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WebServer: Enable deflate and gzip compression (#3677)

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* get-index: Enable deflate and gzip compression

* Spaces -> Tabs

* listen: Add optional `gzip=yes` parameter (defaults to "no")

* get-index: Add comment explaining the usage of `zlib.*Sync` instead of async.
This commit is contained in:
Moritz Ulrich
2019-01-27 17:23:24 +01:00
committed by Jeremy Ruston
parent 02fbae4200
commit 049244e8a8
3 changed files with 33 additions and 3 deletions
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30
core/modules/server/routes/get-index.js
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@@ -12,14 +12,40 @@ GET /
/*global $tw: false */
"use strict";
var zlib = require('zlib');
exports.method = "GET";
exports.path = /^\/$/;
exports.handler = function(request,response,state) {
response.writeHead(200, {"Content-Type": state.server.get("root-serve-type")});
var acceptEncoding = request.headers['accept-encoding'];
if (!acceptEncoding) { acceptEncoding = ''; }
var text = state.wiki.renderTiddler(state.server.get("root-render-type"),state.server.get("root-tiddler"));
response.end(text,"utf8");
var responseHeaders = {
"Content-Type": state.server.get("root-serve-type")
};
/*
If the gzip=yes flag for `listen` is set, check if the user agent permits
compression. If so, compress our response. Note that we use the synchronous
functions from zlib to stay in the imperative style. The current `Server`
doesn't depend on this, and we may just as well use the async versions.
*/
if(state.server.enableGzip) {
if (/\bdeflate\b/.test(acceptEncoding)) {
responseHeaders['Content-Encoding'] = 'deflate';
text = zlib.deflateSync(text);
} else if (/\bgzip\b/.test(acceptEncoding)) {
responseHeaders['Content-Encoding'] = 'gzip';
text = zlib.gzipSync(text);
}
}
response.writeHead(200, responseHeaders);
response.end(text);
};
}());