Modules

node_modules/@firebase/installations/src/api/common.ts

@@ -0,0 +1,111 @@
+/**
+ * @license
+ * Copyright 2019 Google Inc.
+ *
+ * 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 { FirebaseError } from '@firebase/util';
+import { GenerateAuthTokenResponse } from '../interfaces/api-response';
+import { AppConfig } from '../interfaces/app-config';
+import {
+  CompletedAuthToken,
+  RegisteredInstallationEntry,
+  RequestStatus
+} from '../interfaces/installation-entry';
+import {
+  INSTALLATIONS_API_URL,
+  INTERNAL_AUTH_VERSION
+} from '../util/constants';
+import { ERROR_FACTORY, ErrorCode } from '../util/errors';
+
+export function getInstallationsEndpoint({ projectId }: AppConfig): string {
+  return `${INSTALLATIONS_API_URL}/projects/${projectId}/installations`;
+}
+
+export function extractAuthTokenInfoFromResponse(
+  response: GenerateAuthTokenResponse
+): CompletedAuthToken {
+  return {
+    token: response.token,
+    requestStatus: RequestStatus.COMPLETED,
+    expiresIn: getExpiresInFromResponseExpiresIn(response.expiresIn),
+    creationTime: Date.now()
+  };
+}
+
+export async function getErrorFromResponse(
+  requestName: string,
+  response: Response
+): Promise<FirebaseError> {
+  const responseJson: ErrorResponse = await response.json();
+  const errorData = responseJson.error;
+  return ERROR_FACTORY.create(ErrorCode.REQUEST_FAILED, {
+    requestName,
+    serverCode: errorData.code,
+    serverMessage: errorData.message,
+    serverStatus: errorData.status
+  });
+}
+
+export function getHeaders({ apiKey }: AppConfig): Headers {
+  return new Headers({
+    'Content-Type': 'application/json',
+    Accept: 'application/json',
+    'x-goog-api-key': apiKey
+  });
+}
+
+export function getHeadersWithAuth(
+  appConfig: AppConfig,
+  { refreshToken }: RegisteredInstallationEntry
+): Headers {
+  const headers = getHeaders(appConfig);
+  headers.append('Authorization', getAuthorizationHeader(refreshToken));
+  return headers;
+}
+
+export interface ErrorResponse {
+  error: {
+    code: number;
+    message: string;
+    status: string;
+  };
+}
+
+/**
+ * Calls the passed in fetch wrapper and returns the response.
+ * If the returned response has a status of 5xx, re-runs the function once and
+ * returns the response.
+ */
+export async function retryIfServerError(
+  fn: () => Promise<Response>
+): Promise<Response> {
+  const result = await fn();
+
+  if (result.status >= 500 && result.status < 600) {
+    // Internal Server Error. Retry request.
+    return fn();
+  }
+
+  return result;
+}
+
+function getExpiresInFromResponseExpiresIn(responseExpiresIn: string): number {
+  // This works because the server will never respond with fractions of a second.
+  return Number(responseExpiresIn.replace('s', '000'));
+}
+
+function getAuthorizationHeader(refreshToken: string): string {
+  return `${INTERNAL_AUTH_VERSION} ${refreshToken}`;
+}