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blue chen
February 27, 2014
Technology
12
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SPA SEO
at Happy designer meetup 2014.02.27
blue chen
February 27, 2014
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Transcript
I am Blue Web engineer @ YouMeb
⽤用nginx 1. SEO基礎 本⽇日⼤大綱 2. How to make SPA app
SEO friendly 3. 如何⾃自動化部屬SEO內容? 4. 溫馨⼩小提醒
SEO 基礎
Web Crawler
講到蜘蛛...我就想到.... 三級的天擎坦克被它摧毀了T.T 蜘蛛好像很厲害?
! SEO crawler 並⾮非很聰明
<html> <head> <title>這是title</title> </head> <body> <h1>Hello World!</h1> </body> </html> <html>
<head> <title>{{ title }}</title> </head> <body> <script> //do some ajax awesome thing.. </script> </body> </html> 靜態網⾴頁(無ajax) 靜態網⾴頁(有ajax)
So…要如何告訴這些 Crawler 你的網站是⽀支持AJAX呢?
www.example.com/ajax.html#mystate 網址有兩種 ! www.example.com/mystate 無hash: 有hash: 如何告訴這些 Crawler 你的網站是⽀支持AJAX呢? www.example.com/#/mystate
www.example.com/ajax.html#mystate 從網址下⼿手(有hash) 1. www.example.com/ajax.html#!mystate
www.example.com/ajax.html#!mystate 當 Crawler 收到要爬這段網址內容時 www.example.com/ajax.html?_escaped_fragment_=mystate 會對你的server發⼊入下列request (以google crawler 為例)
www.example.com/ajax.html?_escaped_fragment_=mystate 你的server接受到這樣的訊息時 回傳 crawler 對應的 SEO Data page/內容 (以google crawler
為例)
從網址下⼿手(無hash) 2. <meta name=”fragment” content=”!”> 請在<head>加⼊入: www.example.com?_escaped_fragment_=mystate (以google crawler 為例)
AngularJS解法 3. 有hash: 無hash: <meta name=”fragment” content=”!”>
! ⽩白話理解 crawler 對server請求流程
None
google/facebook crawler your app server www.example.com/mypage#!home 會發出⼀一段特殊的請求網址 回傳 SEO data
rendering page
Make SPA app SEO friendly
多數的語⾔言 framework 框架 SPA SEO 解決⽅方案
<html> <head> <title><%= title %></title> </head> <body> <h1>Hello World!</h1> </body>
</html> 當餵給crawler前,SEO Data 被先在server端印好輸出 Nodejs EJS <html> <head> <title>hello</title> </head> <body> <h1>Hello World!</h1> </body> </html> Nodejs 印出這些變數 crawler res.render({title:’hello’});
每個使⽤用者進來都會先經過SEO data Output 缺點 浪費資源
加上...如果前端的⾴頁⾯面只是靜態檔案怎辦? (像是yeoman產⽣生的app)
還是要有⼀一個東⻄西去處理餵給crawler SEO data 2. 架⼀一個nodejs server 處理(網址複雜) 1. 直接nginx指向(網址簡單) 3.
nodejs+nginx
直接nginx處理 但網址複雜很⿇麻煩
⼀一台 nodejs server 直接來
nginx + nodejs nginx 過濾來⾃自crawler 還是 user ? nodeJS 處理rending
page
nginx 靜態⾴頁⾯面路徑 SEO server ⼀一般使⽤用者 crawler nodejs server 處理 SEO
data render
Nginx設定 你的處理SEO data render Nodejs server位置 因為各家的crawler發出請求格式不⼀一 最好⽅方式是⽤用user agent在經過nginx時過濾
live demo
如何⾃自動化部屬SEO內容
⽤用nginx facebook . google friendly SEO data內容 image, title,url, description,og系列
! 那網站內容呢?
html-snapshots 1. use phantomJS 2. ⽀支援輸出 sitemap.xml, robots.txt,
arbitrary input 3. 有grunt版本
$ npm install grunt-html-snapshot
None
網站圖⽚片截圖:https://github.com/clkao/prerender-opengraph-image
live demo
溫馨⼩小提醒
⽤用nginx 知此知彼 https://support.google.com/webmasters/answer/164734?hl=zh-Hant 了解 SEO也要了解 search engine policy
End.