[feat] use bonafide Provider object as a singleton

There was common situations where two provider instances where running
in parallel. And was creating weird errors (like getting wrong api_uri)
because the bootstrap deferreds were global but the Provider objects
not.

I don't like much singletons, but I think now is simpler than before.

- Resolves: #9073

3 files changed, 31 insertions, 48 deletions

diff --git a/src/leap/bitmask/bonafide/_protocol.py b/src/leap/bitmask/bonafide/_protocol.py
index 004359e..04c5d45 100644
--- a/src/leap/bitmask/bonafide/_protocol.py
+++ b/src/leap/bitmask/bonafide/_protocol.py
@@ -20,11 +20,6 @@ Bonafide protocol.
 import os
 from collections import defaultdict
 
-try:
-    import resource
-except ImportError:
-    pass
-
 from leap.bitmask.bonafide import config
 from leap.bitmask.bonafide.provider import Api
 from leap.bitmask.bonafide.session import Session, OK
@@ -50,11 +45,9 @@ class BonafideProtocol(object):
     log = Logger()
 
     def _get_api(self, provider):
-        # TODO should get deferred
         if provider.domain in self._apis:
             return self._apis[provider.domain]
 
-        # TODO defer the autoconfig for the provider if needed...
         api = Api(provider.api_uri, provider.version)
         self._apis[provider.domain] = api
         return api
@@ -64,7 +57,6 @@ class BonafideProtocol(object):
             return self._sessions[full_id]
 
         # TODO if password/username null, then pass AnonymousCreds
-        # TODO use twisted.cred instead
         username, provider_id = config.get_username_and_provider(full_id)
         credentials = UsernamePassword(username, password)
         api = self._get_api(provider)
@@ -84,7 +76,7 @@ class BonafideProtocol(object):
         self.log.debug('SIGNUP for %s' % full_id)
         _, provider_id = config.get_username_and_provider(full_id)
 
-        provider = config.Provider(provider_id, autoconf=autoconf)
+        provider = config.Provider.get(provider_id, autoconf=autoconf)
         d = provider.callWhenReady(
             self._do_signup, provider, full_id, password, invite)
         return d
@@ -92,23 +84,22 @@ class BonafideProtocol(object):
     def _do_signup(self, provider, full_id, password, invite):
 
         # XXX check it's unauthenticated
-        def return_user(result, _session):
+        def return_user(result):
             return_code, user = result
             if return_code == OK:
                 return user
 
         username, _ = config.get_username_and_provider(full_id)
-        # XXX get deferred?
         session = self._get_session(provider, full_id, password)
         d = session.signup(username, password, invite)
-        d.addCallback(return_user, session)
+        d.addCallback(return_user)
         d.addErrback(self._del_session_errback, full_id)
         return d
 
     def do_authenticate(self, full_id, password, autoconf=False):
         _, provider_id = config.get_username_and_provider(full_id)
 
-        provider = config.Provider(provider_id, autoconf=autoconf)
+        provider = config.Provider.get(provider_id, autoconf=autoconf)
 
         def maybe_finish_provider_bootstrap(result):
             session = self._get_session(provider, full_id, password)
@@ -130,7 +121,6 @@ class BonafideProtocol(object):
 
         self.log.debug('AUTH for %s' % full_id)
 
-        # XXX get deferred?
         session = self._get_session(provider, full_id, password)
         d = session.authenticate()
         d.addCallback(return_token_and_uuid, session)
@@ -170,11 +160,11 @@ class BonafideProtocol(object):
         return session.change_password(new_password)
 
     def do_get_provider(self, provider_id, autoconf=False):
-        provider = config.Provider(provider_id, autoconf=autoconf)
+        provider = config.Provider.get(provider_id, autoconf=autoconf)
         return provider.callWhenMainConfigReady(provider.config)
 
     def do_get_service(self, provider_id, service, autoconf=False):
-        provider = config.Provider(provider_id, autoconf=autoconf)
+        provider = config.Provider.get(provider_id, autoconf=autoconf)
         return provider.callWhenMainConfigReady(provider.config, service)
 
     def do_provider_delete(self, provider_id):
diff --git a/src/leap/bitmask/bonafide/config.py b/src/leap/bitmask/bonafide/config.py
index d0468a4..3417e49 100644
--- a/src/leap/bitmask/bonafide/config.py
+++ b/src/leap/bitmask/bonafide/config.py
@@ -18,7 +18,6 @@
 Configuration for a LEAP provider.
 """
 import binascii
-import datetime
 import json
 import os
 import platform
@@ -31,10 +30,9 @@ from cryptography.hazmat.primitives import hashes
 from cryptography.x509 import load_pem_x509_certificate
 from urlparse import urlparse
 
-from twisted.internet import defer, reactor
+from twisted.internet import defer
 from twisted.logger import Logger
 from twisted.web.client import downloadPage
-from twisted.web.client import readBody
 
 from leap.bitmask.bonafide._http import httpRequest
 from leap.bitmask.bonafide.provider import Discovery
@@ -140,12 +138,7 @@ def delete_provider(domain):
         raise NotConfiguredError("Provider %s is not configured, can't be "
                                  "deleted" % (domain,))
     shutil.rmtree(path)
-
-    # FIXME: this feels hacky, can we find a better way??
-    if domain in Provider.first_bootstrap:
-        del Provider.first_bootstrap[domain]
-    if domain in Provider.ongoing_bootstrap:
-        del Provider.ongoing_bootstrap[domain]
+    Provider.providers[domain] = None
 
 
 class Provider(object):
@@ -155,10 +148,15 @@ class Provider(object):
         'mx': ['soledad', 'smtp']}
 
     log = Logger()
+    providers = defaultdict(None)
 
