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144 lines
5.5 KiB
144 lines
5.5 KiB
5 months ago
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<!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>Form 表单简单上传</title>
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<style>h1, h2 {font-weight: normal;}#msg {margin-top:10px;}</style>
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</head>
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<body>
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<h1>PostObject 上传（Policy 保护，Form 表单上传）</h1>
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<div>最低兼容到 IE6 上传，使用 policy 签名保护，不支持 onprogress</div>
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<form id="form" target="submitTarget" action="" method="post" enctype="multipart/form-data" accept="*/*">
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<input id="fileSelector" name="file" type="file">
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<input id="submitBtn" type="button" value="提交">
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</form>
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<iframe id="submitTarget" name="submitTarget" style="display:none;" frameborder="0"></iframe>
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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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var fileSelector = document.getElementById('fileSelector');
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var form = document.getElementById('form');
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form.action = prefix;
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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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// 监听上传完成
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var Key;
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var submitTarget = document.getElementById('submitTarget');
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var showMessage = 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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submitTarget.onload = function () {
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var search;
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try {
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search = submitTarget.contentWindow.location.search.substr(1);
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} catch (e) {
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showMessage('文件 ' + Key + ' 上传失败');
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}
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if (search) {
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var items = search.split('&');
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var i, arr, data = {};
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for (i = 0; i < items.length; i++) {
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arr = items[i].split('=');
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data[arr[0]] = decodeURIComponent(arr[1] || '');
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}
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showMessage(null, {url: prefix + camSafeUrlEncode(Key).replace(/%2F/g, '/'), ETag: data.etag});
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} else {
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}
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};
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var setFormField = function (key, value) {
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var el = document.getElementById(key);
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if (!el) {
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el = document.createElement('input');
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el.hidden = true;
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el.id = key;
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el.name = key;
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form.insertBefore(el, fileSelector);
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}
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el.setAttribute('value', value); // 需要保证 file 在表单最后
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el.value = value;
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};
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// 发起上传
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document.getElementById('submitBtn').onclick = function (e) {
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var filePath = document.getElementById('fileSelector').value;
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if (!filePath) {
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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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Key = 'dir/' + filePath.match(/[\\\/]?([^\\\/]+)$/)[1]; // 这里指定上传目录和文件名
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// 获取签名保护字段
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getPostPolicyCredentials({
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Key: Key,
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}, function (err, credentials) {
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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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setFormField('success_action_redirect', location.href.substr(0, location.href.lastIndexOf('/') + 1) + 'empty.html');
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setFormField('key', Key);
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// 使用 policy 签名保护格式
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credentials.securityToken && setFormField('x-cos-security-token', credentials.securityToken);
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setFormField('q-sign-algorithm', credentials.qSignAlgorithm);
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setFormField('q-ak', credentials.qAk);
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setFormField('q-key-time', credentials.qKeyTime);
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setFormField('q-signature', credentials.qSignature);
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setFormField('policy', credentials.policy);
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// 提交表单
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form.submit();
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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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