使用schoology api时会再现以下错误

签名的验证失败(签名基本字符串是 “POST&HTTPS%3A%2F%2Fapi.schoology.com%2Fv1%2Fschools&oauth_consumer_key%3D64134cff9d88a091a68a45e7d4f370a10564c1513%26oauth_nonce%3D187B3PAJIWL6VXNJ%26oauth_signature_method%3DHMAC-SHA1%26oauth_timestamp%3D1448264309%26oauth_version%3D1.0”) .

api参数和学者的网址是https://api.schoology.com/v1/schools

输入: POST

-------------------------------头------------------ -------------------

授权:OAuth realm =“https://api.schoology.com/”,oauth_consumer_key =“c625d04d2c0d70b31976204be3fc49da05652c0ae”,oauth_nonce =“KCDQYG6B72ZEN8E5”,oauth_signature_method =“HMAC-SHA1”,oauth_timestamp =“1448264044”,oauth_version =“1.0” ,oauth_signature = “XNU%2F5xpd%2Bgvo6L9toIeT%2BqKqZTk%3D”

---------------------- json请求------------------------

{
   "title": "Example school name",
   "address1": "750 West Road",
   "city": "New York",
   "state": "New York"
}

------------------ Rest api详细资料文档------------------------

http://developers.schoology.com/api-documentation/rest-api-v1