file-streamer
Version:
A TypeScript package for streaming data as files (Excel, CSV, JSON, Base64) and streaming files from file system through HTTP responses
49 lines • 1.78 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.pipeFileFromPath = void 0;
const fs_1 = require("fs");
const path_1 = require("path");
const utils_1 = require("../../utils");
const pipeFileFromPath = async (res, filePath, fileName, contentType) => {
try {
let fileStats;
try {
fileStats = (0, fs_1.statSync)(filePath);
}
catch (error) {
throw new Error(`File not found: ${filePath}`);
}
if (!fileStats.isFile()) {
throw new Error(`Path is not a file: ${filePath}`);
}
const fileExtension = (0, path_1.extname)(filePath);
const mimeType = contentType || (0, utils_1.getContentTypeFromExtension)(fileExtension);
let responseFileName;
if (fileName) {
responseFileName = fileName.includes('.') ? fileName : `${fileName}${fileExtension}`;
}
else {
responseFileName = (0, path_1.basename)(filePath);
}
res.setHeader('Content-Type', mimeType);
res.setHeader('Content-Disposition', `attachment; filename="${responseFileName}"`);
res.setHeader('Content-Length', fileStats.size);
const readStream = (0, fs_1.createReadStream)(filePath);
readStream.on('error', (error) => {
console.error('Error reading file:', error);
if (!res.headersSent) {
res.status(500).end('Error reading file');
}
});
readStream.pipe(res);
}
catch (err) {
console.error(err);
if (!res.headersSent) {
res.status(500).end('Internal server error');
}
throw err;
}
};
exports.pipeFileFromPath = pipeFileFromPath;
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