403在C＃中使用Webrequest的禁止错误，但在邮递员中有效

Question

我有一个授权代码，我在调用api时需要在主体中传递一些标头值。 当尝试从邮递员相同时，它的工作正常，但C＃Webclient抛出403错误。

代码如下：-

公共字符串GetResponse（字符串AuthCode）{

string url = "https://example.com//openam/oauth2/access_token?grant_type=authorization_code&realm=/cbpgatqa";
        Uri uri = new Uri(string.Format(url));

        ASCIIEncoding encoding = new ASCIIEncoding();
        string postData = "code=" + AuthCode + "&redirect_uri=" + "http://localhost:8080";
        byte[] data = Encoding.GetEncoding("UTF-8").GetBytes(postData);

        // Create the request
        var httpWebRequest = (HttpWebRequest)WebRequest.Create(uri);
        httpWebRequest.Proxy.Credentials = System.Net.CredentialCache.DefaultCredentials;
        httpWebRequest.Headers.Add(HttpRequestHeader.Authorization, "Basic " +  "MzE4OGQwYjQtZTRlOC00MTZjLTg5NjAtZDNlYWFhMmNjY2IxOkx3NiVBa0x4NWtPM01rJTJ5RWwxbW1jR0ZYZmhTQmk1NHhIRCpzNiUyVUd5WXN0MCNVbyNMNWQhcVlpZE93djc=");
        httpWebRequest.ContentType = "application/json";
        httpWebRequest.Method = "POST";
        httpWebRequest.ContentLength = data.Length;
        httpWebRequest.UserAgent = @"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.106 Safari/537.36";

        Stream stream = httpWebRequest.GetRequestStream();
        stream.Write(data, 0, data.Length);
        stream.Close();

        // Get the response
        HttpWebResponse httpResponse = null;
        try
        {
            httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
        }
        catch (Exception ex)
        {
            Console.WriteLine("Exception while getting resource " + ex.Message);
            return null;
        }

        string result = null;
        using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
        {
            result = streamReader.ReadToEnd();
        }

        return result;

}

邮递员卷曲命令：-

从curl请求生成：

卷曲-X POST ' https://example.com//openam/oauth2/access_token?grant_type=authorization_code&realm=/cbpgatqa ' -H '授权：基本MzE4OGQwYjQtZTRlOC00MTZjLTg5NjAtZDNlYWFhMmNjY2IxOkx3NiVBa0x4NWtPM01rJTJ5RWwxbW1jR0ZYZmhTQmk1NHhIRCpzNiUyVUd5WXN0MCNVbyNMNWQhcVlpZE93djc =' -H '缓存控制：无缓存' -H'内容类型：application / x-www-form-urlencoded'-d'code = 93317468-7464-4804-b38a-43e13265c4ac＆redirect_uri = http％3A％2F％2Flocalhost％3A8080％2F'

我无法弄清楚问题所在。 谁能帮帮我吗

Answer 1

使用RestSharp并传递正确的标头值解决了问题

var client = new RestClient("https://example.com/openam/oauth2/access_token?grant_type=authorization_code&realm=/cbpgatqa");
            var request = new RestRequest(Method.POST);

            request.AddHeader("Content-Type", "application/x-www-form-urlencoded");
            request.AddHeader("Cache-Control", "no-cache");
            request.AddHeader("Authorization", "Basic MzE4OGQwYjQtZTRlOC00MTZjLTg5NjAtZDNlYWFhMmNjY2IxOkx3NiVBa0x4NWtPM01rJTJ5RWwxbW1jR0ZYZmhTQmk1NHhIRCpzNiUyVUd5WXN0MCNVbyNMNWQhcVlpZE93djc=");
            request.AddParameter("undefined", "code=" + AuthCode + "&redirect_uri=http%3A%2F%2Flocalhost%3A8080", ParameterType.RequestBody);
            IRestResponse response = client.Execute(request);

            using (var ms = new MemoryStream(Encoding.Unicode.GetBytes(response.Content)))
            {
                // Deserialization from JSON  
                DataContractJsonSerializer deserializer = new DataContractJsonSerializer(typeof(Token));
                Token token = (Token)deserializer.ReadObject(ms);
            return  userinfo=  GetuserInfo(token.id_token);
            }