simple-pdf-validator v0.0.2

Simple pdf validator

Simple PDF validations with multer files. So you can assure people are not trying to upload something else to your server with pdf extension.

Install

NPM:

npm install pdf-validator

Yarn

yarn add pdf-validator

Usage

NestJs example

import {
  Controller,
  Post,
  UploadedFile,
  UseInterceptors,
} from '@nestjs/common';
import { FileInterceptor } from '@nestjs/platform-express';
import { checkPdf } from 'pdf-validator'

@Controller()
export class UploadController {
  @Post('upload')
  @UseInterceptors(FileInterceptor('file'))
  uploadFile(@UploadedFile() file: Express.Multer.File) {
    checkPdf(file);

    return { message: 'File uploaded successfully' };
  }
}

Explanation

It works by checking some things: 1. File size (if max provided) 2. Mimetype 3. Pdf version at start of file 4. Ensure the EOF is actually the end of the file (7 chars for some versions, 6 chars for others.)