Hey Jon:

*Q:
*  > BTW, are you deliberately *forbidding* upper-case letters?

*A:
*.  *Yes*, just like Google does, usernames are lowercase,
   although if your gmail username is
   *johnsmith*
   you can log in with
   *JohnSmith*, or
   *JOHNSMITH*, or
   *Johnsmith*
                etc.                     but there is ONLY ONE user.
  
  At least for my app, Just case lowercase names are best...
  user's have enough trouble remembering names without burden of 
case-sensitivity.
   
-------
So, with the of this forum, I think I have nearly completed
my Google-like Registration policy in web2py. I'll continue to test.

Here is code, entire file (based on simple app, is attached  db.py)

*Concern:*
I *hope* I'm restricting the length of password correctly?
 I just followed discussion on this forum.
 Note:
       Curiously, in version 1.99, the .insert works,
         where id didn't with username.
--

thanks all,
~ Rob

-----------------------

db.py....

from gluon.tools import Auth, Crud, Service, PluginManager, prettydate
auth = Auth(db, hmac_key=Auth.get_or_create_key())
crud, service, plugins = Crud(db), Service(), PluginManager()

## -  START CUSTOMIZATION  - - - - - - - - - - - - - - - - - - - - - - ##

# | Summary:
# |  Modify web2py to allow user registrations similar to 
# |  Google registrations.
# |  i.e. 
# |   - lower case only [a-z]
# |   - numbers [0-9] and period are OK
# |   - can't end in a period
# |   - can't start with a period
# |   - can't have consecutive periods
# |   - min 8 letter password
# |   - username can't be changed once registered
# |
# |  Note: Messages are nearly same as Google displays


## create all tables needed by auth if not custom tables 
#  use usernames rather than email addresses to register
auth.define_tables(username=True)

# allow username only on registration, but can only
# be viewed (readable) in Profile
# user can't change username once registered.

if auth.is_logged_in():
    db.auth_user.username.writable = False
    db.auth_user.username.readable = True


#custom message for password length - like Google
# ref:
"""
https://groups.google.com/forum/?fromgroups#!searchin/web2py/$20default$20length$20for$20password/web2py/k5os3bMz228/vG-UOLbhcBUJ[1-25]
"""
db.auth_user.password.requires.insert(0,IS_LENGTH(minsize=8))
db.auth_user.password.requires = CRYPT(key=auth.settings.hmac_key,min_length
=8)

#add a comments to exlain policy
db.auth_user.password.comment='minimum 8 letters'
db.auth_user.username.comment='min. 6 letters (a-z), you may use numbers, 
and periods.'

# apply nearly identical username policy and message that Google Accounts 
use.
# this OVERWRITES web2py's default username validation
# reference and thanks to web2py community for help:
#   
https://groups.google.com/forum/?fromgroups#!starred/web2py/HBODB00HMfU[1-25]

auth.settings.table_user.username.requires = [IS_LENGTH(30,6,'Please use 
between 6 and 30 characters.'),
    IS_MATCH('^[a-z0-9.]*$', error_message='Please use only letters (a-z) 
and numbers (0-9), and periods.'),
    IS_NOT_EMPTY(error_message='You can\'t leave this empty. '),
    IS_EXPR("value[0]<>'.'", error_message='The FIRST character of your 
username should be a letter (a-z) or number.'),
    IS_EXPR("value[-1]<>'.'", error_message='The LAST character of your 
username should be a letter (a-z) or number.'),
    IS_EXPR("str(value).find('..')==-1",error_message='A fan of 
punctuation! Alas, usernames can\'t have consecutive periods.'),
    IS_NOT_IN_DB(db, auth.settings.table_user.username, 'Someone already 
has that username. ') 
    ]
 
## -  END CUSTOMIZATION  - - - - - - - - - - - - - - - - - - - - - - ##


-- 



# -*- coding: utf-8 -*-

#########################################################################
## This scaffolding model makes your app work on Google App Engine too
## File is released under public domain and you can use without limitations
#########################################################################

## if SSL/HTTPS is properly configured and you want all HTTP requests to
## be redirected to HTTPS, uncomment the line below:
# request.requires_https()

if not request.env.web2py_runtime_gae:
    ## if NOT running on Google App Engine use SQLite or other DB
    db = DAL('sqlite://storage.sqlite')
else:
    ## connect to Google BigTable (optional 'google:datastore://namespace')
    db = DAL('google:datastore')
    ## store sessions and tickets there
    session.connect(request, response, db = db)
    ## or store session in Memcache, Redis, etc.
    ## from gluon.contrib.memdb import MEMDB
    ## from google.appengine.api.memcache import Client
    ## session.connect(request, response, db = MEMDB(Client()))

