traefik/pkg/provider/rest/rest.go
2019-07-10 09:26:04 +02:00

74 lines
2.2 KiB
Go

package rest
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"github.com/containous/mux"
"github.com/containous/traefik/pkg/config/dynamic"
"github.com/containous/traefik/pkg/log"
"github.com/containous/traefik/pkg/provider"
"github.com/containous/traefik/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 {
configurationChan chan<- dynamic.Message
EntryPoint string `description:"EntryPoint." json:"entryPoint,omitempty" toml:"entryPoint,omitempty" yaml:"entryPoint,omitempty" export:"true"`
}
// SetDefaults sets the default values.
func (p *Provider) SetDefaults() {
p.EntryPoint = "traefik"
}
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.HTTPConfiguration)
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: &dynamic.Configuration{
HTTP: 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
}