Error while logging grinder

Question

I am testing my webapp using grinder. I generated script using tcp proxy. It worked fine, but when I add logger to it, following error is produced:

Error running worker process
    net.grinder.scriptengine.jython.JaythonScriptExceutionException: 
    SyntaxError ('invalid syntax', ('c:\\........ \\script_name.py', 79, 9,
     "\tlog('Arvind Purohit')"))
    (no code object) at line 0

This is my script:

# The Grinder 3.9.1
# HTTP script recorded by TCPProxy at 9 Jul, 2012 3:08:10 PM

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
log = grinder.logger.info
connectionDefaults = HTTPPluginControl.getConnectionDefaults()
httpUtilities = HTTPPluginControl.getHTTPUtilities()

# To use a proxy server, uncomment the next line and set the host and port.
# connectionDefaults.setProxyServer("localhost", 8001)

# These definitions at the top level of the file are evaluated once,
# when the worker process is started.

connectionDefaults.defaultHeaders = \
  [ NVPair('Accept-Encoding', 'gzip, deflate'),
    NVPair('User-Agent', 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)'), ]

headers0= \
  [ NVPair('Accept', '*/*'),
    NVPair('Referer', 'http://192.168.1.53:8081/JSP-LOGIN/login.jsp'),
    NVPair('Accept-Language', 'en-IN'), ]

headers1= \
  [ NVPair('Accept', 'image/jpeg, application/x-ms-application, image/gif, application/xaml+xml, image/pjpeg, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*'),
    NVPair('Referer', 'http://192.168.1.53:8081/JSP-LOGIN/login.jsp'),
    NVPair('Accept-Language', 'en-IN'), ]

headers2= \
  [ NVPair('Accept', 'image/jpeg, application/x-ms-application, image/gif, application/xaml+xml, image/pjpeg, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*'),
    NVPair('Referer', 'http://192.168.1.53:8081/JSP-LOGIN/welcome.jsp'),
    NVPair('Accept-Language', 'en-IN'), ]

url0 = 'http://192.168.1.53:8081'

# Create an HTTPRequest for each request, then replace the
# reference to the HTTPRequest with an instrumented version.
# You can access the unadorned instance using request101.__target__.
# ========= START -================
request101 = HTTPRequest(url=url0)
request101 = Test(101, 'GET login.jsp').wrap(request101)

request102 = HTTPRequest(url=url0, headers=headers0)
request102 = Test(102, 'GET valid.js').wrap(request102)

request103 = HTTPRequest(url=url0)
request103 = Test(103, 'GET favicon.ico').wrap(request103)

# ====== login=============
request201 = HTTPRequest(url=url0, headers=headers1)
request201 = Test(201, 'POST loginmid.jsp').wrap(request201)

request202 = HTTPRequest(url=url0, headers=headers1)
request202 = Test(202, 'GET welcome.jsp').wrap(request202)

# ==========LOGOUT============
request301 = HTTPRequest(url=url0, headers=headers2)
request301 = Test(301, 'GET logout.jsp').wrap(request301)

request302 = HTTPRequest(url=url0, headers=headers2)
request302 = Test(302, 'GET login.jsp').wrap(request302)

request303 = HTTPRequest(url=url0, headers=headers0)
request303 = Test(303, 'GET valid.js').wrap(request303)


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

  # A method for each recorded page.
  def page1(self):
    """GET login.jsp (requests 101-103)."""
    result = request101.GET('/JSP-LOGIN/login.jsp', None,
      ( NVPair('Accept', 'image/jpeg, application/x-ms-application, image/gif, application/xaml+xml, image/pjpeg, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*'),
        NVPair('Accept-Language', 'en-IN'), ))
    log('ARVIND PUROHIT')
    grinder.sleep(13)
    request102.GET('/JSP-LOGIN/valid.js')

    grinder.sleep(62)
    request103.GET('/favicon.ico', None,
      ( NVPair('Accept', '*/*'), ))

    return result

  def page2(self):
    """POST loginmid.jsp (requests 201-202)."""

    # Expecting 302 'Moved Temporarily'
    result = request201.POST('/JSP-LOGIN/loginmid.jsp',
      ( NVPair('userName', 'A'),
        NVPair('password', 'A'),
        NVPair('Submit', 'Login'), ),
      ( NVPair('Content-Type', 'application/x-www-form-urlencoded'), ))

    grinder.sleep(15)
    request202.GET('/JSP-LOGIN/welcome.jsp')
    self.token_flag = \
      httpUtilities.valueFromBodyURI('flag') # 'edit'

    return result

  def page3(self):
    """GET logout.jsp (requests 301-303)."""

    # Expecting 302 'Moved Temporarily'
    result = request301.GET('/JSP-LOGIN/logout.jsp')

    request302.GET('/JSP-LOGIN/login.jsp')

    request303.GET('/JSP-LOGIN/valid.js', None,
      ( NVPair('If-Modified-Since', 'Tue, 03 Jul 2012 10:18:40 GMT'),
        NVPair('If-None-Match', 'W/\"4436-1341310720000\"'), ))

    return result

  def __call__(self):
    """Called for every run performed by the worker thread."""
    self.page1()      # GET login.jsp (requests 101-103)

    grinder.sleep(12893)
    self.page2()      # POST loginmid.jsp (requests 201-202)

    grinder.sleep(16403)
    self.page3()      # GET logout.jsp (requests 301-303)

def instrumentMethod(test, method_name, c=TestRunner):
  """Instrument a method with the given Test."""
  unadorned = getattr(c, method_name)
  import new
  method = new.instancemethod(test.wrap(unadorned), None, c)
  setattr(c, method_name, method)

# Replace each method with an instrumented version.
# You can call the unadorned method using self.page1.__target__().
instrumentMethod(Test(100, 'Page 1'), 'page1')
instrumentMethod(Test(200, 'Page 2'), 'page2')
instrumentMethod(Test(300, 'Page 3'), 'page3')

Answer 1

I'm just learning Python (less than a week), but I think it may be an issue with the \t.

Python is reading this:

\tlog('Arvind Purohit')

But, instead of a tab, it's expecting 4 spaces, like this:

    log('Arvind Purohit')

That's why it must be working when you copy/paste it. Make sure you're using an editor that shows all characters to avoid this and indentation with vertical lines so you can also avoid "(no code object) at line 0" errors.