Secure random token in Node.js
Try crypto.randomBytes(): require(‘crypto’).randomBytes(48, function(err, buffer) { var token = buffer.toString(‘hex’); }); The ‘hex’ encoding works in node v0.6.x or newer.
base64
NodeJS: How to decode base64 encoded string back to binary? [duplicate]
As of Node.js v6.0.0 using the constructor method has been deprecated and the following method should instead be used to construct a new buffer from a base64 encoded string: var b64string = /* whatever */; var buf = Buffer.from(b64string, ‘base64’); // Ta-da For Node.js v5.11.1 and below Construct a new Buffer and pass ‘base64’ as … Read more
How to convert an image to Base64 encoding
I think that it should be: $path=”myfolder/myimage.png”; $type = pathinfo($path, PATHINFO_EXTENSION); $data = file_get_contents($path); $base64 = ‘data:image/’ . $type . ‘;base64,’ . base64_encode($data);
Get image data URL in JavaScript?
Note: This only works if the image is from the same domain as the page, or has the crossOrigin=”anonymous” attribute and the server supports CORS. It’s also not going to give you the original file, but a re-encoded version. If you need the result to be identical to the original, see Kaiido’s answer. You will … Read more
Encoding as Base64 in Java
You need to change the import of your class: import org.apache.commons.codec.binary.Base64; And then change your class to use the Base64 class. Here’s some example code: byte[] encodedBytes = Base64.encodeBase64(“Test”.getBytes()); System.out.println(“encodedBytes ” + new String(encodedBytes)); byte[] decodedBytes = Base64.decodeBase64(encodedBytes); System.out.println(“decodedBytes ” + new String(decodedBytes)); Then read why you shouldn’t use sun.* packages. Update (2016-12-16) You can … Read more
How to Resize a Bitmap in Android?
Change: profileImage.setImageBitmap( BitmapFactory.decodeByteArray(imageAsBytes, 0, imageAsBytes.length) To: Bitmap b = BitmapFactory.decodeByteArray(imageAsBytes, 0, imageAsBytes.length) profileImage.setImageBitmap(Bitmap.createScaledBitmap(b, 120, 120, false));
Why do we use Base64?
Your first mistake is thinking that ASCII encoding and Base64 encoding are interchangeable. They are not. They are used for different purposes. When you encode text in ASCII, you start with a text string and convert it to a sequence of bytes. When you encode data in Base64, you start with a sequence of bytes … Read more
Why does a base64 encoded string have an = sign at the end
Q Does a base64 string always end with =? A: No. (the word usb is base64 encoded into dXNi) Q Why does an = get appended at the end? A: As a short answer: The last character (= sign) is added only as a complement (padding) in the final process of encoding a message with … Read more
Is embedding background image data into CSS as Base64 good or bad practice?
It’s not a good idea when you want your images and style information to be cached separately. Also if you encode a large image or a significant number of images in to your css file it will take the browser longer to download the file leaving your site without any of the style information until … Read more
Decode Base64 data in Java
As of Java 8, there is an officially supported API for Base64 encoding and decoding. In time this will probably become the default choice. The API includes the class java.util.Base64 and its nested classes. It supports three different flavors: basic, URL safe, and MIME. Sample code using the “basic” encoding: import java.util.Base64; byte[] bytes = … Read more