Implement login caching for Chrome

.gitignore

@@ -58,3 +58,4 @@ target/
 # appp specific folders
 bin/
 default_out_path/
+_browser_user_data_dir/

echo360/downloader.py

@@ -6,7 +6,7 @@
 
 from .course import EchoCloudCourse
 from .echo_exceptions import EchoLoginError
-from .utils import naive_versiontuple
+from .utils import naive_versiontuple, PERSISTENT_SESSION_FOLDER
 
 
 from pick import pick
@@ -22,13 +22,21 @@
 
 
 def build_chrome_driver(
-    use_local_binary, selenium_version_ge_4100, setup_credential, user_agent, log_path
+    use_local_binary,
+    selenium_version_ge_4100,
+    setup_credential,
+    user_agent,
+    log_path,
+    persistent_session,
 ):
     from selenium.webdriver.chrome.options import Options
 
     opts = Options()
     if not setup_credential:
         opts.add_argument("--headless")
+    if persistent_session:
+        folder_path = PERSISTENT_SESSION_FOLDER  # default current dir
+        opts.add_argument("--user-data-dir={}".format(folder_path))
     opts.add_argument("--window-size=1920x1080")
     opts.add_argument("user-agent={}".format(user_agent))
 
@@ -62,8 +70,18 @@ def build_chrome_driver(
 
 
 def build_firefox_driver(
-    use_local_binary, selenium_version_ge_4100, setup_credential, user_agent, log_path
+    use_local_binary,
+    selenium_version_ge_4100,
+    setup_credential,
+    user_agent,
+    log_path,
+    persistent_session,
 ):
+    if persistent_session:
+        raise NotImplementedError(
+            "Save-login not implemented for Firefox! Feel free to make a PR for it..."
+        )
+
     profile = webdriver.FirefoxProfile()
     profile.set_preference("general.useragent.override", user_agent)
     kwargs = dict()
@@ -95,8 +113,18 @@ def build_firefox_driver(
 
 
 def build_phantomjs_driver(
-    use_local_binary, selenium_version_ge_4100, setup_credential, user_agent, log_path
+    use_local_binary,
+    selenium_version_ge_4100,
+    setup_credential,
+    user_agent,
+    log_path,
+    persistent_session,
 ):
+    if persistent_session:
+        raise NotImplementedError(
+            "Save-login not implemented for Firefox! Feel free to make a PR for it..."
+        )
+
     dcap = dict()
     dcap.update(DesiredCapabilities.PHANTOMJS)
     dcap["phantomjs.page.settings.userAgent"] = (
@@ -128,6 +156,7 @@ def __init__(
         use_local_binary=False,
         webdriver_to_use="phantomjs",
         interactive_mode=False,
+        persistent_session=False,
     ):
         self._course = course
         root_path = os.path.dirname(os.path.abspath(sys.modules["__main__"].__file__))
@@ -175,6 +204,7 @@ def __init__(
             setup_credential=setup_credential,
             user_agent=self._useragent,
             log_path=log_path,
+            persistent_session=persistent_session,
         )
 
         self.setup_credential = setup_credential

echo360/main.py

@@ -20,6 +20,7 @@
 from .echo_exceptions import EchoLoginError
 from .downloader import EchoDownloader
 from .course import EchoCourse, EchoCloudCourse
+from .utils import PERSISTENT_SESSION_FOLDER
 
 _DEFAULT_BEFORE_DATE = datetime(2900, 1, 1).date()
 _DEFAULT_AFTER_DATE = datetime(1100, 1, 1).date()
@@ -94,6 +95,17 @@ def handle_args():
                                 any website to obtain credentials needed before proceeding. \
                                 (implies using chrome-driver)",
     )
+    parser.add_argument(
+        "--persistent-session",
+        "-P",
+        action="store_true",
+        default=False,
+        dest="persistent_session",
+        help="Starts a persistent session (helps to store credentials). Session uses \
+            '{}' folder, and currently only supports chrome driver.".format(
+            PERSISTENT_SESSION_FOLDER
+        ),
+    )
     parser.add_argument(
         "--download-phantomjs-binary",
         action="store_true",
@@ -231,6 +243,7 @@ def handle_args():
         not args["auto"],
         args["alternative_feeds"],
         args["echo360cloud"],
+        args["persistent_session"],
     )
 
 
@@ -251,6 +264,7 @@ def main():
         manual,
         alternative_feeds,
         usingEcho360Cloud,
+        persistent_session,
     ) = handle_args()
 
     setup_logging(enable_degbug)
@@ -344,6 +358,7 @@ def cmd_exists(x):
         use_local_binary=use_local_binary,
         webdriver_to_use=webdriver_to_use,
         interactive_mode=interactive_mode,
+        persistent_session=persistent_session,
     )
 
     _LOGGER.debug(

echo360/utils.py

@@ -4,3 +4,6 @@ def naive_versiontuple(v):
     Expects naive_versiontuple('xx.yy.zz') < naive_versiontuple('aa.bb.cc').
     """
     return tuple(map(int, (v.split("."))))
+
+
+PERSISTENT_SESSION_FOLDER = "_browser_persistent_session"