Question Google Gemini AI

[george_gr]

Hello everybody, i have the c# code below to connect with Gemini AI and make requests with API (window application), the problem is the application is running perfect but only for me (windows 11), the other users get error 400 bad request. please could you help me to solve the problem? here is my code:

 string apiKey = "XXXXXXXXXXXXXXXXXXXXX";
        string prompt = "Search for: " + richTextBox1.Text;

       
        string jsonData = "{\"contents\":[{\"parts\":[{\"text\":\"" + prompt.Replace("\"", "\\\"") + "\"}]}]}";
        string url = "URL TO gemini-1.5-pro:generateContent?key=" + apiKey;

        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls; 

        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
        request.Method = "POST";
        request.ContentType = "application/json";

        using (StreamWriter streamWriter = new StreamWriter(request.GetRequestStream()))
        {
            streamWriter.Write(jsonData);
            streamWriter.Flush();
        }

      
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            using (StreamReader reader = new StreamReader(response.GetResponseStream()))
            {
                string result = reader.ReadToEnd();
                richTextBox2.Text = result;
            }

 

[Skydiver]

May or may not be related to your problem. TLS 1.0 has been deprecated, but your line 8 is forcing the use of TLS 1.0.

TLS 1.0 and TLS 1.1 soon to be disabled in Windows | Microsoft Community Hub

While there will be an option to re-enable these protocols, we encourage the move to newer TLS versions.

techcommunity.microsoft.com

 

[Skydiver]

Also, have you asked your users what they are entering into the richtext box? It looks like you are escaping only double quotes from the input, but not escaping backslashes and a few other special characters. You can check JSON to see what characters should be escaped.

 

[george_gr]

May or may not be related to your problem. TLS 1.0 has been deprecated, but your line 8 is forcing the use of TLS 1.0.

TLS 1.0 and TLS 1.1 soon to be disabled in Windows | Microsoft Community Hub

While there will be an option to re-enable these protocols, we encourage the move to newer TLS versions.

techcommunity.microsoft.com

Thank you, i changed to: ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls13;

The program is still working fine for me, but other users still get 400 bad request. Does the API have some restrictions? i use the API for developers. This project was worked on the past in another one PC but now is working only on mine.

 

[Skydiver]

Is there more to the error message that Gemini sends back to those other users?

For example, if you look at this StackOverflow question, the error 400 is more specific about what was wrong with the request:

Getting 400 bad request error when trying to use gemini-1.5-pro-preview-0409 api with video in firebase functions

I'm trying to use gemini-1.5-pro-preview-0409 with video using the Vertex AI API. I'm using a nodejs function implemented in Firebase Cloud Functions and I'm calling this function via my webapp and

stackoverflow.com