Break out into a multi-module project

service/src/main/java/org/whispersystems/textsecuregcm/recaptcha/RecaptchaClient.java

@@ -0,0 +1,56 @@
+package org.whispersystems.textsecuregcm.recaptcha;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.jaxrs.json.JacksonJaxbJsonProvider;
+import org.glassfish.jersey.client.ClientConfig;
+
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.ClientBuilder;
+import javax.ws.rs.client.Entity;
+import javax.ws.rs.core.MultivaluedHashMap;
+import javax.ws.rs.core.MultivaluedMap;
+
+public class RecaptchaClient {
+
+  private final Client client;
+  private final String recaptchaSecret;
+
+  public RecaptchaClient(String recaptchaSecret) {
+    this.client          = ClientBuilder.newClient(new ClientConfig(new JacksonJaxbJsonProvider().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)));
+    this.recaptchaSecret = recaptchaSecret;
+  }
+
+  public boolean verify(String captchaToken) {
+    MultivaluedMap<String, String> formData = new MultivaluedHashMap<>();
+    formData.add("secret", recaptchaSecret);
+    formData.add("response", captchaToken);
+
+    VerifyResponse response = client.target("https://www.google.com/recaptcha/api/siteverify")
+                                    .request()
+                                    .post(Entity.form(formData), VerifyResponse.class);
+
+    return response.success;
+  }
+
+  private static class VerifyResponse {
+    @JsonProperty
+    private boolean success;
+
+    @JsonProperty("error-codes")
+    private String[] errorCodes;
+
+    @JsonProperty
+    private String hostname;
+
+    @JsonProperty
+    private String challenge_ts;
+
+    @Override
+    public String toString() {
+      return "success: " + success + ", errorCodes: " + String.join(", ", errorCodes == null ? new String[0] : errorCodes) + ", hostname: " + hostname + ", challenge_ts: " + challenge_ts;
+    }
+  }
+
+}
+