package rest import ( "encoding/json" "fmt" "net/http" "github.com/gorilla/mux" "github.com/traefik/traefik/v2/pkg/config/dynamic" "github.com/traefik/traefik/v2/pkg/log" "github.com/traefik/traefik/v2/pkg/provider" "github.com/traefik/traefik/v2/pkg/safe" "github.com/unrolled/render" ) var _ provider.Provider = (*Provider)(nil) // Provider is a provider.Provider implementation that provides a Rest API. type Provider struct { Insecure bool `description:"Activate REST Provider directly on the entryPoint named traefik." json:"insecure,omitempty" toml:"insecure,omitempty" yaml:"insecure,omitempty" export:"true"` 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 } // CreateRouter creates a router for the Rest API. func (p *Provider) CreateRouter() *mux.Router { router := mux.NewRouter() router.Methods(http.MethodPut).Path("/api/providers/{provider}").Handler(p) return router } func (p *Provider) ServeHTTP(rw http.ResponseWriter, req *http.Request) { vars := mux.Vars(req) if vars["provider"] != "rest" { http.Error(rw, "Only 'rest' provider can be updated through the REST API", http.StatusBadRequest) return } configuration := new(dynamic.Configuration) if err := json.NewDecoder(req.Body).Decode(configuration); err != nil { log.WithoutContext().Errorf("Error parsing configuration %+v", err) http.Error(rw, fmt.Sprintf("%+v", err), http.StatusBadRequest) return } p.configurationChan <- dynamic.Message{ProviderName: "rest", Configuration: configuration} if err := templatesRenderer.JSON(rw, 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 }