Move matrix-cypher into matrix.to

src/matrix-cypher/utils/fetch.ts

@@ -0,0 +1,36 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+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 fetch from 'cross-fetch';
+
+import { ensure } from './promises';
+
+/*
+ * Wraps a fetch with a domain for easy reuse.
+ */
+export function prefixFetch(host: string) {
+    return (path: string) => fetch(
+        new URL(path, host).toString(),
+    );
+}
+
+export function parseJSON(resp: Response) {
+    return ensure(
+        resp.ok,
+        () => resp.json(),
+        `Error from Homeserver. Error code: ${resp.status}`,
+    );
+}