Fix 429 errors on OVSX requests

dev-packages/cli/src/download-plugins.ts

@@ -55,8 +55,6 @@ export interface DownloadPluginsOptions {
      * Fetch plugins in parallel
      */
     parallel?: boolean;
-
-    rateLimit?: number;
 }
 
 interface PluginDownload {
@@ -65,16 +63,19 @@ interface PluginDownload {
     version?: string | undefined
 }
 
-export default async function downloadPlugins(ovsxClient: OVSXClient, requestService: RequestService, options: DownloadPluginsOptions = {}): Promise<void> {
+export default async function downloadPlugins(
+    ovsxClient: OVSXClient,
+    rateLimiter: RateLimiter,
+    requestService: RequestService,
+    options: DownloadPluginsOptions = {}
+): Promise<void> {
     const {
         packed = false,
         ignoreErrors = false,
         apiVersion = DEFAULT_SUPPORTED_API_VERSION,
-        rateLimit = 15,
         parallel = true
     } = options;
 
-    const rateLimiter = new RateLimiter({ tokensPerInterval: rateLimit, interval: 'second' });
     const apiFilter = new OVSXApiFilterImpl(ovsxClient, apiVersion);
 
     // Collect the list of failures to be appended at the end of the script.

dev-packages/cli/src/theia.ts

@@ -24,9 +24,10 @@ import { ApplicationProps, DEFAULT_SUPPORTED_API_VERSION } from '@theia/applicat
 import checkDependencies from './check-dependencies';
 import downloadPlugins from './download-plugins';
 import runTest from './run-test';
+import { RateLimiter } from 'limiter';
 import { LocalizationManager, extract } from '@theia/localization-manager';
 import { NodeRequestService } from '@theia/request/lib/node-request-service';
-import { ExtensionIdMatchesFilterFactory, OVSXClient, OVSXHttpClient, OVSXRouterClient, RequestContainsFilterFactory } from '@theia/ovsx-client';
+import { ExtensionIdMatchesFilterFactory, OVSX_RATE_LIMIT, OVSXClient, OVSXHttpClient, OVSXRouterClient, RequestContainsFilterFactory } from '@theia/ovsx-client';
 
 const { executablePath } = require('puppeteer');
 
@@ -389,7 +390,7 @@ async function theiaCli(): Promise<void> {
                 'rate-limit': {
                     describe: 'Amount of maximum open-vsx requests per second',
                     number: true,
-                    default: 15
+                    default: OVSX_RATE_LIMIT
                 },
                 'proxy-url': {
                     describe: 'Proxy URL'
@@ -415,22 +416,23 @@ async function theiaCli(): Promise<void> {
                     strictSSL: strictSsl
                 });
                 let client: OVSXClient | undefined;
+                const rateLimiter = new RateLimiter({ tokensPerInterval: options.rateLimit, interval: 'second' });
                 if (ovsxRouterConfig) {
                     const routerConfig = await fs.promises.readFile(ovsxRouterConfig, 'utf8').then(JSON.parse, error => {
                         console.error(error);
                     });
                     if (routerConfig) {
                         client = await OVSXRouterClient.FromConfig(
                             routerConfig,
-                            OVSXHttpClient.createClientFactory(requestService),
+                            OVSXHttpClient.createClientFactory(requestService, rateLimiter),
                             [RequestContainsFilterFactory, ExtensionIdMatchesFilterFactory]
                         );
                     }
                 }
                 if (!client) {
-                    client = new OVSXHttpClient(apiUrl, requestService);
+                    client = new OVSXHttpClient(apiUrl, requestService, rateLimiter);
                 }
-                await downloadPlugins(client, requestService, options);
+                await downloadPlugins(client, rateLimiter, requestService, options);
             },
         })
         .command<{

dev-packages/ovsx-client/package.json

@@ -30,6 +30,7 @@
   },
   "dependencies": {
     "@theia/request": "1.52.0",
+    "limiter": "^2.1.0",
     "semver": "^7.5.4",
     "tslib": "^2.6.2"
   }

dev-packages/ovsx-client/src/index.ts

@@ -15,7 +15,7 @@
 // *****************************************************************************
 
