Swift

PDF url

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var textView: UITextView!

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    @IBAction func extractText(_ sender: Any) {
        guard let url = URL(string: "https://v1.mlapi.co/pdf/pdf-to-text") else { return }

        var request = URLRequest(url: url)
        request.httpMethod = "POST"
        let body = "pdf_url=https://example.com/your-pdf.pdf&api_key=your_api_key"
        request.httpBody = body.data(using: .utf8)
        request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")

        let task = URLSession.shared.dataTask(with: request) { data, response, error in
            guard let data = data, error == nil else {
                print("Error:", error ?? "Unknown error")
                return
            }
            let responseString = String(data: data, encoding: .utf8)
            DispatchQueue.main.async {
                self.textView.text = responseString
            }
        }
        task.resume()
    }
}

Upload PDF file

import UIKit

class ViewController: UIViewController, UIDocumentPickerDelegate {

    @IBOutlet weak var textView: UITextView!

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    @IBAction func pickFile(_ sender: Any) {
        let documentPicker = UIDocumentPickerViewController(documentTypes: ["com.adobe.pdf"], in: .import)
        documentPicker.delegate = self
        present(documentPicker, animated: true, completion: nil)
    }

    func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
        guard let url = urls.first else { return }
        uploadFile(url: url)
    }

    func uploadFile(url: URL) {
        guard let requestUrl = URL(string: "https://v1.mlapi.co/pdf/pdf-to-text") else { return }

        var request = URLRequest(url: requestUrl)
        request.httpMethod = "POST"

        let boundary = UUID().uuidString
        request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")

        var data = Data()

        data.append("--\(boundary)\r\n".data(using: .utf8)!)
        data.append("Content-Disposition: form-data; name=\"file\"; filename=\"\(url.lastPathComponent)\"\r\n".data(using: .utf8)!)
        data.append("Content-Type: application/pdf\r\n\r\n".data(using: .utf8)!)
        data.append(try! Data(contentsOf: url))
        data.append("\r\n".data(using: .utf8)!)

        data.append("--\(boundary)\r\n".data(using: .utf8)!)
        data.append("Content-Disposition: form-data; name=\"api_key\"\r\n\r\n".data(using: .utf8)!)
        data.append("your_api_key\r\n".data(using: .utf8)!)

        data.append("--\(boundary)--\r\n".data(using: .utf8)!)

        let task = URLSession.shared.uploadTask(with: request, from: data) { data, response, error in
            guard let data = data, error == nil else {
                print("Error:", error ?? "Unknown error")
                return
            }
            let responseString = String(data: data, encoding: .utf8)
            DispatchQueue.main.async {
                self.textView.text = responseString
            }
        }
        task.resume()
    }
}