Encode error messages before sending them to stdout

When an error with non-ascii characters is caught by glanceclient, it
fails at printing it and exists with a UnicodeEncodedError. This patch
encodes errors' messages using strutils before sending them to stdout.

Fixes bug: #1200206

Change-Id: I4dabcd76ffb258840bd6a66ad23c030f34960e86

1 files changed, 12 insertions, 0 deletions

diff --git a/glanceclient/common/utils.py b/glanceclient/common/utils.py
index 49976ac..c0e65db 100644
--- a/glanceclient/common/utils.py
+++ b/glanceclient/common/utils.py
@@ -202,3 +202,15 @@ def getsockopt(self, *args, **kwargs):
     lands in mainstream packages.
     """
     return self.fd.getsockopt(*args, **kwargs)
+
+
+def exception_to_str(exc):
+    try:
+        error = unicode(exc)
+    except UnicodeError:
+        try:
+            error = str(exc)
+        except UnicodeError:
+            error = ("Caught '%(exception)s' exception." %
+                     {"exception": exc.__class__.__name__})
+    return strutils.safe_encode(error, errors='ignore')