Tarball the config and give it to the front end

Download file as blob to avoid binary string encoding

config_app/config_endpoints/api/tar_config_loader.py

@@ -1,17 +1,53 @@
+import os
 import tarfile
 
-from flask import request, make_response
+from flask import request, make_response, send_file
 
 from data.database import configure
+from util.config.validator import EXTRA_CA_DIRECTORY
 
 from config_app.c_app import app, config_provider
 from config_app.config_endpoints.api import resource, ApiResource, nickname
 
 @resource('/v1/configapp/tarconfig')
 class TarConfigLoader(ApiResource):
-    """ Resource for validating a block of configuration against an external service. """
+    """
+    Resource for dealing with configuration as a tarball,
+    including loading and generating functions
+    """
 
-    @nickname('uploadTarballConfig')
+    @nickname('scGetConfigTarball')
+    def get(self):
+        config_path = config_provider.config_volume
+
+        # remove the initial trailing / from the prefix path, and add the last dir one
+        tar_dir_prefix = config_path[1:] + '/'
+
+        def tarinfo_filter(tarinfo):
+            # remove leading directory info
+            tarinfo.name = tarinfo.name.replace(tar_dir_prefix, '')
+
+            # ignore any directory that isn't the specified extra ca one:
+            if tarinfo.isdir() and not tarinfo.name == EXTRA_CA_DIRECTORY:
+                return None
+
+            return tarinfo
+
+        # Remove the tar if it already exists so we don't write on top of existing tarball
+        if os.path.isfile('quay-config.tar.gz'):
+            os.remove('quay-config.tar.gz')
+
+        tar = tarfile.open('quay-config.tar.gz', mode="w:gz")
+
+        for name in os.listdir(config_path):
+            tar.add(os.path.join(config_path, name), filter=tarinfo_filter)
+
+        tar.close()
+
+        return send_file('quay-config.tar.gz', mimetype='application/gzip',
+                     as_attachment=True, attachment_filename='quay-config.tar.gz')
+
+    @nickname('scUploadTarballConfig')
     def put(self):
         """ Loads tarball config into the config provider """
         input_stream = request.stream