ant-design-vue/components/vc-upload/src/request.js

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2018-04-11 15:17:34 +08:00
function getError (option, xhr) {
const msg = `cannot post ${option.action} ${xhr.status}'`
const err = new Error(msg)
err.status = xhr.status
err.method = 'post'
err.url = option.action
return err
}
function getBody (xhr) {
const text = xhr.responseText || xhr.response
if (!text) {
return text
}
try {
return JSON.parse(text)
} catch (e) {
return text
}
}
// option {
// onProgress: (event: { percent: number }): void,
// onError: (event: Error, body?: Object): void,
// onSuccess: (body: Object): void,
// data: Object,
// filename: String,
// file: File,
// withCredentials: Boolean,
// action: String,
// headers: Object,
// }
export default function upload (option) {
const xhr = new window.XMLHttpRequest()
if (option.onProgress && xhr.upload) {
xhr.upload.onprogress = function progress (e) {
if (e.total > 0) {
e.percent = e.loaded / e.total * 100
}
option.onProgress(e)
}
}
const formData = new window.FormData()
if (option.data) {
Object.keys(option.data).map(key => {
formData.append(key, option.data[key])
})
}
formData.append(option.filename, option.file)
xhr.onerror = function error (e) {
option.onError(e)
}
xhr.onload = function onload () {
// allow success when 2xx status
// see https://github.com/react-component/upload/issues/34
if (xhr.status < 200 || xhr.status >= 300) {
return option.onError(getError(option, xhr), getBody(xhr))
}
option.onSuccess(getBody(xhr), xhr)
}
xhr.open('post', option.action, true)
// Has to be after `.open()`. See https://github.com/enyo/dropzone/issues/179
if (option.withCredentials && 'withCredentials' in xhr) {
xhr.withCredentials = true
}
const headers = option.headers || {}
// when set headers['X-Requested-With'] = null , can close default XHR header
// see https://github.com/react-component/upload/issues/33
if (headers['X-Requested-With'] !== null) {
xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest')
}
for (const h in headers) {
if (headers.hasOwnProperty(h) && headers[h] !== null) {
xhr.setRequestHeader(h, headers[h])
}
}
xhr.send(formData)
return {
abort () {
xhr.abort()
},
}
}