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fix: improve
fetch fallback, drop dead IE legacy (#64)
Co-authored-by: Cody Olsen <81981+stipsan@users.noreply.github.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,72 +1,101 @@ | ||
| /** | ||
| * Mimicks the XMLHttpRequest API with only the parts needed for get-it's XHR adapter | ||
| */ | ||
| function FetchXhr(this: any) { | ||
| this.readyState = 0 // Unsent | ||
| } | ||
| FetchXhr.prototype.open = function (method: any, url: any) { | ||
| this._method = method | ||
| this._url = url | ||
| this._resHeaders = '' | ||
| this.readyState = 1 // Open | ||
| this.onreadystatechange() | ||
| } | ||
| FetchXhr.prototype.abort = function () { | ||
| if (this._controller) { | ||
| this._controller.abort() | ||
| export class FetchXhr | ||
| implements Pick<XMLHttpRequest, 'open' | 'abort' | 'getAllResponseHeaders' | 'setRequestHeader'> | ||
| { | ||
| /** | ||
| * Public interface, interop with real XMLHttpRequest | ||
| */ | ||
| onabort: () => void | ||
| onerror: (error?: any) => void | ||
| onreadystatechange: () => void | ||
| ontimeout: XMLHttpRequest['ontimeout'] | ||
| /** | ||
| * https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/readyState | ||
| */ | ||
| readyState: 0 | 1 | 2 | 3 | 4 = 0 | ||
| response: XMLHttpRequest['response'] | ||
| responseText: XMLHttpRequest['responseText'] | ||
| responseType: XMLHttpRequest['responseType'] | ||
| status: XMLHttpRequest['status'] | ||
| statusText: XMLHttpRequest['statusText'] | ||
| withCredentials: XMLHttpRequest['withCredentials'] | ||
|
|
||
| /** | ||
| * Private implementation details | ||
| */ | ||
| #method: string | ||
| #url: string | ||
| #resHeaders: string | ||
| #headers: Record<string, string> = {} | ||
| #controller?: AbortController | ||
| // eslint-disable-next-line @typescript-eslint/no-unused-vars -- _async is only declared for typings compatibility | ||
| open(method: string, url: string, _async?: boolean) { | ||
| this.#method = method | ||
| this.#url = url | ||
| this.#resHeaders = '' | ||
| this.readyState = 1 // Open | ||
| this.onreadystatechange() | ||
| this.#controller = undefined | ||
| } | ||
| } | ||
| FetchXhr.prototype.getAllResponseHeaders = function () { | ||
| return this._resHeaders | ||
| } | ||
| FetchXhr.prototype.setRequestHeader = function (key: any, value: any) { | ||
| this._headers = this._headers || {} | ||
| this._headers[key] = value | ||
| } | ||
| FetchXhr.prototype.send = function (body: any) { | ||
| const ctrl = (this._controller = typeof AbortController === 'function' && new AbortController()) | ||
| const textBody = this.responseType !== 'arraybuffer' | ||
| const options: any = { | ||
| method: this._method, | ||
| headers: this._headers, | ||
| signal: (ctrl && ctrl.signal) || undefined, | ||
| body, | ||
| abort() { | ||
| if (this.#controller) { | ||
| this.#controller.abort() | ||
| } | ||
| } | ||
|
|
||
| // Some environments (like CloudFlare workers) don't support credentials in | ||
| // RequestInitDict, and there doesn't seem to be any easy way to check for it, | ||
| // so for now let's just make do with a window check :/ | ||
| if (typeof document !== 'undefined') { | ||
| options.credentials = this.withCredentials ? 'include' : 'omit' | ||
| getAllResponseHeaders() { | ||
| return this.#resHeaders | ||
| } | ||
| setRequestHeader(name: string, value: string) { | ||
| this.#headers[name] = value | ||
| } | ||
| send(body: BodyInit) { | ||
| const textBody = this.responseType !== 'arraybuffer' | ||
| const options: RequestInit = { | ||
| method: this.#method, | ||
| headers: this.#headers, | ||
| signal: null, | ||
| body, | ||
| } | ||
| if (typeof AbortController === 'function') { | ||
| this.#controller = new AbortController() | ||
| options.signal = this.#controller.signal | ||
| } | ||
|
|
||
| // Some environments (like CloudFlare workers) don't support credentials in | ||
| // RequestInitDict, and there doesn't seem to be any easy way to check for it, | ||
| // so for now let's just make do with a document check :/ | ||
| if (typeof document !== 'undefined') { | ||
| options.credentials = this.withCredentials ? 'include' : 'omit' | ||
| } | ||
|
|
||
| fetch(this._url, options) | ||
| .then((res: any) => { | ||
| res.headers.forEach((value: any, key: any) => { | ||
| this._resHeaders += `${key}: ${value}\r\n` | ||
| fetch(this.#url, options) | ||
| .then((res): Promise<string | ArrayBuffer> => { | ||
| res.headers.forEach((value: any, key: any) => { | ||
| this.#resHeaders += `${key}: ${value}\r\n` | ||
| }) | ||
| this.status = res.status | ||
| this.statusText = res.statusText | ||
| this.readyState = 3 // Loading | ||
| return textBody ? res.text() : res.arrayBuffer() | ||
| }) | ||
| .then((resBody) => { | ||
| if (typeof resBody === 'string') { | ||
| this.responseText = resBody | ||
| } else { | ||
| this.response = resBody | ||
| } | ||
| this.readyState = 4 // Done | ||
| this.onreadystatechange() | ||
| }) | ||
| this.status = res.status | ||
| this.statusText = res.statusText | ||
| this.readyState = 3 // Loading | ||
| return textBody ? res.text() : res.arrayBuffer() | ||
| }) | ||
| .then((resBody) => { | ||
| if (textBody) { | ||
| this.responseText = resBody | ||
| } else { | ||
| this.response = resBody | ||
| } | ||
| this.readyState = 4 // Done | ||
| this.onreadystatechange() | ||
| }) | ||
| .catch((err) => { | ||
| if (err.name === 'AbortError') { | ||
| this.onabort() | ||
| return | ||
| } | ||
| .catch((err: Error) => { | ||
| if (err.name === 'AbortError') { | ||
| this.onabort() | ||
| return | ||
| } | ||
|
|
||
| this.onerror(err) | ||
| }) | ||
| this.onerror?.(err) | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| export default FetchXhr |
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