I'm pleased to announce that we've just
released pactester, a tool to
test the proxy auto-configuration (PAC) files used by browsers to identify the correct proxy
server for a given URL. Since the PAC file evaluation mechanism is generated inside the
browser and cannot be accessed from outside, the only way to tell which proxy your browser
will use for a specific URL is manual inspection of the PAC file. Unfortunately, this approach
is error prone and quickly becomes impractical for large and complex PAC files. Enter
pactester, which resolves this issue by simulating browser behavior.
