title: Failed to get oauth_token for vimeo advanced api
body: <p>After wondering from everywhere, i need to ask about my question. 
  I want to access vimeo advanced api without user login. Application user directly can see videos or upload. </p>
  
  <p>Following code i'm using to get this functionality but i suffer from different kind of errors :</p>
  
  <pre><code>NSURL *url = [NSURL URLWithString:@"https://vimeo.com/api/rest/v2?format=json&amp;method=vimeo.oauth.checkAccessToken"];
  NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
  
  [request setHTTPMethod:@"GET"];
  
  __weak NSString *req = [NSString stringWithFormat:@"OAuth realm=%@, oauth_consumer_key=%@, oauth_version=%@, oauth_signature_method=%@, oauth_timestamp=%@, oauth_nonce=%@, oauth_token=%@, oauth_signature=%@ ", @"", @"409ca6030dfad27f133f22d48a9a40b7153c920d", @"1.0", @"HMAC-SHA1", @"1402387904", @"b8c8435e4aa9c9ae3f1c621e1c58c99f", @"f91469717363c5710271f6f3c2540f49", @"wOJIO9A2W5mFwDgiDvZbTSMK%2FPY%3D"];
  
  [request setValue:req forHTTPHeaderField:@"Authorization"];
  
  NSURLConnection *urlConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
  [urlConnection start];
  </code></pre>
  
  <p>I got response like : </p>
  
  <pre><code>err =     {
      code = 401;
      expl = "The oauth_signature passed was not valid.";
      msg = "Invalid signature";
  };
  </code></pre>
  
  <p>I already tried for oauth_signature and also different ways to achieve this task but then i got error for "Invalid Consumer Key".</p>
  
  <p>I need to solve this problem as soon as possible.
  Any help will be surely appreciated.</p>
  
  <p>Thanks in advance.</p>