Test con la libreria di logging

main.py

@@ -24,20 +24,28 @@ from io import BytesIO
 import shutil as sh
 import os
 import time
+import logging
 # Connection to remote library file
 import requests
 # Parsing of HTTP RFC 1123 datetime format
 from email.utils import parsedate_to_datetime
-
 # Our custom library (again no pun intended)
 import tcparser
-
+# Global variables and configurations
 import glob
 
+try:
+
+    # Start the logging library (to avoid printing on stdout)
+    # TODO
+    logging.basicConfig(filename='conf/tpdf.log', encoding='utf-8', level=logging.DEBUG)
+
     # Start CGI handling for webserver
     cgitb.enable()
     inputvars = cgi.FieldStorage()
 
+    logging.debug("Started CGI")
+
     print('Content-Type: text/json; charset=utf-8')
     print('Access-Control-Allow-Origin: *')
     print()
@@ -46,8 +54,10 @@ print()
 
     # Create output directory and temporary files if they do not exist
     if not os.path.exists(glob.conf['default']['outdir']):
+        logging.debug("missing outdir, creating...")
         os.mkdir(glob.conf['default']['outdir'])
     if not os.path.exists(glob.conf['default']['outdir'] + '/lastupdate.txt'):
+        logging.debug("missing lastupdate.txt, creating...")
         luh = open(glob.conf['default']['outdir'] + '/lastupdate.txt', 'w')
         luh.write('0')
         luh.close()
@@ -56,6 +66,8 @@ if not os.path.exists(glob.conf['default']['outdir'] + '/lastupdate.txt'):
     luh = open(glob.conf['default']['outdir'] + '/lastupdate.txt', 'r')
     lu = int(float(luh.read()))
     luh.close()
+    logging.info("last database update timestamp is %d" % lu)
+
 
     # Fetch last modified from HTTP header
     path = glob.conf['default']['path']
@@ -63,15 +75,19 @@ user = glob.conf['default']['user']
     pswd = glob.conf['default']['pswd']
     req  = requests.head(path, auth=(user, pswd))
 
+    logging.debug("fetched header from %s, returned code %d" % (path, req.status_code))
+
     cachefile = glob.conf['default']['outdir'] + "/tellico.xml"
 
     # If header fetch fails I can't update cache.
     # Try with current one, if exists
     if req.status_code == 200 and 'Last-modified' in req.headers:
-    mtime = parsedate_to_datetime(req.headers['Last-modified']).timestamp()
+        mtime = int(parsedate_to_datetime(req.headers['Last-modified']).timestamp())
+        logging.info("Tellico last modified timestamp is %d" % mtime)
 
         # If local xml is out-of-date or missing, try download it
         if int(lu) < int(mtime) or not os.path.isfile(cachefile):
+            logging.info("Out-of-date, updating")
             # Download Tellico .tc database
             req = requests.get(path, auth=(user, pswd))
             if req.status_code == 200 and req.content != None:    
@@ -80,8 +96,10 @@ if req.status_code == 200 and 'Last-modified' in req.headers:
                 zipHandler.extractall(glob.conf['default']['outdir'])
                 zipHandler.close()
                 luh = open(glob.conf['default']['outdir'] + '/lastupdate.txt', 'w')
-            luh.write(int(mtime))
+                luh.write(mtime)
                 luh.close()
+            else:
+                logging.error("Update failed")
 
     # Get a Python-friendly library struct from XML file
     library = tcparser.getLibrary(cachefile, lu)
@@ -103,3 +121,6 @@ result = tcparser.filter(library, title=title, author=author)
 
     # Wanna get a pretty JSON encoded library to do your nasty things offline at home? ;-)
     print(json.dumps(result, indent=4))
+
+except:
+    logging.fatal("Unexpected error:", sys.exc_info()[0])