Coursera and EDX Course Scraper

import java.io.IOException;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.time.Duration;

public class ScraperRunSimple {
    // API URL
    private static final String API_URL = "https://openapi.coreclaw.com/api/v1/scraper/run";

    // Your API KEY
    private static final String API_KEY = "<YOUR_API_KEY>";

    // Request timeout (seconds)
    private static final int TIMEOUT = 30;
    
    public static void main(String[] args) {
        // Build request JSON
        String jsonBody = buildRequestBody();
        
        // Create HttpClient
        HttpClient client = HttpClient.newBuilder()
            .connectTimeout(Duration.ofSeconds(TIMEOUT))
            .build();
        
        // Create HttpRequest
        HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create(API_URL))
            .timeout(Duration.ofSeconds(TIMEOUT))
            .header("api-key", API_KEY)
            .header("Content-Type", "application/json")
            .POST(HttpRequest.BodyPublishers.ofString(jsonBody))
            .build();

        System.out.println("Sending request to API...");

        try {
            // Send request
            HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());

            // Check HTTP status code
            int statusCode = response.statusCode();
            if (statusCode != 200) {
                System.out.println("Request failed!");
                System.out.println("HTTP error: " + statusCode + " - " + response.body());
                return;
            }

            // Parse response (simple string handling, no external libraries needed)
            String responseBody = response.body();
            System.out.println("Response content: " + responseBody);

            // Extract run_slug (simple parsing)
            String runSlug = extractRunSlug(responseBody);
            if (runSlug != null) {
                System.out.println("Worker run successful!");
                System.out.println("Run ID: " + runSlug);
                System.out.println("You can use this ID to query run status and results");
            } else {
                System.out.println("Request failed!");
                System.out.println("Unable to parse run_slug");
            }
        } catch (IOException e) {
            System.out.println("Request failed!");
            System.out.println("IO error: " + e.getMessage());
        } catch (InterruptedException e) {
            System.out.println("Request failed!");
            System.out.println("Request interrupted: " + e.getMessage());
            Thread.currentThread().interrupt();
        }
    }

    /**
     * Build request JSON body
     */
    private static String buildRequestBody() {
        return """
            {
                "scraper_slug": "01KG2DV66JTCN65ZBTRX3M456E",
                "version": "v1.0.8",
                "input": {
                    "parameters": {
                        "system": {
                            "proxy_region": "",
                            "cpus": 0.125,
                            "memory": 512,
                            "execute_limit_time_seconds": 1800,
                            "max_total_charge": 0,
                            "max_total_traffic": 0
                        },
                        "custom": {
          "platforms": [
                    {
                              "string": "coursera"
                    },
                    {
                              "string": "edx"
                    },
                    {
                              "string": "linkedin"
                    }
          ],
          "keywords": [
                    {
                              "string": "python"
                    },
                    {
                              "string": "javascript"
                    }
          ],
          "maxResultsPerKeyword": 20,
          "startPage": 1,
          "maxPages": 5
}
                    }
                },
                "callback_url": "https://your-domain.com/callback"
            }
            """;
    }

    /**
     * Extract run_slug from response (simple string handling)
     */
    private static String extractRunSlug(String json) {
        try {
            // Find "run_slug":"xxx"
            int startIndex = json.indexOf("\"run_slug\":\"");
            if (startIndex == -1) {
                return null;
            }

            startIndex += "\"run_slug\":\"".length();
            int endIndex = json.indexOf("\"", startIndex);
            if (endIndex == -1) {
                return null;
            }
            return json.substring(startIndex, endIndex);
        } catch (Exception e) {
            return null;
        }
    }
}