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server.go
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server.go
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package server
import (
"context"
"errors"
"net/http"
"github.com/acorn-io/brent/pkg/accesscontrol"
"github.com/acorn-io/brent/pkg/auth"
"github.com/acorn-io/brent/pkg/client"
schemacontroller "github.com/acorn-io/brent/pkg/controllers/schema"
"github.com/acorn-io/brent/pkg/resources"
"github.com/acorn-io/brent/pkg/resources/common"
"github.com/acorn-io/brent/pkg/resources/schemas"
"github.com/acorn-io/brent/pkg/schema"
"github.com/acorn-io/brent/pkg/server/handler"
"github.com/acorn-io/brent/pkg/server/router"
"github.com/acorn-io/brent/pkg/types"
"k8s.io/client-go/rest"
)
var ErrConfigRequired = errors.New("rest config is required")
type Server struct {
http.Handler
ClientFactory *client.Factory
SchemaFactory schema.Factory
RESTConfig *rest.Config
BaseSchemas *types.APISchemas
AccessSetLookup accesscontrol.AccessSetLookup
APIServer *handler.Server
Version string
authMiddleware auth.Middleware
controllers *Controllers
needControllerStart bool
next http.Handler
router router.RouterFunc
}
type Options struct {
// Controllers If the controllers are passed in the caller must also start the controllers
Controllers *Controllers
ClientFactory *client.Factory
AccessSetLookup accesscontrol.AccessSetLookup
AuthMiddleware auth.Middleware
Next http.Handler
Router router.RouterFunc
ServerVersion string
}
func New(ctx context.Context, restConfig *rest.Config, opts *Options) (*Server, error) {
if opts == nil {
opts = &Options{}
}
server := &Server{
RESTConfig: restConfig,
ClientFactory: opts.ClientFactory,
AccessSetLookup: opts.AccessSetLookup,
authMiddleware: opts.AuthMiddleware,
controllers: opts.Controllers,
next: opts.Next,
router: opts.Router,
Version: opts.ServerVersion,
}
if err := setup(ctx, server); err != nil {
return nil, err
}
return server, server.start(ctx)
}
func setDefaults(server *Server) error {
if server.RESTConfig == nil {
return ErrConfigRequired
}
if server.controllers == nil {
var err error
server.controllers, err = NewController(server.RESTConfig)
server.needControllerStart = true
if err != nil {
return err
}
}
if server.next == nil {
server.next = http.NotFoundHandler()
}
if server.BaseSchemas == nil {
server.BaseSchemas = types.EmptyAPISchemas()
}
return nil
}
func setup(ctx context.Context, server *Server) error {
err := setDefaults(server)
if err != nil {
return err
}
cf := server.ClientFactory
if cf == nil {
cf, err = client.NewFactory(server.RESTConfig, server.authMiddleware != nil)
if err != nil {
return err
}
server.ClientFactory = cf
}
asl := server.AccessSetLookup
if asl == nil {
asl, err = accesscontrol.NewAccessStore(ctx, true, server.controllers.Router)
if err != nil {
return err
}
}
sf := schema.NewCollection(ctx, server.BaseSchemas, asl)
if err = resources.DefaultSchemas(server.BaseSchemas, sf, server.Version); err != nil {
return err
}
for _, template := range resources.DefaultSchemaTemplates(cf, asl, server.controllers.K8s.Discovery()) {
sf.AddTemplate(template)
}
cols, err := common.NewDynamicColumns(server.RESTConfig)
if err != nil {
return err
}
schemas.SetupWatcher(ctx, server.BaseSchemas, asl, sf)
schemacontroller.Register(ctx,
cols,
server.controllers.K8s.Discovery(),
server.controllers.Router,
sf)
apiServer, handler, err := handler.New(server.RESTConfig, sf, server.authMiddleware, server.next, server.router)
if err != nil {
return err
}
server.APIServer = apiServer
server.Handler = handler
server.SchemaFactory = sf
return nil
}
func (c *Server) start(ctx context.Context) error {
if c.needControllerStart {
if err := c.controllers.Start(ctx); err != nil {
return err
}
}
return nil
}