Implemented experimental ajax crawling support to get better social integration with open graph tags.

longsleep · longsleep · commit 763ddd7f44b4 · 2014-05-23T13:30:28.000+02:00
diff --git a/html/crawler.html b/html/crawler.html
@@ -0,0 +1,10 @@
+<%define "crawlerPage"%><!doctype html>
+<html>
+<head>
+<meta property="og:title" content="/<%.Room%>" />
+<meta property="og:site_name" content="<%.Cfg.Title%>"/>
+<meta property="og:image" content="<%.Scheme%>://<%.Host%><%.Cfg.B%>static/img/opengraph-image.png" />
+<meta property="og:type" content="article" />
+</head>
+<body></body>
+</html><%end%>
diff --git a/html/head.html b/html/head.html
@@ -1,4 +1,5 @@
 <%define "head"%><title><%.Cfg.Title%></title>
+<meta name="fragment" content="!">
 <meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no">
 <meta name="apple-mobile-web-app-capable" content="yes">
 <meta name="mobile-web-app-capable" content="yes">
diff --git a/src/app/spreed-webrtc-server/context.go b/src/app/spreed-webrtc-server/context.go
@@ -27,4 +27,6 @@ type Context struct {
 	Host      string
 	Ssl       bool
 	Languages []string
+	Room      string `json:"-"`
+	Scheme    string `json:"-"`
 }
diff --git a/src/app/spreed-webrtc-server/main.go b/src/app/spreed-webrtc-server/main.go
@@ -117,15 +117,20 @@ func makeImageHandler(hub *Hub, expires time.Duration) http.HandlerFunc {
 
 func handleRoomView(room string, w http.ResponseWriter, r *http.Request) {
 
+	var err error
+
 	w.Header().Set("Content-Type", "text/html; charset=UTF-8")
 	w.Header().Set("Expires", "-1")
 	w.Header().Set("Cache-Control", "private, max-age=0")
 
+	scheme := "http"
+
 	// Detect if the request was made with SSL.
 	ssl := r.TLS != nil
 	proto, ok := r.Header["X-Forwarded-Proto"]
 	if ok {
 		ssl = proto[0] == "https"
+		scheme = "https"
 	}
 
 	// Get languages from request.
@@ -134,11 +139,22 @@ func handleRoomView(room string, w http.ResponseWriter, r *http.Request) {
 		langs = append(langs, "en")
 	}
 
-	// Prepare context to deliver to Javascript.
-	context := &Context{Cfg: config, App: "main", Host: r.Host, Ssl: ssl, Languages: langs}
+	// Prepare context to deliver to HTML..
+	context := &Context{Cfg: config, App: "main", Host: r.Host, Scheme: scheme, Ssl: ssl, Languages: langs, Room: room}
+
+	// Get URL parameters.
+	r.ParseForm()
+
+	// Check if incoming request is a crawler which supports AJAX crawling.
+	// See https://developers.google.com/webmasters/ajax-crawling/docs/getting-started for details.
+	if _, ok := r.Form["_escaped_fragment_"]; ok {
+		// Render crawlerPage template..
+		err = templates.ExecuteTemplate(w, "crawlerPage", &context)
+	} else {
+		// Render mainPage template.
+		err = templates.ExecuteTemplate(w, "mainPage", &context)
+	}
 
-	// Render the template.
-	err := templates.ExecuteTemplate(w, "mainPage", &context)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 	}
diff --git a/static/img/opengraph-image.png b/static/img/opengraph-image.png

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,5 @@`
`1`	`1`	`<%define "head"%><title><%.Cfg.Title%></title>`
	`2`	`+<meta name="fragment" content="!">`
`2`	`3`	`<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no">`
`3`	`4`	`<meta name="apple-mobile-web-app-capable" content="yes">`
`4`	`5`	`<meta name="mobile-web-app-capable" content="yes">`
Original file line number	Diff line number	Diff line change
`@@ -27,4 +27,6 @@ type Context struct {`
`27`	`27`	`Host string`
`28`	`28`	`Ssl bool`
`29`	`29`	`Languages []string`
	`30`	+ Room string `json:"-"`
	`31`	+ Scheme string `json:"-"`
`30`	`32`	`}`