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add option to specify available encodings #27

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gfemec
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@gfemec gfemec commented Jan 1, 2015

closes #25

@hex7c0
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hex7c0 commented Jan 26, 2015

+1

@@ -157,7 +158,7 @@ function compression(options) {

// compression method
var accept = accepts(req)
var method = accept.encoding(['gzip', 'deflate', 'identity'])
var method = accept.encoding(available)

// negotiation failed
if (!method || method === 'identity') {
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Correct me if I'm wrong, but I think it always needs to have the identity fallback.

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right
if you want disable deflate algorithm, you should use ['gzip', 'identity']

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Right. I'm not sure if the interface should make the user include identity

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before force identity, people should check the presence of their algorithms inside this module

worst case? ciao like a new superpowerful algorithm :)
['ciao', 'identity'] as option
ab -v 4 -H "Accept-Encoding: ciao" -c 1 -n 1 127.0.0.1:3000/with_compression

LOG: header received:
HTTP/1.1 200 OK
Content-Type: text/plain
Vary: Accept-Encoding
Content-Encoding: ciao
Date: Mon, 26 Jan 2015 18:59:20 GMT
Connection: close

sent with deflate algorithm https://github.com/expressjs/compression/blob/master/index.js#L172

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@hex7c0 , right, that is another case that needs to be fixed and why this PR hasn't been merged just yet :)

@bjohansebas
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The way forward for this functionality would be as described in #25 (comment), which would bring breaking changes, so we need to wait for a future major release to launch it.

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option to disable DEFLATE encoding
6 participants