Sending ssl in UnityWebRequest

I want to use UnityWebRequest to send a Form Data parameter "ssl" including an ssl string (see picture below).



I already tried the two methods below. But it did not work.
Sending a simple payload did reach the server however.
Does formData change the header of UnityWebRequest? Or am I overlooking something else?

Code (CSharp):

1. IEnumerator Method(string url, string ssl){
2.         List<IMultipartFormSection> formData = new List<IMultipartFormSection>();
3.         formData.Add(new MultipartFormDataSection("ssl=" + ssl);
4.  
5.         UnityWebRequest www;
6.         www = UnityWebRequest.Post(url, formData);
7.  
8.         yield return www.SendWebRequest();
9.  
10.         if (www.isNetworkError || www.isHttpError)
11.         {
12.             Debug.Log(www.error);
13.         }
14.         else
15.         {
16.             userData = www.downloadHandler.text;
17.         }
18. }

and

Code (CSharp):

1. IEnumerator Method(string url, string ssl){
2.         List<IMultipartFormSection> formData = new List<IMultipartFormSection>();
3.  
4.         formData.Add(new MultipartFormDataSection("ssl=" +
5. ssl.Replace("+","%2B").Replace("=","%3D").Replace("/","%2F")));
6.  
7.         UnityWebRequest www;
8.         www = UnityWebRequest.Post(url, formData);
9.  
10.         yield return www.SendWebRequest();
11.  
12.         if (www.isNetworkError || www.isHttpError)
13.         {
14.             Debug.Log(www.error);
15.         }
16.         else
17.         {
18.             userData = www.downloadHandler.text;
19.         }
20. }

 

Thank you. That's a good tip.
Now I am using WWWForm like this:

Code (CSharp):

1. IEnumerator Method(string url, string ssl){
2.         WWWForm form = new WWWForm();
3.         form.AddField("ssl", ssl);
4.  
5.         UnityWebRequest www;
6.         www = UnityWebRequest.Post(url, form);
7.         yield return www.SendWebRequest();
8.         if (www.isNetworkError || www.isHttpError)
9.         {
10.             Debug.Log(www.error);
11.         }
12.         else
13.         {
14.             userData = www.downloadHandler.text;
15.         }
16. }

But I am still not able to login (changed to random data in the picture) and recieve a bad Request.
Could it be connected to "__proto__"? I have no clue what that is.

 

I really apriciate your that you are trying to help me.
An actual successful request I am trying to replicate is this:



Does this help? Otherwise, thank you for your effort.

The hex numbers inside the url are generated as well as the ssl. I already successfuly replicated that.
So the last step I have to take is to send the generated ssl to the generated url.

 

Using Fiddler is a good tip. I never used it befor. But I still don't know what I am exactly looking for. The two raw requests seem pretty different to me:

Unity:

POST https://item.engineering/dqart/91bf16b6f0e8573e4eddf1a265b781e9403:5e62d6a669ba526d772f3c63ff7764da/u/l/?version=alpha4 HTTP/1.1

Host: item.engineering

User-Agent: UnityPlayer/2019.2.3f1 (UnityWebRequest/1.0, libcurl/7.52.0-DEV)

Accept: */*

Accept-Encoding: identity

Content-Type: application/x-www-form-urlencoded

X-Unity-Version: 2019.2.3f1

Content-Length: 382



ssl=OH%2bbbJrfJ6U1b0mYn9Z5MZTH4SIpIS%2btt9xpcZWzN7o8fcHK5GFCbFVogPaBzKwPkDdwgkSYE90BzjTVhR0O%2byy7uAZt3dlsKJ%2bTRKO8KP%2f2ICwEFUMe1kgmkErSP4BvLm8filqt%2bmSLwX51wz0r3rFj1lmJKNOp3168CcFx6yj7zrjmNDwubqyN28S2v%2bmVmGCIyu671%2b84QcYfkjJMQR1J%2b7ySiDFrAJLce3Z3UhQpYqESdPqDayB64R6%2fou58b20CPXEUyE4WI8mWKc%2bynj8g0VJV8a%2bVxkwIYQW6rrDdj59Q0z14Vn43TqtnhyWcIwd%2ffpkJjJPekC%2fiH%2fgZPQ%3d%3d

Web browser:

POST https://item.engineering/dqart/76385dd43bb2c8c74e3a37fd1b1f529d:0328c5e798876a06df5d6b869550241c/u/l/?version=alpha4 HTTP/1.1

Host: item.engineering

Connection: keep-alive

Content-Length: 364

Accept: */*

Origin: https://item.engineering

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.90 Safari/537.36

Sec-Fetch-Mode: cors

Content-Type: application/x-www-form-urlencoded; charset=UTF-8

Sec-Fetch-Site: same-origin

Referer: https://item.engineering/DEde/tools/engineeringtool/

Accept-Encoding: gzip, deflate, br

Accept-Language: de-DE,de;q=0.9,en-US;q=0.8,en;q=0.7

Cookie: _gcl_au=1.1.794253783.1567584723; _ga=GA1.2.1886642906.1567584716; _gac_UA-66605572-1=1.1567584731.Cj0KCQjwwb3rBRDrARIsALR3XeY9xQbwOWUUkVVRgcXa4EMIhL4US6HqI-NNqdmtPoeBylTBNbxO2Z8aAgF_EALw_wcB; _gac_UA-66605572-2=1.1567584716.Cj0KCQjwwb3rBRDrARIsALR3XeY9xQbwOWUUkVVRgcXa4EMIhL4US6HqI-NNqdmtPoeBylTBNbxO2Z8aAgF_EALw_wcB; _gid=GA1.2.1187402807.1571035634; _gat_UA-66605572-2=1; _gat_UA-66605572-39=1; _gat_UA-66605572-1=1



ssl=DGbjiQ2RgWGhYRUWkfMNloXmg9doSXD6dyT4HAdwUTnNMSzGmsduWlkq%2Fldjts%2BR9hFxSf9nKF1PxhLcCVA289%2BX2VOd3CBRLu%2FCud2TYDVNFxRT9TcFa4ngfofpDehXMk4zoQucDjlkPhNEb1W3yDxkROn1AZV1OyqoNi1vIrWzPYORtRgTkGzojxbt1OyeKA06LVYfNjW2yok0fZvE339EudfHmzN01jkhCzugHnBKl2sfZwtRgK0LQD3WiHz2egvt60l6sHFgGXcts6Jc0ue2loWPcEJ2g0jn9W5x3T4sV4xG0LLot62a6VWLqx%2FaDMLP%2B9lCCUKaW9IcYZECDQ%3D%3D

 

Okay, I made it.
The problem was the Content-Type. All I had to add was

www.SetRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");

Thank you very much, Aurimas-Cernius!