Added session_id in WebAuth

steam/webauth.py

@@ -79,6 +79,7 @@ class WebAuth(object):
     session = None  #: :class:`requests.Session` (with auth cookies after auth is complete)
     captcha_gid = -1
     steam_id = None  #: :class:`.SteamID` (after auth is complete)
+    _session_id = None
 
     def __init__(self, username, password):
         self.__dict__.update(locals())
@@ -118,6 +119,23 @@ class WebAuth(object):
 
         return resp
 
+    @property
+    def session_id(self):
+        if self._session_id:
+            return self._session_id
+        try:
+            headers = {
+                'X-Requested-With': 'com.valvesoftware.android.steam.community'}
+            self.session.get('https://steamcommunity.com/login',
+                              params={'oauth_client_id': 'DE45CD61',
+                                      'oauth_scope': 'read_profile write_profile read_client write_client'
+                                      },
+                              headers=headers, timeout=15)
+        except requests.exceptions.RequestException as e:
+            raise HTTPError(str(e))
+        self._session_id = self.session.cookies['sessionid']
+        return self._session_id
+
     def _load_key(self):
         if not self.key:
             resp = self.get_rsa_key(self.username)
@@ -251,17 +269,22 @@ class MobileWebAuth(WebAuth):
 class WebAuthException(Exception):
     pass
 
+
 class HTTPError(WebAuthException):
     pass
 
+
 class LoginIncorrect(WebAuthException):
     pass
 
+
 class CaptchaRequired(WebAuthException):
     pass
 
+
 class EmailCodeRequired(WebAuthException):
     pass
 
+
 class TwoFactorCodeRequired(WebAuthException):
     pass