Add full cacert support for all platforms also for the checksum.

Distinguish compiled and script case. Adjust .spec files

spec_files/Windows/artemis.spec

@@ -5,6 +5,7 @@ block_cipher = None
 import glob,os
 
 data_file = [(f, '.') for f in glob.glob('*.[pu][yi]') if f != "artemis.py"]
+data_file.append(('cacert.pem', '.'))
 
 a = Analysis(['artemis.py'],
              pathex=[os.getcwd()],

spec_files/macOS/Artemis.spec

@@ -5,6 +5,7 @@ import glob, os
 
 data_file = [(f, '.') for f in glob.glob('*.[pu][yi]') if f != "artemis.py"]
 data_file.append(('themes','./themes'))
+data_file.append(('cacert.pem', '.'))
 
 a = Analysis(['artemis.py'],
              pathex=[os.getcwd()],

src/artemis.py

@@ -43,7 +43,8 @@ from utilities import (checksum_ok,
                        is_undef_band,
                        format_numbers,
                        resource_path,
-                       safe_cast)
+                       safe_cast,
+                       is_mac_os)
 
 # import default_imgs_rc
 
@@ -1627,7 +1628,7 @@ class Artemis(QMainWindow, Ui_MainWindow):
 
 if __name__ == '__main__':
     # For executables running on Mac Os systems.
-    if hasattr(sys, "_MEIPASS") and sys.platform == 'darwin':
+    if hasattr(sys, "_MEIPASS") and is_mac_os():
         os.chdir(sys._MEIPASS)
 
     my_app = QApplication(sys.argv)

src/threads.py

@@ -4,13 +4,14 @@ from io import BytesIO
 from math import ceil
 import os.path
 from shutil import rmtree
+import sys
 from time import perf_counter
 from zipfile import ZipFile
 import aiohttp
 import urllib3
 from PyQt5.QtCore import QThread, pyqtSignal
 from constants import Constants, Database, ChecksumWhat
-from utilities import checksum_ok
+from utilities import checksum_ok, get_pool_manager
 
 # Needed for pyinstaller compilation.
 import encodings.idna
@@ -87,7 +88,7 @@ class DownloadThread(BaseDownloadThread):
         raw_data = bytes(0)
         sub_data = bytes(0)
         try:
-            self._db = urllib3.PoolManager(ca_certs = sys._MEIPASS + '/cacert.pem').request(
+            self._db = get_pool_manager().request(
                 'GET',
                 Database.LINK_LOC,
                 preload_content=False,

src/utilities.py

@@ -3,9 +3,8 @@ import hashlib
 import sys
 import os
 from pandas import read_csv
-
 from PyQt5.QtWidgets import QMessageBox
-
+import urllib3
 from constants import Constants, Signal, Database, ChecksumWhat
 
 
@@ -51,6 +50,20 @@ def pop_up(cls, title, text,
     return msg
 
 
+def is_mac_os():
+    """Return True if running OS is Mac."""
+    return sys.platform == 'darwin'
+
+
+def get_pool_manager():
+    """Return a urllib3.PoolManager object."""
+    if hasattr(sys, "_MEIPASS"):
+        ca_certs = os.path.join(sys._MEIPASS, 'cacert.pem')
+        return urllib3.PoolManager(ca_certs=ca_certs)
+    else:
+        return urllib3.PoolManager()
+
+
 def checksum_ok(data, what):
     """Check whether the checksum of the 'data' argument is correct."""
     code = hashlib.sha256()
@@ -62,10 +75,13 @@ def checksum_ok(data, what):
     else:
         raise ValueError("Wrong entry name.")
     try:
-        reference = read_csv(
+        # The downloaded file is a csv file with columns (last version == last line):
+        # data.zip_SHA256 | db.csv_SHA256 | Version | Creation_date
+        reference = get_pool_manager().request(
+            'GET',
             Database.LINK_REF,
-            delimiter=Database.DELIMITER
+            timeout=4.0
-        ).iat[-1, n]
+        ).data.decode("utf-8").splitlines()[-1].split(Database.DELIMITER)[n]
     except Exception:
         raise
     return code.hexdigest() == reference