A search component for Solr to sanitize request parameter input

The component is installed using Solr's package manager:

1. Start Solr with package manager enabled

   # You need to set Java property 'enable.packages=true', e.g.
   bin/solr -c -Denable.packages=true
   

2. Install this plugin repository into your Solr cluster

   bin/solr package add-repo cominvent https://raw.githubusercontent.com/cominvent/solr-plugins/master
   

3. Install the package

   # First confirm that the package is in the list
   bin/solr package list-available
   # Install and deploy the plugin
   bin/solr package install request-sanitizer
   # Deploy the package to your collection(s)
   bin/solr package deploy request-sanitizer -y -collections mycoll  
   

After install and deploy, the component is installed and ready to use. What remains is to configure your Request Handler(s). In solrconfig.xml:

1. Add the component as first-component to your /select handler:

   <arr name="first-components">
     <str>request-sanitizer</str>
   </arr>
   

2. Define sanitizing rules in defaults section of /select handler: These are examples of rules you can apply:

   <str name="sanitize">rows=>100:100</str>
   <str name="sanitize">offset=>10000:10000</str>
   

Always override the field, just like invariant

sanitize=rows=25 or sanitize=rows=invariant:25

Map values to other values (if no match found, will use input value):

sanitize=echoParams=alle:all eksplisitt:explicit

Set default value if param is not set

sanitize=debugQuery=default:true

Restrict numeric value to a max limit (if >100 then cap at 100)

sanitize=rows=>100:100

Multiple replacements through multiple http params

sanitize=rows=>100:100&sanitize=offset=>10000:10000

Build with maven:

mvn package

Copy the jar to a place where Solr can find it:

SOLR_HOME=/path/to/solr/home
mkdir $SOLR_HOME/lib
cp target/request-sanitizer-*.jar $SOLR_HOME/lib/

The component is licensed under the Apache License, so you can use it freely for anything :)

I hope to extend the component with other useful sanitizing features, see issue tracker.

Pull Requests welcome!

This is an alaternative way to install, if you don't want to use package manager:

Download a pre-built jar from releases section. and drop it in your $SOLR_HOME/lib/

Then define the component in solrconfig.xml:

<searchComponent name="request-sanitizer" class="com.cominvent.solr.RequestSanitizerComponent"/>

Now you can configure the component as above