403使用Webrequest的禁止错误但在邮递员中有效 [英] 403 Forbidden error using Webrequest but works in postman

问题描述

我有一个授权代码，我需要在调用api时使用一些标头值传入正文。当从邮递员那里尝试同样的工作时它的工作正常，但C＃Webclient抛出403错误。

I have a Authorization code which i need to pass in body with some header value when calling a api. when trying the same from postman its working fine but C# Webclient throwing 403 error.

以下代码： -

    public string GetResponse（string AuthCode）

        {

   public string GetResponse(string 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）;



            //创建请求

            var httpWebRequest =（HttpWebRequest）WebRequest.Create（uri）;

            httpWebRequest.Proxy.Credentials = System.Net.CredentialCache.DefaultCredentials;

            httpWebRequest.Headers.Add（HttpRequestHeader.Authorization，" Basic" + AuthCode）;

            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，与Gecko一样）Chrome / 51.0.2704.106 Safari / 537.36" ;;



            Stream stream = httpWebRequest.GetRequestStream（）;

            stream.Write（data，0，data.Length）;

            stream.Close（）;



            //获取回复

            HttpWebResponse httpResponse = null;

           试试
            {

                httpResponse =（HttpWebResponse）httpWebRequest.GetResponse（）;

            }¥b $ b            catch（例外情况）

            {

                Console.WriteLine（"获取资源时的异常"+"ex.Message"）;

               返回null;

            }


            string result = null;

           使用（var streamReader = new StreamReader（httpResponse.GetResponseStream（））））
            {

                result = streamReader.ReadToEnd（）;

            }


           返回结果;

    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 " + AuthCode);
            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;

}

Postman Curl命令： -

Postman Curl command:-

从curl请求生成：

Generated from a curl request:

curl -X POST  

'https：//example.com//openam/oauth2/access_token?grant_type=authorization_code&realm=/cbpgatqa'<跨度>&NBSP;

-H '授权：基本MzE4OGQwYjQtZTRlOC00MTZjLTg5NjAtZDNlYWFhMmNjY2IxOkx3NiVBa0x4NWtPM01rJTJ5RWwxbW1jR0ZYZmhTQmk1NHhIRCpzNiUyVUd5WXN0MCNVbyNMNWQhcVlpZE93djc ='<跨度>&NBSP;

-H"缓存控制：无-cache' 

-H'内容类型：application / x-www-form-urlencoded' 

-d'code = 93317468-7464-4804-b38a-43e13265c4ac& redirect_uri = http％3A％2F％2F localhost％3A8080％2F'

curl -X POST 
'https://example.com//openam/oauth2/access_token?grant_type=authorization_code&realm=/cbpgatqa' 
-H 'Authorization: Basic MzE4OGQwYjQtZTRlOC00MTZjLTg5NjAtZDNlYWFhMmNjY2IxOkx3NiVBa0x4NWtPM01rJTJ5RWwxbW1jR0ZYZmhTQmk1NHhIRCpzNiUyVUd5WXN0MCNVbyNMNWQhcVlpZE93djc=' 
-H 'Cache-Control: no-cache' 
-H 'Content-Type: 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。任何人都可以帮助我

I am not able to figure it out the issue . Can anyone please help me

推荐答案

您好Kumar93，

Hi Kumar93,

感谢您发布此处。

根据我的搜索，您可以通过以下两种方式来解决403 Forbidden。

Based on my search, here are two ways for your reference to solve 403 Forbidden.

https://stackoverflow.com/questions/3272067/webclient-403-禁止

https://stackoverflow.com/questions/2794260/webclient-the-remote-server-returned-an-error-403-forbidden

最诚挚的问候，

Wendy

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