blocks|key|316214|text|我猜只有静态链接才会为facebook上的帖子生成一个缩略图。您尝试使用的链接不是静态链接。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|316215|这是Facebook在尝试生成缩略图时得到的结果。|316216|<Error>
<SCRIPT/>
<Code>AccessDenied</Code>
<Message>Access+Denied</Message>
<RequestId>D577337ADC9FA36A</RequestId>
<HostId>
DN9BnBduVLgHbf2lONA%2Be/fXQIOuT7W3WOFUPdthdpP2MZQhSLlolTvyJ0t9eZXn
</HostId>
</Error>|code-block|syntax|javascript|316217|解决方案:|316218|事实证明，要使其工作，您不能只是将任意子域映射到任意存储桶。完全限定的子域名必须与S3存储桶名称一致。|316219|316220|假设你的站点的名称是static.mydomain.com。然后，您需要使用相同的名称创建一个名为static.mydomain.com.|ordered-list-item|316221|Once的静态存储桶。如果您将该存储桶配置为S3静态网站，则会为其分配一个类似于S3的URL域主机，并将您的子域映射到步骤2中的URL。在enom.com中，这意味着将主机"+static“映射到地址"static.mydomain.com.s3-website-us-east-1.amazonaws.com”作为CNAME记录。|CODE|316222|316223|，+it将帮助您从您的S3帐户托管一个静态站点。使用该自定义域URL路径中的图像。这会起作用的。|316224|entityMap^0|4|Q|0|0|0|0|5|0|0|0|0|2T|1I|4E|5|0|0|0|1|0^^$0|@$1|2|3|4|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|15|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|16|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|17|8|@$9|18|A|19|B|C]]|D|@]|E|$]]|$1|O|3|P|5|6|7|1A|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|1B|8|@]|D|@]|E|$]]|$1|R|3|S|5|T|7|1C|8|@]|D|@]|E|$]]|$1|U|3|V|5|T|7|1D|8|@$9|1E|A|1F|B|W]|$9|1G|A|1H|B|W]]|D|@]|E|$]]|$1|X|3|-4|5|6|7|1I|8|@]|D|@]|E|$]]|$1|Y|3|Z|5|6|7|1J|8|@$9|1K|A|1L|B|C]]|D|@]|E|$]]|$1|10|3|-4|5|6|7|1M|8|@]|D|@]|E|$]]]|11|$]]

My guess is only static links will generate a thumbnail for posts on facebook. The link you are trying to use not a static one. 

This is what Facebook gets when trying to generate a thumbnail.

<pre><code>&lt;Error&gt;
&lt;SCRIPT/&gt;
&lt;Code&gt;AccessDenied&lt;/Code&gt;
&lt;Message&gt;Access Denied&lt;/Message&gt;
&lt;RequestId&gt;D577337ADC9FA36A&lt;/RequestId&gt;
&lt;HostId&gt;
DN9BnBduVLgHbf2lONA+e/fXQIOuT7W3WOFUPdthdpP2MZQhSLlolTvyJ0t9eZXn
&lt;/HostId&gt;
&lt;/Error&gt;
</code></pre>

Solution : 

It turns out that to make it work, you cannot just map any arbitrary subdomain to any arbitrary bucket. The fully qualified subdomain name must be the same as the S3 bucket name.

<ol>
<li>Suppose the name of your site is static.mydomain.com. Then you need
to create a S3 bucket with that same name, named
static.mydomain.com.</li>
<li>Once you configure that bucket as a S3 static web site, it will have
a URL assigned to it that looks something like <code>http://static.mydomain.com.s3-website-us-east-1.amazonaws.com</code>.</li>
<li>Go to your domain host and map your subdomain to the URL from step 2. In enom.com, that meant mapping the host "static" to the address "<code>static.mydomain.com.s3-website-us-east-1.amazonaws.com</code>" as a <code>CNAME</code>
record.</li>
</ol>

<a href="https://stackoverflow.com/questions/5043616/amazon-s3-static-web-sites-custom-domain-or-subdomain">Source</a>, it will help you host a static site from your S3 account. Use images from that custom domain URL path. That will work.

blocks|key|1105622|text|关键是图像的大小。不要问我魔术数字是多少，但大图可以用，小图不能用，可能是它必须大于facebook使用的预览尺寸。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1105623|在我的测试中，我关闭了静态网站配置。|1105624|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

The key is image size. Don't ask me what the magic number is, but larger images work and smaller ones don't. It could be that it has to be larger than the preview size that facebook uses.

In my test, I had static website configuration turned off.

Need a way for Facebook to render an image in wall posts. Sometimes, all you need to do is copy and paste the link to the image, like here:<img src="https://i.stack.imgur.com/xZcpZ.png" alt="Working rendered image in Facebook wall post">

But, with the images I need to link to, which are on S3, I get this:<img src="https://i.stack.imgur.com/ZMmO6.png" alt="Image link not being rendered in Facebook wall post">

You can click <a href="https://s3.amazonaws.com/dotellapptest/review_photos/thumbnails/811..OJUzXI76Rw6J2Zj_vZyWNw.png" rel="nofollow noreferrer">here</a> to verify that the second link is in fact a valid image address (you should see a creepy hand drawn smiley face).

I did this test just using the normal Facebook GUI on the site, but I will be using the answer to this question in my app, which integrates with Facebook via the Open Graph API. (In case anyone thought this question was not programming related).

Anyone know what I need to do to get the second image to render in the post?

Facebook won't render link image on wall post

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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需要一种方法，为Facebook在墙上的帖子渲染图像。有时，您需要做的就是复制并粘贴图像的链接，如下所示：​但是，对于我需要链接到的S3上的图像，我得到了这样的结果：​您可以单击来验证第二个链接实际上是一个有效的图像地址(您应该会看到一个令人毛骨悚然的手绘笑脸)。我只是在网站上使用普通的Facebook GUI进行了这...

问Facebook不会在墙上贴出链接图片
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