How to Test REST Web Service Using The Grinder

A simple and easy method of load testing a REST service using The Grinder open source load testing tool is as follows:

• use the HttpRequest object
• use the appropriate REST method on the HttpRequest object: 
• Method=PUT
• Method=GET
• Method=DELETE

The following script gives an example of this method in the case of REST PUT request using a JSON request message.  (XML request message would be similar).

Script

# The Grinder 3.7.1

from net.grinder.script import Test

from net.grinder.script.Grinder import grinder

from net.grinder.plugin.http import HTTPPluginControl, HTTPRequest

from HTTPClient import NVPair

connectionDefaults = HTTPPluginControl.getConnectionDefaults()

httpUtilities = HTTPPluginControl.getHTTPUtilities()

# headers

headers0= \

  [ ]

# Http URL

url0 = 'http://servername:8080'

# Create an HTTPRequest for each request, then replace the

request101 = HTTPRequest(url=url0, headers=headers0)

request101 = Test(101, 'PUT Test').wrap(request101)

request102 = Test(102, 'PUT Test 2').wrap(request101)

json1 = '''{

              \"key1\"        :  \"BD6632F8569D4D609BB8ED902E9F6585\",    

              \"key2\"        :  \"65EE35B00655100625F85498A6092F80\",    

              \"key3\"        :  \"984921672\",\r\n    

              \"id1\"         :  \"6\",\r\n    

              \"id2\"         :  \"1\",\r\n    

              \"descr\"       :  \"4724711\",\r\n    

        }'''

json2 = '''{   

              \"key4\"        :  \"6\",\r\n    

              \"key5\"        :  \"1\",\r\n    

              \"key6\"        :  \"0\",\r\n    

              \"key7\"        :  \"2\",\r\n    

              \"name1\"       :  \"Green Bay\",\r\n    

              \"name2\"    :  \"GRBay\",\r\n    

        }'''

class TestRunner:

  """A TestRunner instance is created for each worker thread."""

  # A method for each recorded page.

  def page1(self):

    """PUT Test (request 101)."""

    result = request101.PUT('/Capture/Test', json1,   ( NVPair('Content-Type', 'application/json'), ))

    return result

# A method for each recorded page.

  def page2(self):

    """PUT Test (request 101)."""

    result = request102.PUT('/Capture/Test', json2,   ( NVPair('Content-Type', 'application/json'), ))

    return result

  def __call__(self):

    """Called for every run performed by the worker thread."""

    self.page1()      # PUT Test (request 101)

    self.page2()      # PUT Test (request 102)

Output