From 0b3928dafbd147339343f13ab0bc8c99d486b31e Mon Sep 17 00:00:00 2001
From: emile <emile@vauge.com>
Date: Sat, 3 Oct 2015 16:50:53 +0200
Subject: [PATCH] Add /api/providers API

---
 file.go | 46 ++++++++++++++++++++++------------------------
 web.go  |  6 ++++++
 2 files changed, 28 insertions(+), 24 deletions(-)

diff --git a/file.go b/file.go
index c567a5038..11a12cb0c 100644
--- a/file.go
+++ b/file.go
@@ -21,7 +21,6 @@ func (provider *FileProvider) Provide(configurationChan chan<- configMessage) er
 		log.Error("Error creating file watcher", err)
 		return err
 	}
-	defer watcher.Close()
 
 	file, err := os.Open(provider.Filename)
 	if err != nil {
@@ -30,31 +29,30 @@ func (provider *FileProvider) Provide(configurationChan chan<- configMessage) er
 	}
 	defer file.Close()
 
-	// Process events
-	go func() {
-		for {
-			select {
-			case event := <-watcher.Events:
-				if strings.Contains(event.Name, file.Name()) {
-					log.Debug("File event:", event)
-					configuration := provider.LoadFileConfig(file.Name())
-					if configuration != nil {
-						configurationChan <- configMessage{"file", configuration}
-					}
-				}
-			case error := <-watcher.Errors:
-				log.Error("Watcher event error", error)
-			}
-		}
-	}()
-
 	if provider.Watch {
+		// Process events
+		go func() {
+			defer watcher.Close()
+			for {
+				select {
+				case event := <-watcher.Events:
+					if strings.Contains(event.Name, file.Name()) {
+						log.Debug("File event:", event)
+						configuration := provider.LoadFileConfig(file.Name())
+						if configuration != nil {
+							configurationChan <- configMessage{"file", configuration}
+						}
+					}
+				case error := <-watcher.Errors:
+					log.Error("Watcher event error", error)
+				}
+			}
+		}()
 		err = watcher.Add(filepath.Dir(file.Name()))
-	}
-
-	if err != nil {
-		log.Error("Error adding file watcher", err)
-		return err
+		if err != nil {
+			log.Error("Error adding file watcher", err)
+			return err
+		}
 	}
 
 	configuration := provider.LoadFileConfig(file.Name())
diff --git a/web.go b/web.go
index fb21eece4..f5a0d26c7 100644
--- a/web.go
+++ b/web.go
@@ -6,6 +6,7 @@ import (
 	"io/ioutil"
 	"net/http"
 
+	"github.com/BurntSushi/ty/fun"
 	log "github.com/Sirupsen/logrus"
 	"github.com/elazarl/go-bindata-assetfs"
 	"github.com/gorilla/mux"
@@ -25,6 +26,7 @@ func (provider *WebProvider) Provide(configurationChan chan<- configMessage) err
 	systemRouter.Methods("GET").Path("/").Handler(http.HandlerFunc(GetHTMLConfigHandler))
 	systemRouter.Methods("GET").Path("/health").Handler(http.HandlerFunc(GetHealthHandler))
 	systemRouter.Methods("GET").Path("/api").Handler(http.HandlerFunc(GetConfigHandler))
+	systemRouter.Methods("GET").Path("/api/providers").Handler(http.HandlerFunc(GetProvidersHandler))
 	systemRouter.Methods("GET").Path("/api/{provider}").Handler(http.HandlerFunc(GetConfigHandler))
 	systemRouter.Methods("PUT").Path("/api/{provider}").Handler(http.HandlerFunc(
 		func(rw http.ResponseWriter, r *http.Request) {
@@ -82,6 +84,10 @@ func GetHealthHandler(rw http.ResponseWriter, r *http.Request) {
 	templatesRenderer.JSON(rw, http.StatusOK, metrics.Data())
 }
 
+func GetProvidersHandler(rw http.ResponseWriter, r *http.Request) {
+	templatesRenderer.JSON(rw, http.StatusOK, fun.Keys(currentConfigurations))
+}
+
 func GetBackendsHandler(rw http.ResponseWriter, r *http.Request) {
 	vars := mux.Vars(r)
 	providerId := vars["provider"]