If you want to learn more about Base64 conversions in JavaScript, read this guide. You can even use it to perform ASCII, HEX, UTF-16, and UCS2 encodings and decodings. The Buffer object is not just limited to Base64 conversions. We looked at how to use the native Buffer module to perform the Base64 encoding and decoding in a Node.js application. That's all for Base64 encoding and decoding in Node.js. log (str ) // Base64 Encoding in Node.js Conclusion toString ( 'utf-8' ) // print normal stringĬonsole. from (base64, 'base64' ) // decode buffer as UTF-8 const str = buff. Here is what it looks like: // Base64 encoded string const base64 = 'QmFzZTY0IEVuY29kaW5nIGluIE5vZGUuanM=' // create a buffer const buff = Buffer. ![]() All you need to do is create a buffer from the Base64 encoding string by using base64 as the second parameter to om() and then decode it to the UTF-8 string by using the toString() method. The Base64 decoding process is very much similar to the encoding process. The second parameter in om() is optional when dealing with plain-text (UTF-8) strings. In the above example, we created a buffer from the string and used the toString() method to decode the buffer as a Base64 string. log (base64 ) // QmFzZTY0IEVuY29kaW5nIGluIE5vZGUuanM= toString ( 'base64' ) // print Base64 stringĬonsole. from (str, 'utf-8' ) // decode buffer as Base64 const base64 = buff. Here is an example: // plain-text string const str = 'Base64 Encoding in Node.js' // create a buffer const buff = Buffer. If no character encoding is specified, UTF-8 will be used as the default. This method takes two parameters, a plain-text string, and the character encoding, and creates a buffer or binary data array for the given encoding. To convert a string into a Base64 encoded string, we first create a buffer from the given string using the om() method. Let us look at the below examples that explain how to use the Buffer object to perform Base64 encoding and decoding in a Node.js application. This includes to and from UTF-8, UCS2, Base64, ASCII, UTF-16, and even the HEX encoding scheme. The Buffer object provides several methods to perform different encoding and decoding conversions. Internally, Buffer represents binary data in the form of a sequence of bytes. Buffer is available as a global object, and you don't need to explicitly require this module in your application. Luckily, Node.js provides a native Buffer module that can be used to perform Base64 encoding and decoding. It decodes all escape sequences, including those that are not created by encodeURIComponent, like -.' (). decodeURIComponent () uses the same decoding algorithm as described in decodeURI (). A tiny library for decode value of the query string using c with utf8 support and html entities. These methods are part of the window object and are only available in the browser. decodeURIComponent () is a function property of the global object. Unfortunately, Node.js doesn't support standard JavaScript functions like atob() and btoa() for Base64 encoding. Today, you'll learn how to do the Base64 encoding and decoding in a Node.js application. Generally, there should be no reason to use this encoding, as 'utf8' (or, if the data is known to always be ASCII-only, 'latin1') will be a better choice when encoding or decoding ASCII-only text. const buf1 = Buffer.In an earlier article, we looked at how to Base64 encode and decode a string in Java and JavaScript. When decoding a Buffer into a string, using this encoding will additionally unset the highest bit of each byte before decoding as 'latin1'. Creates a zero-filled Buffer of length 10. Recommended to explicitly reference it via an import or require statement. While the Buffer class is available within the global scope, it is still Plain Uint8Arrays wherever Buffers are supported as well. ![]() The Buffer class is a subclass of JavaScript's Uint8Array class andĮxtends it with methods that cover additional use cases. What makes Buffer.allocUnsafe() and Buffer.allocUnsafeSlow() "unsafe"?īuffer objects are used to represent a fixed-length sequence of bytes.The -zero-fill-buffers command-line option.om(), Buffer.alloc(), and Buffer.allocUnsafe().Check my full Axios tutorial if you are not familiar with it. buf.writeUIntLE(value, offset, byteLength) npm install qs Then we need to import the qs module along with the Axios import, of course: const qs require('qs') const axios require('axios') If you use ES Modules, use import qs from 'qs' import axios from 'axios' Next, the Axios code.buf.writeUIntBE(value, offset, byteLength).buf.writeIntLE(value, offset, byteLength).buf.writeIntBE(value, offset, byteLength).Static method: Buffer.isEncoding(encoding).Static method: Buffer.allocUnsafeSlow(size). ![]()
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