Setting different meta title,description per social network

The only way to get different title,meta responses per social media channel is to have the response set on the backend, in this case when Facebook, Pinterest and Google Plus hit the page check the user agent and display the relevant info, Twitter you can still force the text/image that’s shown, the rest rely on the open graph tags or whatever the title/description is set to. From my experience it’s impossible to set this via plugins like addthis etc.. although it may be possible through some of the API’s it’s easier to check the user agent though.

jstl example

<c:choose>
<c:when test="${fn:contains(header['User-Agent'],'Facebot') || fn:contains(header['User-Agent'],'facebookexternalhit/1.1') || fn:contains(header['User-Agent'],'facebookexternalhit/1.0')}">
<c:if test="${not empty facebookTitle}">
<c:set var="ogTitle" value="${facebookTitle}" />
</c:if>
<c:if test="${not empty facebookDesc}">
<c:set var="ogDescription" value="${facebookDesc}" />
</c:if>
<c:if test="${not empty facebookImage}">
<c:set var="ogImage" value="${facebookImage}" />
</c:if>
</c:when>
<c:when test="${fn:contains(header['User-Agent'],'pinterest/0.1 +http://pinterest.com/')}">
<c:if test="${not empty pinterestTitle}">
<c:set var="ogTitle" value="${pinterestTitle}" />
</c:if>
<c:if test="${not empty pinterestDescription}">
<c:set var="ogDescription" value="${pinterestDescription}" />
</c:if>
<c:if test="${not empty pinterestImage}">
<c:set var="ogImage" value="${pinterestImage}" />
</c:if>
</c:when>
<c:when test="${fn:contains(header['User-Agent'],'Google (+https://developers.google.com/+/web/snippet/)')}">
<c:if test="${not empty gplusTitle}">
<c:set var="ogTitle" value="${gplusTitle}" />
</c:if>
<c:if test="${not empty gplusDesc}">
<c:set var="ogDescription" value="${gplusDesc}" />
</c:if>
<c:if test="${not empty gplusImage}">
<c:set var="ogImage" value="${gplusImage}" />
</c:if>
</c:when>
<c:otherwise>
<!-- use default title value -->
</c:otherwise>
</c:choose>

PHP example

function get_meta()
{
switch (true) {
case stristr($_SERVER['HTTP_USER_AGENT'], 'Facebot') || stristr($_SERVER['HTTP_USER_AGENT'],'facebookexternalhit'):
$title = 'Facebook Title';
$description = 'Facebook Description';
break;
case stristr($_SERVER['HTTP_USER_AGENT'], 'developers.google.com'):
$title = 'Google Title';
$description = 'Google Description';
break;
case stristr($_SERVER['HTTP_USER_AGENT'], 'pinterest'):
$title = 'Pinterest Title';
$description = 'Pinterest Description';
break;
default:
$title = 'Default title';
$description = 'Default Description';
}
}

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