Base64 file uploads
How to encode files as Base 64 encoded strings in several languages
Uploading files to APIs like MailSlurp's typically involves sending a file as a base64 encoded string to a server as the text/plain body of an HTTP POST request. Converting a file to a base64 string means reading a file into a byte array and then encoding the byte array into a string using base64 encoding.
Here are different ways to convert a file to base64 in several common languages.
Node JS
To convert a file to Base64 string in Node:
import fs from 'fs';
// convert file
const base64String = fs.readFileSync('path/to/file', 'base64');
// or convert a string
const fromString = new Buffer('file-content').toString('base64');
Java
To convert a file to Base64 string in Java 8+:
import java.util.Base64;
import java.nio.file.Files;
public String getFileAsBase64String(File file) {
byte[] bytes= Files.readAllBytes(file.toPath());
return Base64.getEncoder().encodeToString(bytes);
}
Golang
To convert a file to Base64 string in Golang:
package main
import (
"bufio"
"encoding/base64"
"io/ioutil"
"os"
)
func main() {
f, _ := os.Open("path/to/file")
reader := bufio.NewReader(f)
content, _ := ioutil.ReadAll(reader)
base64String := base64.StdEncoding.EncodeToString(content)
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