Use Twisted's deferToThread and Deferreds to handle parallel tasks

This removes CheckerThread

1 files changed, 54 insertions, 88 deletions

diff --git a/src/leap/services/mail/smtpbootstrapper.py b/src/leap/services/mail/smtpbootstrapper.py
index 6e0a0a47..64bf3153 100644
--- a/src/leap/services/mail/smtpbootstrapper.py
+++ b/src/leap/services/mail/smtpbootstrapper.py
@@ -22,8 +22,6 @@ SMTP bootstrapping
 import logging
 import os
 
-import requests
-
 from PySide import QtCore
 
 from leap.common.check import leap_assert, leap_assert_type
@@ -31,44 +29,30 @@ from leap.common.files import get_mtime
 from leap.config.providerconfig import ProviderConfig
 from leap.crypto.srpauth import SRPAuth
 from leap.util.request_helpers import get_content
+from leap.services.abstractbootstrapper import AbstractBootstrapper
 
 logger = logging.getLogger(__name__)
 
 
-class SMTPBootstrapper(QtCore.QObject):
+class SMTPBootstrapper(AbstractBootstrapper):
     """
     SMTP init procedure
     """
 
-    PASSED_KEY = "passed"
-    ERROR_KEY = "error"
-
-    IDLE_SLEEP_INTERVAL = 100
-
     # All dicts returned are of the form
     # {"passed": bool, "error": str}
     download_config = QtCore.Signal(dict)
 
     def __init__(self):
-        QtCore.QObject.__init__(self)
+        AbstractBootstrapper.__init__(self)
 
-        # **************************************************** #
-        # Dependency injection helpers, override this for more
-        # granular testing
-        self._fetcher = requests
-        # **************************************************** #
-
-        self._session = self._fetcher.session()
         self._provider_config = None
         self._smtp_config = None
         self._download_if_needed = False
 
-    def _download_config(self):
+    def _download_config(self, *args):
         """
         Downloads the SMTP config for the given provider
-
-        :return: True if everything went as expected, False otherwise
-        :rtype: bool
         """
 
         leap_assert(self._provider_config,
@@ -77,79 +61,59 @@ class SMTPBootstrapper(QtCore.QObject):
         logger.debug("Downloading SMTP config for %s" %
                      (self._provider_config.get_domain(),))
 
-        download_config_data = {
-            self.PASSED_KEY: False,
-            self.ERROR_KEY: ""
-        }
-
-        try:
-            headers = {}
-            mtime = get_mtime(os.path.join(self._smtp_config
-                                           .get_path_prefix(),
-                                           "leap",
-                                           "providers",
-                                           self._provider_config.get_domain(),
-                                           "smtp-service.json"))
-
-            if self._download_if_needed and mtime:
-                headers['if-modified-since'] = mtime
-
-            # there is some confusion with this uri,
-            config_uri = "%s/%s/config/smtp-service.json" % (
-                self._provider_config.get_api_uri(),
-                self._provider_config.get_api_version())
-            logger.debug('Downloading SMTP config from: %s' % config_uri)
-
-            srp_auth = SRPAuth(self._provider_config)
-            session_id = srp_auth.get_session_id()
-            cookies = None
-            if session_id:
-                cookies = {"_session_id": session_id}
-
-            res = self._session.get(config_uri,
-                                    verify=self._provider_config
-                                    .get_ca_cert_path(),
-                                    headers=headers,
-                                    cookies=cookies)
-            res.raise_for_status()
-
-            # Not modified
-            if res.status_code == 304:
-                logger.debug("SMTP definition has not been modified")
-                self._smtp_config.load(os.path.join(
-                    "leap", "providers",
-                    self._provider_config.get_domain(),
-                    "smtp-service.json"))
-            else:
-                smtp_definition, mtime = get_content(res)
-
-                self._smtp_config.load(data=smtp_definition, mtime=mtime)
-                self._smtp_config.save(["leap",
-                                        "providers",
-                                        self._provider_config.get_domain(),
-                                        "smtp-service.json"])
-
-            download_config_data[self.PASSED_KEY] = True
-        except Exception as e:
-            download_config_data[self.PASSED_KEY] = False
-            download_config_data[self.ERROR_KEY] = "%s" % (e,)
-
-        logger.debug("Emitting download_config %s" % (download_config_data,))
-        self.download_config.emit(download_config_data)
-
-        return download_config_data[self.PASSED_KEY]
+        headers = {}
+        mtime = get_mtime(os.path.join(self._smtp_config
+                                       .get_path_prefix(),
+                                       "leap",
+                                       "providers",
+                                       self._provider_config.get_domain(),
+                                       "smtp-service.json"))
+
+        if self._download_if_needed and mtime:
+            headers['if-modified-since'] = mtime
+
+        # there is some confusion with this uri,
+        config_uri = "%s/%s/config/smtp-service.json" % (
+            self._provider_config.get_api_uri(),
+            self._provider_config.get_api_version())
+        logger.debug('Downloading SMTP config from: %s' % config_uri)
+
+        srp_auth = SRPAuth(self._provider_config)
+        session_id = srp_auth.get_session_id()
+        cookies = None
+        if session_id:
+            cookies = {"_session_id": session_id}
+
+        res = self._session.get(config_uri,
+                                verify=self._provider_config
+                                .get_ca_cert_path(),
+                                headers=headers,
+                                cookies=cookies)
+        res.raise_for_status()
+
+        # Not modified
+        if res.status_code == 304:
+            logger.debug("SMTP definition has not been modified")
+            self._smtp_config.load(os.path.join("leap",
+                                                "providers",
+                                                self._provider_config.get_domain(),
+                                                "smtp-service.json"))
+        else:
+            smtp_definition, mtime = get_content(res)
+
+            self._smtp_config.load(data=smtp_definition, mtime=mtime)
+            self._smtp_config.save(["leap",
+                                    "providers",
+                                    self._provider_config.get_domain(),
+                                    "smtp-service.json"])
 
     def run_smtp_setup_checks(self,
-                              checker,
                               provider_config,
                               smtp_config,
                               download_if_needed=False):
         """
         Starts the checks needed for a new smtp setup
 
-        :param checker: Object that executes actions in a different
-                        thread
-        :type checker: leap.util.checkerthread.CheckerThread
         :param provider_config: Provider configuration
         :type provider_config: ProviderConfig
         :param smtp_config: SMTP configuration to populate
@@ -164,6 +128,8 @@ class SMTPBootstrapper(QtCore.QObject):
         self._smtp_config = smtp_config
         self._download_if_needed = download_if_needed
 
-        checker.add_checks([
-            self._download_config
-        ])
+        cb_chain = [
+            (self._download_config, self.download_config),
+        ]
+
+        self.addCallbackChain(cb_chain)