jsgi-node

JSGI is not able to take advantage of node's ability to serve responses asynchronously because the spec doesn't allow for it. JSGI specifies that the return value of an app must be the [status, headers, body], whereas Strata specifies that the return value of an app is not important and that the app's callback should be used to serve the response instead. This is an API incompatibility that cannot be ignored. The most developed lib I've seen up to this point to get JSGI working on node (https://github.com/kriszyp/jsgi-node) isn't able to get asynchronous responses working properly. Instead, it just does a body.forEach (see https://github.com/kriszyp/jsgi-node/blob/master/lib/jsgi-no...) to write each piece out to the response synchronously. Copied and pasted from https://github.com/mjijackson/strata/issues/2.

There are also Fab.js http://github.com/jed/fab (which hasn't seen any updates in a while, but I'm sure it's still being worked on), Pintura http://github.com/kriszyp/pintura and Picard http://github.com/dantebronto/picard At a lower level of abstractions are the middleware layers Connect http://github.com/extjs/Connect and JSGI http://github.com/kriszyp/jsgi-node

For another middleware solution that's been around for more than a year, is modeled after Rack and WSGI, and follows the JSGI specification (which I believe is part of the CommonJS spec), be sure to check out tlrobinson's Jack - http://github.com/tlrobinson/jack . You can use Jack with Node by using node-jsgi (http://github.com/kriszyp/jsgi-node).

JSGI (the interface spec) and Jack (the port of Rack) already do this for multiple JavaScript platforms, including Node (via Kris Zyp's http://github.com/kriszyp/jsgi-node): http://jackjs.org/