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Solr Update with PHP
14-Aug-2007
Solr
is a Lucene-based search engine server.
One of the primary ways that you add new documents
to Solr to be indexed is by sending an HTTP POST
request with an XML file containing information
about the new document
to http://yoursolrhost:yoursolrport/solr/update
The Apache Solr distribution provides a shell script
called post.sh that uses the Unix command-line version
of curl to post the XML files to the Solr server.
For my application, I needed more flexibility, and
wanted to do the POSTs using PHP.
The Problem
Add a new document to Solr for indexing by POSTing
the XML description file to the server using PHP.
The Solution
The following code (solr-post.php) illustrates how to send an
XML update file to Solr using PHP. This code is based
on code from the
SolPHP
package written by Brian Lucas.
I ran into a few problems adapting the sendUpdate function
in the
SolrUpdate (version 0.200)
class of SolPHP to work in my environment.
The main problem appears to have been that the POST request
needed to specify a different Content-type than the default
used by PHP's curl. Thus, my adaptation is very similar to
the sendUpdate function, but with a few changes.
<?php
## file: solr-post.php
## usage: php solr-post.php -f foo.xml
## where foo.xml contains instructions to add
## a document to the Solr index
## see: http://lucene.apache.org/solr/tutorial.html#Indexing+Data
$options = getopt("f:");
$infile = $options['f'];
$url = "http://yoursolrserver:yoursolrport/yoursolrhome/update";
$post_string = file_get_contents($infile);
$header = array("Content-type:text/xml; charset=utf-8");
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_string);
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLINFO_HEADER_OUT, 1);
$data = curl_exec($ch);
if (curl_errno($ch)) {
print "curl_error:" . curl_error($ch);
} else {
curl_close($ch);
print "curl exited okay\n";
echo "Data returned...\n";
echo "------------------------------------\n";
echo $data;
echo "------------------------------------\n";
}
?>
Links/References
-
SolPHP
package and the function
SolrUpdate (version 0.200)
by both written by Brian Lucas
-
Apache mailing list
SolrUpdate posting
-
xml.com article
with information about how to update documents
for indexing in Solr
-
SolrTomcat
-
PHP curl
, specifically the
curl_setopt
function
-
Information about
cURL
, which provides a way to do
HTTP POSTs from the command-line
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