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File size: 53,001 Bytes
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{ invariant } from 'outvariant'\nimport { Emitter } from 'strict-event-emitter'\nimport { HttpRequestEventMap, IS_PATCHED_MODULE } from '../../glossary'\nimport { InteractiveRequest } from '../../utils/toInteractiveRequest'\nimport { Interceptor } from '../../Interceptor'\nimport { createXMLHttpRequestProxy } from './XMLHttpRequestProxy'\n\nexport type XMLHttpRequestEventListener = (args: {\n request: InteractiveRequest\n requestId: string\n}) => Promise<void> | void\n\nexport type XMLHttpRequestEmitter = Emitter<HttpRequestEventMap>\n\nexport class XMLHttpRequestInterceptor extends Interceptor<HttpRequestEventMap> {\n static interceptorSymbol = Symbol('xhr')\n\n constructor() {\n super(XMLHttpRequestInterceptor.interceptorSymbol)\n }\n\n protected checkEnvironment() {\n return typeof globalThis.XMLHttpRequest !== 'undefined'\n }\n\n protected setup() {\n const logger = this.logger.extend('setup')\n\n logger.info('patching \"XMLHttpRequest\" module...')\n\n const PureXMLHttpRequest = globalThis.XMLHttpRequest\n\n invariant(\n !(PureXMLHttpRequest as any)[IS_PATCHED_MODULE],\n 'Failed to patch the \"XMLHttpRequest\" module: already patched.'\n )\n\n globalThis.XMLHttpRequest = createXMLHttpRequestProxy({\n emitter: this.emitter,\n logger: this.logger,\n })\n\n logger.info(\n 'native \"XMLHttpRequest\" module patched!',\n globalThis.XMLHttpRequest.name\n )\n\n Object.defineProperty(globalThis.XMLHttpRequest, IS_PATCHED_MODULE, {\n enumerable: true,\n configurable: true,\n value: true,\n })\n\n this.subscriptions.push(() => {\n Object.defineProperty(globalThis.XMLHttpRequest, IS_PATCHED_MODULE, {\n value: undefined,\n })\n\n globalThis.XMLHttpRequest = PureXMLHttpRequest\n logger.info(\n 'native \"XMLHttpRequest\" module restored!',\n globalThis.XMLHttpRequest.name\n )\n })\n }\n}\n","import { until } from '@open-draft/until'\nimport type { Logger } from '@open-draft/logger'\nimport { XMLHttpRequestEmitter } from '.'\nimport { toInteractiveRequest } from '../../utils/toInteractiveRequest'\nimport { emitAsync } from '../../utils/emitAsync'\nimport { XMLHttpRequestController } from './XMLHttpRequestController'\nimport {\n createServerErrorResponse,\n isResponseError,\n} from '../../utils/responseUtils'\n\nexport interface XMLHttpRequestProxyOptions {\n emitter: XMLHttpRequestEmitter\n logger: Logger\n}\n\n/**\n * Create a proxied `XMLHttpRequest` class.\n * The proxied class establishes spies on certain methods,\n * allowing us to intercept requests and respond to them.\n */\nexport function createXMLHttpRequestProxy({\n emitter,\n logger,\n}: XMLHttpRequestProxyOptions) {\n const XMLHttpRequestProxy = new Proxy(globalThis.XMLHttpRequest, {\n construct(target, args, newTarget) {\n logger.info('constructed new XMLHttpRequest')\n\n const originalRequest = Reflect.construct(\n target,\n args,\n newTarget\n ) as XMLHttpRequest\n\n /**\n * @note Forward prototype descriptors onto the proxied object.\n * XMLHttpRequest is implemented in JSDOM in a way that assigns\n * a bunch of descriptors, like \"set responseType()\" on the prototype.\n * With this propagation, we make sure that those descriptors trigger\n * when the user operates with the proxied request instance.\n */\n const prototypeDescriptors = Object.getOwnPropertyDescriptors(\n target.prototype\n )\n for (const propertyName in prototypeDescriptors) {\n Reflect.defineProperty(\n originalRequest,\n propertyName,\n prototypeDescriptors[propertyName]\n )\n }\n\n const xhrRequestController = new XMLHttpRequestController(\n originalRequest,\n logger\n )\n\n xhrRequestController.onRequest = async function ({ request, requestId }) {\n const { interactiveRequest, requestController } =\n toInteractiveRequest(request)\n\n this.logger.info('awaiting mocked response...')\n\n emitter.once('request', ({ requestId: pendingRequestId }) => {\n if (pendingRequestId !