Fix subscription deeplink (#7295)

- Properly extract url parameter
- Remove prefix before looking it up in the database

app/src/main/java/de/danoeh/antennapod/ui/screen/onlinefeedview/OnlineFeedViewActivity.java

@@ -115,7 +115,7 @@ public class OnlineFeedViewActivity extends AppCompatActivity {
                 username = savedInstanceState.getString("username");
                 password = savedInstanceState.getString("password");
             }
-            lookupUrlAndDownload(feedUrl);
+            lookupUrlAndDownload(UrlChecker.prepareUrl(feedUrl));
         }
     }
 

app/src/main/java/de/danoeh/antennapod/ui/share/ShareUtils.java

@@ -35,12 +35,11 @@ public class ShareUtils {
     }
 
     public static void shareFeedLink(Context context, Feed feed) {
-        String text = feed.getTitle()
-                + "\n\n"
-                + "https://antennapod.org/deeplink/subscribe/?url="
-                + URLEncoder.encode(feed.getDownloadUrl())
-                + "&title="
-                + URLEncoder.encode(feed.getTitle());
+        String feedurl = URLEncoder.encode(feed.getDownloadUrl());
+        feedurl = feedurl.replace("htt", "%68%74%74"); // To not confuse users by having a url inside a url
+        String text = feed.getTitle() + "\n\n"
+                + "https://antennapod.org/deeplink/subscribe/?url=" + feedurl
+                + "&title=" + URLEncoder.encode(feed.getTitle());
         shareLink(context, text);
     }
 

net/common/src/main/java/de/danoeh/antennapod/net/common/UrlChecker.java

@@ -56,11 +56,11 @@ public final class UrlChecker {
             return prepareUrl(url.substring(AP_SUBSCRIBE.length()));
         } else if (lowerCaseUrl.contains(AP_SUBSCRIBE_DEEPLINK)) {
             Log.d(TAG, "Removing " + AP_SUBSCRIBE_DEEPLINK);
-            String removedWebsite = url.substring(url.indexOf("?url=") + "?url=".length());
+            String query = Uri.parse(url).getQueryParameter("url");
             try {
-                return prepareUrl(URLDecoder.decode(removedWebsite, "UTF-8"));
+                return prepareUrl(URLDecoder.decode(query, "UTF-8"));
             } catch (UnsupportedEncodingException e) {
-                return prepareUrl(removedWebsite);
+                return prepareUrl(query);
             }
         } else if (!(lowerCaseUrl.startsWith("http://") || lowerCaseUrl.startsWith("https://"))) {
             Log.d(TAG, "Adding http:// at the beginning of the URL");

net/common/src/test/java/de/danoeh/antennapod/net/common/UrlCheckerTest.java

@@ -114,6 +114,9 @@ public class UrlCheckerTest {
                 + URLEncoder.encode(feed, "UTF-8")));
         assertEquals(feed, UrlChecker.prepareUrl("http://www.antennapod.org/deeplink/subscribe?url="
                 + "example.org/podcast.rss"));
+        assertEquals(feed, UrlChecker.prepareUrl("https://antennapod.org/deeplink/subscribe?url=" + feed + "&title=a"));
+        assertEquals(feed, UrlChecker.prepareUrl("https://antennapod.org/deeplink/subscribe?url="
+                + URLEncoder.encode(feed) + "&title=a"));
     }
 
     @Test