Google Search Appliance Protocol Reference - Manual (Page 5)

Google Search Appliance: Search Protocol Reference 5
Chapter 1
Introduction
Chapter 1
The Google Search Appliance uses a simple HTTP-based protocol for serving search results. This enables
you to control how search results are requested and how they are presented to end users. This guide
describes the technical details of search requests and results. This guide assumes that you have a basic
understanding of the HTTP protocol and the HTML document format.
For terminology definitions, see the Google for Work Glossary.
The Google Search Appliance accepts search requests as input, and returns search results as output.
Search requests, the input, are simple HTTP requests to the Google Search Appliance. Search users
typically use HTML forms displayed in a web browser to make these requests, but other applications
can also send search requests by making appropriate HTTP requests. For information on the search
request format and options, see “Request Format” on page 6.
Search results, the output, are returned in either HTML or XML formats, as specified in the search
request.
HTML-formatted results can be displayed directly in a web browser. The search appliance generates
HTML results by applying an XSL stylesheet to the XML results. You can customize the appearance of the
HTML results by modifying this stylesheet. For more information, see “Custom HTML” on page 52.
XML-formatted output makes it possible to process the search results in web applications or other
environments. For information on the XML results format, see “XML Output” on page 53.
Note: In this guide, long URLs may appear as multiple lines for better readability. In a browser, all URLs
are continuous strings.