[BUG] 4.1.1 composes /app/list path wrong when instance is installed in subfolder (/owncloud)

CHANGELOG.md

@@ -33,6 +33,7 @@ ownCloud admins and users.
 * Bugfix - Bugs related to Details view: [#4188](https://github.com/owncloud/android/issues/4188)
 * Bugfix - Some Null Pointer Exceptions fixed from Google Play: [#4207](https://github.com/owncloud/android/issues/4207)
 * Bugfix - Add "scope" parameter to /token endpoint HTTP requests: [#4260](https://github.com/owncloud/android/pull/4260)
+* Bugfix - Fix in the handling of the base URL: [#4279](https://github.com/owncloud/android/issues/4279)
 * Change - Android library as a module instead of submodule: [#3962](https://github.com/owncloud/android/issues/3962)
 * Enhancement - Koin DSL: [#3966](https://github.com/owncloud/android/pull/3966)
 * Enhancement - Unit tests for datasources classes - Part 1 & Fixes: [#4063](https://github.com/owncloud/android/issues/4063)
@@ -103,6 +104,14 @@ ownCloud admins and users.
 
    https://github.com/owncloud/android/pull/4260
 
+* Bugfix - Fix in the handling of the base URL: [#4279](https://github.com/owncloud/android/issues/4279)
+
+   Base URL has been formatted in GetRemoteAppRegistryOperation when server
+   instance is installed in subfolder, so that the endpoint is formed correctly.
+
+   https://github.com/owncloud/android/issues/4279
+   https://github.com/owncloud/android/pull/4287
+
 * Change - Android library as a module instead of submodule: [#3962](https://github.com/owncloud/android/issues/3962)
 
    Android library, containing all networking stuff, is now the 5th module in the

changelog/unreleased/4287

@@ -0,0 +1,7 @@
+Bugfix: Fix in the handling of the base URL
+
+Base URL has been formatted in GetRemoteAppRegistryOperation
+when server instance is installed in subfolder, so that the endpoint is formed correctly.
+
+https://github.com/owncloud/android/issues/4279
+https://github.com/owncloud/android/pull/4287

owncloudComLibrary/src/main/java/com/owncloud/android/lib/resources/appregistry/GetRemoteAppRegistryOperation.kt

@@ -43,10 +43,9 @@ class GetRemoteAppRegistryOperation(private val appUrl: String?) : RemoteOperati
         var result: RemoteOperationResult<AppRegistryResponse>
 
         try {
-            val uriBuilder = client.baseUri.buildUpon().apply {
-                appendEncodedPath(appUrl)
-            }
-            val getMethod = GetMethod(URL(uriBuilder.build().toString()))
+            val urlFormatted = removeSubfolder(client.baseUri.toString()) + appUrl
+            val getMethod = GetMethod(URL(urlFormatted))
+
             val status = client.executeHttpMethod(getMethod)
 
             val response = getMethod.getResponseBodyAsString()
@@ -75,4 +74,15 @@ class GetRemoteAppRegistryOperation(private val appUrl: String?) : RemoteOperati
 
         return result
     }
+
+    private fun removeSubfolder(url: String): String {
+        val doubleSlashIndex = url.indexOf("//")
+        val nextSlashIndex = url.indexOf('/', doubleSlashIndex + 2)
+        return if (nextSlashIndex >= 0) {
+            val result = url.substring(0, nextSlashIndex)
+            if (result.endsWith("/")) result else "$result/"
+        } else {
+            if (url.endsWith("/")) url else "$url/"
+        }
+    }
 }