== requestId) {\n return\n }\n\n if (requestController.responsePromise.state === 'pending') {\n requestController.respondWith(undefined)\n }\n })\n\n const resolverResult = await until(async () => {\n this.logger.info(\n 'emitting the \"request\" event for %s listener(s)...',\n emitter.listenerCount('request')\n )\n\n await emitAsync(emitter, 'request', {\n request: interactiveRequest,\n requestId,\n })\n\n this.logger.info('all \"request\" listeners settled!')\n\n const mockedResponse = await requestController.responsePromise\n\n this.logger.info('event.respondWith called with:', mockedResponse)\n\n return mockedResponse\n })\n\n if (resolverResult.error) {\n this.logger.info(\n 'request listener threw an exception, aborting request...',\n resolverResult.error\n )\n\n // Treat thrown Responses as mocked responses.\n if (resolverResult.error instanceof Response) {\n if (isResponseError(resolverResult.error)) {\n xhrRequestController.errorWith(new TypeError('Network error'))\n } else {\n this.respondWith(resolverResult.error)\n }\n\n return\n }\n\n if (emitter.listenerCount('unhandledException') > 0) {\n // Emit the \"unhandledException\" event so the client can opt-out\n // from the default exception handling (producing 500 error responses).\n await emitAsync(emitter, 'unhandledException', {\n error: resolverResult.error,\n request,\n requestId,\n controller: {\n respondWith:\n xhrRequestController.respondWith.bind(xhrRequestController),\n errorWith:\n xhrRequestController.errorWith.bind(xhrRequestController),\n },\n })\n\n // If any of the \"unhandledException\" listeners handled the request,\n // do nothing. Note that mocked responses will dispatch\n // HEADERS_RECEIVED (2), then LOADING (3), and DONE (4) can take\n // time as the mocked response body finishes streaming.\n if (originalRequest.readyState > XMLHttpRequest.OPENED) {\n return\n }\n }\n\n // Unhandled exceptions in the request listeners are\n // synonymous to unhandled exceptions on the server.\n // Those are represented as 500 error responses.\n xhrRequestController.respondWith(\n createServerErrorResponse(resolverResult.error)\n )\n\n return\n }\n\n const mockedResponse = resolverResult.data\n\n if (typeof mockedResponse !== 'undefined') {\n this.logger.info(\n 'received mocked response: %d %s',\n mockedResponse.status,\n mockedResponse.statusText\n )\n\n if (isResponseError(mockedResponse)) {\n this.logger.info(\n 'received a network error response, rejecting the request promise...'\n )\n\n xhrRequestController.errorWith(new TypeError('Network error'))\n return\n }\n\n return xhrRequestController.respondWith(mockedResponse)\n }\n\n this.logger.info(\n 'no mocked response received, performing request as-is...'\n )\n }\n\n xhrRequestController.onResponse = async function ({\n response,\n isMockedResponse,\n request,\n requestId,\n }) {\n this.logger.info(\n 'emitting the \"response\" event for %s listener(s)...',\n emitter.listenerCount('response')\n )\n\n emitter.emit('response', {\n response,\n isMockedResponse,\n request,\n requestId,\n })\n }\n\n // Return the proxied request from the controller\n // so that the controller can react to the consumer's interactions\n // with this request (opening/sending/etc).\n return xhrRequestController.request\n },\n })\n\n return XMLHttpRequestProxy\n}\n","import { invariant } from 'outvariant'\nimport { isNodeProcess } from 'is-node-process'\nimport type { Logger } from '@open-draft/logger'\nimport { concatArrayBuffer } from './utils/concatArrayBuffer'\nimport { createEvent } from './utils/createEvent'\nimport {\n decodeBuffer,\n encodeBuffer,\n toArrayBuffer,\n} from '../../utils/bufferUtils'\nimport { createProxy } from '../../utils/createProxy'\nimport { isDomParserSupportedType } from './utils/isDomParserSupportedType'\nimport { parseJson } from '../../utils/parseJson'\nimport { createResponse } from './utils/createResponse'\nimport { INTERNAL_REQUEST_ID_HEADER_NAME } from '../../Interceptor'\nimport { createRequestId } from '../../createRequestId'\n\nconst IS_MOCKED_RESPONSE = Symbol('isMockedResponse')\nconst IS_NODE = isNodeProcess()\n\n/**\n * An `XMLHttpRequest` instance controller that allows us\n * to handle any given request instance (e.g. responding to it).