-    first_bootstrap = defaultdict(None)
-    ongoing_bootstrap = defaultdict(None)
-    stuck_bootstrap = defaultdict(None)
+    @classmethod
+    def get(self, domain, autoconf=False, basedir=None,
+            cert_path=None):
+        if domain not in self.providers:
+            self.providers[domain] = Provider(domain, autoconf, basedir,
+                                              cert_path)
+        return self.providers[domain]
 
     def __init__(self, domain, autoconf=False, basedir=None,
                  cert_path=None):
@@ -169,6 +167,9 @@ class Provider(object):
         self._disco = Discovery('https://%s' % domain)
         self._provider_config = None
 
+        self.first_bootstrap = defer.Deferred()
+        self.stuck_bootstrap = None
+
         is_configured = self.is_configured()
         if not cert_path and is_configured:
             cert_path = self._get_ca_cert_path()
@@ -198,7 +199,7 @@ class Provider(object):
     @property
     def api_uri(self):
         if not self._provider_config:
-            return 'https://api.%s:4430' % self._domain
+            return None
         return self._provider_config.api_uri
 
     @property
@@ -233,23 +234,15 @@ class Provider(object):
     def bootstrap(self, replace_if_newer=False):
         domain = self._domain
         self.log.debug('Bootstrapping provider %s' % domain)
-        ongoing = self.ongoing_bootstrap.get(domain)
-        if ongoing:
-            self.log.debug('Already bootstrapping this provider...')
-            self.ongoing_bootstrap[domain].addCallback(
-                self._reload_http_client)
-            return
-
-        self.first_bootstrap[self._domain] = defer.Deferred()
 
         def first_bootstrap_done(ignored):
             try:
-                self.first_bootstrap[domain].callback('got config')
+                self.first_bootstrap.callback('got config')
             except defer.AlreadyCalledError:
                 pass
 
         def first_bootstrap_error(failure):
-            self.first_bootstrap[domain].errback(failure)
+            self.first_bootstrap.errback(failure)
             return failure
 
         d = self.maybe_download_provider_info(replace=replace_if_newer)
@@ -257,15 +250,15 @@ class Provider(object):
         d.addCallback(self.validate_ca_cert)
         d.addCallbacks(first_bootstrap_done, first_bootstrap_error)
         d.addCallback(self.maybe_download_services_config)
-        self.ongoing_bootstrap[domain] = d
+        self.ongoing_bootstrap = d
 
     def callWhenMainConfigReady(self, cb, *args, **kw):
-        d = self.first_bootstrap[self._domain]
+        d = self.first_bootstrap
         d.addCallback(lambda _: cb(*args, **kw))
         return d
 
     def callWhenReady(self, cb, *args, **kw):
-        d = self.ongoing_bootstrap[self._domain]
+        d = self.ongoing_bootstrap
         d.addCallback(lambda _: cb(*args, **kw))
         return d
 
@@ -372,7 +365,7 @@ class Provider(object):
         def further_bootstrap_needs_auth(ignored):
             self.log.warn('Cannot download services config yet, need auth')
             pending_deferred = defer.Deferred()
-            self.stuck_bootstrap[self._domain] = pending_deferred
+            self.stuck_bootstrap = pending_deferred
             return defer.succeed('ok for now')
 
         uri, met, path = self._get_configs_download_params()
@@ -391,10 +384,10 @@ class Provider(object):
             return True
 
         def complete_bootstrapping(ignored):
-            stuck = self.stuck_bootstrap.get(self._domain, None)
-            if stuck:
+            if self.stuck_bootstrap:
                 d = self._get_config_for_all_services(session)
-                d.addCallback(lambda _: stuck.callback('continue!'))
+                d.addCallback(lambda _:
+                              self.stuck_bootstrap.callback('continue!'))
                 return d
 
         self._load_provider_json()
diff --git a/src/leap/bitmask/core/mail_services.py b/src/leap/bitmask/core/mail_services.py
index 4a5f979..5337b31 100644
--- a/src/leap/bitmask/core/mail_services.py
+++ b/src/leap/bitmask/core/mail_services.py
@@ -150,7 +150,7 @@ def _get_provider_from_full_userid(userid):
     _, provider_id = config.get_username_and_provider(userid)
     # TODO -- this autoconf should be passed from the
     # command flag. workaround to get cli workinf for now.
-    return config.Provider(provider_id, autoconf=True)
+    return config.Provider.get(provider_id, autoconf=True)
 
 
 def is_service_ready(service, provider):
@@ -337,7 +337,7 @@ class KeymanagerContainer(Container):
         return keymanager
 
     def _get_api_uri(self, provider):
-        api_uri = config.Provider(provider).api_uri
+        api_uri = config.Provider.get(provider).api_uri
         return api_uri
 
     def _get_nicknym_uri(self, provider):