Add support for windows-1252 character encoding

[codyebberson]

iconv-lite supports windows-1252 and is already in the dependency tree for nodemailer: https://www.npmjs.com/package/iconv-lite

Create Middleware for Encoding Conversion

You need to create a middleware that checks the Content-Type of the response and converts the content to CP1252 if required.

const iconv = require('iconv-lite');

function cp1252Middleware(req, res, next) {
    const originalSend = res.send;

    res.send = function (data) {
        if (res.getHeader('Content-Type') === 'text/plain; charset=windows-1252') {
            if (typeof data === 'string') {
                data = iconv.encode(data, 'cp1252');
                // Set the correct Content-Length for the encoded data
                res.setHeader('Content-Length', Buffer.byteLength(data));
            }
        }
        
        originalSend.apply(res, [data]);
    };

    next();
}

Use the Middleware in Your Express Application

You must apply this middleware to your Express application. It should be added before any routes that may send text/plain; charset=windows-1252 responses.

const express = require('express');
const app = express();

// Use the cp1252 encoding middleware
app.use(cp1252Middleware);

// Example route
app.get('/', (req, res) => {
    res.setHeader('Content-Type', 'text/plain; charset=windows-1252');
    res.send('Hello, this is some text that will be encoded in CP1252!');
});

// Start the server
const PORT = 3000;
app.listen(PORT, () => {
    console.log(`Server is running on http://localhost:${PORT}`);
});

[ThatOneBro]

Closed as completed in #4594