\n */\nexport class XMLHttpRequestController {\n public request: XMLHttpRequest\n public requestId: string\n public onRequest?: (\n this: XMLHttpRequestController,\n args: {\n request: Request\n requestId: string\n }\n ) => Promise<void>\n public onResponse?: (\n this: XMLHttpRequestController,\n args: {\n response: Response\n isMockedResponse: boolean\n request: Request\n requestId: string\n }\n ) => void\n\n private method: string = 'GET'\n private url: URL = null as any\n private requestHeaders: Headers\n private requestBody?: XMLHttpRequestBodyInit | Document | null\n private responseBuffer: Uint8Array\n private events: Map<keyof XMLHttpRequestEventTargetEventMap, Array<Function>>\n\n constructor(readonly initialRequest: XMLHttpRequest, public logger: Logger) {\n this.events = new Map()\n this.requestId = createRequestId()\n this.requestHeaders = new Headers()\n this.responseBuffer = new Uint8Array()\n\n this.request = createProxy(initialRequest, {\n setProperty: ([propertyName, nextValue], invoke) => {\n switch (propertyName) {\n case 'ontimeout': {\n const eventName = propertyName.slice(\n 2\n ) as keyof XMLHttpRequestEventTargetEventMap\n\n /**\n * @note Proxy callbacks to event listeners because JSDOM has trouble\n * translating these properties to callbacks. It seemed to be operating\n * on events exclusively.\n */\n this.request.addEventListener(eventName, nextValue as any)\n\n return invoke()\n }\n\n default: {\n return invoke()\n }\n }\n },\n methodCall: ([methodName, args], invoke) => {\n switch (methodName) {\n case 'open': {\n const [method, url] = args as [string, string | undefined]\n\n if (typeof url === 'undefined') {\n this.method = 'GET'\n this.url = toAbsoluteUrl(method)\n } else {\n this.method = method\n this.url = toAbsoluteUrl(url)\n }\n\n this.logger = this.logger.extend(`${this.method} ${this.url.href}`)\n this.logger.info('open', this.method, this.url.href)\n\n return invoke()\n }\n\n case 'addEventListener': {\n const [eventName, listener] = args as [\n keyof XMLHttpRequestEventTargetEventMap,\n Function\n ]\n\n this.registerEvent(eventName, listener)\n this.logger.info('addEventListener', eventName, listener)\n\n return invoke()\n }\n\n case 'setRequestHeader': {\n const [name, value] = args as [string, string]\n this.requestHeaders.set(name, value)\n\n this.logger.info('setRequestHeader', name, value)\n\n return invoke()\n }\n\n case 'send': {\n const [body] = args as [\n body?: XMLHttpRequestBodyInit | Document | null\n ]\n\n if (body != null) {\n this.requestBody =\n typeof body === 'string' ? encodeBuffer(body) : body\n }\n\n this.request.addEventListener('load', () => {\n if (typeof this.onResponse !== 'undefined') {\n // Create a Fetch API Response representation of whichever\n // response this XMLHttpRequest received. Note those may\n // be either a mocked and the original response.\n const fetchResponse = createResponse(\n this.request,\n /**\n * The `response` property is the right way to read\n * the ambiguous response body, as the request's \"responseType\" may differ.\n * @see https://xhr.spec.whatwg.org/#the-response-attribute\n */\n this.request.response\n )\n\n // Notify the consumer about the response.\n this.onResponse.call(this, {\n response: fetchResponse,\n isMockedResponse: IS_MOCKED_RESPONSE in this.request,\n request: fetchRequest,\n requestId: this.requestId!,\n })\n }\n })\n\n // Delegate request handling to the consumer.\n const fetchRequest = this.toFetchApiRequest()\n const onceRequestSettled =\n this.onRequest?.call(this, {\n request: fetchRequest,\n requestId: this.requestId!,\n }) || Promise.resolve()\n\n onceRequestSettled.finally(() => {\n // If the consumer didn't handle the request perform it as-is.\n // Note that the request may not yet be DONE and may, in fact,\n // be LOADING while the \"respondWith\" method does its magic.