Quick update on Selenium in Twisted Server mode

Several people experienced problems when trying to follow my "Selenium and Twisted" tutorial. Here are some issues and some workarounds:

1) If you are on a Windows XP machine and, when trying to run google-test-xmlrpc.py, all you see in the SeleniumRunner page in the browser is:

CGI Script Error
Premature end of script headers

then you need to recompile nph-proxy.cgi into nph-proxy.exe by using the PAR utility. Marc Tremblay reported success by using PAR version 0.87 from here.

2) If you are on a Unix-like machine (Linux, Mac OS X, FreeBSD), then you need to modify selenium_server.py to have it use nph-proxy.cgi instead of nph-proxy.exe.

You also need to run "dos2unix" on nph-proxy.cgi in order to convert from DOS line feeds to Unix line feeds.

3) The Twisted-based server doesn't seem to work properly on Windows 2000 Pro machines. Assuming selenium_server.py is running in one command prompt window, then running the google-test-xmlrpc.py script in another window produces this output:

ERROR: Result queue was empty
ERROR: Result queue was empty
ERROR: Result queue was empty
ERROR: Result queue was empty
ERROR: Result queue was empty
ERROR: Result queue was empty
ERROR: Result queue was empty
test complete

I'm not sure what causes this. I suspect the nph-proxy.cgi script is the culprit, but recompiling it into nph-proxy.exe did not solve the problem for me.