Add recaptcha

app/src/main/java/com/hippo/ehviewer/client/EhEngine.java

@@ -17,6 +17,7 @@
 package com.hippo.ehviewer.client;
 
 import android.support.annotation.Nullable;
+import android.text.TextUtils;
 import android.util.Log;
 import android.util.Pair;
 
@@ -120,13 +121,17 @@ public class EhEngine {
     }
 
     public static String signIn(@Nullable EhClient.Task task, OkHttpClient okHttpClient,
-            String username, String password) throws Exception {
+            String username, String password, String recaptchaChallenge, String recaptchaResponse) throws Exception {
         FormBody.Builder builder = new FormBody.Builder()
                 .add("UserName", username)
                 .add("PassWord", password)
                 .add("submit", "Log me in")
                 .add("CookieDate", "1")
                 .add("temporary_https", "off");
+        if (!TextUtils.isEmpty(recaptchaChallenge) && !TextUtils.isEmpty(recaptchaResponse)) {
+            builder.add("recaptcha_challenge_field", recaptchaChallenge);
+            builder.add("recaptcha_response_field", recaptchaResponse);
+        }
         String url = EhUrl.API_SIGN_IN;
         Log.d(TAG, url);
         Request request = new EhRequestBuilder(url, null != task ? task.getEhConfig() : Settings.getEhConfig())