Add a simple version check mechanism to warn the user if a new release is available.

web/config.py

@@ -172,6 +172,16 @@ SECURITY_EMAIL_SUBJECT_PASSWORD_NOTICE = "Your %s password has been reset" \
 SECURITY_EMAIL_SUBJECT_PASSWORD_CHANGE_NOTICE = \
         "Your password for %s has been changed" % APP_NAME
 
+##########################################################################
+# Upgrade checks
+##########################################################################
+
+# Check for new versions of the application?
+UPGRADE_CHECK_ENABLED = True
+
+# Where should we get the data from?
+UPGRADE_CHECK_URL = 'http://www.pgadmin.org/versions.json'
+
 ##########################################################################
 # Local config settings
 ##########################################################################

web/pgadmin/browser/__init__.py

@@ -12,12 +12,20 @@ from pgadmin import current_blueprint
 from pgadmin.utils import PgAdminModule
 from pgadmin.utils.ajax import make_json_response
 from pgadmin.settings import get_setting
-from flask import current_app, render_template, url_for, make_response
+from flask import current_app, render_template, url_for, make_response, \
+     Response, flash
 from flask.ext.security import login_required
 from flask.ext.login import current_user
 from flask.ext.babel import gettext
 from flask_gravatar import Gravatar
-import six
+import json, six
+
+import config
+
+try:
+    import urllib.request as urlreq
+except:
+    import urllib as urlreq
 
 MODULE_NAME = 'browser'
 
@@ -280,6 +288,34 @@ def index():
                         force_default=False,
                         use_ssl=False,
                         base_url=None)
+
+    # Get the current version info from the website, and flash a message if
+    # the user is out of date, and the check is enabled.
+    if config.UPGRADE_CHECK_ENABLED:
+        data = None
+        url = '%s?version=%s' % (config.UPGRADE_CHECK_URL, config.APP_VERSION)
+        current_app.logger.debug('Checking version data at: %s' % url)
+
+        try:
+            response = urlreq.urlopen(url)
+            current_app.logger.debug('Version check HTTP response code: %d' % response.getcode())
+
+            if response.getcode() == 200:
+                data = json.load(response)
+                current_app.logger.debug('Response data: %s' % data)
+        except:
+            pass
+
+        if data != None:
+            if data['pgadmin4']['version'] != config.APP_VERSION:
+                msg = render_template(MODULE_NAME + "/upgrade.html",
+                                      current_version=config.APP_VERSION,
+                                      upgrade_version=data['pgadmin4']['version'],
+                                      product_name=config.APP_NAME,
+                                      download_url=data['pgadmin4']['download_url'])
+
+            flash(msg, 'warning')
+
     return render_template(
             MODULE_NAME + "/index.html",
             username=current_user.email,

web/pgadmin/browser/templates/browser/messages.html

@@ -4,7 +4,7 @@
       {% for category, message in messages %}
       <div class="alert alert-{{ category }} alert-dismissible" role="alert">
         <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
-        {{ message }}
+        {{ message|safe }}
       </div>
       {% endfor %}
     </div>

web/pgadmin/browser/templates/browser/upgrade.html

@@ -0,0 +1,2 @@
+<p>{{ _('You are currently running version {0} of {1}, however the current version is {2}.').format(current_version, product_name, upgrade_version) }}</p>
+<p>{{ _('Please click <a class="alert-link" href="{0}" target="_new">here</a> for more information.').format(download_url) }}</p>