HttpCatWithWrite.java

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.file.Paths;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertificateException;

import javax.ws.rs.GET;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.Response;

import org.apache.commons.io.FileUtils;
import org.glassfish.jersey.jdkhttp.JdkHttpServerFactory;
import org.glassfish.jersey.server.ResourceConfig;
import org.json.JSONException;

public class HttpCatWithWrite {

	@javax.ws.rs.Path("")
	public static class MyResource { // Must be public

		@GET
		@javax.ws.rs.Path("")
		@Produces("application/json")
		public Response list(@QueryParam("value") String iValue, @QueryParam("key") String iKey,
		                     @QueryParam("categoryId") String iCategoryId) throws JSONException, IOException {
			System.err.println("list()");
			String line = iCategoryId + "::" + System.currentTimeMillis() + "::" + iValue;
			System.err.println("Writing to stdout: " + line);
			// I wish I didn't have to do this in Java but I found that even though
			// the browser was returning success, nothing was getting written to the
			// file.
			System.err.println("[DEBUG] about to write to file: " + filepath);
			FileUtils.write(Paths.get(filepath).toFile(), line + "\n", true);
			System.err.println("[DEBUG] wrote to file");
			System.out.println(line);
			return Response.ok().header("Access-Control-Allow-Origin", "*").type("application/json").build();
		}
	}

	private static String filepath = System.getProperty("user.home") + "/db.git/yurl_flatfile_db/yurl_queue_httpcat.txt";

	public static void main(String[] args)
	throws URISyntaxException, IOException, KeyManagementException, UnrecoverableKeyException,
	NoSuchAlgorithmException, KeyStoreException, CertificateException, InterruptedException {
		System.err.println("[TODO] 2023-08 write a golang version even if you don't end up using it");
		try {
			JdkHttpServerFactory.createHttpServer(new URI("http://localhost:" + 4465 + "/"), new ResourceConfig(MyResource.class));
		} catch (Exception e) {
			System.err.println("Port already listened on: 4465");
			System.exit(-1);
		}
		System.err.println("CommandLineOptionsExample.parse() - SRIDHAR: 6");
	}
}