I'm trying to log in to the website via C#

string url = "https://drs.zalohovysystem.sk/"
string param = "username=myusername&password=mypass";
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "POST";
            request.ContentLength = param.Length;
            request.ContentType = "application/x-www-form-urlencoded";
            request.CookieContainer = new CookieContainer();

            using (Stream stream = request.GetRequestStream())
            {
                byte[] paramAsBytes = Encoding.Default.GetBytes(param);
                stream.Write(paramAsBytes, 0, paramAsBytes.Count());
            }

            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse()) //here i get error 405
            {
                foreach (var cookie in response.Cookies)
                {
                    var properties = cookie.GetType()
                                           .GetProperties()
                                           .Select(p => new
                                           {
                                               Name = p.Name,
                                               Value = p.GetValue(cookie)
                                           });

                    foreach (var property in properties)
                    {
                        Console.WriteLine("{0}: {1}", property.Name, property.Value);
                    }
                }
            }

I get this:

Exception thrown: 'System.Net.WebException' in System.dll An unhandled exception of type 'System.Net.WebException' occurred in System.dll The remote server returned an error: (405) Method Not Allowed.

CodePudding user response：

The error message is telling the POST method is not allowed on the endpoint. In such cases, the most common problems are:

• You may be using a wrong endpoint (which is the case here).
• You may be using the wrong HTTP method.

How to figure out the problem

1. Open a browser like Chrome or Edge and browse to the login page
2. Press F12 to open developer tools
3. Select network tab, and make sure it's capturing the traffic (the record button should be red)
4. enter credentials and press login button.
5. See the request details, including request headers and payload tabs.

How to send the request and get response

You should send a:

• POST request to https://drs-function-prod.azurewebsites.net/api/v1/Auth/Login endpoint
• Set the Content-Type: application/json
• Send a payload like {"login":"[email protected]","password":"xyz"}

Then you will receive the following response:

For example:

static HttpClient client = new HttpClient();
private async void button1_Click(object sender, EventArgs e)
{
    var jsonStr = JsonConvert.SerializeObject(new { login="[email protected]", password ="xyz" });
    var content = new StringContent(jsonStr, Encoding.UTF8, "application/json");
    var response = await client.PostAsync(
        "https://drs-function-prod.azurewebsites.net/api/v1/Auth/Login", content);
    MessageBox.Show($"Status: {response.StatusCode}\n"  
        $"{await response.Content.ReadAsStringAsync()}");
}

CodePudding user response：

Make sure Client Secret Key is correct, also try to set:

request.Accept= "/"; request.UserAgent = "MyApp";