This is a C library for handling proxy autoconfiguration files. You can also use it to test your PAC files.

Libpac is non-blocking and was created with non-blocking, event-based applications in mind. Since several PAC javascript functions might block, it uses a threadpool to execute your PAC javascript code. You supply a notification function to pac_init, and it will be called when a worker thread finished executing your PAC code. You can then schedule an event for your main event loop with the result.

$ ./configure
$ make
$ make check

See tests/test_pac.c for an example on how to use libpac.

You can use tests/test_pac to test your PAC file. It takes the path for your PAC file as its first parameter, then an URL and a hostname. E.g.:

$ ./tests/test_pac ~/pac.js http://mysite.com mysite.com
Found proxy PROXY 4.5.6.7:8080; PROXY 7.8.9.10:8080

PAC files can return one or more proxies, or "DIRECT" for a direct connection.

You can also call test_pac with multiple URL/hostname pairs:

$ ./tests/test_pac ~/pac.js http://mysite.com mysite.com http://mysite.net mysite.net
Found proxy PROXY 4.5.6.7:8080
Found proxy PROXY 7.8.9.10:8080