package clientmiddleware import ( "context" "github.com/grafana/grafana-plugin-sdk-go/backend" "github.com/grafana/grafana/pkg/plugins/pluginrequestmeta" ) // NewPluginRequestMetaMiddleware returns a new backend.HandlerMiddleware that sets up the default // values for the plugin request meta in the context.Context. All middlewares that are executed // after this one are be able to access plugin request meta via the pluginrequestmeta package. func NewPluginRequestMetaMiddleware() backend.HandlerMiddleware { return backend.HandlerMiddlewareFunc(func(next backend.Handler) backend.Handler { return &PluginRequestMetaMiddleware{ BaseHandler: backend.NewBaseHandler(next), defaultStatusSource: pluginrequestmeta.DefaultStatusSource, } }) } type PluginRequestMetaMiddleware struct { backend.BaseHandler defaultStatusSource pluginrequestmeta.StatusSource } func (m *PluginRequestMetaMiddleware) withDefaultPluginRequestMeta(ctx context.Context) context.Context { // Setup plugin request status source ctx = pluginrequestmeta.WithStatusSource(ctx, m.defaultStatusSource) return ctx } func (m *PluginRequestMetaMiddleware) QueryData(ctx context.Context, req *backend.QueryDataRequest) (*backend.QueryDataResponse, error) { ctx = m.withDefaultPluginRequestMeta(ctx) return m.BaseHandler.QueryData(ctx, req) } func (m *PluginRequestMetaMiddleware) CallResource(ctx context.Context, req *backend.CallResourceRequest, sender backend.CallResourceResponseSender) error { ctx = m.withDefaultPluginRequestMeta(ctx) return m.BaseHandler.CallResource(ctx, req, sender) } func (m *PluginRequestMetaMiddleware) CheckHealth(ctx context.Context, req *backend.CheckHealthRequest) (*backend.CheckHealthResult, error) { ctx = m.withDefaultPluginRequestMeta(ctx) return m.BaseHandler.CheckHealth(ctx, req) } func (m *PluginRequestMetaMiddleware) CollectMetrics(ctx context.Context, req *backend.CollectMetricsRequest) (*backend.CollectMetricsResult, error) { ctx = m.withDefaultPluginRequestMeta(ctx) return m.BaseHandler.CollectMetrics(ctx, req) } func (m *PluginRequestMetaMiddleware) SubscribeStream(ctx context.Context, req *backend.SubscribeStreamRequest) (*backend.SubscribeStreamResponse, error) { ctx = m.withDefaultPluginRequestMeta(ctx) return m.BaseHandler.SubscribeStream(ctx, req) } func (m *PluginRequestMetaMiddleware) PublishStream(ctx context.Context, req *backend.PublishStreamRequest) (*backend.PublishStreamResponse, error) { ctx = m.withDefaultPluginRequestMeta(ctx) return m.BaseHandler.PublishStream(ctx, req) } func (m *PluginRequestMetaMiddleware) RunStream(ctx context.Context, req *backend.RunStreamRequest, sender *backend.StreamSender) error { ctx = m.withDefaultPluginRequestMeta(ctx) return m.BaseHandler.RunStream(ctx, req, sender) } // ValidateAdmission implements backend.AdmissionHandler. func (m *PluginRequestMetaMiddleware) ValidateAdmission(ctx context.Context, req *backend.AdmissionRequest) (*backend.ValidationResponse, error) { ctx = m.withDefaultPluginRequestMeta(ctx) return m.BaseHandler.ValidateAdmission(ctx, req) } // MutateAdmission implements backend.AdmissionHandler. func (m *PluginRequestMetaMiddleware) MutateAdmission(ctx context.Context, req *backend.AdmissionRequest) (*backend.MutationResponse, error) { ctx = m.withDefaultPluginRequestMeta(ctx) return m.BaseHandler.MutateAdmission(ctx, req) } // ConvertObject implements backend.AdmissionHandler. func (m *PluginRequestMetaMiddleware) ConvertObjects(ctx context.Context, req *backend.ConversionRequest) (*backend.ConversionResponse, error) { ctx = m.withDefaultPluginRequestMeta(ctx) return m.BaseHandler.ConvertObjects(ctx, req) }