ajax.js
1.93 KB
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
// https://github.com/ElemeFE/element/blob/dev/packages/upload/src/ajax.js
function getError(action, option, xhr) {
const msg = `fail to post ${action} ${xhr.status}'`;
const err = new Error(msg);
err.status = xhr.status;
err.method = 'post';
err.url = 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;
}
}
export default function upload(option) {
if (typeof XMLHttpRequest === 'undefined') {
return;
}
const xhr = new XMLHttpRequest();
const action = option.action;
if (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 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() {
if (xhr.status < 200 || xhr.status >= 300) {
return option.onError(getError(action, option, xhr), getBody(xhr));
}
option.onSuccess(getBody(xhr));
};
xhr.open('post', action, true);
if (option.withCredentials && 'withCredentials' in xhr) {
xhr.withCredentials = true;
}
const headers = option.headers || {};
// if (headers['X-Requested-With'] !== null) {
// xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
// }
for (let item in headers) {
if (headers.hasOwnProperty(item) && headers[item] !== null) {
xhr.setRequestHeader(item, headers[item]);
}
}
xhr.send(formData);
}