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{ API } from '@sentry/core';\nimport {\n Event,\n Response as SentryResponse,\n SentryRequestType,\n Status,\n Transport,\n TransportOptions,\n} from '@sentry/types';\nimport { logger, parseRetryAfterHeader, PromiseBuffer, SentryError } from '@sentry/utils';\n\nconst CATEGORY_MAPPING: {\n [key in SentryRequestType]: string;\n} = {\n event: 'error',\n transaction: 'transaction',\n session: 'session',\n attachment: 'attachment',\n};\n\n/** Base Transport class implementation */\nexport abstract class BaseTransport implements Transport {\n /**\n * @deprecated\n */\n public url: string;\n\n /** Helper to get Sentry API endpoints. */\n protected readonly _api: API;\n\n /** A simple buffer holding all requests. */\n protected readonly _buffer: PromiseBuffer<SentryResponse> = new PromiseBuffer(30);\n\n /** Locks transport after receiving rate limits in a response */\n protected readonly _rateLimits: Record<string, Date> = {};\n\n public constructor(public options: TransportOptions) {\n this._api = new API(options.dsn, options._metadata, options.tunnel);\n // eslint-disable-next-line deprecation/deprecation\n this.url = this._api.getStoreEndpointWithUrlEncodedAuth();\n }\n\n /**\n * @inheritDoc\n */\n public sendEvent(_: Event): PromiseLike<SentryResponse> {\n throw new SentryError('Transport Class has to implement `sendEvent` method');\n }\n\n /**\n * @inheritDoc\n */\n public close(timeout?: number): PromiseLike<boolean> {\n return this._buffer.drain(timeout);\n }\n\n /**\n * Handle Sentry repsonse for promise-based transports.\n */\n protected _handleResponse({\n requestType,\n response,\n headers,\n resolve,\n reject,\n }: {\n requestType: SentryRequestType;\n response: Response | XMLHttpRequest;\n headers: Record<string, string | null>;\n resolve: (value?: SentryResponse | PromiseLike<SentryResponse> | null | undefined) => void;\n reject: (reason?: unknown) => void;\n }): void {\n const status = Status.fromHttpCode(response.status);\n /**\n * \"The name is case-insensitive.\"\n * https://developer.mozilla.org/en-US/docs/Web/API/Headers/get\n */\n const limited = this._handleRateLimit(headers);\n if (limited)\n logger.warn(`Too many ${requestType} requests, backing off until: ${this._disabledUntil(requestType)}`);\n\n if (status === Status.Success) {\n resolve({ status });\n return;\n }\n\n reject(response);\n }\n\n /**\n * Gets the time that given category is disabled until for rate limiting\n */\n protected _disabledUntil(requestType: SentryRequestType): Date {\n const category = CATEGORY_MAPPING[requestType];\n return this._rateLimits[category] || this._rateLimits.all;\n }\n\n /**\n * Checks if a category is rate limited\n */\n protected _isRateLimited(requestType: SentryRequestType): boolean {\n return this._disabledUntil(requestType) > new Date(Date.now());\n }\n\n /**\n * Sets internal _rateLimits from incoming headers. Returns true if headers contains a non-empty rate limiting header.\n */\n protected _handleRateLimit(headers: Record<string, string | null>): boolean {\n const now = Date.now();\n const rlHeader = headers['x-sentry-rate-limits'];\n const raHeader = headers['retry-after'];\n\n if (rlHeader) {\n // rate limit headers are of the form\n // <header>,<header>,..\n // where each <header> is of the form\n // <retry_after>: <categories>: <scope>: <reason_code>\n // where\n // <retry_after> is a delay in ms\n // <categories> is the event type(s) (error, transaction, etc) being rate limited and is of the form\n // <category>;<category>;...\n // <scope> is what's being limited (org, project, or key) - ignored by SDK\n // <reason_code> is an arbitrary string like \"org_quota\" - ignored by SDK\n for (const limit of rlHeader.trim().split(',')) {\n const parameters = limit.split(':', 2);\n const headerDelay = parseInt(parameters[0], 10);\n const delay = (!isNaN(headerDelay) ? headerDelay : 60) * 1000; // 60sec default\n for (const category of parameters[1].split(';')) {\n this._rateLimits[category || 'all'] = new Date(now + delay);\n }\n }\n return true;\n } else if (raHeader) {\n this._rateLimits.all = new Date(now + parseRetryAfterHeader(now, raHeader));\n return true;\n }\n return false;\n }\n}\n"]} |