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Add rudimentary single-query rate limit #78

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Add rudimentary single-query rate limit #78

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9 changes: 7 additions & 2 deletions src/endpoint.js
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Original file line number Diff line number Diff line change
Expand Up @@ -471,13 +471,18 @@ module.exports = class AbstractEndpoint {
}

// Execute multiple requests in parallel
_requestMany (urls, type = 'json') {
async _requestMany (urls, type = 'json') {
urls = urls.map(url => this._buildUrl(url))

/* istanbul ignore next */
const credentials = this.credentials ? 'include' : undefined

return this.fetch.many(urls, { type, credentials })
// rudimentry rate limit on single queries (e.g. api.items().all())
const BURST_LIMIT = 300 // hardcoded; 600 limit exposed in headers is inaccurate
const WAIT_TIME = 1 // lets-fetch adds wait time to sequential response rather than enforcing minimum sequential delay
const burst = await this.fetch.many(urls.slice(0, BURST_LIMIT - 1), { type, credentials })
const remaining = await this.fetch.many(urls.slice(BURST_LIMIT), { type, credentials, waitTime: WAIT_TIME })
return [...burst, ...remaining]
}

// Build the headers for localization and authentication
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