package rest import ( "encoding/json" "fmt" "io/ioutil" "net/http" "github.com/containous/traefik/v2/pkg/config/dynamic" "github.com/containous/traefik/v2/pkg/log" "github.com/containous/traefik/v2/pkg/provider" "github.com/containous/traefik/v2/pkg/safe" "github.com/gorilla/mux" "github.com/unrolled/render" ) var _ provider.Provider = (*Provider)(nil) // Provider is a provider.Provider implementation that provides a Rest API. type Provider struct { configurationChan chan<- dynamic.Message } // SetDefaults sets the default values. func (p *Provider) SetDefaults() { } var templatesRenderer = render.New(render.Options{Directory: "nowhere"}) // Init the provider. func (p *Provider) Init() error { return nil } // Append add rest provider routes on a router. func (p *Provider) Append(systemRouter *mux.Router) { systemRouter. Methods(http.MethodPut). Path("/api/providers/{provider}"). HandlerFunc(func(response http.ResponseWriter, request *http.Request) { vars := mux.Vars(request) if vars["provider"] != "rest" { response.WriteHeader(http.StatusBadRequest) fmt.Fprint(response, "Only 'rest' provider can be updated through the REST API") return } configuration := new(dynamic.Configuration) body, _ := ioutil.ReadAll(request.Body) if err := json.Unmarshal(body, configuration); err != nil { log.WithoutContext().Errorf("Error parsing configuration %+v", err) http.Error(response, fmt.Sprintf("%+v", err), http.StatusBadRequest) return } p.configurationChan <- dynamic.Message{ProviderName: "rest", Configuration: configuration} if err := templatesRenderer.JSON(response, http.StatusOK, configuration); err != nil { log.WithoutContext().Error(err) } }) } // Provide allows the provider to provide configurations to traefik // using the given configuration channel. func (p *Provider) Provide(configurationChan chan<- dynamic.Message, pool *safe.Pool) error { p.configurationChan = configurationChan return nil }