feat: add retry config customization in app init

Author: thiagomorales

etc/firebase-admin.api.md

@@ -72,8 +72,10 @@ export interface AppOptions {
     credential?: Credential;
     databaseAuthVariableOverride?: object | null;
     databaseURL?: string;
+    disableRetry?: boolean;
     httpAgent?: Agent;
     projectId?: string;
+    retryConfig?: RetryConfig;
     serviceAccountId?: string;
     storageBucket?: string;
 }
@@ -470,6 +472,15 @@ export namespace remoteConfig {
     export type Version = Version;
 }
 
+// @public
+export interface RetryConfig {
+    backOffFactor?: number;
+    ioErrorCodes?: string[];
+    maxDelayInMillis: number;
+    maxRetries: number;
+    statusCodes?: number[];
+}
+
 // @public (undocumented)
 export const SDK_VERSION: string;
 

etc/firebase-admin.app.api.md

@@ -22,8 +22,10 @@ export interface AppOptions {
     credential?: Credential;
     databaseAuthVariableOverride?: object | null;
     databaseURL?: string;
+    disableRetry?: boolean;
     httpAgent?: Agent;
     projectId?: string;
+    retryConfig?: RetryConfig;
     serviceAccountId?: string;
     storageBucket?: string;
 }
@@ -73,6 +75,15 @@ export function initializeApp(options?: AppOptions, appName?: string): App;
 // @public
 export function refreshToken(refreshTokenPathOrObject: string | object, httpAgent?: Agent): Credential;
 
+// @public
+export interface RetryConfig {
+    backOffFactor?: number;
+    ioErrorCodes?: string[];
+    maxDelayInMillis: number;
+    maxRetries: number;
+    statusCodes?: number[];
+}
+
 // @public (undocumented)
 export const SDK_VERSION: string;
 

src/app/core.ts

@@ -18,6 +18,7 @@
 import { Agent } from 'http';
 
 import { Credential } from './credential';
+import { RetryConfig } from '.'
 
 /**
  * Available options to pass to {@link firebase-admin.app#initializeApp}.
@@ -83,6 +84,16 @@ export interface AppOptions {
    * specifying an HTTP Agent in the corresponding factory methods.
    */
   httpAgent?: Agent;
+
+  /**
+   * The retry configuration that will be used in HttpClient for API Requests.
+   */
+  retryConfig?: RetryConfig;
+
+  /** 
+   * Completely disable the retry strategy in HttpClient. 
+  */
+  disableRetry?: boolean;
 }
 
 /**

src/app/index.ts

@@ -28,5 +28,6 @@ export { initializeApp, getApp, getApps, deleteApp } from './lifecycle';
 
 export { Credential, ServiceAccount, GoogleOAuthAccessToken } from './credential';
 export { applicationDefault, cert, refreshToken } from './credential-factory';
+export { RetryConfig } from '../utils/api-request'
 
 export const SDK_VERSION = getSdkVersion();

src/auth/auth-api-request.ts

@@ -48,7 +48,7 @@ const FIREBASE_AUTH_HEADER = {
   'X-Client-Version': `Node/Admin/${utils.getSdkVersion()}`,
 };
 /** Firebase Auth request timeout duration in milliseconds. */
-const FIREBASE_AUTH_TIMEOUT = 25000;
+const FIREBASE_AUTH_TIMEOUT = parseInt(process.env.FIREBASE_AUTH_TIMEOUT || '25000', 10);
 
 
 /** List of reserved claims which cannot be provided when creating a custom token. */

src/firebase-namespace-api.ts

@@ -91,6 +91,7 @@ export { projectManagement } from './project-management/project-management-names
 export { remoteConfig } from './remote-config/remote-config-namespace';
 export { securityRules } from './security-rules/security-rules-namespace';
 export { storage } from './storage/storage-namespace';
+export { RetryConfig } from './utils/api-request'
 
 // Declare other top-level members of the admin namespace below. Unfortunately, there's no
 // compile-time mechanism to ensure that the FirebaseNamespace class actually provides these

src/messaging/batch-request-internal.ts

@@ -20,7 +20,7 @@ import {
 import { FirebaseAppError, AppErrorCodes } from '../utils/error';
 
 const PART_BOUNDARY = '__END_OF_PART__';
-const TEN_SECONDS_IN_MILLIS = 10000;
+const FIREBASE_MESSAGING_BATCH_TIMEOUT = parseInt(process.env.FIREBASE_MESSAGING_BATCH_TIMEOUT || '10000', 10);
 
 /**
  * Represents a request that can be sent as part of an HTTP batch request.
@@ -72,7 +72,7 @@ export class BatchRequestClient {
       url: this.batchUrl,
       data: this.getMultipartPayload(requests),
       headers: Object.assign({}, this.commonHeaders, requestHeaders),
-      timeout: TEN_SECONDS_IN_MILLIS,
+      timeout: FIREBASE_MESSAGING_BATCH_TIMEOUT,
     };
     return this.httpClient.send(request).then((response) => {
       if (!response.multipart) {

src/messaging/messaging-api-request-internal.ts

@@ -27,7 +27,7 @@ import { SendResponse, BatchResponse } from './messaging-api';
 