\n if (this.request.readyState < this.request.LOADING) {\n this.logger.info(\n 'request callback settled but request has not been handled (readystate %d), performing as-is...',\n this.request.readyState\n )\n\n /**\n * @note Set the intercepted request ID on the original request in Node.js\n * so that if it triggers any other interceptors, they don't attempt\n * to process it once again.\n *\n * For instance, XMLHttpRequest is often implemented via \"http.ClientRequest\"\n * and we don't want for both XHR and ClientRequest interceptors to\n * handle the same request at the same time (e.g. emit the \"response\" event twice).\n */\n if (IS_NODE) {\n this.request.setRequestHeader(\n INTERNAL_REQUEST_ID_HEADER_NAME,\n this.requestId!\n )\n }\n\n return invoke()\n }\n })\n\n break\n }\n\n default: {\n return invoke()\n }\n }\n },\n })\n }\n\n private registerEvent(\n eventName: keyof XMLHttpRequestEventTargetEventMap,\n listener: Function\n ): void {\n const prevEvents = this.events.get(eventName) || []\n const nextEvents = prevEvents.concat(listener)\n this.events.set(eventName, nextEvents)\n\n this.logger.info('registered event \"%s\"', eventName, listener)\n }\n\n /**\n * Responds to the current request with the given\n * Fetch API `Response` instance.\n */\n public respondWith(response: Response): void {\n this.logger.info(\n 'responding with a mocked response: %d %s',\n response.status,\n response.statusText\n )\n\n /**\n * @note Since `XMLHttpRequestController` delegates the handling of the responses\n * to the \"load\" event listener that doesn't distinguish between the mocked and original\n * responses, mark the request that had a mocked response with a corresponding symbol.\n */\n define(this.request, IS_MOCKED_RESPONSE, true)\n\n define(this.request, 'status', response.status)\n define(this.request, 'statusText', response.statusText)\n define(this.request, 'responseURL', this.url.href)\n\n this.request.getResponseHeader = new Proxy(this.request.getResponseHeader, {\n apply: (_, __, args: [name: string]) => {\n this.logger.info('getResponseHeader', args[0])\n\n if (this.request.readyState < this.request.HEADERS_RECEIVED) {\n this.logger.info('headers not received yet, returning null')\n\n // Headers not received yet, nothing to return.\n return null\n }\n\n const headerValue = response.headers.get(args[0])\n this.logger.info(\n 'resolved response header \"%s\" to',\n args[0],\n headerValue\n )\n\n return headerValue\n },\n })\n\n this.request.getAllResponseHeaders = new Proxy(\n this.request.getAllResponseHeaders,\n {\n apply: () => {\n this.logger.info('getAllResponseHeaders')\n\n if (this.request.readyState < this.request.HEADERS_RECEIVED) {\n this.logger.info('headers not received yet, returning empty string')\n\n // Headers not received yet, nothing to return.\n return ''\n }\n\n const headersList = Array.from(response.headers.entries())\n const allHeaders = headersList\n .map(([headerName, headerValue]) => {\n return `${headerName}: ${headerValue}`\n })\n .join('\\r\\n')\n\n this.logger.info('resolved all response headers to', allHeaders)\n\n return allHeaders\n },\n }\n )\n\n // Update the response getters to resolve against the mocked response.\n Object.defineProperties(this.request, {\n response: {\n enumerable: true,\n configurable: false,\n get: () => this.response,\n },\n responseText: {\n enumerable: true,\n configurable: false,\n get: () => this.responseText,\n },\n responseXML: {\n enumerable: true,\n configurable: false,\n get: () => this.responseXML,\n },\n })\n\n const totalResponseBodyLength = response.headers.has('Content-Length')\n ? Number(response.headers.get('Content-Length'))\n : /**\n * @todo Infer the response body length from the response body.\n */\n undefined\n\n this.logger.info('calculated response body length', totalResponseBodyLength)\n\n this.trigger('loadstart', {\n loaded: 0,\n total: totalResponseBodyLength,\n })\n\n this.setReadyState(this.request.HEADERS_RECEIVED)\n this.setReadyState(this.request.LOADING)\n\n const finalizeResponse = () => {\n this.logger.info('finalizing the mocked response...')