HttpClient SE REST client for SG2C PSC googleapis.com calls without using spring boot

[obriensystems]

Working with client calling into GCP https://github.com/GoogleCloudPlatform/pubsec-declarative-toolkit/issues/562 Authentication in a mixed VPN and Proxy environment requires a client beyond curl https://github.com/ObrienlabsDev/rest-client-java/tree/main

Continue work on PSC API access in https://github.com/GoogleCloudPlatform/pubsec-declarative-toolkit/issues/494 Key off existing example in spring boot off https://github.com/obrienlabs/magellan/blob/master/magellan-nbi/src/main/java/global/packet/magellan/integration/RestClient.java#L39

Move from HttpUrlConnection pre-11 to HttpClient see https://docs.oracle.com/en/java/javase/11/docs/api/java.net.http/java/net/http/HttpClient.html#:~:text=An%20HttpClient%20can%20be%20used,proxy%2C%20an%20authenticator%2C%20etc.

[obriensystems]

public class RestClient {

// from 

static Logger logger = Logger.getLogger(RestClient.class.getName());

private static final String URL_CREATE_RECORD =
            "http://biometric.elasticbeanstalk.com/FrontController?action=activeid";

public static void restCall() {     
    HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create(URL_CREATE_RECORD))
            .GET()
            .build();

//HttpClient client = HttpClient.newBuilder().build();
HttpClient client = HttpClient.newBuilder()
        .version(Version.HTTP_1_1)
        .followRedirects(Redirect.NORMAL)
        .connectTimeout(Duration.ofSeconds(20))
        //.proxy(ProxySelector.of(new InetSocketAddress("proxy.example.com", 80)))
        //.authenticator(Authenticator.getDefault())
        .build();
try {
    HttpResponse<String> response = client.send(request, BodyHandlers.ofString());
    String body = response.body();
    logger.info("Response: " + body);

    System.out.println(response.statusCode());
    System.out.println(response.body()); 
} catch (IOException ioe) {
    ioe.printStackTrace();
} catch (InterruptedException ie) {
    ie.printStackTrace();
}   
}

public static void main( String[] args )
{
    RestClient app = new RestClient();
    app.restCall();
}

}

[fmichaelobrien]

Google Cloud Functions - HTTPS endpoint

• Use the following GCP Google Cloud Functions V2 https endpoint (org: oldev - proj: dev/eventstream-dev
• list parameter is input into a random selector

https://northamerica-northeast1-eventstream-dev.cloudfunctions.net/random2?list=first,second,third,forth

{key: 1, value: second}

https://github.com/ObrienlabsDev/rest-client-java/tree/main

package gcfv2;

import java.io.BufferedWriter;
import java.io.IOException;

import com.google.cloud.functions.HttpFunction;
import com.google.cloud.functions.HttpRequest;
import com.google.cloud.functions.HttpResponse;

import java.util.Collections;
import java.util.List;
import java.util.Optional;
import java.util.StringTokenizer;
import java.util.stream.Collectors;

public class HelloHttpFunction implements HttpFunction {

  public String random(BufferedWriter writer, String input) throws java.lang.Exception {
        List<String> strings = Collections.list(new StringTokenizer(input, ",")).stream()
          .map(token -> (String) token)
          .collect(Collectors.toList());
    int index = (int)(Math.random() * strings.size());
    writer.write("{key: " + index + ", ");
        return strings.get(index);
  }

  public void service(final HttpRequest request, final HttpResponse response) throws java.lang.Exception, IOException {
    final BufferedWriter writer = response.getWriter();
    Optional<String> aCSVString = aCSVString = request.getFirstQueryParameter("list");
    if(aCSVString.isPresent()) {
      writer.write("value: " + random(writer, aCSVString.get()) + "}");
    } else {
      writer.write("append ?list=first,second,third....to get a random indexed string back in json");
    }
  }
}

[fmichaelobrien]

https proxy settings must be at the war/jar classloader level to allow for AD authentication via System.setProperty()