 
 // FCM backend constants
-const FIREBASE_MESSAGING_TIMEOUT = 10000;
+const FIREBASE_MESSAGING_TIMEOUT = parseInt(process.env.FIREBASE_MESSAGING_TIMEOUT || '10000', 10);
 const FIREBASE_MESSAGING_BATCH_URL = 'https://fcm.googleapis.com/batch';
 const FIREBASE_MESSAGING_HTTP_METHOD: HttpMethod = 'POST';
 const FIREBASE_MESSAGING_HEADERS = {

src/project-management/project-management-api-request-internal.ts

@@ -36,7 +36,7 @@ const PROJECT_MANAGEMENT_HEADERS = {
   'X-Client-Version': `Node/Admin/${getSdkVersion()}`,
 };
 /** Project management request timeout duration in milliseconds. */
-const PROJECT_MANAGEMENT_TIMEOUT_MILLIS = 10000;
+const FIREBASE_PROJECT_MANAGEMENT_TIMEOUT = parseInt(process.env.FIREBASE_PROJECT_MANAGEMENT_TIMEOUT || '10000', 10);
 
 const LIST_APPS_MAX_PAGE_SIZE = 100;
 
@@ -315,7 +315,7 @@ export class ProjectManagementRequestHandler {
       url: `${baseUrlToUse}${path}`,
       headers: PROJECT_MANAGEMENT_HEADERS,
       data: requestData,
-      timeout: PROJECT_MANAGEMENT_TIMEOUT_MILLIS,
+      timeout: FIREBASE_PROJECT_MANAGEMENT_TIMEOUT,
     };
 
     return this.httpClient.send(request)

src/utils/api-request.ts

@@ -243,8 +243,13 @@ function validateRetryConfig(retry: RetryConfig): void {
 
 export class HttpClient {
 
-  constructor(private readonly retry: RetryConfig | null = defaultRetryConfig()) {
-    if (this.retry) {
+  constructor(
+    private readonly retry: RetryConfig | null = null, 
+    private readonly disableRetry: boolean = false
+  ) {
+    if (!this.disableRetry && !this.retry) {
+      this.retry = defaultRetryConfig();
+    } else if (!this.disableRetry && this.retry) {
       validateRetryConfig(this.retry);
     }
   }
@@ -345,7 +350,7 @@ export class HttpClient {
   }
 
   private isRetryEligible(retryAttempts: number, err: LowLevelError): boolean {
-    if (!this.retry) {
+    if (this.disableRetry || !this.retry) {
       return false;
     }
 
@@ -811,7 +816,7 @@ class HttpRequestConfigImpl implements HttpRequestConfig {
 
 export class AuthorizedHttpClient extends HttpClient {
   constructor(private readonly app: FirebaseApp) {
-    super();
+    super(app.options.retryConfig, app.options.disableRetry);
   }
 
   public send(request: HttpRequestConfig): Promise<HttpResponse> {

test/resources/mocks.ts

@@ -54,11 +54,19 @@ export const databaseAuthVariableOverride = { 'some#string': 'some#val' };
 export const storageBucket = 'bucketName.appspot.com';
 
 export const credential = cert(path.resolve(__dirname, './mock.key.json'));
+export const retryConfig = {
+  maxRetries: 15,
+  statusCodes: [507],
+  ioErrorCodes: ['ECONNRESET', 'ETIMEDOUT'],
+  backOffFactor: 0.8,
+  maxDelayInMillis: 190000,
+}
 
 export const appOptions: AppOptions = {
   credential,
   databaseURL,
   storageBucket,
+  retryConfig,
 };
 
 export const appOptionsWithOverride: AppOptions = {
@@ -67,19 +75,23 @@ export const appOptionsWithOverride: AppOptions = {
   databaseURL,
   storageBucket,
   projectId,
+  retryConfig,
 };
 
 export const appOptionsNoAuth: AppOptions = {
   databaseURL,
+  retryConfig,
 };
 
 export const appOptionsNoDatabaseUrl: AppOptions = {
   credential,
+  retryConfig,
 };
 
 export const appOptionsAuthDB: AppOptions = {
   credential,
   databaseURL,
+  retryConfig,
 };
 
 export class MockCredential implements Credential {

test/unit/utils/api-request.spec.ts

@@ -786,9 +786,35 @@ describe('HttpClient', () => {
     });
   });
 
-  it('should not retry when RetryConfig is explicitly null', () => {
+  it('should succeed, with custom retry config after 1 retry, on a single internal server error response', () => {
+    mockedRequests.push(mockRequestWithHttpError(500));
+    const customRetryConfig = {
+      maxRetries: 4,
+      statusCodes: [500],
+      ioErrorCodes: [],
+      backOffFactor: 0.5,
+      maxDelayInMillis: 60 * 1000,
+    };
+    const respData = { foo: 'bar' };
+    const scope = nock('https://' + mockHost)
+      .get(mockPath)
+      .reply(200, respData, {
+        'content-type': 'application/json',
+      });
+    mockedRequests.push(scope);
+    const client = new HttpClient(customRetryConfig);
+    return client.send({
+      method: 'GET',
+      url: mockUrl,
+    }).then((resp) => {
+      expect(resp.status).to.equal(200);
+      expect(resp.data).to.deep.equal(respData);
+    });
+  });
+
+  it('should not retry when retry is explicitly disabled', () => {
     mockedRequests.push(mockRequestWithError({ message: 'connection reset 1', code: 'ECONNRESET' }));
-    const client = new HttpClient(null);
+    const client = new HttpClient(null, true);
     const err = 'Error while making request: connection reset 1';
     return client.send({
       method: 'GET',