Authenticate error on "GET users/lookup" using TWRequest(API v1.1)

[darjjeelling]

Hello,
I’m trying the API version1.1 using TWRequest on iOS5.
Only if I call “GET users/lookup” API, received the following authenticate error.

<Send>
GET https://api.twitter.com/1.1/users/lookup.json?user_id=xxx,yyy,zzz&include_entities=true
<Receive>
errors =     (
{
           code = 32;
           message = "Could not authenticate you";
}
);

---

But if I call other API, e.g. friendships/create, in the same way(use the same source code except URL), it worked correctly!!

How can I avoid this error? I have no idea how should I do.
Anyone else with same situation or investigate it?
Thanks in advance.

[episod]

Thanks for the report. Do you know how the commas are getting encoded when executing the request this way? Have you tried a POST request? TWRequest may expect you to prepare your request with %2C on the query string for commas instead.

v1.1’s OAuth is a bit stricter over all, though it should actually be pretty lenient around comma use.

[darjjeelling]

Thanks, Taylor.

The commas were not encoded as you indicated and fixed the code as following, it worked!
Thank you for your quick reply and kindness.

NSString *url_str_enc = (NSString *)CFURLCreateStringByAddingPercentEscapes(
kCFAllocatorDefault,
(CFStringRef)url_str,
NULL,
CFSTR(","),
kCFStringEncodingUTF8
);
NSURL *url = [NSURL URLWithString:url_str_enc];
TWRequest *request = [[TWRequest alloc] initWithURL:url parameters:nil
requestMethod:TWRequestMethodGET];

[karuna2302]

we tried the similar approach for,
http://api.twitter.com/1.1/users/show.json
in our code its return,
errors = (
{
code = 215;
message = “Bad Authentication data”;
}
);
pls help to resolve.

[anhdoanvan]

me too