Render and sanitize chat messages server-side. (owncast#237)

* Render and sanitize chat messages server-side. Closes owncast#235

* Render content.md server-side and return it in the client config

* Remove showdown from web project

* Update api spec

* Move example user content file

build/javascript/package.json

@@ -10,7 +10,6 @@
     "@videojs/themes": "^1.0.0",
     "htm": "^3.0.4",
     "preact": "^10.5.3",
-    "showdown": "^1.9.1",
     "tailwindcss": "^1.8.10",
     "video.js": "^7.9.6"
   },
@@ -27,7 +26,6 @@
       "@justinribeiro/lite-youtube",
       "htm",
       "preact",
-      "showdown",
       "tailwindcss/dist/tailwind.min.css"
     ]
   },

config/config.go

@@ -28,15 +28,15 @@ type config struct {
 
 // InstanceDetails defines the user-visible information about this particular instance.
 type InstanceDetails struct {
-	Name          string         `yaml:"name" json:"name"`
-	Title         string         `yaml:"title" json:"title"`
-	Summary       string         `yaml:"summary" json:"summary"`
-	Logo          logo           `yaml:"logo" json:"logo"`
-	Tags          []string       `yaml:"tags" json:"tags"`
-	SocialHandles []socialHandle `yaml:"socialHandles" json:"socialHandles"`
-	ExtraInfoFile string         `yaml:"extraUserInfoFileName" json:"extraUserInfoFileName"`
-	Version       string         `json:"version"`
-	NSFW          bool           `yaml:"nsfw" json:"nsfw"`
+	Name             string         `yaml:"name" json:"name"`
+	Title            string         `yaml:"title" json:"title"`
+	Summary          string         `yaml:"summary" json:"summary"`
+	Logo             logo           `yaml:"logo" json:"logo"`
+	Tags             []string       `yaml:"tags" json:"tags"`
+	SocialHandles    []socialHandle `yaml:"socialHandles" json:"socialHandles"`
+	Version          string         `json:"version"`
+	NSFW             bool           `yaml:"nsfw" json:"nsfw"`
+	ExtraUserContent string         `json:"extraUserContent"`
 }
 
 type logo struct {
@@ -118,6 +118,13 @@ func (c *config) load(filePath string) error {
 
 	c.VideoSettings.HighestQualityStreamIndex = findHighestQuality(c.VideoSettings.StreamQualities)
 
+	// Add custom page content to the instance details.
+	customContentMarkdownData, err := ioutil.ReadFile(ExtraInfoFile)
+	if err == nil {
+		customContentMarkdownString := string(customContentMarkdownData)
+		c.InstanceDetails.ExtraUserContent = utils.RenderSimpleMarkdown(customContentMarkdownString)
+	}
+
 	return nil
 }
 
@@ -224,14 +231,5 @@ func Load(filePath string, versionInfo string) error {
 
 	Config.VersionInfo = versionInfo
 
-	// Defaults
-
-	// This is relative to the webroot, not the project root.
-	// Has to be set here instead of pulled from a getter
-	// since it's serialized to JSON.
-	if Config.InstanceDetails.ExtraInfoFile == "" {
-		Config.InstanceDetails.ExtraInfoFile = _default.InstanceDetails.ExtraInfoFile
-	}
-
 	return Config.verifySettings()
 }

config/constants.go

@@ -6,6 +6,7 @@ const (
 	WebRoot               = "webroot"
 	PrivateHLSStoragePath = "hls"
 	GeoIPDatabasePath     = "data/GeoLite2-City.mmdb"
+	ExtraInfoFile         = "data/content.md"
 )
 
 var (

config/defaults.go

@@ -13,7 +13,6 @@ func getDefaults() config {
 	defaults.VideoSettings.ChunkLengthInSeconds = 4
 	defaults.Files.MaxNumberInPlaylist = 5
 	defaults.VideoSettings.OfflineContent = "static/offline.m4v"
-	defaults.InstanceDetails.ExtraInfoFile = "/static/content.md"
 	defaults.YP.Enabled = false
 	defaults.YP.YPServiceURL = "https://yp.owncast.online"