What steps will reproduce the problem? 1. Http.add_credentials(u'username', u'password') 2. Set request body to utf8-encoded str 3. Execute request

What is the expected output? What do you see instead?

Expect either add_credentials to encode username and password to ut8, or to raise an exception. What happens instead is, it blows up on step 3 trying to concatenate unicode (headers) and str (body). The problem took some time to track down. Failing early at add_credentials() would help a lot.

What version of the product are you using? On what operating system?

httplib2 0.7.6 on Ubuntu 10.04.