d21d933876* Move notification handler registrations to capabilities Currently request handlers are set on the capability objects, but notification handlers are set after construction via an AddNotificationHandler method on the IMcpEndpoint interface. This moves handler specification to be at construction as well. This makes it more consistent with request handlers, simplifies the IMcpEndpoint interface to just be about message sending, and avoids a concurrency bug that could occur if someone tried to add a handler while the endpoint was processing notifications. * Address more feedback and further cleanup
55 lines
No EOL
2.3 KiB
C#
55 lines
No EOL
2.3 KiB
C#
using ModelContextProtocol;
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using ModelContextProtocol.Server;
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using System.ComponentModel;
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using System.Text.Json;
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namespace QuickstartWeatherServer.Tools;
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[McpServerToolType]
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public sealed class WeatherTools
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{
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[McpServerTool, Description("Get weather alerts for a US state.")]
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public static async Task<string> GetAlerts(
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HttpClient client,
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[Description("The US state to get alerts for.")] string state)
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{
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using var jsonDocument = await client.ReadJsonDocumentAsync($"/alerts/active/area/{state}");
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var jsonElement = jsonDocument.RootElement;
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var alerts = jsonElement.GetProperty("features").EnumerateArray();
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if (!alerts.Any())
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{
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return "No active alerts for this state.";
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}
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return string.Join("\n--\n", alerts.Select(alert =>
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{
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JsonElement properties = alert.GetProperty("properties");
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return $"""
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Event: {properties.GetProperty("event").GetString()}
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Area: {properties.GetProperty("areaDesc").GetString()}
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Severity: {properties.GetProperty("severity").GetString()}
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Description: {properties.GetProperty("description").GetString()}
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Instruction: {properties.GetProperty("instruction").GetString()}
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""";
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}));
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}
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[McpServerTool, Description("Get weather forecast for a location.")]
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public static async Task<string> GetForecast(
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HttpClient client,
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[Description("Latitude of the location.")] double latitude,
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[Description("Longitude of the location.")] double longitude)
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{
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using var jsonDocument = await client.ReadJsonDocumentAsync($"/points/{latitude},{longitude}");
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var jsonElement = jsonDocument.RootElement;
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var periods = jsonElement.GetProperty("properties").GetProperty("periods").EnumerateArray();
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return string.Join("\n---\n", periods.Select(period => $"""
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{period.GetProperty("name").GetString()}
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Temperature: {period.GetProperty("temperature").GetInt32()}°F
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Wind: {period.GetProperty("windSpeed").GetString()} {period.GetProperty("windDirection").GetString()}
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Forecast: {period.GetProperty("detailedForecast").GetString()}
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"""));
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}
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} |