\n\n this.setReadyState(this.request.DONE)\n\n this.trigger('load', {\n loaded: this.responseBuffer.byteLength,\n total: totalResponseBodyLength,\n })\n\n this.trigger('loadend', {\n loaded: this.responseBuffer.byteLength,\n total: totalResponseBodyLength,\n })\n }\n\n if (response.body) {\n this.logger.info('mocked response has body, streaming...')\n\n const reader = response.body.getReader()\n\n const readNextResponseBodyChunk = async () => {\n const { value, done } = await reader.read()\n\n if (done) {\n this.logger.info('response body stream done!')\n finalizeResponse()\n return\n }\n\n if (value) {\n this.logger.info('read response body chunk:', value)\n this.responseBuffer = concatArrayBuffer(this.responseBuffer, value)\n\n this.trigger('progress', {\n loaded: this.responseBuffer.byteLength,\n total: totalResponseBodyLength,\n })\n }\n\n readNextResponseBodyChunk()\n }\n\n readNextResponseBodyChunk()\n } else {\n finalizeResponse()\n }\n }\n\n private responseBufferToText(): string {\n return decodeBuffer(this.responseBuffer)\n }\n\n get response(): unknown {\n this.logger.info(\n 'getResponse (responseType: %s)',\n this.request.responseType\n )\n\n if (this.request.readyState !== this.request.DONE) {\n return null\n }\n\n switch (this.request.responseType) {\n case 'json': {\n const responseJson = parseJson(this.responseBufferToText())\n this.logger.info('resolved response JSON', responseJson)\n\n return responseJson\n }\n\n case 'arraybuffer': {\n const arrayBuffer = toArrayBuffer(this.responseBuffer)\n this.logger.info('resolved response ArrayBuffer', arrayBuffer)\n\n return arrayBuffer\n }\n\n case 'blob': {\n const mimeType =\n this.request.getResponseHeader('Content-Type') || 'text/plain'\n const responseBlob = new Blob([this.responseBufferToText()], {\n type: mimeType,\n })\n\n this.logger.info(\n 'resolved response Blob (mime type: %s)',\n responseBlob,\n mimeType\n )\n\n return responseBlob\n }\n\n default: {\n const responseText = this.responseBufferToText()\n this.logger.info(\n 'resolving \"%s\" response type as text',\n this.request.responseType,\n responseText\n )\n\n return responseText\n }\n }\n }\n\n get responseText(): string {\n /**\n * Throw when trying to read the response body as text when the\n * \"responseType\" doesn't expect text. This just respects the spec better.\n * @see https://xhr.spec.whatwg.org/#the-responsetext-attribute\n */\n invariant(\n this.request.responseType === '' || this.request.responseType === 'text',\n 'InvalidStateError: The object is in invalid state.'\n )\n\n if (\n this.request.readyState !== this.request.LOADING &&\n this.request.readyState !== this.request.DONE\n ) {\n return ''\n }\n\n const responseText = this.responseBufferToText()\n this.logger.info('getResponseText: \"%s\"', responseText)\n\n return responseText\n }\n\n get responseXML(): Document | null {\n invariant(\n this.request.responseType === '' ||\n this.request.responseType === 'document',\n 'InvalidStateError: The object is in invalid state.'\n )\n\n if (this.request.readyState !== this.request.DONE) {\n return null\n }\n\n const contentType = this.request.getResponseHeader('Content-Type') || ''\n\n if (typeof DOMParser === 'undefined') {\n console.warn(\n 'Cannot retrieve XMLHttpRequest response body as XML: DOMParser is not defined. You are likely using an environment that is not browser or does not polyfill browser globals correctly.'\n )\n return null\n }\n\n if (isDomParserSupportedType(contentType)) {\n return new DOMParser().parseFromString(\n this.responseBufferToText(),\n contentType\n )\n }\n\n return null\n }\n\n public errorWith(error: Error): void {\n this.logger.info('responding with an error')\n\n this.setReadyState(this.request.DONE)\n this.trigger('error')\n this.trigger('loadend')\n }\n\n /**\n * Transitions this request's `readyState` to the given one.