Lab #6 - Web services access using SOAP

CS 183 - Hypermedia and the Web

For this final lab assignment for the class you will be using a SOAP API in PHP to access an Internet accessible SOAP service. The service that you will contact is the Google SOAP service.

Your task is to write a PHP script that will receive input from this html page containing a simple form that requires the user to input the keywords to be searched at Google.Then your PHP script uses the input data to contact the service for retrieve the first URL in the Google search results via the SOAP API. The script should then return an HTML page containing the result from the service in some clearly readable format. For example, if a user inputs 'Jim Whitehead' in the input form and submits it to your PHP script, your PHP script should retrieve the URL 'http://www.cse.ucsc.edu/~ejw/' from the SOAP service and returns an HTML page containing this URL.

To perform this lab assignment, you will need to do the following:

• Copy the following:
  /afs/cats.ucsc.edu/users/k/kpan/cmps183/nusoap.php
  
  to your working web directory for this assignment.
• At the top of your php script you need to include the following statement:

  include_once('nusoap.php');

• Here is an example of a php script that uses the NuSoap API to contact Amazon, retrieving XML results for some music products.
• In your PHP script, set the following parameter values to the parameter array for the request method.

  $parameters['key'] = 'wpnENNtQFHLDlDZT5CN9VO8as4U1DjB7';

  $parameters['q'] = The Keywords from the input form;

  $parameters['start'] = 0;

  $parameters['maxResults'] = 10;

  $parameters['filter'] = false;

  $parameters['restrict'] = '';

  $parameters['safeSearch'] = false;

  $parameters['lr'] = '';

  $parameters['ie'] = '';

  $parameters['oe'] = '';

• The URL to the WSDL is: http://api.google.com/GoogleSearch.wsdl
• Instead of using the statement, $result = $soap_proxy->KeywordSearchRequest($parameters);, to call the SOAP service as in the Amazon example, use the statement, $result = $soap_proxy->call("doGoogleSearch",$parameters);, to call the Googal SOAP service in your PHP script.
• You can get the first URL in the search results returned from the Google SOAP service using the expression: $result['resultElements'][0]['URL']

For submission please email pankai [at] cse [dot] ucsc [dot] edu your PHP script and a URL to the script on a working webserver such as your user directory on the people.ucsc.edu servers.

NOTE:

Last modified: 5/12/2005