 export { OVSXApiFilter, OVSXApiFilterImpl, OVSXApiFilterProvider } from './ovsx-api-filter';
-export { OVSXHttpClient } from './ovsx-http-client';
+export { OVSXHttpClient, OVSX_RATE_LIMIT } from './ovsx-http-client';
 export { OVSXMockClient } from './ovsx-mock-client';
 export { OVSXRouterClient, OVSXRouterConfig, OVSXRouterFilterFactory as FilterFactory } from './ovsx-router-client';
 export * from './ovsx-router-filters';

dev-packages/ovsx-client/src/ovsx-api-filter.ts

@@ -67,12 +67,13 @@ export class OVSXApiFilterImpl implements OVSXApiFilter {
 
     protected async queryLatestCompatibleExtension(query: VSXQueryOptions): Promise<VSXExtensionRaw | undefined> {
         let offset = 0;
+        let size = 5;
         let loop = true;
         while (loop) {
             const queryOptions: VSXQueryOptions = {
                 ...query,
                 offset,
-                size: 5 // there is a great chance that the newest version will work
+                size // there is a great chance that the newest version will work
             };
             const results = await this.client.query(queryOptions);
             const compatibleExtension = this.getLatestCompatibleExtension(results.extensions);
@@ -83,6 +84,8 @@ export class OVSXApiFilterImpl implements OVSXApiFilter {
             offset += results.extensions.length;
             // Continue querying if there are more extensions available
             loop = results.totalSize > offset;
+            // Adjust the size to fetch more extensions next time
+            size = Math.min(size * 2, 100);
         }
         return undefined;
     }

dev-packages/ovsx-client/src/ovsx-http-client.ts

@@ -16,22 +16,26 @@
 
 import { OVSXClient, VSXQueryOptions, VSXQueryResult, VSXSearchOptions, VSXSearchResult } from './ovsx-types';
 import { RequestContext, RequestService } from '@theia/request';
+import { RateLimiter } from 'limiter';
+
+export const OVSX_RATE_LIMIT = 15;
 
 export class OVSXHttpClient implements OVSXClient {
 
     /**
      * @param requestService
      * @returns factory that will cache clients based on the requested input URL.
      */
-    static createClientFactory(requestService: RequestService): (url: string) => OVSXClient {
+    static createClientFactory(requestService: RequestService, rateLimiter?: RateLimiter): (url: string) => OVSXClient {
         // eslint-disable-next-line no-null/no-null
         const cachedClients: Record<string, OVSXClient> = Object.create(null);
-        return url => cachedClients[url] ??= new this(url, requestService);
+        return url => cachedClients[url] ??= new this(url, requestService, rateLimiter);
     }
 
     constructor(
         protected vsxRegistryUrl: string,
-        protected requestService: RequestService
+        protected requestService: RequestService,
+        protected rateLimiter = new RateLimiter({ tokensPerInterval: OVSX_RATE_LIMIT, interval: 'second' })
     ) { }
 
     search(searchOptions?: VSXSearchOptions): Promise<VSXSearchResult> {
@@ -43,10 +47,25 @@ export class OVSXHttpClient implements OVSXClient {
     }
 
     protected async requestJson<R>(url: string): Promise<R> {
-        return RequestContext.asJson<R>(await this.requestService.request({
-            url,
-            headers: { 'Accept': 'application/json' }
-        }));
+        const attempts = 5;
+        for (let i = 0; i < attempts; i++) {
+            // Use 1, 2, 4, 8, 16 tokens for each attempt
+            const tokenCount = Math.pow(2, i);
+            await this.rateLimiter.removeTokens(tokenCount);
+            const context = await this.requestService.request({
+                url,
+                headers: { 'Accept': 'application/json' }
+            });
+            if (context.res.statusCode === 429) {
+                console.warn('OVSX rate limit exceeded. Consider reducing the rate limit.');
+                // If there are still more attempts left, retry the request with a higher token count
+                if (i < attempts - 1) {
+                    continue;
+                }
+            }
+            return RequestContext.asJson<R>(context);
+        }
+        throw new Error('Failed to fetch data from OVSX.');
     }
 
     protected buildUrl(url: string, query?: object): string {

packages/vsx-registry/package.json

@@ -11,6 +11,7 @@
     "@theia/plugin-ext-vscode": "1.52.0",
     "@theia/preferences": "1.52.0",
     "@theia/workspace": "1.52.0",
+    "limiter": "^2.1.0",
     "luxon": "^2.4.0",
     "p-debounce": "^2.1.0",
     "semver": "^7.5.4",

