61 lines
1.7 KiB
JavaScript
61 lines
1.7 KiB
JavaScript
'use strict'
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const { makeRequest } = require('../fetch/request')
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/**
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* Checks if the given value is a valid LastEventId.
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* @param {string} value
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* @returns {boolean}
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*/
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function isValidLastEventId (value) {
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// LastEventId should not contain U+0000 NULL
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return value.indexOf('\u0000') === -1
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}
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/**
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* Checks if the given value is a base 10 digit.
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* @param {string} value
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* @returns {boolean}
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*/
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function isASCIINumber (value) {
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if (value.length === 0) return false
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for (let i = 0; i < value.length; i++) {
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if (value.charCodeAt(i) < 0x30 || value.charCodeAt(i) > 0x39) return false
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}
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return true
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}
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function createPotentialCORSRequest (url, destination, corsAttributeState, sameOriginFallback) {
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// 1. Let mode be "no-cors" if corsAttributeState is No CORS, and "cors" otherwise.
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let mode = corsAttributeState === 'no cors' ? 'no-cors' : 'cors'
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// 2. If same-origin fallback flag is set and mode is "no-cors", set mode to "same-origin".
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if (sameOriginFallback && mode === 'no-cors') {
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mode = 'same-origin'
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}
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// 3. Let credentialsMode be "include".
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let credentialsMode = 'include'
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// 4. If corsAttributeState is Anonymous, set credentialsMode to "same-origin".
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if (corsAttributeState === 'anonymous') {
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credentialsMode = 'same-origin'
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}
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// 5. Return a new request whose URL is url, destination is destination, mode is mode,
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// credentials mode is credentialsMode, and whose use-URL-credentials flag is set.
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return makeRequest({
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urlList: [url],
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destination,
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mode,
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credentials: credentialsMode,
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useURLCredentials: true
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})
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}
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module.exports = {
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isValidLastEventId,
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isASCIINumber,
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createPotentialCORSRequest
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}
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