js断点续传如何做,求实例代码
看“[url]https://help.aliyun.com/document_detail/oss/sdk/javascript-sdk/put-object.html?spm=5176.docoss/sdk/javascript-sdk/put-object.6.320.6PHh7T
版权声明:本文内容由阿里云实名注册用户自发贡献,版权归原作者所有,阿里云开发者社区不拥有其著作权,亦不承担相应法律责任。具体规则请查看《阿里云开发者社区用户服务协议》和《阿里云开发者社区知识产权保护指引》。如果您发现本社区中有涉嫌抄袭的内容,填写侵权投诉表单进行举报,一经查实,本社区将立刻删除涉嫌侵权内容。
用户希望了解如何在JavaScript中实现文件的断点续传上传功能,并请求提供实例代码。
以下是一个使用阿里云OSS Browser.js SDK在浏览器环境中实现断点续传上传的示例代码:
<!DOCTYPE html>
<html>
<head>
<script src="https://oss-cdn.aliyuncs.com/aliyun-oss-sdk.min.js"></script>
</head>
<body>
<button id="submit">上传</button>
<button id="pause">暂停</button>
<button id="resume">恢复上传</button>
<script>
const client = new OSS.Wrapper({
region: 'yourRegion',
authorizationV4: true,
accessKeyId: 'yourAccessKeyId',
accessKeySecret: 'yourAccessKeySecret',
stsToken: 'yourSecurityToken',
bucket: 'examplebucket'
});
// 生成用于测试的文件内容
const fileContent = Array(1024 * 1024 * 100).fill("a").join("");
const file = new File([fileContent], "multipart-upload-file");
const name = "test.txt";
let abortCheckpoint;
document.getElementById("submit").addEventListener("click", () => {
client.multipartUpload(name, file, {
progress: (p, cpt) => {
abortCheckpoint = cpt;
console.log(p * 100);
}
}).then((r) => console.log(r));
});
document.getElementById("pause").addEventListener("click", () => {
client.cancel();
});
async function resumeUpload() {
try {
const result = await client.multipartUpload(name, file, {
checkpoint: abortCheckpoint,
progress: (p, cpt) => {
abortCheckpoint = cpt;
console.log(p);
}
});
console.log(result);
} catch (e) {
console.log(e);
}
}
document.getElementById("resume").addEventListener("click", async () => {
await resumeUpload();
});
</script>
</body>
</html>
在Node.js环境下,可以使用ali-oss库来实现断点续传上传。以下是一个示例代码:
const OSS = require('ali-oss');
async function resumeUpload(client, filePath, objectName) {
let checkpoint;
for (let i = 0; i < 5; i++) {
try {
const result = await client.multipartUpload(objectName, filePath, {
checkpoint,
async progress(percentage, cpt) {
checkpoint = cpt;
}
});
console.log(result);
break;
} catch (e) {
console.log(e);
}
}
}
const client = new OSS({
region: 'yourregion',
accessKeyId: process.env.OSS_ACCESS_KEY_ID,
accessKeySecret: process.env.OSS_ACCESS_KEY_SECRET,
bucket: 'examplebucket'
});
const filePath = "yourfilepath";
resumeUpload(client, filePath, 'object-name');
'yourRegion'
, 'yourAccessKeyId'
, 'yourAccessKeySecret'
, 'yourSecurityToken'
, 'examplebucket'
, 'test.txt'
, 'yourfilepath'
, 和 'object-name'
等占位符为实际值。通过上述示例,您可以根据具体应用场景(浏览器或Node.js环境)选择合适的代码进行断点续传上传的实现。