\n */\n private setReadyState(nextReadyState: number): void {\n this.logger.info(\n 'setReadyState: %d -> %d',\n this.request.readyState,\n nextReadyState\n )\n\n if (this.request.readyState === nextReadyState) {\n this.logger.info('ready state identical, skipping transition...')\n return\n }\n\n define(this.request, 'readyState', nextReadyState)\n\n this.logger.info('set readyState to: %d', nextReadyState)\n\n if (nextReadyState !== this.request.UNSENT) {\n this.logger.info('triggerring \"readystatechange\" event...')\n\n this.trigger('readystatechange')\n }\n }\n\n /**\n * Triggers given event on the `XMLHttpRequest` instance.\n */\n private trigger<\n EventName extends keyof (XMLHttpRequestEventTargetEventMap & {\n readystatechange: ProgressEvent<XMLHttpRequestEventTarget>\n })\n >(eventName: EventName, options?: ProgressEventInit): void {\n const callback = this.request[`on${eventName}`]\n const event = createEvent(this.request, eventName, options)\n\n this.logger.info('trigger \"%s\"', eventName, options || '')\n\n // Invoke direct callbacks.\n if (typeof callback === 'function') {\n this.logger.info('found a direct \"%s\" callback, calling...', eventName)\n callback.call(this.request, event)\n }\n\n // Invoke event listeners.\n for (const [registeredEventName, listeners] of this.events) {\n if (registeredEventName === eventName) {\n this.logger.info(\n 'found %d listener(s) for \"%s\" event, calling...',\n listeners.length,\n eventName\n )\n\n listeners.forEach((listener) => listener.call(this.request, event))\n }\n }\n }\n\n /**\n * Converts this `XMLHttpRequest` instance into a Fetch API `Request` instance.\n */\n public toFetchApiRequest(): Request {\n this.logger.info('converting request to a Fetch API Request...')\n\n const fetchRequest = new Request(this.url.href, {\n method: this.method,\n headers: this.requestHeaders,\n /**\n * @see https://xhr.spec.whatwg.org/#cross-origin-credentials\n */\n credentials: this.request.withCredentials ? 'include' : 'same-origin',\n body: ['GET', 'HEAD'].includes(this.method)\n ? null\n : (this.requestBody as BodyInit),\n })\n\n const proxyHeaders = createProxy(fetchRequest.headers, {\n methodCall: ([methodName, args], invoke) => {\n // Forward the latest state of the internal request headers\n // because the interceptor might have modified them\n // without responding to the request.\n switch (methodName) {\n case 'append':\n case 'set': {\n const [headerName, headerValue] = args as [string, string]\n this.request.setRequestHeader(headerName, headerValue)\n break\n }\n\n case 'delete': {\n const [headerName] = args as [string]\n console.warn(\n `XMLHttpRequest: Cannot remove a \"${headerName}\" header from the Fetch API representation of the \"${fetchRequest.method} ${fetchRequest.url}\" request. XMLHttpRequest headers cannot be removed.`\n )\n break\n }\n }\n\n return invoke()\n },\n })\n define(fetchRequest, 'headers', proxyHeaders)\n\n this.logger.info('converted request to a Fetch API Request!', fetchRequest)\n\n return fetchRequest\n }\n}\n\nfunction toAbsoluteUrl(url: string | URL): URL {\n /**\n * @note XMLHttpRequest interceptor may run in environments\n * that implement XMLHttpRequest but don't implement \"location\"\n * (for example, React Native). If that's the case, return the\n * input URL as-is (nothing to be relative to).\n * @see https://github.com/mswjs/msw/issues/1777\n */\n if (typeof location === 'undefined') {\n return new URL(url)\n }\n\n return new URL(url.toString(), location.href)\n}\n\nfunction define(\n target: object,\n property: string | symbol,\n value: unknown\n): void {\n Reflect.defineProperty(target, property, {\n // Ensure writable properties to allow redefining readonly properties.\n writable: true,\n enumerable: true,\n value,\n })\n}\n","/**\n * Concatenate two `Uint8Array` buffers.