提交地址：

http://vop.baidu.com//server_api

提交协议头：

Content-Type:audio/wav;

rate=8000;

Content-length=1000

提交的数据：

"format":"speex","rate":8000,"channel":1,"cuid":"weiliangxi","token":"24.d60020b04d40e51d09dbe360b63eed92.2592000.1461210932.282335-7341185","lan":"zh","len":10,"speech":"音频base64",

到底是哪里错了，无论我怎么改，返回的结果还是：

{"err_msg":"parameters error.","err_no":3300,"sn":"994813151441458653263"}