form-auto-content

import formAutoContent from 'form-auto-content'; import * as fs from 'fs'; import * as path from 'path'; import { Readable } from 'stream'; // Create dummy files for the example const tempFilePath1 = path.join(__dirname, 'the-file.txt'); const tempFilePath2 = path.join(__dirname, 'foo.md'); fs.writeFileSync(tempFilePath1, 'This is file content.'); fs.writeFileSync(tempFilePath2, '# Hello Markdown'); async function example() { // Scenario 1: x-www-form-urlencoded (no files/buffers) - auto-detected const formUrlEncoded = formAutoContent({ field1: 'value1', field2: ['value2', 'value2.2'], numberField: 123, }); console.log('--- URL-encoded Form ---'); console.log('Headers:', formUrlEncoded.headers); // Should be application/x-www-form-urlencoded const urlEncodedPayload = await streamToString(formUrlEncoded.payload as Readable); console.log('Payload:', urlEncodedPayload); console.log('\n'); // Scenario 2: multipart/form-data (with files/buffers) and custom output names - auto-detected const options = { payload: 'requestBody', headers: 'requestHeaders', // forceMultiPart: true // Can be uncommented to explicitly force multipart/form-data } as const; // 'as const' is crucial for TypeScript to infer correct return types const formMultiPart = formAutoContent({ name: 'John Doe', email: 'john@example.com', profilePic: fs.createReadStream(tempFilePath1), document: { value: fs.createReadStream(tempFilePath2), options: { filename: 'my-doc.md', contentType: 'text/markdown' } }, items: ['item1', 'item2'], jsonField: Buffer.from(JSON.stringify({ key: 'value', arr: [1, 2] })), }, options); console.log('--- Multipart Form with Custom Names ---'); console.log('Headers:', formMultiPart.requestHeaders); // Should be multipart/form-data // In a real scenario, you would pipe formMultiPart.requestBody to an HTTP client. console.log('Payload is a stream:', formMultiPart.requestBody instanceof Readable); console.log('\n'); // Clean up dummy files fs.unlinkSync(tempFilePath1); fs.unlinkSync(tempFilePath2); } // Helper function to convert a stream to string (for url-encoded example) function streamToString(stream: Readable): Promise<string> { const chunks: Buffer[] = []; return new Promise((resolve, reject) => { stream.on('data', chunk => chunks.push(chunk)); stream.on('error', reject); stream.on('end', () => resolve(Buffer.concat(chunks).toString('utf8'))); }); } example().catch(console.error);