Investigate ms-stream for IE.

[jonnyreeves]

https://msdn.microsoft.com/en-us/library/hh772328(v=vs.85).aspx

[ariutta]

The requests (plural) library uses ms-stream. It even supports using ActiveX for old versions of IE. Could you start with that implementation?

[ariutta]

I've got a rough ms-stream implementation here in the ms-stream branch of my fork.

[ariutta]

I'll work on merging my ms-stream implementation into your latest feature code. (Actually, I'll wait until you can merge our latest work into master.) Any thoughts on the abstraction for streaming xhr? If I make a version to work with IE10+ and possible IE9, I don't know whether it's ideal to make another file named msXhr.js, because there will be quite a bit of code shared between xhr.js, mozXhr.js and msXhr.js. I could pull out the common code and only include it once. (We've decided to dedup the common code between XHR implementations.)

[ariutta]

This comment is relevant to the question of how to make an abstraction that works with the IE ms-stream readAsArrayBuffer method.

[jonnyreeves]

See https://github.com/jhiesey/stream-http/blob/master/lib/response.js#L157 - got a little disheartened when I first came across this library as it somewhat fulfils my original needs when writing this one! 😁 - however it would appear this one is turning into a slightly more modern interface which may prove useful for some.

[jonnyreeves]

Opened as jonnyreeves/fetch-readablestream#1