backend-app-api: lift in url utils from backend-common

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/backend-app-api/src/config/config.ts

@@ -27,8 +27,8 @@ import {
 } from '@backstage/config-loader';
 import { AppConfig, Config, ConfigReader } from '@backstage/config';
 import { getPackages } from '@manypkg/get-packages';
-
-import { isValidUrl } from './urls';
+import { ObservableConfigProxy } from './ObservableConfigProxy';
+import { isValidUrl } from '../lib/urls';
 
 import { setRootLoggerRedactionList } from './logging/rootLogger';
 

packages/backend-app-api/src/lib/urls.test.ts

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2021 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { isValidUrl } from './urls';
+
+describe('isValidUrl', () => {
+  it('should return true for url', () => {
+    const validUrl = isValidUrl('http://some.valid.url');
+    expect(validUrl).toBe(true);
+  });
+
+  it('should return false for absolute path', () => {
+    const validUrl = isValidUrl('/some/absolute/path');
+    expect(validUrl).toBe(false);
+  });
+
+  it('should return false for relative path', () => {
+    const validUrl = isValidUrl('../some/relative/path');
+    expect(validUrl).toBe(false);
+  });
+});

packages/backend-app-api/src/lib/urls.ts

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2021 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export function isValidUrl(url: string): boolean {
+  try {
+    // eslint-disable-next-line no-new
+    new URL(url);
+    return true;
+  } catch {
+    return false;
+  }
+}