title: Posting to tumblr using API v2 on iOS returning error
body: <p>I recently got oAuth working for my iOS app to log in to Tumblr. Now I'm having trouble posting using the new API calls. I'm able to generate a request and prepare Autorization headers but I'm still getting errors.</p>
  
  <p>Here is my URL:</p>
  
  <blockquote>
    <p><a href="http://api.tumblr.com/v2/blog/my_blog.tumblr.com/post?tweet=no&amp;tags=my%2C%20app&amp;state=published&amp;type=text&amp;title=Hello&amp;body=I%2520finally%2520got%2520this%2520to%2520work" rel="noreferrer">http://api.tumblr.com/v2/blog/my_blog.tumblr.com/post?tweet=no&amp;tags=my%2C%20app&amp;state=published&amp;type=text&amp;title=Hello&amp;body=I%2520finally%2520got%2520this%2520to%2520work</a></p>
  </blockquote>
  
  <p>Here is my Authorization header with x's in place of sensitive info:</p>
  
  <blockquote>
    <p>Authorization = "OAuth realm=\"\", oauth_consumer_key=\"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\", oauth_token=\"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\", oauth_signature_method=\"HMAC-SHA1\", oauth_signature=\"XXXXXXXXXXXXXXXXXXXXXXXXX\", oauth_timestamp=\"1347656207\", oauth_nonce=\"XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX\", oauth_version=\"1.0\"";</p>
  </blockquote>
  
  <p>There error I receive:</p>
  
  <blockquote>
    <p>{"meta":{"status":400,"msg":"Bad Request"},"response":{"errors":["Post cannot be empty."]}}</p>
  </blockquote>
  
  <p>Does anyone have experience with this? I've been working at it for at least 20 hours over a two day period.</p>
  
  <p>Any help is greatly appreciated.</p>
  
  <p>EDIT: I've also tried including authorization data in the url (i.e., oauth_token, oauth_consumer_key), essentially the stuff found in the header. When I do this I get a 401 "Not Authorized" error, which I know isn't correct because I just successfully called "http://api.tumblr.com/v2/user/info" which requires a valid authorization. </p>
  
  <p>found solution, see explanation <a href="http://www.iphonedevsdk.com/forum/iphone-sdk-development/107860-using-oauth-with-tumblr.html#latest" rel="noreferrer">here</a>.</p>