Last modified: 2010-05-15 16:02:56 UTC
I tried to POST the parameters, but it returns <error code="help" info=""> with the autogenerated help document. Example string I put in POST: api.php?action=query&prop=categoryinfo&format=xml&titles=Category:Foo|Category:Bar Please look into this. Thai language makes the URL extremely long even with few long categories, thus quickly exceeds the URL length limit.
You need to POST only the query string part. Further you should make sure that your Content-Type is correctly set to application/x-www-form-urlencoded Example request: POST /w/api.php HTTP/1.0 Host: meta.wikimedia.org Content-Type: application/x-www-form-urlencoded action=query&prop=categoryinfo&format=xml&titles=Category:Foo|Category:Bar This way it works for me. Not a bug.
Oh yes. My dad. sorry. It works fine now.