<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Ajax Put 上传</title>
<style>
h1, h2 {
font-weight: normal;
}
#msg {
margin-top: 10px;
}
</style>
</head>
<body>
<h1>Ajax Put 上传</h1>
<input id="fileSelector" type="file">
<input id="submitBtn" type="submit">
<div id="msg"></div>
<script src="common/cos-auth.min.js"></script>
<script>
(function () {
// 请求用到的参数
var Bucket = 'test-1250000000';
var Region = 'ap-guangzhou';
var protocol = location.protocol === 'https:' ? 'https:' : 'http:';
var prefix = protocol + '//' + Bucket + '.cos.' + Region + '.myqcloud.com/';
// 对更多字符编码的 url encode 格式
var camSafeUrlEncode = function (str) {
return encodeURIComponent(str)
.replace(/!/g, '%21')
.replace(/'/g, '%27')
.replace(/\(/g, '%28')
.replace(/\)/g, '%29')
.replace(/\*/g, '%2A');
};
// 计算签名
var getKeyAndAuth = function (options, callback) {
var url = 'http://127.0.0.1:3000/sts-server-key';
var xhr = new XMLHttpRequest();
xhr.open('GET', url, true);
xhr.onload = function (e) {
var result, credentials;
try {
result = (new Function('return ' + xhr.responseText))();
credentials = result.credentials;
} catch (e) {}
if (result && credentials) {
callback(null, {
Key: result.Key, // 这里在后端加一个字段决定上传的文件名
SecurityToken: credentials.sessionToken,
Authorization: CosAuth({
SecretId: credentials.tmpSecretId,
SecretKey: credentials.tmpSecretKey,
Method: options.Method,
Pathname: '/' + options.Key,
}),
});
} else {
console.error(xhr.responseText);
callback('获取签名出错');
}
};
xhr.onerror = function (e) {
callback('获取签名出错');
};
xhr.send();
};
// 上传文件
var uploadFile = function (file, callback) {
getKeyAndAuth({Method: 'PUT', FileName: file.name}, function (err, info) {
var Key = info.Key;
if (err) {
alert(err);
return;
}
var auth = info.Authorization;
var SecurityToken = info.SecurityToken;
var url = prefix + camSafeUrlEncode(Key).replace(/%2F/g, '/');
var xhr = new XMLHttpRequest();
xhr.open('PUT', url, true);
xhr.setRequestHeader('Authorization', auth);
SecurityToken && xhr.setRequestHeader('x-cos-security-token', SecurityToken);
xhr.upload.onprogress = function (e) {
console.log('上传进度 ' + (Math.round(e.loaded / e.total * 10000) / 100) + '%');
};
xhr.onload = function () {
if (xhr.status === 200 || xhr.status === 206) {
var ETag = xhr.getResponseHeader('etag');
callback(null, {url: url, ETag: ETag});
} else {
callback('文件 ' + Key + ' 上传失败，状态码：' + xhr.status);
}
};
xhr.onerror = function () {
callback('文件 ' + Key + ' 上传失败，请检查是否没配置 CORS 跨域规则');
};
xhr.send(file);
});
};
// 监听表单提交
document.getElementById('submitBtn').onclick = function (e) {
var file = document.getElementById('fileSelector').files[0];
if (!file) {
document.getElementById('msg').innerText = '未选择上传文件';
return;
}
file && uploadFile(file, function (err, data) {
console.log(err || data);
document.getElementById('msg').innerText = err ? err : ('上传成功，ETag=' + data.ETag);
});
};
})();
</script>
</body>
</html>