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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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