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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 | import Observable from './observable.js'
export default class HttpFetch extends Observable {
constructor(requestHeaders = {}) {
super()
this.requestHeaders = requestHeaders
}
async _httpFetch(url, body, verb) {
const myHeaders = new Headers()
if (typeof this.requestHeaders === 'object') {
Object.entries(this.requestHeaders).forEach(([key, value]) => {
myHeaders.set(key, value)
})
}
let myInit = { cache: 'default', method: verb, mode: 'cors' }
myInit.body = body
if (body && !(body instanceof FormData)) {
myInit.body = JSON.stringify(body)
myHeaders.set('Content-Type', 'application/json')
}
myInit.headers = myHeaders
try {
const response = await fetch(url, myInit)
const responseText = await response.clone().text()
const json = responseText.length ? JSON.parse(responseText) : {}
if (response.ok) {
this.notify(json)
} else {
this.notifyError(response)
}
} catch (error) {
this.notifyError(error)
}
}
static addParamsToURL(url, params = {}) {
let result = url
try {
const pathURL = new URL(url)
const searchParams = pathURL.searchParams
Object.entries(params)
.map(param => param.map(window.encodeURIComponent))
.forEach(([key, value]) => {
if (!searchParams.has(key)) {
searchParams.append(key, value)
}
})
result = `${pathURL.origin}${pathURL.pathname}?${searchParams.toString()}`
} catch (error) {
result = url
}
return result
}
generateUrlParams(params = {}) {
return `?${Object.entries(params).map(param => param.map(window.encodeURIComponent).join('=')).join('&')}`
}
get(url, params = null) {
if (params) {
url = this.constructor.addParamsToURL(url, params)
}
return {
subscribe: f => {
const unsubscribe = this.subscribe.call(this, f)
this._httpFetch(url, null, 'GET')
return unsubscribe
}
}
}
post(url, body) {
return {
subscribe: f => {
const unsubscribe = this.subscribe.call(this, f)
this._httpFetch(url, body, 'POST')
return unsubscribe
}
}
}
put(url, body) {
return {
subscribe: f => {
const unsubscribe = this.subscribe.call(this, f)
this._httpFetch(url, body, 'PUT')
return unsubscribe
}
}
}
delete(url) {
return {
subscribe: f => {
const unsubscribe = this.subscribe.call(this, f)
this._httpFetch(url, null, 'DELETE')
return unsubscribe
}
}
}
}
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