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feat: send events when user leaves the page (#1146)
* feat: send events when user leaves the page * chore: add tests for fetch * chore: fix flaky tests * chore: observe page visibility when initialising * chore: set limit to 60 KiB * chore: describe reason behind the unobserve * chore: use existing constants for services * chore: change global state restore strategy * chore: do not process calls to agent endpoints * chore: improve keepalive check * chore: avoid executing keepalive if beforeSend defined * chore: move variables inside function * chore: use customEvent util * chore: remove needless spy
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| /** | ||
| * MIT License | ||
| * | ||
| * Copyright (c) 2017-present, Elasticsearch BV | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in | ||
| * all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| * THE SOFTWARE. | ||
| * | ||
| */ | ||
|
|
||
| import { HTTP_REQUEST_TIMEOUT } from '../constants' | ||
| import { isResponseSuccessful } from './response-status' | ||
|
|
||
| // keepalive flag tends to limit the payload size to 64 KB | ||
| // although this size if set, will be up to the user agent | ||
| // in order to be conservative we set a limit a little lower than that | ||
| export const BYTE_LIMIT = 60 * 1000 | ||
|
|
||
| export function shouldUseFetchWithKeepAlive(method, payload) { | ||
| if (!isFetchSupported()) { | ||
| return false | ||
| } | ||
|
|
||
| const isKeepAliveSupported = 'keepalive' in new Request('') | ||
| if (!isKeepAliveSupported) { | ||
| return false | ||
| } | ||
|
|
||
| const size = calculateSize(payload) | ||
| return method === 'POST' && size < BYTE_LIMIT | ||
| } | ||
|
|
||
| export function sendFetchRequest( | ||
| method, | ||
| url, | ||
| { keepalive = false, timeout = HTTP_REQUEST_TIMEOUT, payload, headers } | ||
| ) { | ||
| let timeoutConfig = {} | ||
| if (typeof AbortController === 'function') { | ||
| const controller = new AbortController() | ||
| timeoutConfig.signal = controller.signal | ||
| setTimeout(() => controller.abort(), timeout) | ||
| } | ||
|
|
||
| let fetchResponse | ||
| return window | ||
| .fetch(url, { | ||
| body: payload, | ||
| headers, | ||
| method, | ||
| keepalive, // used to allow the request to outlive the page. | ||
| credentials: 'omit', | ||
| ...timeoutConfig | ||
| }) | ||
| .then(response => { | ||
| fetchResponse = response | ||
| return fetchResponse.text() | ||
| }) | ||
| .then(responseText => { | ||
| const bodyResponse = { | ||
| url, | ||
| status: fetchResponse.status, | ||
| responseText | ||
| } | ||
|
|
||
| if (!isResponseSuccessful(fetchResponse.status)) { | ||
| throw bodyResponse | ||
| } | ||
|
|
||
| return bodyResponse | ||
| }) | ||
| } | ||
|
|
||
| export function isFetchSupported() { | ||
| return ( | ||
| typeof window.fetch === 'function' && typeof window.Request === 'function' | ||
| ) | ||
| } | ||
|
|
||
| function calculateSize(payload) { | ||
| if (!payload) { | ||
| // IE 11 cannot create Blob from undefined | ||
| return 0 | ||
| } | ||
|
|
||
| // If the payload is compressed it is going to be already a Blob | ||
| if (payload instanceof Blob) { | ||
| return payload.size | ||
| } | ||
|
|
||
| return new Blob([payload]).size | ||
| } |
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