WhatsApp Go MCP

package cmd import ( "encoding/base64" "encoding/json" "net/http" "net/url" "strings" "github.com/sirupsen/logrus" ) // sessionConfig handles optional configuration from Smithery type sessionConfig struct { // Add any configuration fields if needed // For now, we don't require any specific config } // parseSessionConfig extracts and decodes the base64-encoded config from URL func parseSessionConfig(r *http.Request) (*sessionConfig, error) { // Parse URL to get query parameters u, err := url.Parse(r.URL.String()) if err != nil { return nil, err } // Get config parameter configParam := u.Query().Get("config") if configParam == "" { // No config provided, return empty config logrus.Debug("No config parameter provided") return &sessionConfig{}, nil } // Decode base64 configData, err := base64.StdEncoding.DecodeString(configParam) if err != nil { // Try URL-safe base64 encoding configData, err = base64.URLEncoding.DecodeString(configParam) if err != nil { logrus.Warnf("Failed to decode config parameter: %v", err) return &sessionConfig{}, nil // Return empty config on error } } // Parse JSON var config sessionConfig if err := json.Unmarshal(configData, &config); err != nil { logrus.Warnf("Failed to parse config JSON: %v", err) return &sessionConfig{}, nil // Return empty config on error } logrus.Debugf("Parsed session config: %+v", config) return &config, nil } // sessionMiddleware handles session configuration from Smithery func sessionMiddleware(next http.Handler) http.Handler { return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { // Parse session config if present config, err := parseSessionConfig(r) if err != nil { logrus.Errorf("Error parsing session config: %v", err) } else if config != nil { // Store config in request context if needed // For now, we just log it logrus.Debugf("Session config received: %+v", config) } // Strip config parameter from URL before passing to MCP handler if strings.Contains(r.URL.RawQuery, "config=") { u, _ := url.Parse(r.URL.String()) q := u.Query() q.Del("config") u.RawQuery = q.Encode() r.URL = u } // Pass to next handler next.ServeHTTP(w, r) }) }