Disable camo on enterprise.

CUSTOMER13 doesn't want it, and there's currently no nginx config
or configurable Camo URI, so it wouldn't work if image preview
were enabled.

(imported from commit 615d4a32acbc4d4d590f88cf4e7d45d8f49db1d3)

puppet/zulip/manifests/enterprise.pp

@@ -2,7 +2,6 @@ class zulip::enterprise {
   include zulip::base
   include zulip::app_frontend
   include zulip::postgres_appdb
-  include zulip::camo
 
   apt::key {"A529EF65":
     source  =>  "http://apt.zulip.com/enterprise.asc",

zerver/lib/bugdown/__init__.py

@@ -154,7 +154,7 @@ class InlineHttpsProcessor(markdown.treeprocessors.Treeprocessor):
                 continue
             digest = hmac.new(settings.CAMO_KEY, url, hashlib.sha1).hexdigest()
             encoded_url = url.encode("hex")
-            img.set("src", "https://external-content.zulipcdn.net/%s/%s" % (digest, encoded_url))
+            img.set("src", "%s%s/%s" % (settings.CAMO_URI, digest, encoded_url))
 
 class InlineInterestingLinkProcessor(markdown.treeprocessors.Treeprocessor):
     def is_image(self, url):
@@ -714,6 +714,8 @@ class Bugdown(markdown.Extension):
                                  "_begin")
 
         md.treeprocessors.add("inline_interesting_links", InlineInterestingLinkProcessor(md), "_end")
+
+        if settings.CAMO_URI:
             md.treeprocessors.add("rewrite_to_https", InlineHttpsProcessor(md), "_end")
 
         if self.getConfig("realm") == "mit.edu/zephyr_mirror":

zproject/local_settings.py

@@ -49,6 +49,8 @@ MANDRILL_API_KEY = 'xxxxxxxxxxxxxxxxxxxxxx'
 
 # This should be synced with our camo installation
 CAMO_KEY = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
+CAMO_URI = 'https://external-content.zulipcdn.net/'
+
 
 # Leave EMAIL_HOST unset or empty if you do not wish for emails to be sent
 EMAIL_HOST = 'smtp.gmail.com'

zproject/settings.py

@@ -261,6 +261,7 @@ DEFAULT_SETTINGS = {'TWITTER_CONSUMER_KEY': '',
                     'API_SUPER_USERS': set(),
                     'ADMINS': '',
                     'INLINE_IMAGE_PREVIEW': True,
+                    'CAMO_URI': None,
                     'ENABLE_FEEDBACK': True,
                     }