MCP Toolbox for Databases

// Copyright 2025 Google LLC // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package cloudgda import ( "context" "fmt" "net/http" "github.com/goccy/go-yaml" "github.com/googleapis/genai-toolbox/internal/sources" "github.com/googleapis/genai-toolbox/internal/util" "go.opentelemetry.io/otel/trace" "golang.org/x/oauth2" "golang.org/x/oauth2/google" ) const SourceKind string = "cloud-gemini-data-analytics" const Endpoint string = "https://geminidataanalytics.googleapis.com" // validate interface var _ sources.SourceConfig = Config{} func init() { if !sources.Register(SourceKind, newConfig) { panic(fmt.Sprintf("source kind %q already registered", SourceKind)) } } func newConfig(ctx context.Context, name string, decoder *yaml.Decoder) (sources.SourceConfig, error) { actual := Config{Name: name} if err := decoder.DecodeContext(ctx, &actual); err != nil { return nil, err } return actual, nil } type Config struct { Name string `yaml:"name" validate:"required"` Kind string `yaml:"kind" validate:"required"` ProjectID string `yaml:"projectId" validate:"required"` UseClientOAuth bool `yaml:"useClientOAuth"` } func (r Config) SourceConfigKind() string { return SourceKind } // Initialize initializes a Gemini Data Analytics Source instance. func (r Config) Initialize(ctx context.Context, tracer trace.Tracer) (sources.Source, error) { ua, err := util.UserAgentFromContext(ctx) if err != nil { return nil, fmt.Errorf("error in User Agent retrieval: %s", err) } var client *http.Client if r.UseClientOAuth { client = &http.Client{ Transport: util.NewUserAgentRoundTripper(ua, http.DefaultTransport), } } else { // Use Application Default Credentials // Scope: "https://www.googleapis.com/auth/cloud-platform" is generally sufficient for GDA creds, err := google.FindDefaultCredentials(ctx, "https://www.googleapis.com/auth/cloud-platform") if err != nil { return nil, fmt.Errorf("failed to find default credentials: %w", err) } baseClient := oauth2.NewClient(ctx, creds.TokenSource) baseClient.Transport = util.NewUserAgentRoundTripper(ua, baseClient.Transport) client = baseClient } s := &Source{ Config: r, Client: client, BaseURL: Endpoint, userAgent: ua, } return s, nil } var _ sources.Source = &Source{} type Source struct { Config Client *http.Client BaseURL string userAgent string } func (s *Source) SourceKind() string { return SourceKind } func (s *Source) ToConfig() sources.SourceConfig { return s.Config } func (s *Source) GetProjectID() string { return s.ProjectID } func (s *Source) GetBaseURL() string { return s.BaseURL } func (s *Source) GetClient(ctx context.Context, accessToken string) (*http.Client, error) { if s.UseClientOAuth { if accessToken == "" { return nil, fmt.Errorf("client-side OAuth is enabled but no access token was provided") } token := &oauth2.Token{AccessToken: accessToken} baseClient := oauth2.NewClient(ctx, oauth2.StaticTokenSource(token)) baseClient.Transport = util.NewUserAgentRoundTripper(s.userAgent, baseClient.Transport) return baseClient, nil } return s.Client, nil } func (s *Source) UseClientAuthorization() bool { return s.UseClientOAuth }