如何在 C# 中使用 HttpWebRequest 传递 header 和 Body 值？

Question

我正在尝试通过 C# 中的 HttpWebRequest class POST API 凭据数据 API，就像我必须传递 "Content-Type:application/x-www-form-urlencoded" in Header，然后必须在 Body 中传递 "grant_type:client_credentials,client_id:ruban123,client_secret:123456" 以获得 response/token（如 API参考).

下面附上我做的作品

    public class DataModel
    {
        public string grant_type { get; set; }
        public string client_id { get; set; }
        public string client_secret { get; set; }
    }
    static void Main(string[] args)
    {

        try
        {
            DataModel dm = new DataModel();
            dm.grant_type = "client_credentials";
            dm.client_id = "ruban123";
            dm.client_secret = "123456";

            var credentials = dm.grant_type + dm.client_id + dm.client_secret;

            #region Http Post
            string messageUri = "https://sampleurl.apivision.com:8493/abc/oauth/token";
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(messageUri);
            request.Headers.Add("Authorization", "Basic " + credentials);
            request.ContentType = "application/json";
            request.Method = "POST";
            using (var streamWriter = new StreamWriter(request.GetRequestStream()))
            {
                string jsonModel = Newtonsoft.Json.JsonConvert.SerializeObject(dm);
                streamWriter.Write(jsonModel);
                streamWriter.Flush();
                streamWriter.Close();
            }
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            Stream responseStream = response.GetResponseStream();

            string jsonString = null;

            using (StreamReader reader = new StreamReader(responseStream))
            {
                jsonString = reader.ReadToEnd();
                Console.WriteLine();
                reader.Close();
            }

            #endregion Http Post
        }

        catch (Exception ex)
        {
        }
    }[API REFERENCE][1]

Answer 1

这里是正确的 HttpWebRequest 使用：

    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(pathapi);
    request.Method = "POST";
    string postData = "grant_type=client_credentials&client_id=ruban123&client_secret=123456";
    ASCIIEncoding encoding = new ASCIIEncoding();
    byte[] bytes = encoding.GetBytes(postData);

    request.ContentType = "application/x-www-form-urlencoded";

    request.ContentLength = bytes.Length;
    Stream newStream = request.GetRequestStream();
    newStream.Write(bytes, 0, bytes.Length);

    HttpWebResponse response = request.GetResponse() as HttpWebResponse;

HttpWebRequest 方法不相关。看看这个问题

Answer 2

您似乎错过了 HttpWebRequest 的 ContentLength 属性设置。它应该与要发送的字节数相等。

查看此 link 了解更多信息：

https://docs.microsoft.com/en-us/dotnet/api/system.net.httpwebrequest.contentlength?view=netframework-4.8

如何在 C# 中使用 HttpWebRequest 传递 header 和 Body 值？

How to pass header and Body value using HttpWebRequest in C#?

c#

api

integration

httpwebresponse

下面附上我做的作品