Decode US Driver License PDF417 Barcodes with Java

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.net.URI;
import java.net.http.*;
import java.nio.file.Files;
import java.nio.file.Path;
import java.time.Duration;
import java.util.Base64;
import java.util.Map;

ObjectMapper mapper = new ObjectMapper();
String image = Base64.getEncoder().encodeToString(
    Files.readAllBytes(Path.of("license-back.jpg"))
);
String body = mapper.writeValueAsString(Map.of("img", image));

HttpRequest request = HttpRequest.newBuilder()
    .uri(URI.create("https://api.structocr.com/v1/driver-license-pdf417"))
    .timeout(Duration.ofSeconds(30))
    .header("Content-Type", "application/json")
    .header("x-api-key", System.getenv("STRUCTOCR_API_KEY"))
    .POST(HttpRequest.BodyPublishers.ofString(body))
    .build();

HttpResponse<String> response = HttpClient.newHttpClient()
    .send(request, HttpResponse.BodyHandlers.ofString());
JsonNode result = mapper.readTree(response.body());

if (response.statusCode() == 422) {
    System.out.println("Retake image: " + result.path("error").asText());
} else if (response.statusCode() != 200) {
    throw new RuntimeException(response.body());
} else {
    JsonNode data = result.path("data");
    System.out.println("License: " + data.path("document_number").asText());
    System.out.println("DOB: " + data.path("date_of_birth").asText());
}