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serve.go
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serve.go
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package main
import (
"errors"
"fmt"
"io/ioutil"
"log"
"net"
"net/http"
"github.com/spf13/cobra"
"golang.org/x/net/context"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
yaml "gopkg.in/yaml.v2"
"github.com/coreos/dex/api"
"github.com/coreos/dex/server"
"github.com/coreos/dex/storage"
)
func commandServe() *cobra.Command {
return &cobra.Command{
Use: "serve [ config file ]",
Short: "Connect to the storage and begin serving requests.",
Long: ``,
Example: "dex serve config.yaml",
RunE: serve,
}
}
func serve(cmd *cobra.Command, args []string) error {
switch len(args) {
default:
return errors.New("surplus arguments")
case 0:
// TODO(ericchiang): Consider having a default config file location.
return errors.New("no config file specified")
case 1:
}
configFile := args[0]
configData, err := ioutil.ReadFile(configFile)
if err != nil {
return fmt.Errorf("read config file %s: %v", configFile, err)
}
var c Config
if err := yaml.Unmarshal(configData, &c); err != nil {
return fmt.Errorf("parse config file %s: %v", configFile, err)
}
// Fast checks. Perform these first for a more responsive CLI.
checks := []struct {
bad bool
errMsg string
}{
{c.Issuer == "", "no issuer specified in config file"},
{len(c.Connectors) == 0 && !c.EnablePasswordDB, "no connectors supplied in config file"},
{!c.EnablePasswordDB && len(c.StaticPasswords) != 0, "cannot specify static passwords without enabling password db"},
{c.Storage.Config == nil, "no storage suppied in config file"},
{c.Web.HTTP == "" && c.Web.HTTPS == "", "must supply a HTTP/HTTPS address to listen on"},
{c.Web.HTTPS != "" && c.Web.TLSCert == "", "no cert specified for HTTPS"},
{c.Web.HTTPS != "" && c.Web.TLSKey == "", "no private key specified for HTTPS"},
{c.GRPC.TLSCert != "" && c.GRPC.Addr == "", "no address specified for gRPC"},
{c.GRPC.TLSKey != "" && c.GRPC.Addr == "", "no address specified for gRPC"},
{(c.GRPC.TLSCert == "") != (c.GRPC.TLSKey == ""), "must specific both a gRPC TLS cert and key"},
}
for _, check := range checks {
if check.bad {
return errors.New(check.errMsg)
}
}
var grpcOptions []grpc.ServerOption
if c.GRPC.TLSCert != "" {
opt, err := credentials.NewServerTLSFromFile(c.GRPC.TLSCert, c.GRPC.TLSKey)
if err != nil {
return fmt.Errorf("load grpc certs: %v", err)
}
grpcOptions = append(grpcOptions, grpc.Creds(opt))
}
connectors := make([]server.Connector, len(c.Connectors))
for i, conn := range c.Connectors {
if conn.Config == nil {
return fmt.Errorf("no config field for connector %q", conn.ID)
}
c, err := conn.Config.Open()
if err != nil {
return fmt.Errorf("open %s: %v", conn.ID, err)
}
connectors[i] = server.Connector{
ID: conn.ID,
DisplayName: conn.Name,
Connector: c,
}
}
s, err := c.Storage.Config.Open()
if err != nil {
return fmt.Errorf("initializing storage: %v", err)
}
if len(c.StaticClients) > 0 {
s = storage.WithStaticClients(s, c.StaticClients)
}
if len(c.StaticPasswords) > 0 {
p := make([]storage.Password, len(c.StaticPasswords))
for i, pw := range c.StaticPasswords {
if p[i], err = pw.toPassword(); err != nil {
return err
}
}
s = storage.WithStaticPasswords(s, p)
}
serverConfig := server.Config{
SupportedResponseTypes: c.OAuth2.ResponseTypes,
SkipApprovalScreen: c.OAuth2.SkipApprovalScreen,
Issuer: c.Issuer,
Connectors: connectors,
Storage: s,
TemplateConfig: c.Templates,
EnablePasswordDB: c.EnablePasswordDB,
}
serv, err := server.NewServer(context.Background(), serverConfig)
if err != nil {
return fmt.Errorf("initializing server: %v", err)
}
errc := make(chan error, 3)
if c.Web.HTTP != "" {
log.Printf("listening (http) on %s", c.Web.HTTP)
go func() {
errc <- http.ListenAndServe(c.Web.HTTP, serv)
}()
}
if c.Web.HTTPS != "" {
log.Printf("listening (https) on %s", c.Web.HTTPS)
go func() {
errc <- http.ListenAndServeTLS(c.Web.HTTPS, c.Web.TLSCert, c.Web.TLSKey, serv)
}()
}
if c.GRPC.Addr != "" {
log.Printf("listening (grpc) on %s", c.GRPC.Addr)
go func() {
errc <- func() error {
list, err := net.Listen("tcp", c.GRPC.Addr)
if err != nil {
return fmt.Errorf("listen grpc: %v", err)
}
s := grpc.NewServer(grpcOptions...)
api.RegisterDexServer(s, server.NewAPI(serverConfig.Storage))
return s.Serve(list)
}()
}()
}
return <-errc
}