11/3/2023 0 Comments Decode base64 nodejsIf 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. const requestBodyObject JSON.parse (decodedRequestBodyString.toString ()) Share. To transform that buffer instance into a string that can be used in JSON.parse the code needs to invoke Buffer.toString first to make it work. Here is what it looks like: // Base64 encoded string const base64 = 'QmFzZTY0IEVuY29kaW5nIGluIE5vZGUuanM=' // create a buffer const buff = Buffer. The result from om is an instance of 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. 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 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 Node.js, theres no inverse of Buffer.toString instead, you pass the base64 data directly to. In the above example, we created a buffer from the string and used the toString() method to decode the buffer as a Base64 string. Decoding binary data from a base64 string using Node.js. Then we input the Base64 string, which we’ll store in a constant base64String. We first import Buffer into our file using require (). log (base64 ) // QmFzZTY0IEVuY29kaW5nIGluIE5vZGUuanM= Base64 Decoding in Node.js To decode a Base64 encoded string to its original input string, we can just reverse the above process while using the same Buffer package. 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. These methods are part of the window object and are only available in the browser. 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. Let base64Dec = binaryData.In an earlier article, we looked at how to Base64 encode and decode a string in Java and JavaScript. This buffer can then be decoded into a UTF8 string. To decode a base64 string, we need to create a buffer from the given base64 string. Mostly we deal with UFT8 strings, but any other encoding as be specified as well. Note that the encoding of the string can also be set in the om method. Let base64Data = binaryData.toString("base64") ![]() This buffer can then be decoded as base64. To convert a string to base64, we need to create a buffer from the given string. toString() method can then be used on this buffer object to decode it as required. The om() method can create a buffer (binary data) from a given string in a specified encoding. The Buffer class can be used to manipulate streams of binary data in Node. This module is loaded by default, hence no import is required. Node.js does not support the standard Javascript methods of atob() and btoa() for base64 conversions.īase64 encoding and decoding can be done in Node.js using the Buffer module. ![]() Encoding and decoding base64 data in Node.js can be done using the Buffer module.
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