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transformFile.js
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transformFile.js
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/* eslint no-console:0 */
import React from 'react';
import ReactDOM from 'react-dom';
import Upload from 'rc-upload';
const uploadProps = {
action: '/upload.do',
multiple: false,
data: { a: 1, b: 2 },
headers: {
Authorization: '$prefix $token',
},
onStart(file) {
console.log('onStart', file, file.name);
},
onSuccess(ret, file) {
console.log('onSuccess', ret, file.name);
},
onError(err) {
console.log('onError', err);
},
onProgress({ percent }, file) {
console.log('onProgress', `${percent}%`, file.name);
},
transformFile(file) {
return new Promise((resolve) => {
const reader = new FileReader();
reader.readAsDataURL(file);
reader.onload = () => {
const canvas = document.createElement('canvas');
const img = document.createElement('img');
img.src = reader.result;
img.onload = () => {
const ctx = canvas.getContext('2d');
ctx.drawImage(img, 0, 0);
canvas.toBlob(resolve);
};
};
});
},
};
const Test = () => {
return (
<div
style={{
margin: 100,
}}
>
<div>
<Upload {...uploadProps}>
<button>开始上传</button>
</Upload>
</div>
</div>
);
};
ReactDOM.render(<Test />, document.getElementById('__react-content'));