[c#] Making a cURL call in C#

Late response but this is what I ended up doing. If you want to run your curl commands very similarly as you run them on linux and you have windows 10 or latter do this:

    public static string ExecuteCurl(string curlCommand, int timeoutInSeconds=60)
    {
        if (string.IsNullOrEmpty(curlCommand))
            return "";

        curlCommand = curlCommand.Trim();

        // remove the curl keworkd
        if (curlCommand.StartsWith("curl"))
        {
            curlCommand = curlCommand.Substring("curl".Length).Trim();
        }

        // this code only works on windows 10 or higher
        {

            curlCommand = curlCommand.Replace("--compressed", "");

            // windows 10 should contain this file
            var fullPath = System.IO.Path.Combine(Environment.SystemDirectory, "curl.exe");

            if (System.IO.File.Exists(fullPath) == false)
            {
                if (Debugger.IsAttached) { Debugger.Break(); }
                throw new Exception("Windows 10 or higher is required to run this application");
            }

            // on windows ' are not supported. For example: curl 'http://ublux.com' does not work and it needs to be replaced to curl "http://ublux.com"
            List<string> parameters = new List<string>();


            // separate parameters to escape quotes
            try
            {
                Queue<char> q = new Queue<char>();

                foreach (var c in curlCommand.ToCharArray())
                {
                    q.Enqueue(c);
                }

                StringBuilder currentParameter = new StringBuilder();

                void insertParameter()
                {
                    var temp = currentParameter.ToString().Trim();
                    if (string.IsNullOrEmpty(temp) == false)
                    {
                        parameters.Add(temp);
                    }

                    currentParameter.Clear();
                }

                while (true)
                {
                    if (q.Count == 0)
                    {
                        insertParameter();
                        break;
                    }

                    char x = q.Dequeue();

                    if (x == '\'')
                    {
                        insertParameter();

                        // add until we find last '
                        while (true)
                        {
                            x = q.Dequeue();

                            // if next 2 characetrs are \' 
                            if (x == '\\' && q.Count > 0 && q.Peek() == '\'')
                            {
                                currentParameter.Append('\'');
                                q.Dequeue();
                                continue;
                            }

                            if (x == '\'')
                            {
                                insertParameter();
                                break;
                            }

                            currentParameter.Append(x);
                        }
                    }
                    else if (x == '"')
                    {
                        insertParameter();

                        // add until we find last "
                        while (true)
                        {
                            x = q.Dequeue();

                            // if next 2 characetrs are \"
                            if (x == '\\' && q.Count > 0 && q.Peek() == '"')
                            {
                                currentParameter.Append('"');
                                q.Dequeue();
                                continue;
                            }

                            if (x == '"')
                            {
                                insertParameter();
                                break;
                            }

                            currentParameter.Append(x);
                        }
                    }
                    else
                    {
                        currentParameter.Append(x);
                    }
                }
            }
            catch
            {
                if (Debugger.IsAttached) { Debugger.Break(); }
                throw new Exception("Invalid curl command");
            }

            StringBuilder finalCommand = new StringBuilder();

            foreach (var p in parameters)
            {
                if (p.StartsWith("-"))
                {
                    finalCommand.Append(p);
                    finalCommand.Append(" ");
                    continue;
                }

                var temp = p;

                if (temp.Contains("\""))
                {
                    temp = temp.Replace("\"", "\\\"");
                }
                if (temp.Contains("'"))
                {
                    temp = temp.Replace("'", "\\'");
                }

                finalCommand.Append($"\"{temp}\"");
                finalCommand.Append(" ");
            }


            using (var proc = new Process
            {
                StartInfo = new ProcessStartInfo
                {
                    FileName = "curl.exe",
                    Arguments = finalCommand.ToString(),
                    UseShellExecute = false,
                    RedirectStandardOutput = true,
                    RedirectStandardError = true,
                    CreateNoWindow = true,
                    WorkingDirectory = Environment.SystemDirectory
                }
            })
            {
                proc.Start();

                proc.WaitForExit(timeoutInSeconds*1000);

                return proc.StandardOutput.ReadToEnd();
            }
        }
    }

The reason why the code is a little bit long is because windows will give you an error if you execute a single quote. In other words, the command curl 'https://google.com' will work on linux and it will not work on windows. Thanks to that method I created you can use single quotes and run your curl commands exactly as you run them on linux. This code also checks for escaping characters such as \' and \".

For example use this code as

var output = ExecuteCurl(@"curl 'https://google.com' -H 'Accept: application/json, text/javascript, */*; q=0.01'");

If you where to run that same string agains C:\Windows\System32\curl.exe it will not work because for some reason windows does not like single quotes.

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