\n */\nexport function concatArrayBuffer(\n left: Uint8Array,\n right: Uint8Array\n): Uint8Array {\n const result = new Uint8Array(left.byteLength + right.byteLength)\n result.set(left, 0)\n result.set(right, left.byteLength)\n return result\n}\n","export class EventPolyfill implements Event {\n readonly AT_TARGET: number = 0\n readonly BUBBLING_PHASE: number = 0\n readonly CAPTURING_PHASE: number = 0\n readonly NONE: number = 0\n\n public type: string = ''\n public srcElement: EventTarget | null = null\n public target: EventTarget | null\n public currentTarget: EventTarget | null = null\n public eventPhase: number = 0\n public timeStamp: number\n public isTrusted: boolean = true\n public composed: boolean = false\n public cancelable: boolean = true\n public defaultPrevented: boolean = false\n public bubbles: boolean = true\n public lengthComputable: boolean = true\n public loaded: number = 0\n public total: number = 0\n\n cancelBubble: boolean = false\n returnValue: boolean = true\n\n constructor(\n type: string,\n options?: { target: EventTarget; currentTarget: EventTarget }\n ) {\n this.type = type\n this.target = options?.target || null\n this.currentTarget = options?.currentTarget || null\n this.timeStamp = Date.now()\n }\n\n public composedPath(): EventTarget[] {\n return []\n }\n\n public initEvent(type: string, bubbles?: boolean, cancelable?: boolean) {\n this.type = type\n this.bubbles = !!bubbles\n this.cancelable = !!cancelable\n }\n\n public preventDefault() {\n this.defaultPrevented = true\n }\n\n public stopPropagation() {}\n public stopImmediatePropagation() {}\n}\n","import { EventPolyfill } from './EventPolyfill'\n\nexport class ProgressEventPolyfill extends EventPolyfill {\n readonly lengthComputable: boolean\n readonly composed: boolean\n readonly loaded: number\n readonly total: number\n\n constructor(type: string, init?: ProgressEventInit) {\n super(type)\n\n this.lengthComputable = init?.lengthComputable || false\n this.composed = init?.composed || false\n this.loaded = init?.loaded || 0\n this.total = init?.total || 0\n }\n}\n","import { EventPolyfill } from '../polyfills/EventPolyfill'\nimport { ProgressEventPolyfill } from '../polyfills/ProgressEventPolyfill'\n\nconst SUPPORTS_PROGRESS_EVENT = typeof ProgressEvent !== 'undefined'\n\nexport function createEvent(\n target: XMLHttpRequest,\n type: string,\n init?: ProgressEventInit\n): EventPolyfill {\n const progressEvents = [\n 'error',\n 'progress',\n 'loadstart',\n 'loadend',\n 'load',\n 'timeout',\n 'abort',\n ]\n\n /**\n * `ProgressEvent` is not supported in React Native.\n * @see https://github.com/mswjs/interceptors/issues/40\n */\n const ProgressEventClass = SUPPORTS_PROGRESS_EVENT\n ? ProgressEvent\n : ProgressEventPolyfill\n\n const event = progressEvents.includes(type)\n ? new ProgressEventClass(type, {\n lengthComputable: true,\n loaded: init?.loaded || 0,\n total: init?.total || 0,\n })\n : new EventPolyfill(type, {\n target,\n currentTarget: target,\n })\n\n return event\n}\n","/**\n * Returns the source object of the given property on the target object\n * (the target itself, any parent in its prototype, or null).\n */\nexport function findPropertySource(\n target: object,\n propertyName: string | symbol\n): object | null {\n if (!(propertyName in target)) {\n return null\n }\n\n const hasProperty = Object.prototype.hasOwnProperty.call(target, propertyName)\n if (hasProperty) {\n return target\n }\n\n const prototype = Reflect.getPrototypeOf(target)\n return prototype ? findPropertySource(prototype, propertyName) : null\n}\n","import { findPropertySource } from './findPropertySource'\n\nexport interface ProxyOptions<Target extends Record<string, any>> {\n constructorCall?(args: Array<unknown>, next: NextFunction<Target>): Target\n\n methodCall?<F extends keyof Target>(\n this: Target,\n data: [methodName: F, args: Array<unknown>],\n next: NextFunction<void>\n ): void\n\n setProperty?(\n data: [propertyName: string | symbol, nextValue: unknown],\n next: NextFunction<boolean>\n ): boolean\n\n getProperty?