move towards user-data being binary

UrlResponse: biggest change... make readurl return bytes, making user
             know what to do with it.
util: add load_tfile_or_url for loading text file or url
      as  read_file_or_url now returns bytes

ec2_utils: all meta-data is text, remove non-obvious string translations
DigitalOcean: adjust for ec2_utils

DataSourceGCE, DataSourceMAAS: user-data is binary other fields are text.
openstack.py: read paths without decoding to text.  This is ok as paths
              other than user-data are json, and load_json will handle

load_file still returns text, and that is what most things use.

1 files changed, 6 insertions, 2 deletions

diff --git a/cloudinit/sources/DataSourceDigitalOcean.py b/cloudinit/sources/DataSourceDigitalOcean.py
index 76ddaa9d..5d47564d 100644
--- a/cloudinit/sources/DataSourceDigitalOcean.py
+++ b/cloudinit/sources/DataSourceDigitalOcean.py
@@ -54,9 +54,13 @@ class DataSourceDigitalOcean(sources.DataSource):
     def get_data(self):
         caller = functools.partial(util.read_file_or_url,
                                    timeout=self.timeout, retries=self.retries)
-        md = ec2_utils.MetadataMaterializer(str(caller(self.metadata_address)),
+
+        def mcaller(url):
+            return caller(url).contents
+
+        md = ec2_utils.MetadataMaterializer(mcaller(self.metadata_address),
                                             base_url=self.metadata_address,
-                                            caller=caller)
+                                            caller=mcaller)
 
         self.metadata = md.materialize()