Question

Is it possible to access files beyond WEB-INF folder in Google App Engine’s development server ? Maybe I can somehow force GAE dev server to do not block external connections/file access ?

I’m trying to create Java version of gae-sqlite. But I can’t access external sql server (mysql or h2db) due to access denied exceptions.

Call stack:

Caused by: java.security.AccessControlException: access denied (java.io.FilePermission C:\work\test_projects\gae_test\out\artifacts\gae_test_war_exploded\database.lock.db write)
    at java.security.AccessControlContext.checkPermission(AccessControlContext.java:374)
    at java.security.AccessController.checkPermission(AccessController.java:546)
    at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
    at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:252)
    at java.lang.SecurityManager.checkWrite(SecurityManager.java:962)
    at java.io.File.createNewFile(File.java:882)
    at org.h2.store.fs.FilePathDisk.createFile(FilePathDisk.java:121)
    at org.h2.store.fs.FileUtils.createFile(FileUtils.java:59)
    at org.h2.store.FileLock.lockFile(FileLock.java:327)
    at org.h2.store.FileLock.lock(FileLock.java:128)
    at org.h2.engine.Database.open(Database.java:542)
    at org.h2.engine.Database.openDatabase(Database.java:222)

Answer 1

As of GAE SDK 1.6.1 it’s not possible. If you guys later find the way to do it please let me know.