packages/vsx-registry/src/common/vsx-environment.ts

@@ -20,6 +20,7 @@ export const VSX_ENVIRONMENT_PATH = '/services/vsx-environment';
 
 export const VSXEnvironment = Symbol('VSXEnvironment');
 export interface VSXEnvironment {
+    getRateLimit(): Promise<number>;
     getRegistryUri(): Promise<string>;
     getRegistryApiUri(): Promise<string>;
     getVscodeApiVersion(): Promise<string>;

packages/vsx-registry/src/common/vsx-registry-common-module.ts

@@ -21,6 +21,7 @@ import {
     ExtensionIdMatchesFilterFactory, OVSXApiFilter, OVSXApiFilterImpl, OVSXApiFilterProvider, OVSXClient, OVSXHttpClient, OVSXRouterClient, RequestContainsFilterFactory
 } from '@theia/ovsx-client';
 import { VSXEnvironment } from './vsx-environment';
+import { RateLimiter } from 'limiter';
 
 export default new ContainerModule(bind => {
     bind(OVSXUrlResolver)
@@ -34,10 +35,15 @@ export default new ContainerModule(bind => {
                 .all([
                     vsxEnvironment.getRegistryApiUri(),
                     vsxEnvironment.getOvsxRouterConfig?.(),
+                    vsxEnvironment.getRateLimit()
                 ])
-                .then<OVSXClient>(async ([apiUrl, ovsxRouterConfig]) => {
+                .then<OVSXClient>(async ([apiUrl, ovsxRouterConfig, rateLimit]) => {
+                    const rateLimiter = new RateLimiter({
+                        interval: 'second',
+                        tokensPerInterval: rateLimit
+                    });
                     if (ovsxRouterConfig) {
-                        const clientFactory = OVSXHttpClient.createClientFactory(requestService);
+                        const clientFactory = OVSXHttpClient.createClientFactory(requestService, rateLimiter);
                         return OVSXRouterClient.FromConfig(
                             ovsxRouterConfig,
                             async url => clientFactory(await urlResolver(url)),
@@ -46,7 +52,8 @@ export default new ContainerModule(bind => {
                     }
                     return new OVSXHttpClient(
                         await urlResolver(apiUrl),
-                        requestService
+                        requestService,
+                        rateLimiter
                     );
                 });
             // reuse the promise for subsequent calls to this provider

packages/vsx-registry/src/node/vsx-cli.ts

@@ -17,17 +17,19 @@
 import { CliContribution } from '@theia/core/lib/node';
 import { injectable } from '@theia/core/shared/inversify';
 import { Argv } from '@theia/core/shared/yargs';
-import { OVSXRouterConfig } from '@theia/ovsx-client';
+import { OVSX_RATE_LIMIT, OVSXRouterConfig } from '@theia/ovsx-client';
 import * as fs from 'fs';
 
 @injectable()
 export class VsxCli implements CliContribution {
 
     ovsxRouterConfig: OVSXRouterConfig | undefined;
+    ovsxRateLimit: number;
     pluginsToInstall: string[] = [];
 
     configure(conf: Argv<{}>): void {
         conf.option('ovsx-router-config', { description: 'JSON configuration file for the OVSX router client', type: 'string' });
+        conf.option('ovsx-rate-limit', { description: 'Limits the number of requests to OVSX per second', type: 'number', default: OVSX_RATE_LIMIT });
         conf.option('install-plugin', {
             alias: 'install-extension',
             nargs: 1,
@@ -47,5 +49,7 @@ export class VsxCli implements CliContribution {
         if (Array.isArray(pluginsToInstall)) {
             this.pluginsToInstall = pluginsToInstall;
         }
+        const ovsxRateLimit = args.ovsxRateLimit;
+        this.ovsxRateLimit = typeof ovsxRateLimit === 'number' ? ovsxRateLimit : OVSX_RATE_LIMIT;
     }
 }

packages/vsx-registry/src/node/vsx-environment-impl.ts

@@ -32,6 +32,10 @@ export class VSXEnvironmentImpl implements VSXEnvironment {
     @inject(VsxCli)
     protected vsxCli: VsxCli;
 
+    async getRateLimit(): Promise<number> {
+        return this.vsxCli.ovsxRateLimit;
+    }
+
     async getRegistryUri(): Promise<string> {
         return this._registryUri.toString(true);
     }