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137 lines
5.0 KiB
137 lines
5.0 KiB
<!doctype html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Ajax Post 上传</title>
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<style>
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h1, h2 {
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font-weight: normal;
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}
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#msg {
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margin-top: 10px;
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}
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</style>
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</head>
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<body>
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<h1>PostObject 上传（Policy 保护，Ajax POST 请求）</h1>
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<input id="fileSelector" type="file">
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<input id="submitBtn" type="submit">
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<div id="msg"></div>
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<script src="common/cos-auth.min.js"></script>
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<script>
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(function () {
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// 请求用到的参数
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var Bucket = 'test-1250000000';
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var Region = 'ap-guangzhou';
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var protocol = location.protocol === 'https:' ? 'https:' : 'http:';
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var prefix = protocol + '//' + Bucket + '.cos.' + Region + '.myqcloud.com/';
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// 对更多字符编码的 url encode 格式
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var camSafeUrlEncode = function (str) {
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return encodeURIComponent(str)
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.replace(/!/g, '%21')
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.replace(/'/g, '%27')
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.replace(/\(/g, '%28')
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.replace(/\)/g, '%29')
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.replace(/\*/g, '%2A');
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};
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// 获取权限策略
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var getPostPolicyCredentials = function (opt, callback) {
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var url = 'http://127.0.0.1:3000/post-policy?key=' + encodeURIComponent(opt.Key);
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var xhr = new XMLHttpRequest();
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xhr.open('GET', url, true);
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xhr.onreadystatechange = function (e) {
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if (xhr.readyState === 4) {
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if (xhr.status === 200) {
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var credentials;
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try {
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credentials = (new Function('return ' + xhr.responseText))();
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} catch (e) {}
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if (credentials) {
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callback(null, credentials);
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} else {
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console.error(xhr.responseText);
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callback('获取签名出错');
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}
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} else {
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callback('获取签名出错');
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}
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}
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};
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xhr.send();
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};
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// 上传文件
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var uploadFile = function (file, callback) {
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var Key = 'dir/' + file.name; // 这里指定上传目录和文件名
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getPostPolicyCredentials({
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Bucket: Bucket,
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Key: Key,
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ACL: 'default'
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}, function (err, credentials) {
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var fd = new FormData();
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// 在当前目录下放一个空的 empty.html 以便让接口上传完成跳转回来
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fd.append('key', Key);
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// // 使用普通签名格式
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// fd.append('Signature', credentials.Authorization);
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// fd.append('x-cos-security-token', credentials.XCosSecurityToken || '');
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// 使用 policy 签名保护格式
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credentials.securityToken && fd.append('x-cos-security-token', credentials.securityToken);
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fd.append('q-sign-algorithm', credentials.qSignAlgorithm);
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fd.append('q-ak', credentials.qAk);
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fd.append('q-key-time', credentials.qKeyTime);
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fd.append('q-signature', credentials.qSignature);
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fd.append('policy', credentials.policy);
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// 文件内容
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fd.append('file', file);
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// xhr
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var url = prefix;
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var xhr = new XMLHttpRequest();
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xhr.open('POST', url, true);
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xhr.upload.onprogress = function (e) {
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console.log('上传进度 ' + (Math.round(e.loaded / e.total * 10000) / 100) + '%');
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};
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xhr.onload = function () {
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if (Math.floor(xhr.status / 100) === 2) {
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var ETag = xhr.getResponseHeader('etag');
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callback(null, {url: prefix + camSafeUrlEncode(Key).replace(/%2F/g, '/'), ETag: ETag});
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} else {
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callback('文件 ' + Key + ' 上传失败，状态码：' + xhr.status);
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}
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};
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xhr.onerror = function () {
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callback('文件 ' + Key + ' 上传失败，请检查是否没配置 CORS 跨域规则');
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};
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xhr.send(fd);
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});
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};
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// 监听表单提交
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document.getElementById('submitBtn').onclick = function (e) {
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var file = document.getElementById('fileSelector').files[0];
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if (!file) {
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document.getElementById('msg').innerText = '未选择上传文件';
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return;
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}
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file && uploadFile(file, function (err, data) {
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console.log(err || data);
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document.getElementById('msg').innerText = err ? err : ('上传成功，ETag=' + data.ETag);
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});
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};
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})();
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</script>
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</body>
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</html>
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