webdav: allow specification of a different public_url than upload url

conf/defaults.ini

@@ -444,3 +444,4 @@ secret_key =
 url =
 username =
 password =
+public_url =

conf/sample.ini

@@ -399,5 +399,6 @@
 
 [external_image_storage.webdav]
 ;url =
+;public_url =
 ;username =
 ;password =

docs/sources/installation/configuration.md

@@ -644,6 +644,9 @@ Secret key. e.g. AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
 ### url
 Url to where Grafana will send PUT request with images
 
+### public_url
+Url to send to users in notifications, directly appended with the resulting uploaded file name
+
 ### username
 basic auth username
 

pkg/components/imguploader/imguploader.go

@@ -47,10 +47,11 @@ func NewImageUploader() (ImageUploader, error) {
 			return nil, fmt.Errorf("Could not find url key for image.uploader.webdav")
 		}
 
+		public_url := webdavSec.Key("public_url").String()
 		username := webdavSec.Key("username").String()
 		password := webdavSec.Key("password").String()
 
-		return NewWebdavImageUploader(url, username, password)
+		return NewWebdavImageUploader(url, username, password, public_url)
 	}
 
 	return NopImageUploader{}, nil

pkg/components/imguploader/webdavuploader.go

@@ -14,9 +14,10 @@ import (
 )
 
 type WebdavUploader struct {
-	url      string
-	username string
-	password string
+	url        string
+	username   string
+	password   string
+	public_url string
 }
 
 var netTransport = &http.Transport{
@@ -33,7 +34,8 @@ var netClient = &http.Client{
 
 func (u *WebdavUploader) Upload(pa string) (string, error) {
 	url, _ := url.Parse(u.url)
-	url.Path = path.Join(url.Path, util.GetRandomString(20)+".png")
+	filename := util.GetRandomString(20) + ".png"
+	url.Path = path.Join(url.Path, filename)
 
 	imgData, err := ioutil.ReadFile(pa)
 	req, err := http.NewRequest("PUT", url.String(), bytes.NewReader(imgData))
@@ -53,13 +55,18 @@ func (u *WebdavUploader) Upload(pa string) (string, error) {
 		return "", fmt.Errorf("Failed to upload image. Returned statuscode %v body %s", res.StatusCode, body)
 	}
 
-	return url.String(), nil
+	if u.public_url != "" {
+		return (u.public_url + filename), nil
+	} else {
+		return url.String(), nil
+	}
 }
 
-func NewWebdavImageUploader(url, username, passwrod string) (*WebdavUploader, error) {
+func NewWebdavImageUploader(url, username, password, public_url string) (*WebdavUploader, error) {
 	return &WebdavUploader{
-		url:      url,
-		username: username,
-		password: passwrod,
+		url:        url,
+		username:   username,
+		password:   password,
+		public_url: public_url,
 	}, nil
 }

pkg/components/imguploader/webdavuploader_test.go

@@ -7,7 +7,7 @@ import (
 )
 
 func TestUploadToWebdav(t *testing.T) {
-	webdavUploader, _ := NewWebdavImageUploader("http://localhost:9998/dav/", "username", "password")
+	webdavUploader, _ := NewWebdavImageUploader("http://localhost:9998/dav/", "username", "password", "")
 
 	SkipConvey("[Integration test] for external_image_store.webdav", t, func() {
 		path, err := webdavUploader.Upload("../../../public/img/logo_transparent_400x.png")