Libpac

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.

Build

You need autoconf and automake. For the first time, you need to generate configure:

$ autoreconf -i

Then build libpac:

$ ./configure
$ make

To run tests:

$ make check

Note: with old versions, you needed --enable-deep-c-stack for the javascript engine be able to handle deeply recursive stacks (large PAC files with complex checks might require this).

Example

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

Testing your PAC file

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