Config API, session is used only when filesystem is not available for storing data

applications/admin/controllers/default.py

@@ -11,10 +11,11 @@ import re
 from gluon.admin import *
 from gluon.fileutils import abspath, read_file, write_file
 from gluon.utils import web2py_uuid
+from gluon.tools import Config
 from glob import glob
 import shutil
 import platform
-import ConfigParser
+
 try:
     import git
     if git.__version__ < '0.3.1':
@@ -561,16 +562,10 @@ def edit():
     """ File edit handler """
     # Load json only if it is ajax edited...
     app = get_app(request.vars.app)
-    admin_path = apath("admin", r=request)
+    app_path = apath(app, r=request)
     editor_defaults={'theme':'web2py'}
-    config = ConfigParser.ConfigParser(editor_defaults)
-    config.read( os.path.join(admin_path, 'settings.cfg') )
-    if not config.has_section('editor'):
-        config.add_section('editor')
-    if not( isinstance(session.editor_settings, dict) ):
-        preferences = dict(config.items('editor'))
-    else:
-        preferences = session.editor_settings
+    config = Config(os.path.join(app_path, 'settings.cfg'), section='editor', default_values=editor_defaults)
+    preferences = config.read()
 
     if not(request.ajax):
         # return the scaffolding, the rest will be through ajax requests
@@ -586,18 +581,14 @@ def edit():
                 editarea_preferences[key] = globals()[key]
         return response.render ('default/edit.html', dict(app=request.args[0], editor_settings=preferences, editarea_preferences=editarea_preferences))
 
-	# show settings tab and save prefernces
+    # show settings tab and save prefernces
     if 'settings' in request.vars:
         if request.post_vars:	#save new preferences
-            for option, value in request.post_vars.items():
-                config.set('editor', option, value)
-            try:			
-                config.write(open(os.path.join(admin_path, 'settings.cfg'), 'w'))
+            if config.save(request.post_vars.items()):
                 response.headers["web2py-component-flash"] = T('Preferences saved correctly')
-            except:
+            else:
                 response.headers["web2py-component-flash"] = T('Preferences saved on session only')	
-                session.editor_settings = dict(config.items('editor'))		
-            response.headers["web2py-component-command"] = "update_theme('%s'); jQuery('a[href=#editor_settings] button.close').click();" % config.get('editor', 'theme')
+            response.headers["web2py-component-command"] = "update_theme('%s'); jQuery('a[href=#editor_settings] button.close').click();" % config.read()['theme']
             return
         else:
             details = {'filename':'settings', 'id':'editor_settings', 'force': False}

gluon/tools.py

@@ -22,6 +22,7 @@ import urllib
 import urllib2
 import Cookie
 import cStringIO
+import ConfigParser
 from email import MIMEBase, MIMEMultipart, MIMEText, Encoders, Header, message_from_string, Charset
 
 from gluon.contenttype import contenttype
@@ -5643,6 +5644,37 @@ class Wiki(object):
         request = current.request
         return render(request.post_vars)
 
+class Config(object):
+    def __init__(
+        self,
+		filename,
+        section,
+        default_values={}
+    ):
+        self.config = ConfigParser.ConfigParser(default_values)
+        self.config.read(filename)
+        if not self.config.has_section(section):
+            self.config.add_section(section)
+        self.section  = section
+        self.filename = filename
+
+    def read(self):
+        if not( isinstance(current.session['settings_%s' % self.section], dict) ):
+            settings = dict(self.config.items(self.section))
+        else:
+            settings = current.session['settings_%s' % self.section]
+        return settings
+
+    def save(self, options):
+        for option, value in options:
+            self.config.set(self.section, option, value)
+        try:        
+            self.config.write(open(self.filename, 'w'))
+            result = True
+        except:
+            current.session['settings_%s' % self.section] = dict(self.config.items(self.section))		
+            result = False
+        return result
 
 if __name__ == '__main__':
     import doctest