set http post header not work

[ls19491314]

hello!
Thanks to you first! when i use your code that i found i set the header.but it cannot work.i not know why? i hope you can help me. it take me long long time! {"status":400,"headers":{"x-application-context":"sms-codes-web-api:product:8086","Content-Length":"49","Content-Type":"application/json;charset=ISO-8859-1","Server":"nginx","Date":"Tue, 15 Aug 2017 12:10:56 GMT"},"error":"{\"error\":{\"code\":50001,\"message\":\"missing auth\"}}"}