oauth requests with URL realms result in function_clause error in HTTP request
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                 Key: COUCHDB-1144
                 URL: https://issues.apache.org/jira/browse/COUCHDB-1144
             Project: CouchDB
          Issue Type: Bug
          Components: HTTP Interface
    Affects Versions: 1.0.2, 1.1
         Environment: OSX - branch 1.1 - r1095237
            Reporter: Joan Touzet
            Priority: Critical


As illustrated in this Wireshark packet dump, lines 53ff, any OAuth request 
with a URL as the realm will return a 500 error:
http://friendpaste.com/3vXPjHP6s7dLZjsj7DOfSH 

Erlang stacktrace is similar to:

[error] [<0.189.0>] function_clause error in HTTP request [Wed, 27 Apr 2011 
23:31:46 GMT] [info] [<0.189.0>] Stacktrace:
[{oauth_uri,decode, ["://127.0.0.1:5984","ptth"]},
                                {oauth_uri,param_from_header_string,1},
                                {oauth_uri,
                                    '-params_from_header_string/1-lc$^0/1-0-',
                                    1},
                                {couch_httpd_oauth,serve_oauth,3},
                                {couch_httpd,authenticate_request,2},
                                {couch_httpd,handle_request_int,5},
                                {mochiweb_http,headers,5},
                                {proc_lib,init_p_do_apply,3}] [Wed, 27 Apr 2011 
23:31:46 GMT] [info] [<0.189.0>] 127.0.0.1 - - 'PUT'
/test_c_project/16f74c25-d641-4710-8f38-18295a8a69b1 500

Chatted with benoitc today and he suggested this may be because the realm is 
not being properly encoded before being passed on.

By default, some OAuth libraries such as python's popular oauth2 library always 
set the realm of a request to the URL of the resource being accessed, such as 
http://localhost:5984/ . (In fact, oauth2 library does not support overriding 
this setting.) The OAuth spec @ http://oauth.net/core/1.0/ also shows realms 
specified as URLs.  RFC5849 states "The OPTIONAL "realm" parameter MAY be added 
and interpreted per [RFC2617] section 1.2.", which in turn says the realm is 
any quoted-string.

It seems that this may already be fixed in trunk simply because trunk has a 
newer version of the upstream erlang-oauth.

A JS test could be added in futon to validate this by modifying function 
oauthRequest to accept a realm parameter, then passing that down to 
OAuth.getAuthorizationHeader on line 56. 

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