write() getting called before writeHead() on gzip'd content causes failures

[kaysond]

It seems like harmon depends on the assumption that writeHead() gets called before write()

For whatever reason, there are situations where res.writeHead() doesn't get called until after one (or all!) res.write() calls.

So if the content is gzipped, then harmon doesn't set res.isGziped until after some of the data has already been written to the output, and either the gzip'd content gets sent to the output, or gzip fails because it gets only part of the data.

A possible solution would be to check content encoding on the first write() call, and store that.

[leveneg]

running into a similar issue, in which isHtml isn't getting set. It seems this change over at node-http-proxy has invalidated the assumption that writeHead always gets called first.

[leveneg]

opened #50 to address this issue