refactor idp

Signed-off-by: Christian Richter <crichter@owncloud.com>

extensions/idp/pkg/server/debug/option.go

@@ -0,0 +1,50 @@
+package debug
+
+import (
+	"context"
+
+	"github.com/owncloud/ocis/extensions/idp/pkg/config"
+	"github.com/owncloud/ocis/ocis-pkg/log"
+)
+
+// Option defines a single option function.
+type Option func(o *Options)
+
+// Options defines the available options for this package.
+type Options struct {
+	Logger  log.Logger
+	Context context.Context
+	Config  *config.Config
+}
+
+// newOptions initializes the available default options.
+func newOptions(opts ...Option) Options {
+	opt := Options{}
+
+	for _, o := range opts {
+		o(&opt)
+	}
+
+	return opt
+}
+
+// Logger provides a function to set the logger option.
+func Logger(val log.Logger) Option {
+	return func(o *Options) {
+		o.Logger = val
+	}
+}
+
+// Context provides a function to set the context option.
+func Context(val context.Context) Option {
+	return func(o *Options) {
+		o.Context = val
+	}
+}
+
+// Config provides a function to set the config option.
+func Config(val *config.Config) Option {
+	return func(o *Options) {
+		o.Config = val
+	}
+}

extensions/idp/pkg/server/debug/server.go

@@ -0,0 +1,70 @@
+package debug
+
+import (
+	"io"
+	"net/http"
+	"net/url"
+
+	"github.com/owncloud/ocis/extensions/idp/pkg/config"
+	"github.com/owncloud/ocis/ocis-pkg/log"
+	"github.com/owncloud/ocis/ocis-pkg/service/debug"
+	"github.com/owncloud/ocis/ocis-pkg/shared"
+	"github.com/owncloud/ocis/ocis-pkg/version"
+)
+
+// Server initializes the debug service and server.
+func Server(opts ...Option) (*http.Server, error) {
+	options := newOptions(opts...)
+
+	return debug.NewService(
+		debug.Logger(options.Logger),
+		debug.Name(options.Config.Service.Name),
+		debug.Version(version.String),
+		debug.Address(options.Config.Debug.Addr),
+		debug.Token(options.Config.Debug.Token),
+		debug.Pprof(options.Config.Debug.Pprof),
+		debug.Zpages(options.Config.Debug.Zpages),
+		debug.Health(health(options.Config, options.Logger)),
+		debug.Ready(ready(options.Config)),
+	), nil
+}
+
+// health implements the health check.
+func health(cfg *config.Config, l log.Logger) func(http.ResponseWriter, *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		targetHost, err := url.Parse(cfg.Ldap.URI)
+		if err != nil {
+			l.Fatal().Err(err).Str("uri", cfg.Ldap.URI).Msg("invalid LDAP URI")
+		}
+		err = shared.RunChecklist(shared.TCPConnect(targetHost.Host))
+		retVal := http.StatusOK
+		if err != nil {
+			l.Error().Err(err).Msg("Healtcheck failed")
+			retVal = http.StatusInternalServerError
+		}
+		w.Header().Set("Content-Type", "text/plain")
+		w.WriteHeader(retVal)
+
+		_, err = io.WriteString(w, http.StatusText(retVal))
+		if err != nil {
+			l.Fatal().Err(err).Msg("Could not write health check body")
+		}
+	}
+}
+
+// ready implements the ready check.
+func ready(cfg *config.Config) func(http.ResponseWriter, *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "text/plain")
+		w.WriteHeader(http.StatusOK)
+		// if we can call this function, a http(200) is a valid response as
+		// there is nothing we can check at this point for IDP
+		// if there is a mishap when initializing, there is a minimal (talking ms or ns window)
+		// timeframe where this code is callable
+		_, err := io.WriteString(w, http.StatusText(http.StatusOK))
+		// io.WriteString should not fail but if it does we want to know.
+		if err != nil {
+			panic(err)
+		}
+	}
+}