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forked from ScoDoc/ScoDoc
ScoDoc/app/scodoc/notes_log.py

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# -*- mode: python -*-
# -*- coding: utf-8 -*-
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import os
import re
import inspect
import time
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import traceback
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.header import Header
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from flask import current_app
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"""Simple & stupid file logguer, used only to debug
(logging to SQL is done in scolog)
"""
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LOG_FILENAME = "notes.log" # empty to disable logging
DEFAULT_LOG_DIR = "/tmp" # clients should call set_log_directory to change this
ALARM_DESTINATION = "emmanuel.viennet@univ-paris13.fr" # XXX a mettre en preference
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class _logguer(object):
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def __init__(self):
self.file = None
self.directory = None
self.set_log_directory(DEFAULT_LOG_DIR)
def set_log_directory(self, directory):
if self.directory != directory and self.file:
# changing directory when a log is already open: close it
self.file.close()
self.file = None
self.directory = directory
def _open(self):
if LOG_FILENAME:
path = os.path.join(self.directory, LOG_FILENAME)
self.file = open(path, "a")
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self("new _logguer (%s)" % path)
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else:
self.file = None # logging disabled
def __call__(self, msg):
if not self.file:
self._open()
if self.file:
dept = retreive_dept()
if dept:
dept = " (%s)" % dept
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msg = dept + " " + msg
self.file.write("[%s]%s\n" % (time.strftime("%a %b %d %H:%M:%S %Y"), msg))
if current_app:
current_app.logger.info(msg)
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self.file.flush()
log = _logguer()
def retreive_request(skip=0):
"""Try to retreive a REQUEST variable in caller stack.
This is a hack, used only in log functions.
"""
def search(frame):
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if "REQUEST" in frame.f_locals:
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return frame.f_locals["REQUEST"]
if frame.f_back:
return search(frame.f_back)
else:
return None
frame = inspect.currentframe()
if frame: # not supported by all pythons
startframe = frame
while skip and startframe.f_back:
startframe = startframe.f_back
return search(startframe)
else:
return None
def retreive_dept():
"""Try to retreive departement (from REQUEST URL)"""
REQUEST = retreive_request()
if not REQUEST:
return ""
try:
url = REQUEST.URL
m = re.match(r"^.*ScoDoc/(\w+).*$", url)
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return m.group(1)
except:
return ""
# Alarms by email:
def sendAlarm(context, subj, txt):
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from . import sco_utils
from . import sco_emails
from . import sco_preferences
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msg = MIMEMultipart()
subj = Header(subj, sco_utils.SCO_ENCODING)
msg["Subject"] = subj
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msg["From"] = sco_preferences.get_preference(context, "email_from_addr")
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msg["To"] = ALARM_DESTINATION
msg.epilogue = ""
txt = MIMEText(txt, "plain", sco_utils.SCO_ENCODING)
msg.attach(txt)
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sco_emails.sendEmail(context, msg)
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# Debug: log call stack
def logCallStack():
log("Call stack:\n" + "\n".join(x.strip() for x in traceback.format_stack()[:-1]))