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<title>Code coverage report for blackbird/modules/middleware/gzip.js</title>
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<a href="../../../index.html">all files</a> / <a href="index.html">blackbird/modules/middleware/</a> gzip.js
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">/* */
const zlib = require("zlib");
const mach = require("../index");
mach.extend(
require("../extensions/acceptEncoding")
);
const GZIP_MATCHER = /text|javascript|json/i;
function shouldGzipContentType(contentType) {
if (!contentType || contentType === "text/event-stream") {
return false;
}
return GZIP_MATCHER.test(contentType);
}
/**
* A middleware that gzip's the response content (see http://www.gzip.org/).
* Options may be any of node's zlib options (see http://nodejs.org/api/zlib.html).
*/
function gzip(app, options) {
return function (conn) {
return conn.run(app).then(function () {
const response = conn.response;
const headers = response.headers;
if (shouldGzipContentType(headers["Content-Type"]) && conn.acceptsEncoding("gzip")) {
response.content = response.content.pipe(zlib.createGzip(options));
Reflect.deleteProperty(headers, "Content-Length");
headers["Content-Encoding"] = "gzip";
headers.Vary = "Accept-Encoding";
}
});
};
}
module.exports = gzip;
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