (error) {
+                    reject({ type: 'File', message: `resource '${urlStr}' gave this Error:\n  ${error}\n` });
                     return;
                 }
                 if (!body) {
-                    logger.warn(`Warning: Empty body (HTTP ${res.statusCode}) returned by "${urlStr}"`);
+                    logger.warn(`Warning: Empty body (HTTP ${status}) returned by "${urlStr}"`);
                 }
                 fulfill({ contents: body, filename: urlStr });
             });

packages/test-data/css/_main/import-remote.css

@@ -0,0 +1,3 @@
+.test {
+  color: blue;
+}

packages/test-data/less/_main/import-remote.less

@@ -0,0 +1,8 @@
+// https://github.com/less/less.js/issues/3541
+@import (reference) url(https://cdn.jsdelivr.net/npm/@less/test-data/less/_main/selectors.less);
+@import (reference) url("https://cdn.jsdelivr.net/npm/@less/test-data/less/_main/scope.less");
+@import (reference) url("https://cdn.jsdelivr.net/npm/@less/test-data/less/_main/empty.less?arg");
+
+.test {
+  color: @x;
+}