php hash_hmac到c＃ - webresponse“NONCE_NOT_PROVIDED”

Question

I try to convert a php-code to c#

php

$apikey='xxx';
$apisecretkey='yyy';
$nonce=time();
$uri='https://website.com/api/getsomething?apikey='.$apikey.'&nonce='.$nonce;
$sign=hash_hmac('sha512',$uri,$apisecretkey);
$resource = curl_init($uri);
curl_setopt($resource, CURLOPT_HTTPHEADER, array('apisign:'.$sign));
$execResult = curl_exec($resource);
$obj = ($execResult);

and here my C#

WebRequest _WebRequest;
WebResponse _WebResponse;
string apikey = "xxx";
string apisecret = "yyy";
string nonce = ((int)(DateTime.UtcNow - new DateTime(1970,1,1)).TotalSeconds).ToString();
string uri = $"https://website.com/api/getsomething?apikey={apikey}nonce={nonce}";
string _Hash_hmac = Hash_hmac(uri, apisecret);

_WebRequest = WebRequest.Create(uri);
_WebRequest.Headers["apisign"] = _Hash_hmac;

_WebResponse = _WebRequest.GetResponse();

The Code for Hash-hmac I use this C# equivalent to hash_hmac in PHP

The Webresponse is always "NONCE_NOT_PROVIDED"

I checked the outcome from the hash_hmac with the one in php - they are the same. And also try string ToUpper and ToLower.

What I am doing wrong?

Answer 1

Aren't you missing an ampersand (&)?

apikey={apikey}nonce={nonce}

becomes

apikey={apikey}&nonce={nonce}

I would advise reading your code more closely with these kinds of errors.