Feeds protocol implementation and search integration
Project description
Overview
Plone integration for Google Search Appliance.
Compatible with Plone 4.
Installation
Use Plone’s setup tool to install the profile: “Integration to Google Search Appliance”.
Then visit the control panel to configure your appliance. Also in the control panel are various settings to customize the site integration.
Why?
This package exists to provide a light-weight integration between Plone and a Google Search Appliance service. Its philosophy is to let the appliance do the heavy lifting instead of Plone. The “64” postfix corresponds to the version of the search appliance software at the time of writing: 6.4.
There’s an alternative in Matous Hora’s collective.gsa package which takes a different approach and is in return a much more complex piece of software. The package also integrates more closely with Plone by patching into the default portal catalog.
The present package – collective.gsa64 – is about site search and just that.
Feed protocol implementation
The package comes with an implementation for the Feed Protocol API. When a content item for which search is enabled (use Plone’s search control panel to configure) is created, modified or deleted, a feed is sent to the search appliance to update the status.
There are two modes of operation: web (implicitly enabled for a feed with the name "web") and url and metadata mode (any other name).
The metadata for the second mode is drawn directly from HTML using the plone.htmlhead content provider. As such this corresponds directly to the metadata which would be indexed using crawling.
You can enable include the standard Dublin Core metadata using the site control panel.
An example of a viewlet definition in ZCML that renders additional metadata:
<browser:viewlet
name="my-metadata-viewlet"
for=".content.ISomeContentType"
manager="plone.app.layout.viewlets.interfaces.IHtmlHead"
template="my_metadata_viewlet.pt"
permission="zope2.View"
/>
Note that feed requests are issued after the browser request has ended and will not delay server response.
Search view
The setup script adds a Python Script object to the portal root with the id "search". This takes over the normal skin lookup and redirects the traversal to the @@gsa-search view.
You can enable or disable the search appliance results view (and operation in general) using the control panel.
The results view is by default generated using an included browser view with a template that generates markup similar to Plone’s own search results view. However, it’s also possible to have an XSLT transform applied directly to the XML result document and show this instead.
For custom projects, it may be necessary to subclass the default search view implementation. Here’s an example of a modified query:
from collective.gsa64.browser import search
class SearchView(search.SearchView):
def build_query(self):
query = super(SearchView, self).build_query()
# always include hits for "plone"
query['q'] = '(%s) OR plone' % query['q']
return query
It may be desirable to change the display of the individual search results. You can accomplish this by providing your own search templates and fill out the "result" METAL slot:
class SearchView(search.SearchView):
template = ViewPageTemplateFile("templates/search.pt")
@property
def master_search_template(self):
return super(SearchView, self).template
The templates/search.pt template:
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"
xmlns:tal="http://xml.zope.org/namespaces/tal"
xmlns:metal="http://xml.zope.org/namespaces/metal"
xmlns:i18n="http://xml.zope.org/namespaces/i18n"
lang="en"
metal:use-macro="view/master_search_template/macros/master">
<metal:result fill-slot="result">
<h4 tal:content="structure result/heading" />
</metal:result>
</html>
Each result object contains the following keys:
description: HTML document description
heading: HTML document title
url: Document’s display URL
creator: DC creator value
normalized_content_type: Normalized Plone content type id
metadata: Dictionary that maps metadata keys to values
Content types filter
Plone’s standard types not searched setting is applied to HTML output via a browser viewlet "meta-robots" which renders a noarchive meta tag for content types excluded from search.
Credits
This package was designed and developed by the following authors.
Malthe Borch
Mustapha Benali
Development was funded by Headnet.
History
1.0-beta1 (2010-12-17)
Initial public release.
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