Working in-process cache

mercurial_keyring.py

@@ -1,74 +1,105 b''
 # -*- coding: utf-8 -*-
 
 """
 Storing HTTP authentication passwords in keyring database.
 
 Installation method(s):
 
 1) in ~/.hgrc (or /etc/hgext/...)
 
 [extensions]
 ...
 hgext.mercurial_keyring = /path/to/mercurial_keyring.py
 
 
 2) Drop this file to hgext directory and in ~/.hgrc
 
 [extensions]
 hgext.mercurial_keyring =
 
 """
 
 from mercurial import hg, repo, util
 from mercurial.i18n import _
 try:
 	from mercurial.url import passwordmgr
 except:
 	from mercurial.httprepo import passwordmgr
 
 import keyring
 import getpass
 from urlparse import urlparse
 
 KEYRING_SERVICE = "Mercurial"
 
+############################################################
+
+def monkeypatch_class(name, bases, namespace):
+    """http://mail.python.org/pipermail/python-dev/2008-January/076194.html"""
+    assert len(bases) == 1, "Exactly one base class required"
+    base = bases[0]
+    for name, value in namespace.iteritems():
+        if name != "__metaclass__":
+           setattr(base, name, value)
+    return base
+
 def monkeypatch_method(cls):
     def decorator(func):
         setattr(cls, func.__name__, func)
         return func
     return decorator
 
+############################################################
+
+class PasswordStore(object):
+    """
+    Helper object handling password save&restore. Passwords
+    are saved both in local memory cache, and keyring, and are
+    restored from those.
+    """
+    def __init__(self):
+        self.cache = dict()
+    def save_password(self, url, username, password):
+        self.cache[url] = (username, password)
+        # TODO: keyring save
+    def get_password(self, url):
+        r = self.cache.get(url)    
+        if r:
+           return r
+        # TODO: keyring restore
+        return None, None
+
+password_store = PasswordStore()
+
+############################################################
+
 @monkeypatch_method(passwordmgr)
 def find_user_password(self, realm, authuri):
     """
     keyring-based implementation of username/password query
 
     Passwords are saved in gnome keyring, OSX/Chain or other platform
     specific storage and keyed by the repository url
     """
     # Calculate the true url. authuri happens to contain things like
     # https://repo.machine.com/repos/apps/module?pairs=0000000000000000000000000000000000000000-0000000000000000000000000000000000000000&cmd=between
     parsed_url = urlparse(authuri)
     base_url = "%s://%s%s" % (parsed_url.scheme, parsed_url.netloc, parsed_url.path)
     print "find_user_password", realm, base_url
     
-
-    # TODO: odczyt danych z cache w procesie
-
-    # TODO: odczyt danych już obecnych w keyring-u
+    user, pwd = password_store.get_password(base_url)
+    if user and pwd:
+       return user, pwd
 
     if not self.ui.interactive():
        raise util.Abort(_('mercurial_keyring: http authorization required'))
     self.ui.write(_("http authorization required\n"))
     self.ui.status(_("realm: %s, url: %s\n" % (realm, base_url)))
-    username = self.ui.prompt(_("user:"), default = None)
-    password = self.ui.getpass(_("password for user %s:" % username))
-    
-    # TODO: zapis w keyringu
+    user = self.ui.prompt(_("user:"), default = user)
+    pwd = self.ui.getpass(_("password: "))
 
-    # TODO: zapis w cache w procesie
+    password_store.save_password(base_url, user, pwd)
 
-
-    return username, password
+    return user, pwd
     #return None, None