PDF Reader API

Overview

The PDF Reader API is a Spring Boot-based application that allows users to upload and parse PDF documents, extract text, and process the extracted data using an LLM (Language Model). This API supports standard PDFs and password-protected PDFs, and it integrates OpenAI's GPT-4 Turbo for data extraction.

Features

• 📄 Upload and parse PDF files
• 🔑 Secure PDF parsing with dynamic password generation
• 🧠 Extract structured data using GPT-4 Turbo
• 📂 Parse PDFs stored on disk

Technologies Used

• Java 17
• Spring Boot
• Apache PDFBox (for PDF text extraction)
• OpenAI API (for processing extracted text)
• Maven (for dependency management)

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Installation and Setup

1️⃣ Clone the Repository

 git clone <repository-url>
 cd pdf-reader-api

2️⃣ Configure Application Properties

Create an application.yml file inside src/main/resources/ with the following content:

spring:
  servlet:
    multipart:
      enabled: true
      max-file-size: 10MB
      max-request-size: 20MB

theokanning:
  openai:
    api-key: YOUR_OPENAI_API_KEY

Replace YOUR_OPENAI_API_KEY with a valid OpenAI API key.

3️⃣ Build and Run the Application

mvn clean install
mvn spring-boot:run

The application will start at http://localhost:8080

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API Endpoints

🟢 Upload & Parse PDF

Endpoint:

POST /api/pdf/parse

Request:

• file (Multipart File) → Upload a PDF file

Response:

{
  "name": "Krishna Kumar",
  "email": "[email protected]",
  "opening_balance": 1000,
  "closing_balance": 1500
}

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🔐 Secure PDF Parsing (Password Required)

Endpoint:

POST /api/pdf/parse-secure

Request:

• file (Multipart File)
• firstname (String)
• dob (String, format: YYYY-MM-DD)

Response:

{
  "name": "Krishna Kumar",
  "email": "[email protected]",
  "opening_balance": 1000,
  "closing_balance": 1500
}

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📂 Parse PDF from Disk

Endpoint:

GET /api/pdf/parse-from-disk

Request:

• filename (String) → Name of the PDF file stored in src/main/resources/pdf/

Response:

{
  "name": "Krishna Kumar",
  "email": "[email protected]",
  "opening_balance": 1000,
  "closing_balance": 1500
}

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Possible Issues and Fixes

It is giving the data in timeline from the pdf file but still showing error in postman

• Needs slight fix

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Contributors

• Shivam - Initial Development

License

This project is licensed under the MIT License.