X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/da51b9328abab2df757ed13eadc7c3557315094b..4f1085f353d44600643a8e9dd6b43a39131e7946:/sdk/python/arvados/api.py

diff --git a/sdk/python/arvados/api.py b/sdk/python/arvados/api.py
index 4413167c31..699c319651 100644
--- a/sdk/python/arvados/api.py
+++ b/sdk/python/arvados/api.py
@@ -19,6 +19,10 @@ class CredentialsFromEnv(object):
         from httplib import BadStatusLine
         if 'headers' not in kwargs:
             kwargs['headers'] = {}
+
+        if config.get("ARVADOS_EXTERNAL_CLIENT", "") == "true":
+            kwargs['headers']['X-External-Client'] = '1'
+
         kwargs['headers']['Authorization'] = 'OAuth2 %s' % config.get('ARVADOS_API_TOKEN', 'ARVADOS_API_TOKEN_not_set')
         try:
             return self.orig_http_request(uri, **kwargs)
@@ -55,13 +59,13 @@ def http_cache(data_type):
         path = None
     return path
 
-def api(version=None):
+def api(version=None, cache=True):
     global services
 
     if 'ARVADOS_DEBUG' in config.settings():
         logging.basicConfig(level=logging.DEBUG)
 
-    if not services.get(version):
+    if not cache or not services.get(version):
         apiVersion = version
         if not version:
             apiVersion = 'v1'
@@ -80,12 +84,12 @@ def api(version=None):
             ca_certs = None             # use httplib2 default
 
         http = httplib2.Http(ca_certs=ca_certs,
-                             cache=http_cache('discovery'))
+                             cache=(http_cache('discovery') if cache else None))
         http = credentials.authorize(http)
         if re.match(r'(?i)^(true|1|yes)$',
                     config.get('ARVADOS_API_HOST_INSECURE', 'no')):
             http.disable_ssl_certificate_validation=True
         services[version] = apiclient.discovery.build(
             'arvados', apiVersion, http=http, discoveryServiceUrl=url)
+        http.cache = None
     return services[version]
-