Rework 6538573, actually fixes the issue

[mpd-sima.git] / sima / utils / utils.py

diff --git a/sima/utils/utils.py b/sima/utils/utils.py
index 017af9fd4b96ded621c9a31bfec0c8affac98ac3..8a63f1be291a92d2df863abe15bce0c12da360ac 100644 (file)
--- a/sima/utils/utils.py
+++ b/sima/utils/utils.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 #
-# Copyright (c) 2010, 2011, 2013 Jack Kaliko <kaliko@azylum.org>
+# Copyright (c) 2010, 2011, 2013, 2014, 2015 Jack Kaliko <kaliko@azylum.org>
 #
 #  This file is part of sima
 #
@@ -18,15 +18,32 @@
 #  along with sima.  If not, see <http://www.gnu.org/licenses/>.
 #
 #
-"""generic tools and utilitaries for sima
+"""generic tools and utilities for sima
 """
+# pylint: disable=C0111
 
+import logging
 import traceback
 import sys
 
-from argparse import (ArgumentError, Action)
-from os import (environ, access, getcwd, W_OK, R_OK)
-from os.path import (dirname, isabs, join, normpath, exists, isdir, isfile)
+from argparse import ArgumentError, Action
+from base64 import b64decode as push
+from codecs import getencoder
+from datetime import datetime
+from os import environ, access, getcwd, W_OK, R_OK
+from os.path import dirname, isabs, join, normpath, exists, isdir, isfile
+from time import sleep
+
+
+def getws(dic):
+    """
+    Decode Obfuscated api key.
+    Only preventing API keys harvesting over the network
+    https://developer.echonest.com/forums/thread/105
+    """
+    aka = push(bytes(dic.get('apikey') + '=', 'utf-8'))
+    aka = getencoder('rot-13')(str((aka), 'utf-8'))[0]
+    dic.update({'apikey':aka})
 
 def get_mpd_environ():
     """
@@ -53,8 +70,7 @@ def normalize_path(path):
 
 def exception_log():
     """Log unknown exceptions"""
-    import logging
-    log = logging.getLogger('sima')
+    log = logging.getLogger(__name__)
     log.error('Unhandled Exception!!!')
     log.error(''.join(traceback.format_exc()))
     log.info('Please report the previous message'
@@ -64,6 +80,10 @@ def exception_log():
     sys.exit(1)
 
 
+class SigHup(Exception):
+    """SIGHUP raises this Exception"""
+    pass
+
 # ArgParse Callbacks
 class Obsolete(Action):
     # pylint: disable=R0903
@@ -73,7 +93,7 @@ class Obsolete(Action):
         raise ArgumentError(self, 'obsolete argument')
 
 class FileAction(Action):
-    """Generic class to inherit from for ARgPArse action on file/dir
+    """Generic class to inherit from for ArgParse action on file/dir
     """
     # pylint: disable=R0903
     def __call__(self, parser, namespace, values, option_string=None):
@@ -93,9 +113,11 @@ class Wfile(FileAction):
     """Is file writable
     """
     def checks(self):
+        if isdir(self._file):
+            self.parser.error('need a file not a directory: {}'.format(self._file))
         if not exists(self._dir):
             #raise ArgumentError(self, '"{0}" does not exist'.format(self._dir))
-            self.parser.error('file does not exist: {0}'.format(self._dir))
+            self.parser.error('directory does not exist: {0}'.format(self._dir))
         if not exists(self._file):
             # Is parent directory writable then
             if not access(self._dir, W_OK):
@@ -128,6 +150,35 @@ class Wdir(FileAction):
         if not access(self._file, W_OK):
             self.parser.error('no write access to "{0}"'.format(self._file))
 
+class Throttle:
+    """throttle decorator"""
+    def __init__(self, wait):
+        self.wait = wait
+        self.last_called = datetime.now()
+
+    def __call__(self, func):
+        def wrapper(*args, **kwargs):
+            while self.last_called + self.wait > datetime.now():
+                sleep(0.1)
+            result = func(*args, **kwargs)
+            self.last_called = datetime.now()
+            return result
+        return wrapper
+
+# http client exceptions (for webservices)
+
+class WSError(Exception):
+    pass
+
+class WSNotFound(WSError):
+    pass
+
+class WSTimeout(WSError):
+    pass
+
+class WSHTTPError(WSError):
+    pass
+
 
 # VIM MODLINE
 # vim: ai ts=4 sw=4 sts=4 expandtab