* Introducing the module CGI, re-exporting a subset of the cgi package. It
might complete replace the cgi package in the future.
* Introducing the module CGIUtils, containing functions from FastCGIUtils that
have nothing to do with fastcgi.
Some low level hackery with unsafePerformIO and global variables was left
in FastCGIUtils, but it is actually not used, neither for gf -server nor
exec/pgf-fcgi.hs.
By adding a header
Access-Control-Allow-Origin: *
to the HTTP responses, web browsers are informed that it is OK to call the
services from web pages hosted on other sites.
This is apparently supported in most modern browsers, so it should no longer
be necessary to resort to JSONP.
See https://developer.mozilla.org/en-US/docs/HTTP/Access_control_CORS
This makes it possible to download PGF files from servers where the PGF service
is installed.
I am also considering making commmand=download the default instead of
command=grammar.
The dependency on the fastcgi package made pgf-server difficult to compile, so
it is now split into
- pgf-fgci (main module in pgf-fcgi.hs), which is built only if fastcgi is
already installed or if you turn on the fastcgi flag (e.g. by doing
'cabal install -f fastcgi').
- pgf-http (main module in pgf-http.hs) which is always built (and hopefully
has no problematic dependencies.)
The modules FastCGIUtils and PGFService no longer depend on fastcgi.
