Nin*_*nja 8 facebook codeigniter opengraph facebook-opengraph
我有我的页面的HTML结构,如下所示.我添加了所有元标记,但仍然无法从我的网站上抓取任何信息.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:fb="http://www.facebook.com/2008/fbml">
<head>
<meta http-equiv="Content-Type" content="text/html;" charset=utf-8"></meta>
<title>My Site</title>
<meta content="This is my title" property="og:title">
<meta content="This is my description" property="og:description">
<meta content="http://ia.media-imdb.com/images/rock.jpg" property="og:image">
<meta content="<MYPAGEID>" property="fb:page_id">
.......
</head>
<body>
.....
当我在facebook调试器(https://developers.facebook.com/tools/debug)中输入URL时,我收到以下消息:
Scrape Information
Response Code 404
Critical Errors That Must Be Fixed
Bad Response Code URL returned a bad HTTP response code.
Errors that must be fixed
Missing Required Property The 'og:url' property is required, but not present.
Missing Required Property The 'og:type' property is required, but not present.
Missing Required Property The 'og:title' property is required, but not present.
Open Graph Warnings That Should Be Fixed
Inferred Property The 'og:url' property should be explicitly provided, even if a value can be inferred from other tags.
Inferred Property The 'og:title' property should be explicitly provided, even if a value can be inferred from other tags.
为什么facebook没有阅读元标记信息？该页面是可访问的,不会隐藏在登录后面等.
UPDATE
好的,我做了一些调试,这就是我找到的.我在我的目录中设置了htaccess规则 - 我正在使用PHP Codeigniter框架并且有htaccess规则从url中删除index.php.
因此,当我将网址提供给没有index.php的facebook调试器(https://developers.facebook.com/tools/debug)时,facebook会显示404,但是当我使用index.php提供网址时,它能够解析我的页面.
现在,当url没有index.php时,如何让facebook抓取内容？
这是我的htaccess规则:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
#Removes access to the system folder by users.
#Additionally this will allow you to create a System.php controller,
#previously this would not have been possible.
#'system' can be replaced if you have renamed your system folder.
RewriteCond %{REQUEST_URI} ^system.*
RewriteRule ^(.*)$ /index.php?/$1 [L]
#When your application folder isn't in the system folder
#This snippet prevents user access to the application folder
#Submitted by: Fabdrol
#Rename 'application' to your applications folder name.
RewriteCond %{REQUEST_URI} ^application.*
RewriteRule ^(.*)$ /index.php?/$1 [L]
#Checks to see if the user is attempting to access a valid file,
#such as an image or css document, if this isn't true it sends the
#request to index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>
<IfModule !mod_rewrite.c>
# If we don't have mod_rewrite installed, all 404's
# can be sent to index.php, and everything works as normal.
# Submitted by: ElliotHaughin
ErrorDocument 404 /index.php
</IfModule>
Facebook文档包含有关开放图谱协议的详细信息以及如何包含正确的元标记,以便Facebook可以准确地抓取您的URL.
https://developers.facebook.com/docs/opengraphprotocol/
基本上你要做的是og:tags在你现有的元标记中包含一些特殊的(或者另外的).
<head>
<title>Ninja Site</title>
<meta property="og:title" content="The Ninja"/>
<meta property="og:type" content="movie"/>
<meta property="og:url" content="http://www.nin.ja"/>
<meta property="og:image" content="http://nin.ja/ninja.jpg"/>
<meta property="og:site_name" content="Ninja"/>
<meta property="fb:admins" content="USER_ID"/>
<meta property="og:description"
content="Superhuman or supernatural powers were often
associated with the ninja. Some legends include
flight, invisibility and shapeshifting..."/>
...
</head>
如果你有一个.htaccess文件重定向东西并且让Facebook难以刮掉你的URL,那么你可以通过检测Facebook的爬虫来获取.htaccess正确的标签.我相信Facebook抓取工具提供的用户代理是这样的:
facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php)
该文档还有一节讨论确保他们的抓取工具可以访问您的网站.
根据您的配置,您可以通过查看服务器access_log来测试这一点.在运行apache的UNIX系统上,访问日志位于/var/log/httpd/access_log.
所以你可以在.htaccess文件中使用类似的条目-
RewriteCond %{HTTP_USER_AGENT} ^facebookexternalhit
RewriteRule ^(.*)$ ogtags.php?$1 [L,QSA]
[L,QSA]我在那里放置的标志声明这是将在当前request()和(查询字符串附加)上强制执行的L ast规则,指出在重写URL时将传递给定的任何查询字符串.例如,一个URL,例如:LQSA
https://example.com/?id=foo&action=bar
将传递给ogtags.php这样 - ogtags.php?id=foo&action=bar.您的ogtags.php文件将根据传递的参数生成动态og:meta标记.
现在,只要您的.htaccess文件检测到Facebook用户代理,它就会传递给他ogtags.php文件(可以包含正确的og:元信息).请注意您在其中的任何其他规则.htaccess以及它们可能如何影响新规则.
从.htaccess您详细介绍的条目中,我建议将这个新的"Facebook规则"作为第一条规则.
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