Display pages: Add OpenGraph tags for media

display.go

@@ -122,6 +122,7 @@ func fileDisplayHandler(c web.C, w http.ResponseWriter, r *http.Request, fileNam
 		"forcerandom": Config.forceRandomFilename,
 		"lines":       lines,
 		"files":       metadata.ArchiveFiles,
+		"siteurl":     strings.TrimSuffix(getSiteURL(r), "/"),
 	}, r, w)
 
 	if err != nil {

templates/display/audio.html

@@ -1,9 +1,12 @@
 {% extends "base.html" %}
 
+{% block head %}
+<meta property="og:audio" content="{{ siteurl }}{{ sitepath }}{{ selifpath }}{{ filename }}" />
+{% endblock %}
+
 {% block main %}
 <audio class="display-audio" controls preload='auto'>
     <source src='{{ sitepath }}{{ selifpath }}{{ filename }}'>
     <a href='{{ sitepath }}{{ selifpath }}{{ filename }}'>Download it instead</a>
 </audio>
 {% endblock %}
-

templates/display/image.html

@@ -1,5 +1,9 @@
 {% extends "base.html" %}
 
+{% block head %}
+<meta property="og:image" content="{{ siteurl }}{{ sitepath }}{{ selifpath }}{{ filename }}" />
+{% endblock %}
+
 {% block main %}
 <a href="{{ sitepath }}{{ selifpath }}{{ filename }}">
     <img class="display-image" src="{{ sitepath }}{{ selifpath }}{{ filename }}" />

templates/display/video.html

@@ -1,8 +1,12 @@
 {% extends "base.html" %}
 
+{% block head %}
+<meta property="og:video" content="{{ siteurl }}{{ sitepath }}{{ selifpath }}{{ filename }}" />
+{% endblock %}
+
 {% block main %}
 <video class="display-video" controls autoplay>
-    <source src="{{ sitepath }}{{ selifpath }}{{ filename }}"/>
+    <source src="{{ sitepath }}{{ selifpath }}{{ filename }}" />
     <a href='{{ sitepath }}{{ selifpath }}{{ filename }}'>Download it instead</a>
 </video>
 {% endblock %}