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import { AjaxRequest, AjaxResponseType } from './types';
import { getXHRResponse } from './getXHRResponse';
/**
* A normalized response from an AJAX request. To get the data from the response,
* you will want to read the `response` property.
*
* - DO NOT create instances of this class directly.
* - DO NOT subclass this class.
*
* It is advised not to hold this object in memory, as it has a reference to
* the original XHR used to make the request, as well as properties containing
* request and response data.
*
* @see {@link ajax}
* @see {@link AjaxConfig}
*/
export class AjaxResponse<T> {
/** The HTTP status code */
readonly status: number;
/**
* The response data, if any. Note that this will automatically be converted to the proper type
*/
readonly response: T;
/**
* The responseType set on the request. (For example: `""`, `"arraybuffer"`, `"blob"`, `"document"`, `"json"`, or `"text"`)
* @deprecated There isn't much reason to examine this. It's the same responseType set (or defaulted) on the ajax config.
* If you really need to examine this value, you can check it on the `request` or the `xhr`. Will be removed in v8.
*/
readonly responseType: XMLHttpRequestResponseType;
/**
* The total number of bytes loaded so far. To be used with {@link total} while
* calculating progress. (You will want to set {@link includeDownloadProgress} or
* {@link includeDownloadProgress})
*/
readonly loaded: number;
/**
* The total number of bytes to be loaded. To be used with {@link loaded} while
* calculating progress. (You will want to set {@link includeDownloadProgress} or
* {@link includeDownloadProgress})
*/
readonly total: number;
/**
* A dictionary of the response headers.
*/
readonly responseHeaders: Record<string, string>;
/**
* A normalized response from an AJAX request. To get the data from the response,
* you will want to read the `response` property.
*
* - DO NOT create instances of this class directly.
* - DO NOT subclass this class.
*
* @param originalEvent The original event object from the XHR `onload` event.
* @param xhr The `XMLHttpRequest` object used to make the request. This is useful for examining status code, etc.
* @param request The request settings used to make the HTTP request.
* @param type The type of the event emitted by the {@link ajax} Observable
*/
constructor(
/**
* The original event object from the raw XHR event.
*/
public readonly originalEvent: ProgressEvent,
/**
* The XMLHttpRequest object used to make the request.
* NOTE: It is advised not to hold this in memory, as it will retain references to all of it's event handlers
* and many other things related to the request.
*/
public readonly xhr: XMLHttpRequest,
/**
* The request parameters used to make the HTTP request.
*/
public readonly request: AjaxRequest,
/**
* The event type. This can be used to discern between different events
* if you're using progress events with {@link includeDownloadProgress} or
* {@link includeUploadProgress} settings in {@link AjaxConfig}.
*
* The event type consists of two parts: the {@link AjaxDirection} and the
* the event type. Merged with `_`, they form the `type` string. The
* direction can be an `upload` or a `download` direction, while an event can
* be `loadstart`, `progress` or `load`.
*
* `download_load` is the type of event when download has finished and the
* response is available.
*/
public readonly type: AjaxResponseType = 'download_load'
) {
const { status, responseType } = xhr;
this.status = status ?? 0;
this.responseType = responseType ?? '';
// Parse the response headers in advance for the user. There's really
// not a great way to get all of them. So we need to parse the header string
// we get back. It comes in a simple enough format:
//
// header-name: value here
// content-type: application/json
// other-header-here: some, other, values, or, whatever
const allHeaders = xhr.getAllResponseHeaders();
this.responseHeaders = allHeaders
? // Split the header text into lines
allHeaders.split('\n').reduce((headers: Record<string, string>, line) => {
// Split the lines on the first ": " as
// "key: value". Note that the value could
// technically have a ": " in it.
const index = line.indexOf(': ');
headers[line.slice(0, index)] = line.slice(index + 2);
return headers;
}, {})
: {};
this.response = getXHRResponse(xhr);
const { loaded, total } = originalEvent;
this.loaded = loaded;
this.total = total;
}
}