Signed-OSS-URL.md

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+
+Signed OSS URL in Javascript:
+```javascript
+var generateSignedURL = (endpoint, accessKeyId, accessKeySecret, bucketName, key, expiresInSeconds, isHTTP) => {
+    var sb = [];
+    sb.push(isHTTP ? 'http://' : 'https://'); // default HTTPS
+    sb.push(bucketName);
+    sb.push('.' + endpoint);
+    sb.push('/' + key);
+    var expires = parseInt($$.date().millis() / 1000) + expiresInSeconds;
+    sb.push('?Expires=' + expires);
+    sb.push('&OSSAccessKeyId=' + URLEncoder.encode(accessKeyId, 'UTF-8'));
+    sb.push('&Signature=' + URLEncoder.encode(sign(accessKeySecret, expires, bucketName, key), 'UTF-8'));
+    return sb.join('');
+};
+```