Need to send an Ajax request to a Solr server that’s on a different domain? You will, of course, need to use JSONP instead of an ordinary JSON request, due to JavaScript’s cross-domain security restrictions. To get a properly padded response from Solr, add the json.wrf parameter to your query string, giving it the name of your callback function. In jQuery:
jQuery.ajax({
url: mySolrUrl,
data: myQueryParameters,
success: mySuccessCallback,
dataType: 'jsonp',
jsonp: 'json.wrf'
});Of course, for this to work the Solr server you’re accessing needs to be publicly accessible, which probably isn’t ideal for security.
My previous post teaches you how to use jQuery and Ajax for the administration pages in your WordPress plugins. To use them in your user-facing pages requires a few changes.
We’ll use here a simlarly contrived example. Let’s say you use <!--more--> in your longer posts so they don’t fill up too much of your page. Normally, clicking the “Read more…” (or whatever text you use) link takes the user to a separate page with the complete post. In our example, rather than sending the reader to a new page, we’ll make an Ajax request to get the rest of the post and insert it directly into the current page. Continue reading “jQuery and Ajax in WordPress Plugins – Public Pages”
This is a quick overview of how to use jQuery and its Ajax functions in WordPress. To get the point across, I’ll use a simple and contrived example. We’ll have an admin screen with a list of categories. Clicking on the name of one of the categories will fetch a list of titles of posts in that category and display them as a sub-list of that category. Continue reading “jQuery and Ajax in WordPress Plugins – Administration Pages”
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