APIUploadCall

APIUploadCall

import { NextRequest, NextResponse } from 'next/server'; // To handle the request and response
const fs = require("fs").promises; // To save the file temporarily
import { v4 as uuidv4 } from 'uuid'; // To generate a unique filename
import  PDFParser from 'pdf2json'; // To parse the pdf
import { File } from 'buffer';
import { join } from "path";
import { tmpdir } from "os";

export async function POST(req: NextRequest) {
  console.log('Incoming request...');
  
  const formData: FormData = await req.formData();
  const uploadedFiles = formData.getAll('filepond');
  let fileName = '';
  let parsedText = '';

  if (uploadedFiles && uploadedFiles.length > 0) {
    const uploadedFile = uploadedFiles[1];
    console.log('Uploaded file:', uploadedFile);

    // Check if uploadedFile is of type File
    if (uploadedFile instanceof File) {
      console.log('Uploaded file is of type File.');

      // Generate a unique filename
      const fileName = uuidv4();
      console.log('Generated file name:', fileName);

      // Get the system's temporary directory
      const tmpDir = tmpdir();
      console.log('Temporary directory:', tmpDir);

      // Generate the path to the temporary file
      const tempFilePath = join(tmpDir, `${fileName}.pdf`);
      console.log('Temporary file path:', tempFilePath);

      // Convert ArrayBuffer to Buffer
      const fileBuffer = Buffer.from(await uploadedFile.arrayBuffer());
      console.log('Converted ArrayBuffer to Buffer.');

      // Save the buffer as a file
      await fs.writeFile(tempFilePath, fileBuffer);
      console.log('File saved successfully.');

      // Parse the pdf using pdf2json.
      const pdfParser = new (PDFParser as any)(null, 1);

      await new Promise<void>((resolve, reject) => {
        // See pdf2json docs for more info on how the below works.
        pdfParser.on('pdfParser_dataError', (errData: any) =>
          console.log(errData.parserError)
        );

        pdfParser.on('pdfParser_dataReady', () => {
          console.log('PDF parsing complete.');
          console.log('Raw text content:', (pdfParser as any).getRawTextContent());
          parsedText = (pdfParser as any).getRawTextContent();
          resolve();
        });

        pdfParser.loadPDF(tempFilePath);
      });
    } else {
      console.log('Uploaded file is not in the expected format.');
    }
  } else {
    console.log('No files found.');
  }

  console.log('Preparing response...');
  const response = new NextResponse(parsedText);
  response.headers.set('FileName', fileName);
  console.log('Response prepared.');
  return response;
}