Node.js Buffer.readUInt32BE() Method

In this article, we will discuss the Node.js Buffer.readUInt32BE()< method with their syntax, parameters, and examples.

What is the Node.js Buffer.readUInt32BE() Method?

The Buffer.readUInt32BE() method is used to read the unsigned 32-bit integer from a buffer. It reads the Buffer in big-endian format, reading from left to right, starting from the most significant byte.

Syntax:

It has the following syntax:

• The "buf" is an object that represent the buffer.
• The "offsert" is an integer thatrepresents the index within the buffer where the integer starts. The default value of the offset is zero.
• The "noAssert" is a boolean value. If the boolean value is true, it disables the bounds checking, which increases performance. Its default value is false.

This function will return an unsigned 32-bit integer value read from the buffer.

Some of the fields where this method is used are:

• Network communication
• Reading and parsing files
• Data serialization
• Used in embedded systems
• Security and cryptography

Example 1:

Let us take an example to illustrate the Node.js Buffer.readUInt32BE() method.

Output:

Explanation:

In this program, first of all the buffer module is imported. Next, created a buffer with some hexadecimal values and it is stored in the variable named "buf". After that, the readUInt32Be() method is used to read the buffer and stored in the variable named value. Now, value is displayed to the console.

Example 2:

Let us take another example program to illustrate the readUInt32Be() method:

Output:

Explanation:

In this program, the "fs" and "path" modules are first imported. In the main function, the file path to the binary file is declared and initialized with the name data and with the extension .bin. The file path is stored in a variable named "file path", and then a buffer is created and stored in a variable named "data". This binary data is written into the binary file by using the "create binary file ()" function. This function takes filepath and data as parameters, and it uses the "fs" module to write the data into the binary file. After writing the binary data into the file, it displays the message saying, "Binary file created successfully".

Another function named "readUInt32BeFromFile()" is used to read the binary file. This function takes a file path and offsets as parameters. In this function, the "readUInt32BE()" function is used to read the data from the file and store it in the variable named value. After that, the value is displayed. This function is called from the main function.

Conclusion:

In conclusion, this article provides a detailed explanation and usage of the "Buffer.readUInt32BE()" method in Node.js. These two example programs explain the method in detail. One program is a simple demonstration of using the method. The second example program first creates a binary file and stores some binary data in it. After the successful creation of the file, the "readUInt32BE()" method is used to read the binary file.