(\n data: [propertyName: string | symbol, receiver: Target],\n next: NextFunction<void>\n ): void\n}\n\nexport type NextFunction<ReturnType> = () => ReturnType\n\nexport function createProxy<Target extends object>(\n target: Target,\n options: ProxyOptions<Target>\n): Target {\n const proxy = new Proxy(target, optionsToProxyHandler(options))\n\n return proxy\n}\n\nfunction optionsToProxyHandler<T extends Record<string, any>>(\n options: ProxyOptions<T>\n): ProxyHandler<T> {\n const { constructorCall, methodCall, getProperty, setProperty } = options\n const handler: ProxyHandler<T> = {}\n\n if (typeof constructorCall !== 'undefined') {\n handler.construct = function (target, args, newTarget) {\n const next = Reflect.construct.bind(null, target as any, args, newTarget)\n return constructorCall.call(newTarget, args, next)\n }\n }\n\n handler.set = function (target, propertyName, nextValue) {\n const next = () => {\n const propertySource = findPropertySource(target, propertyName) || target\n const ownDescriptors = Reflect.getOwnPropertyDescriptor(\n propertySource,\n propertyName\n )\n\n // Respect any custom setters present for this property.\n if (typeof ownDescriptors?.set !== 'undefined') {\n ownDescriptors.set.apply(target, [nextValue])\n return true\n }\n\n // Otherwise, set the property on the source.\n return Reflect.defineProperty(propertySource, propertyName, {\n writable: true,\n enumerable: true,\n configurable: true,\n value: nextValue,\n })\n }\n\n if (typeof setProperty !== 'undefined') {\n return setProperty.call(target, [propertyName, nextValue], next)\n }\n\n return next()\n }\n\n handler.get = function (target, propertyName, receiver) {\n /**\n * @note Using `Reflect.get()` here causes \"TypeError: Illegal invocation\".\n */\n const next = () => target[propertyName as any]\n\n const value =\n typeof getProperty !== 'undefined'\n ? getProperty.call(target, [propertyName, receiver], next)\n : next()\n\n if (typeof value === 'function') {\n return (...args: Array<any>) => {\n const next = value.bind(target, ...args)\n\n if (typeof methodCall !== 'undefined') {\n return methodCall.call(target, [propertyName as any, args], next)\n }\n\n return next()\n }\n }\n\n return value\n }\n\n return handler\n}\n","export function isDomParserSupportedType(\n type: string\n): type is DOMParserSupportedType {\n const supportedTypes: Array<DOMParserSupportedType> = [\n 'application/xhtml+xml',\n 'application/xml',\n 'image/svg+xml',\n 'text/html',\n 'text/xml',\n ]\n return supportedTypes.some((supportedType) => {\n return type.startsWith(supportedType)\n })\n}\n","/**\n * Parses a given string into JSON.\n * Gracefully handles invalid JSON by returning `null`.\n */\nexport function parseJson(data: string): Record<string, unknown> | null {\n try {\n const json = JSON.parse(data)\n return json\n } catch (_) {\n return null\n }\n}\n","import { isResponseWithoutBody } from '../../../utils/responseUtils'\n\n/**\n * Creates a Fetch API `Response` instance from the given\n * `XMLHttpRequest` instance and a response body.\n */\nexport function createResponse(\n request: XMLHttpRequest,\n body: BodyInit | null\n): Response {\n /**\n * Handle XMLHttpRequest responses that must have null as the\n * response body when represented using Fetch API Response.\n * XMLHttpRequest response will always have an empty string\n * as the \"request.response\" in those cases, resulting in an error\n * when constructing a Response instance.\n * @see https://github.com/mswjs/interceptors/issues/379\n */\n const responseBodyOrNull = isResponseWithoutBody(request.status) ? null : body\n\n return new Response(responseBodyOrNull, {\n status: request.status,\n statusText: request.statusText,\n headers: createHeadersFromXMLHttpReqestHeaders(\n request.getAllResponseHeaders()\n ),\n })\n}\n\nfunction createHeadersFromXMLHttpReqestHeaders(headersString: string): Headers {\n const headers = new Headers()\n\n const lines = headersString.split(/[\\r\\n]+/)\n for (const line of lines) {\n if (line.trim() === '') {\n continue\n }\n\n const [name, ...parts] = line.split(': ')\n const value = parts.join(': ')\n\n headers.append(name, value)\n }\n\n return headers\n}\n"]} |