Read a file to bytes

The fs.read function is used to read a file and return a std.io.Bytes. The first argument is the file path.

To read the std.io.Bytes to a UTF-8 string, you can use the to_string method.

WARNING

The valid UTF-8 bytes will be converted to string, and invalid UTF-8 bytes, it will be replaced with U+FFFD, e.g. �

Or use encode_to_string method to convert to a string with a specific encoding.

Navi Code

use std.fs;

fn main() throws {
    let buf = try fs.read("path/to/file.txt");
    // buf is a std.io.Bytes

    // Convert buf to UTF-8 string
    let content = buf.to_string();

    // Encode buf to HEX string
    let hex = try buf.encode_to_string("hex");

    // Encode buf to Base64 string
    let base64 = try buf.encode_to_string("base64");

    // Encode buf to Base64URL string
    let base64url = try buf.encode_to_string("base64url");
}