ExperionCrawler/dxf-graph/test_mcp_client.cs

using System;
using System.Text;
using System.Text.Json;
using System.Net.Http;
using System.Threading.Tasks;

namespace TestMcpClient
{
    public class McpResponse
    {
        public string? jsonrpc { get; set; }
        public string? id { get; set; }
        public McpErrorBody? error { get; set; }
        public McpResult? result { get; set; }
    }

    public class McpErrorBody
    {
        public int? code { get; set; }
        public string? message { get; set; }
    }

    public class McpResult
    {
        public McpContentItem[]? content { get; set; }
    }

    public class McpContentItem
    {
        public string type { get; set; } = string.Empty;
        public string? text { get; set; }
        public string? data { get; set; }
    }

    class Program
    {
        static async Task Main(string[] args)
        {
            var client = new HttpClient();
            var request = new
            {
                jsonrpc = "2.0",
                id = "test-1",
                method = "tools/call",
                @params = new { name = "extract_pid_tags", arguments = new { text = "P-10107-500A-F1A-H100 Pump", source_type = "dxf" } }
            };

            var json = JsonSerializer.Serialize(request);
            var content = new StringContent(json, Encoding.UTF8, "application/json");

            using var httpRequest = new HttpRequestMessage(HttpMethod.Post, "http://localhost:5001/mcp")
            {
                Content = content
            };
            httpRequest.Headers.Add("Accept", "application/json");
            httpRequest.Headers.Add("mcp-protocol-version", "2025-03-26");

            var response = await client.SendAsync(httpRequest);
            Console.WriteLine($"Status: {response.StatusCode}");

            if (response.IsSuccessStatusCode)
            {
                var body = await response.Content.ReadAsStringAsync();
                Console.WriteLine($"\nResponse body (first 500 chars):\n{body.Substring(0, Math.Min(500, body.Length))}");

                var result = JsonSerializer.Deserialize<McpResponse>(body, new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
                Console.WriteLine($"\nDeserialized successfully!");
                Console.WriteLine($"result: {result?.result != null}");
                Console.WriteLine($"result.content: {result?.result?.content?.Length ?? 0}");

                if (result?.result?.content != null)
                {
                    var sb = new StringBuilder();
                    foreach (var item in result.result.content)
                    {
                        Console.WriteLine($"  content item: type={item.type}, text length={item.text?.Length ?? 0}");
                        if (item.type == "text")
                            sb.AppendLine(item.text);
                    }
                    Console.WriteLine($"\nExtracted text:\n{sb.ToString()}");
                }
            }
        }
    }
}