71 lines
1.5 KiB
JavaScript
71 lines
1.5 KiB
JavaScript
"use strict";
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/**
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* Module dependencies.
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*/
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var _require = require('string_decoder'),
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StringDecoder = _require.StringDecoder;
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var Stream = require('stream');
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var zlib = require('zlib');
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/**
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* Buffers response data events and re-emits when they're unzipped.
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*
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* @param {Request} req
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* @param {Response} res
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* @api private
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*/
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exports.unzip = function (req, res) {
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var unzip = zlib.createUnzip();
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var stream = new Stream();
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var decoder; // make node responseOnEnd() happy
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stream.req = req;
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unzip.on('error', function (err) {
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if (err && err.code === 'Z_BUF_ERROR') {
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// unexpected end of file is ignored by browsers and curl
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stream.emit('end');
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return;
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}
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stream.emit('error', err);
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}); // pipe to unzip
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res.pipe(unzip); // override `setEncoding` to capture encoding
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res.setEncoding = function (type) {
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decoder = new StringDecoder(type);
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}; // decode upon decompressing with captured encoding
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unzip.on('data', function (buf) {
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if (decoder) {
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var str = decoder.write(buf);
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if (str.length > 0) stream.emit('data', str);
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} else {
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stream.emit('data', buf);
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}
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});
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unzip.on('end', function () {
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stream.emit('end');
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}); // override `on` to capture data listeners
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var _on = res.on;
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res.on = function (type, fn) {
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if (type === 'data' || type === 'end') {
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stream.on(type, fn.bind(res));
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} else if (type === 'error') {
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stream.on(type, fn.bind(res));
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_on.call(res, type, fn);
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} else {
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_on.call(res, type, fn);
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}
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return this;
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};
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}; |