PHP转C# RestSharp API调用遇Authorization头错误，求排查优化

我正尝试将一段PHP的API POST调用转换为C# RestSharp实现，已完全复刻PHP中的逻辑，但仍收到错误响应："Authorization header is incorrect"。我不熟悉PHP，能否帮我检查RestSharp代码是否与PHP代码完全一致，以及可优化的点？

PHP示例代码 #

<?
$clientId = "your_client_id";
$secret = "your_secret";

$url = "https://www.badboy.com/api/1.1/request/create";
$curl = curl_init($url);

curl_setopt($curl, CURLOPT_URL, $url);

$headers = array(
   "Accept: application/json",
   "Content-Type: application/json",
   "Authorization: Basic " . base64_encode($clientId . ":" . $secret)
);

curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);

$data =
    [
        "reference"=>"some-reference-value",
        "environment"=>"sandbox",
        "name"=>"John Smith",
        "email"=>"myemail@email.com",
        "scope"=>"documents(passport)",
        "address" => [
            "address1"=>"Unit 8-10",
            "town"=>"London",
            "postcode"=>"SW6 2UZ",
            "country"=>"GBR"
        ]
    ];

curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($data));
?>

C# RestSharp代码（原实现） #

string endpoint = @"https://www.badboy.com/";
string clientId = @"your_client_id";
string secretCode = @"your_secret";

var client = new RestClient(endpoint);
var request = new RestRequest("api/1.8/request/create", Method.Post);

request.RequestFormat = DataFormat.Json;

string combine = clientId + ":" + secretCode;
var bt = Encoding.UTF8.GetBytes(combine);
string encodedSecretCode = Convert.ToBase64String(bt);

//request.AddHeader("Accept", "application/json");
//request.AddHeader("Content-Type", "application/json");
//request.AddHeader("Authorization", "Basic " + encodedSecretCode);

Dictionary<string, string> headers = new Dictionary<string, string>();
headers.Add("Accept", "application/json");
headers.Add("Content-Type", "application/json");
headers.Add("Authorization", "Basic " + encodedSecretCode);
request.AddHeaders(headers);

var data = new DataBody();
data.reference = "some-dd-value";
data.environment = "ss";
data.name = "John Smith";
data.email = "me@email.com";
data.scope = "documents(foo)";
data.address.address1 = "Unit 8-10";
data.address.town = "London";
data.address.postcode = "SW6 2UZ";
data.address.country = "GBR";

string jsonData = JsonSerializer.Serialize(data);
request.AddBody(jsonData);  

var response = client.Execute(request);

C#模型类 #

public class Address
{
    public string address1 { get; set; }
    public string address2 { get; set; }
    public string address3 { get; set; }
    public string town { get; set; }
    public string postcode { get; set; }
    public string country { get; set; }
}

public class DataBody
{
    public string reference { get; set; }
    public string client_key { get; set; }
    public string note { get; set; }
    public string scope { get; set; }
    public string callback_uri { get; set; }
    public string name { get; set; }
    public string redirect_uri { get; set; }
    public string mandatory { get; set; }
    public string user { get; set; }
    public string email { get; set; }
    public string send_choice { get; set; }
    public string tabs_order { get; set; }
    public string environment { get; set; }
    public bool use_defaults { get; set; }
    public Address address { get; set; } = new Address();
}

问题排查与优化点 #

1. API版本不一致 #

PHP调用的是api/1.1/request/create，而C#用的是api/1.8/request/create，版本差异可能导致接口鉴权逻辑变化，必须先对齐API版本号。

2. Basic Auth实现错误 #

PHP同时设置了手动拼接的Authorization头和CURLAUTH_BASIC，但RestSharp有原生的Basic Auth实现，手动拼接容易出现编码或格式问题。建议替换为RestSharp自带方法：

// 替换手动拼接Authorization头的代码
request.AddBasicAuthentication(clientId, secretCode);

此方法会自动处理编码和头的生成，避免手动拼接的错误。

3. 请求Body处理冗余 #

你手动序列化DataBody再调用AddBody，但RestSharp在设置RequestFormat = DataFormat.Json后，可以直接传入对象，它会自动用内置的序列化器处理，避免手动序列化导致的格式不兼容：

// 替换手动序列化的代码
request.AddBody(data);

4. 请求参数不匹配 #

对比PHP和C#的参数值：

• PHP中environment为sandbox，C#中是ss
• PHP中scope为documents(passport)，C#中是documents(foo)
• PHP中reference为some-reference-value，C#中是some-dd-value
  这些参数差异可能不仅影响鉴权，还会导致接口逻辑报错，必须将参数值对齐。

5. 模型类多余字段处理 #

DataBody包含很多PHP请求中没有的字段（如client_key、note等），默认序列化会将这些null值或默认值（如use_defaults的false）传入接口，可能不符合要求。可以用[JsonIgnore]标记不需要的字段：

public class DataBody
{
    public string reference { get; set; }
    [JsonIgnore]
    public string client_key { get; set; }
    [JsonIgnore]
    public string note { get; set; }
    public string scope { get; set; }
    [JsonIgnore]
    public string callback_uri { get; set; }
    public string name { get; set; }
    [JsonIgnore]
    public string redirect_uri { get; set; }
    [JsonIgnore]
    public string mandatory { get; set; }
    [JsonIgnore]
    public string user { get; set; }
    public string email { get; set; }
    [JsonIgnore]
    public string send_choice { get; set; }
    [JsonIgnore]
    public string tabs_order { get; set; }
    public string environment { get; set; }
    [JsonIgnore]
    public bool use_defaults { get; set; }
    public Address address { get; set; } = new Address();
}

优化后的完整C#代码 #

string endpoint = @"https://www.badboy.com/";
string clientId = @"your_client_id";
string secretCode = @"your_secret";

var client = new RestClient(endpoint);
// 对齐API版本号
var request = new RestRequest("api/1.1/request/create", Method.Post);

request.RequestFormat = DataFormat.Json;
// 使用RestSharp原生Basic Auth
request.AddBasicAuthentication(clientId, secretCode);

var data = new DataBody();
// 对齐参数值
data.reference = "some-reference-value";
data.environment = "sandbox";
data.name = "John Smith";
data.email = "myemail@email.com";
data.scope = "documents(passport)";
data.address.address1 = "Unit 8-10";
data.address.town = "London";
data.address.postcode = "SW6 2UZ";
data.address.country = "GBR";

// 直接传入对象，RestSharp自动序列化
request.AddBody(data);  

var response = client.Execute(request);

内容的提问来源于stack exchange，提问作者John Decor