Check http response code

app/src/main/java/eu/faircode/email/ContactInfo.java

@@ -601,6 +601,10 @@ public class ContactInfo {
         connection.connect();
 
         try {
+            int status = connection.getResponseCode();
+            if (status != HttpURLConnection.HTTP_OK)
+                throw new FileNotFoundException("Error " + status + ":" + connection.getResponseMessage());
+
             Bitmap bitmap = ImageHelper.getScaledBitmap(connection.getInputStream(), url.toString(), scaleToPixels);
             if (bitmap == null)
                 throw new FileNotFoundException("decodeStream");

app/src/main/java/eu/faircode/email/DisconnectBlacklist.java

@@ -30,6 +30,7 @@ import org.json.JSONException;
 import org.json.JSONObject;
 
 import java.io.File;
+import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.net.URL;
 import java.util.ArrayList;
@@ -120,6 +121,10 @@ public class DisconnectBlacklist {
         connection.connect();
 
         try {
+            int status = connection.getResponseCode();
+            if (status != HttpsURLConnection.HTTP_OK)
+                throw new FileNotFoundException("Error " + status + ":" + connection.getResponseMessage());
+
             String response = Helper.readStream(connection.getInputStream());
             Helper.writeText(file, response);
         } finally {

app/src/main/java/eu/faircode/email/EmailProvider.java

@@ -355,6 +355,10 @@ public class EmailProvider {
             request.setRequestProperty("User-Agent", WebViewEx.getUserAgent(context));
             request.connect();
 
+            int status = request.getResponseCode();
+            if (status != HttpURLConnection.HTTP_OK)
+                throw new FileNotFoundException("Error " + status + ":" + request.getResponseMessage());
+
             // https://developer.android.com/reference/org/xmlpull/v1/XmlPullParser
             XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
             XmlPullParser xml = factory.newPullParser();

app/src/main/java/eu/faircode/email/FragmentMessages.java

@@ -7771,6 +7771,10 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
                                     connection.connect();
 
                                     try {
+                                        int status = connection.getResponseCode();
+                                        if (status != HttpURLConnection.HTTP_OK)
+                                            throw new FileNotFoundException("Error " + status + ":" + connection.getResponseMessage());
+
                                         Helper.copy(connection.getInputStream(), os);
                                     } finally {
                                         connection.disconnect();

app/src/main/java/eu/faircode/email/FragmentOAuth.java

@@ -70,6 +70,7 @@ import net.openid.appauth.browser.VersionedBrowserMatcher;
 
 import org.json.JSONObject;
 
+import java.io.FileNotFoundException;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.Date;
@@ -483,6 +484,10 @@ public class FragmentOAuth extends FragmentBase {
                     connection.connect();
 
                     try {
+                        int status = connection.getResponseCode();
+                        if (status != HttpsURLConnection.HTTP_OK)
+                            throw new FileNotFoundException("Error " + status + ":" + connection.getResponseMessage());
+
                         String json = Helper.readStream(connection.getInputStream());
                         Log.i("json=" + json);
                         JSONObject data = new JSONObject(json);

app/src/main/java/eu/faircode/email/IPInfo.java

@@ -27,6 +27,7 @@ import android.util.Pair;
 import androidx.annotation.NonNull;
 import androidx.core.net.MailTo;
 
+import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.net.InetAddress;
 import java.net.URL;
@@ -79,6 +80,10 @@ public class IPInfo {
 
         Organization organization = new Organization();
         try {
+            int status = connection.getResponseCode();
+            if (status != HttpsURLConnection.HTTP_OK)
+                throw new FileNotFoundException("Error " + status + ":" + connection.getResponseMessage());
+
             String response = Helper.readStream(connection.getInputStream());
             organization.name = response.trim();
             if ("".equals(organization.name) || "undefined".equals(organization.name))