feat: add MCP endpoint exposing calendar tools over Streamable HTTP

Adds a POST /mcp endpoint (github.com/modelcontextprotocol/go-sdk) with three tools mirroring the existing /calendar logic: get_calendar_today, get_calendar_for_date and get_holidays. Bumps go.mod to Go 1.25 (required by the SDK) and vendors the new dependencies. Also fixes an unanchored .gitignore rule ("domogeek") that was silently excluding all untracked files under cmd/domogeek/. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Hu8wwahgecuCGfesTKCfEd
2026-09-05 10:53:31 +02:00
parent e30c25b198
commit e5468ef654
553 changed files with 88442 additions and 12995 deletions
@@ -0,0 +1,69 @@
+// Copyright 2026 The Go MCP SDK Authors. All rights reserved.
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+// This file contains shared utilities for OAuth handlers.
+
+package auth
+
+import (
+	"context"
+	"net/http"
+	"net/url"
+	"strings"
+
+	"github.com/modelcontextprotocol/go-sdk/oauthex"
+)
+
+// GetAuthServerMetadata fetches authorization server metadata for the given issuer URL.
+// It tries standard well-known endpoints (OAuth 2.0 and OIDC) and returns the first successful result.
+//
+// Returns (nil, nil) when no metadata endpoints respond (404s), allowing callers to implement
+// fallback logic. Returns an error for any non-client error (network failures, invalid JSON, etc.).
+func GetAuthServerMetadata(ctx context.Context, issuerURL string, httpClient *http.Client) (*oauthex.AuthServerMeta, error) {
+	for _, metadataURL := range authorizationServerMetadataURLs(issuerURL) {
+		asm, err := oauthex.GetAuthServerMeta(ctx, metadataURL, issuerURL, httpClient)
+		if err != nil {
+			return nil, err
+		}
+		if asm != nil {
+			return asm, nil
+		}
+	}
+	return nil, nil
+}
+
+// authorizationServerMetadataURLs returns a list of URLs to try when looking for
+// authorization server metadata as mandated by the MCP specification:
+// https://modelcontextprotocol.io/specification/2025-11-25/basic/authorization#authorization-server-metadata-discovery.
+func authorizationServerMetadataURLs(issuerURL string) []string {
+	var urls []string
+
+	baseURL, err := url.Parse(issuerURL)
+	if err != nil {
+		return nil
+	}
+
+	if baseURL.Path == "" {
+		// "OAuth 2.0 Authorization Server Metadata".
+		baseURL.Path = "/.well-known/oauth-authorization-server"
+		urls = append(urls, baseURL.String())
+		// "OpenID Connect Discovery 1.0".
+		baseURL.Path = "/.well-known/openid-configuration"
+		urls = append(urls, baseURL.String())
+		return urls
+	}
+
+	originalPath := baseURL.Path
+	// "OAuth 2.0 Authorization Server Metadata with path insertion".
+	baseURL.Path = "/.well-known/oauth-authorization-server/" + strings.TrimLeft(originalPath, "/")
+	urls = append(urls, baseURL.String())
+	// "OpenID Connect Discovery 1.0 with path insertion".
+	baseURL.Path = "/.well-known/openid-configuration/" + strings.TrimLeft(originalPath, "/")
+	urls = append(urls, baseURL.String())
+	// "OpenID Connect Discovery 1.0 with path appending".
+	baseURL.Path = "/" + strings.Trim(originalPath, "/") + "/.well-known/openid-configuration"
+	urls = append(urls, baseURL.String())
+
+	return urls
+}