From 3aae76170978a7557b0d7d2cbf10b3b856871538 Mon Sep 17 00:00:00 2001
From: ficus <ficus@robocracy.org>
Date: Sun, 25 Nov 2012 02:24:27 +0100
Subject: add tor (re)starts

---
 torouterui/templates/tor.html | 13 ++++++++++++-
 torouterui/tor.py             | 26 ++++++++++++++++++--------
 torouterui/util.py            |  2 +-
 torouterui/views.py           | 24 +++++++++++++++++++++---
 4 files changed, 52 insertions(+), 13 deletions(-)

diff --git a/torouterui/templates/tor.html b/torouterui/templates/tor.html
index 327ac59..3c7e340 100644
--- a/torouterui/templates/tor.html
+++ b/torouterui/templates/tor.html
@@ -2,6 +2,17 @@
 {% extends "base.html" %}
 {% block body %}
 
+{% if form == None %}
+<form action="/tor/" method="POST">
+Tor daemon should probably be restarted... are you certain?
+<br>
+<br>
+<button type="submit" class="btn btn-large btn-primary btn-warning" type="button" name="submit" value="Restart">
+Restart</button>
+</form>
+
+{% else %}
+
 <form action="/tor/" method="POST" class="form-horizontal">
 <legend>Tor Network Configuration</legend>
 
@@ -38,5 +49,5 @@
 Save</button>
 </div>
 </form>
-
+{% endif %}
 {% endblock %}
diff --git a/torouterui/tor.py b/torouterui/tor.py
index dd047ca..83ac866 100644
--- a/torouterui/tor.py
+++ b/torouterui/tor.py
@@ -88,18 +88,28 @@ def get_tor_settings():
     conn.close()
     return d
 
+def restart_tor():
+    grepcode = os.system("grep '^DisableNetwork 1' /etc/tor/torrc")
+    if grepcode == 512:
+        # permission denied
+        raise IOError("Don't have permission to read /etc/tor/torrc")
+    elif grepcode == 0:
+        pass # found
+    else:
+        if os.system('echo "DisableNetwork 1" >> /etc/tor/torrc') != 0:
+            raise IOError("Don't have permission to write /etc/tor/torrc")
+    util.enable_service('tor')
+    time.sleep(3)
+    conn = TorCtl.connect()
+    if not conn:
+        raise Exception("Could not start tor daemon!")
+    conn.close()
+
 def save_tor_settings(form):
     """Commit settings through torctl pipe, then send SAVECONF"""
     conn = TorCtl.connect()
     if not conn:
-        print "Warning: couldn't connect to tor daemon; need to boot up tor daemon in disabled state"
-        os.system('echo "DisableNetwork 1" >> /etc/tor/torrc')
-        # tor daemon should always be running, even if disabled
-        util.enable_service('tor')
-        time.sleep(3)
-        conn = TorCtl.connect()
-        if not conn:
-            raise Exception("Could not start tor daemon!")
+        raise Exception("couldn't connect to tor daemon; need to boot up tor daemon in disabled state")
 
     conn.set_option('RelayBandwidthRate',
                     "%dKB" % int(form['tor_relaybandwidthrateKBps']))
diff --git a/torouterui/util.py b/torouterui/util.py
index 16e7f57..78046da 100644
--- a/torouterui/util.py
+++ b/torouterui/util.py
@@ -20,7 +20,7 @@ def fs_read(path):
 
 def enable_service(name):
     #os.system('update-rc.d %s defaults &' % name)
-    subprocess.Popen(['service', name, 'start'], close_fds=True)
+    subprocess.Popen(['service', name, 'restart'], close_fds=True)
 
 def disable_service(name):
     """Currently, this is never actually called"""
diff --git a/torouterui/views.py b/torouterui/views.py
index f52a89b..9002348 100644
--- a/torouterui/views.py
+++ b/torouterui/views.py
@@ -199,14 +199,30 @@ def torpage():
     msg = list()
     status = dict()
     status['tor'] = tor.get_tor_status()
-    if request.method == 'GET':
+    # Check for reset first
+    if request.method == 'POST' and \
+            request.form.get('submit') == 'Restart':
+        try:
+            tor.restart_tor()
+            msg.append(("info",
+                "Reloading Tor daemon... please wait a minute then <a href='/tor'>revisit this page</a> (don't just reload)."),)  
+        except Exception, err:
+            msg.append(("error", err),)
+        return render_template('tor.html', form=None, status=status,
+            formerr=None, messages=msg)
+    # Then regular GET
+    if request.method == 'GET' or (request.method == 'POST' and \
+            request.form.get('submit') == 'Reset'):
         if status['tor']['state'] == 'DISABLED':
             msg.append(("warning",
-                "Could not connect to Tor daemon for control. Will try to restart daemon if settings are saved from this page."),)
+                "Could not connect to Tor daemon for control."),)
+            form = None
+        elif status['tor']['state'] == 'PERMISSION_DENIED':
+            msg.append(("error",
+                "Permission denied when connecting to Tor daemon for control."),)
             form = None
         else:
             form = tor.get_tor_settings()
-            print form
         return render_template('tor.html', form=form, status=status,
             formerr=None, messages=msg)
     # Got this far, need to validate form
@@ -225,6 +241,8 @@ def torpage():
             msg.append(("error",
                 "Was unable to commit changes...\"%s\""
                     % err))
+            return render_template('tor.html', settings=None, status=None,
+                form=request.form, formerr=None, messages=msg)
     return render_template('tor.html', settings=None, status=None,
         form=request.form, formerr=None, messages=msg)
 
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