工作示例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Document</title>
</head>
<body>
<input type="file" name="" id="file" />
<button id="send">发送js生成的图片</button>
<script src="https://unpkg.com/axios/dist/axios.min.js"></script>
<script src="https://unpkg.com/p5@0.7.2/lib/p5.min.js"></script>
<script src="https://unpkg.com/p5@0.7.2/lib/addons/p5.dom.min.js"></script>
<script>
let canvas;
function setup() {
canvas = createCanvas(500, 400);
background(0, 100, 200);
fill(random(255), random(255), random(255));
noStroke();
ellipse(width / 2, height / 2, 40, 40);
}
// 手工上传图片
document.getElementById('file').onchange = function(e) {
const files = e.target.files;
const firstFile = files[0];
const data = new FormData();
data.append('smfile', firstFile, '[anime]' + firstFile.name);
send(data);
};
// 使用canvas保存的base64，转化为blob使用FormData上传
document.getElementById('send').onclick = function(e) {
const contentType = 'image/png';
const dataURL = canvas.elt
.toDataURL(contentType)
.replace(/data:image/png;base64\,/, '');
const byteCharacters = atob(dataURL);
// 这里使用DataView代替下面注释的Uint8Array
let buffer = new ArrayBuffer(byteCharacters.length);
let view = new DataView(buffer);
for (let i = 0; i < byteCharacters.length; i++) {
view.setUint8(i, byteCharacters.charCodeAt(i));
}
const blob = new Blob([buffer], {type: contentType});
// const byteNumbers = new Array(byteCharacters.length);
// for (let i = 0; i < byteCharacters.length; i++) {
// byteNumbers[i] = byteCharacters.charCodeAt(i);
// }
// const byteArray = new Uint8Array(byteNumbers);
// const blob = new Blob([byteArray], {type: contentType});
const data = new FormData();
data.append('smfile', blob, '[anime]new.png');
send(data);
};
function send(data) {
axios
.post('https://sm.ms/api/v2/upload', data)
.then(function(response) {
console.log(response);
})
.catch(function(error) {
console.log(error);
});
}
</script>
</body>
</html>
