file-streamer/dist/functions/json/csv.js

A TypeScript package for streaming data as files (Excel, CSV, JSON, Base64) and streaming files from file system through HTTP responses

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.pipeJsonAsCsv = void 0;
const pipeJsonAsCsv = async (res, data, fileName) => {
    try {
        let responseFileName = !fileName
            ? 'data.csv'
            : fileName.endsWith('.csv')
                ? fileName
                : `${fileName}.csv`;
        res.setHeader('Content-Type', 'text/csv');
        res.setHeader('Content-Disposition', `attachment; filename=${responseFileName}`);
        if (data.length === 0) {
            res.write('No data');
            res.end();
            return;
        }
        const headers = Object.keys(data[0]);
        const headerRow = headers.join(',');
        res.write(headerRow + '\n');
        data.forEach((item) => {
            const row = headers.map((header) => {
                const value = item[header];
                if (typeof value === 'string' &&
                    (value.includes(',') || value.includes('"') || value.includes('\n'))) {
                    return `"${value.replace(/"/g, '""')}"`;
                }
                return value ?? '';
            });
            res.write(row.join(',') + '\n');
        });
        res.end();
    }
    catch (err) {
        console.error(err);
        throw err;
    }
};
exports.pipeJsonAsCsv = pipeJsonAsCsv;
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