## by default give a view/generic.extension to all actions from localhost
## none otherwise. a pattern can be 'controller/function.extension'
response.generic_patterns = ['*'] if request.is_local else []
## (optional) optimize handling of static files
# response.optimize_css = 'concat,minify,inline'
# response.optimize_js = 'concat,minify,inline'

#########################################################################
## Here is sample code if you need for
## - email capabilities
## - authentication (registration, login, logout, ... )
## - authorization (role based authorization)
## - services (xml, csv, json, xmlrpc, jsonrpc, amf, rss)
## - old style crud actions
## (more options discussed in gluon/tools.py)
#########################################################################

from gluon.tools import Auth, Crud, Service, PluginManager, prettydate
auth = Auth(db, hmac_key=Auth.get_or_create_key())
crud, service, plugins = Crud(db), Service(), PluginManager()



## -  START CUSTOMIZATION  - - - - - - - - - - - - - - - - - - - - - - ##

# | Summary:
# |  Modify web2py to allow user registrations similar to 
# |  Google registrations.
# |  i.e. 
# |   - lower case only [a-z]
# |   - numbers [0-9] and period are OK
# |   - can't end in a period
# |   - can't start with a period
# |   - can't have consecutive periods
# |   - min 8 letter password
# |   - username can't be changed once registered
# |
# |  Note: Messages are nearly same as Google displays


## create all tables needed by auth if not custom tables 
#  use usernames rather than email addresses to register
auth.define_tables(username=True)

# allow username only on registration, but can only
# be viewed (readable) in Profile
# user can't change username once registered.

if auth.is_logged_in():
    db.auth_user.username.writable = False
    db.auth_user.username.readable = True


#custom message for password length - like Google
# ref:
"""
https://groups.google.com/forum/?fromgroups#!searchin/web2py/$20default$20length$20for$20password/web2py/k5os3bMz228/vG-UOLbhcBUJ[1-25]
"""
db.auth_user.password.requires.insert(0,IS_LENGTH(minsize=8))
db.auth_user.password.requires = CRYPT(key=auth.settings.hmac_key, min_length=8)

#add a comments to exlain policy
db.auth_user.password.comment='minimum 8 letters'
db.auth_user.username.comment='min. 6 letters (a-z), you may use numbers, and periods.'

# apply nearly identical username policy and message that Google Accounts use.
# this OVERWRITES web2py's default username validation
# reference and thanks to web2py community for help:
#   https://groups.google.com/forum/?fromgroups#!starred/web2py/HBODB00HMfU[1-25]

auth.settings.table_user.username.requires = [IS_LENGTH(30,6,'Please use between 6 and 30 characters.'),
    IS_MATCH('^[a-z0-9.]*$', error_message='Please use only letters (a-z) and numbers (0-9), and periods.'),
    IS_NOT_EMPTY(error_message='You can\'t leave this empty. '),
    IS_EXPR("value[0]<>'.'", error_message='The FIRST character of your username should be a letter (a-z) or number.'),
    IS_EXPR("value[-1]<>'.'", error_message='The LAST character of your username should be a letter (a-z) or number.'),
    IS_EXPR("str(value).find('..')==-1",error_message='A fan of punctuation! Alas, usernames can\'t have consecutive periods.'),
    IS_NOT_IN_DB(db, auth.settings.table_user.username, 'Someone already has that username. ') 
    ]
 
## -  END CUSTOMIZATION  - - - - - - - - - - - - - - - - - - - - - - ##
 

## configure email
mail=auth.settings.mailer
mail.settings.server = 'logging' or 'smtp.gmail.com:587'
mail.settings.sender = 'y...@gmail.com'
mail.settings.login = 'username:password'

## configure auth policy
auth.settings.registration_requires_verification = False
auth.settings.registration_requires_approval = False
auth.settings.reset_password_requires_verification = True

## if you need to use OpenID, Facebook, MySpace, Twitter, Linkedin, etc.
## register with janrain.com, write your domain:api_key in private/janrain.key
from gluon.contrib.login_methods.rpx_account import use_janrain
use_janrain(auth,filename='private/janrain.key')

#########################################################################
## Define your tables below (or better in another model file) for example
##
## >>> db.define_table('mytable',Field('myfield','string'))
##
## Fields can be 'string','text','password','integer','double','boolean'
##       'date','time','datetime','blob','upload', 'reference TABLENAME'
## There is an implicit 'id integer autoincrement' field
## Consult manual for more options, validators, etc.
##
## More API examples for controllers:
##
## >>> db.mytable.insert(myfield='value')
## >>> rows=db(db.mytable.myfield=='value').select(db.mytable.ALL)
## >>> for row in rows: print row.id, row.myfield
#########################################################################

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