From c100102253a5fae3612a3b187d3eb3ac45b5f4f9 Mon Sep 17 00:00:00 2001
From: Thomas Boerger <thomas@webhippie.de>
Date: Mon, 9 Dec 2019 14:48:37 +0100
Subject: [PATCH] Add custom http root

Now we are able to let this service run on a different root path.
---
 docs/content/getting-started.md | 6 ++++++
 pkg/command/server.go           | 8 ++++++++
 pkg/config/config.go            | 1 +
 pkg/flagset/flagset.go          | 7 +++++++
 pkg/service/v0/service.go       | 9 +++++++--
 5 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/docs/content/getting-started.md b/docs/content/getting-started.md
index fe7837ea95b..4282ad17b84 100644
--- a/docs/content/getting-started.md
+++ b/docs/content/getting-started.md
@@ -71,6 +71,9 @@ WEBDAV_DEBUG_ZPAGES
 WEBDAV_HTTP_ADDR
 : Address to bind http server, defaults to `0.0.0.0:9115`
 
+WEBDAV_HTTP_ROOT
+: Root path of http server, defaults to `/`
+
 ##### Health
 
 WEBDAV_DEBUG_ADDR
@@ -126,6 +129,9 @@ If you prefer to configure the service with commandline flags you can see the av
 --http-addr
 : Address to bind http server, defaults to `0.0.0.0:9115`
 
+--http-root
+: Root path of http server, defaults to `/`
+
 ##### Health
 
 --debug-addr
diff --git a/pkg/command/server.go b/pkg/command/server.go
index d33af6950d7..4f1ec5566e3 100644
--- a/pkg/command/server.go
+++ b/pkg/command/server.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"os"
 	"os/signal"
+	"strings"
 	"time"
 
 	"contrib.go.opencensus.io/exporter/jaeger"
@@ -28,6 +29,13 @@ func Server(cfg *config.Config) cli.Command {
 		Name:  "server",
 		Usage: "Start integrated server",
 		Flags: flagset.ServerWithConfig(cfg),
+		Before: func(c *cli.Context) error {
+			if cfg.HTTP.Root != "/" {
+				cfg.HTTP.Root = strings.TrimSuffix(cfg.HTTP.Root, "/")
+			}
+
+			return nil
+		},
 		Action: func(c *cli.Context) error {
 			logger := NewLogger(cfg)
 
diff --git a/pkg/config/config.go b/pkg/config/config.go
index 0f56402e211..8067a011dc8 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -18,6 +18,7 @@ type Debug struct {
 // HTTP defines the available http configuration.
 type HTTP struct {
 	Addr string
+	Root string
 }
 
 // Tracing defines the available tracing configuration.
diff --git a/pkg/flagset/flagset.go b/pkg/flagset/flagset.go
index 9528eae80fb..a414d238a9b 100644
--- a/pkg/flagset/flagset.go
+++ b/pkg/flagset/flagset.go
@@ -120,5 +120,12 @@ func ServerWithConfig(cfg *config.Config) []cli.Flag {
 			EnvVar:      "WEBDAV_HTTP_ADDR",
 			Destination: &cfg.HTTP.Addr,
 		},
+		&cli.StringFlag{
+			Name:        "http-root",
+			Value:       "/",
+			Usage:       "Root path of http server",
+			EnvVar:      "WEBDAV_HTTP_ROOT",
+			Destination: &cfg.HTTP.Root,
+		},
 	}
 }
diff --git a/pkg/service/v0/service.go b/pkg/service/v0/service.go
index 4a180b5f3ef..1ea39f58942 100644
--- a/pkg/service/v0/service.go
+++ b/pkg/service/v0/service.go
@@ -25,7 +25,9 @@ func NewService(opts ...Option) Service {
 		mux:    m,
 	}
 
-	m.HandleFunc("/", svc.Dummy)
+	m.Route(options.Config.HTTP.Root, func(r chi.Router) {
+		r.Get("/", svc.Dummy)
+	})
 
 	return svc
 }
@@ -43,5 +45,8 @@ func (g Webdav) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 
 // Dummy implements the Service interface.
 func (g Webdav) Dummy(w http.ResponseWriter, r *http.Request) {
-	http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+	w.Header().Set("Content-Type", "text/plain")
+	w.WriteHeader(http.StatusOK)
+
+	w.Write([]byte(http.StatusText(http.StatusOK)))
 }