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lint: src/node/utils/caching_middleware.js

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Richard Hansen 2021-02-26 19:47:23 -05:00 • committed by webzwo0i
parent 392d9dcfde
commit 7ab3ee2121
1 changed files with 23 additions and 23 deletions
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46
src/node/utils/caching_middleware.js
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@ -85,14 +85,14 @@ CachingMiddleware.prototype = new function () {
return next(undefined, req, res);
}
const old_req = {};
const old_res = {};
const oldReq = {};
const oldRes = {};
const supportsGzip =
(req.get('Accept-Encoding') || '').indexOf('gzip') !== -1;
const path = require('url').parse(req.url).path;
const cacheKey = generateCacheKey(path);
const url = new URL(req.url, 'http://localhost');
const cacheKey = generateCacheKey(url.pathname + url.search);
fs.stat(`${CACHE_DIR}minified_${cacheKey}`, (error, stats) => {
const modifiedSince = (req.headers['if-modified-since'] &&
@ -105,7 +105,7 @@ CachingMiddleware.prototype = new function () {
}
// Always issue get to downstream.
old_req.method = req.method;
oldReq.method = req.method;
req.method = 'GET';
const expirationDate = new Date(((responseCache[cacheKey] || {}).headers || {}).expires);
@ -115,18 +115,18 @@ CachingMiddleware.prototype = new function () {
}
const _headers = {};
old_res.setHeader = res.setHeader;
oldRes.setHeader = res.setHeader;
res.setHeader = (key, value) => {
// Don't set cookies, see issue #707
if (key.toLowerCase() === 'set-cookie') return;
_headers[key.toLowerCase()] = value;
old_res.setHeader.call(res, key, value);
oldRes.setHeader.call(res, key, value);
};
old_res.writeHead = res.writeHead;
res.writeHead = function (status, headers) {
res.writeHead = old_res.writeHead;
oldRes.writeHead = res.writeHead;
res.writeHead = (status, headers) => {
res.writeHead = oldRes.writeHead;
if (status === 200) {
// Update cache
let buffer = '';
@ -136,20 +136,20 @@ CachingMiddleware.prototype = new function () {
});
headers = _headers;
old_res.write = res.write;
old_res.end = res.end;
res.write = function (data, encoding) {
oldRes.write = res.write;
oldRes.end = res.end;
res.write = (data, encoding) => {
buffer += data.toString(encoding);
};
res.end = function (data, encoding) {
res.end = (data, encoding) => {
async.parallel([
function (callback) {
(callback) => {
const path = `${CACHE_DIR}minified_${cacheKey}`;
fs.writeFile(path, buffer, (error, stats) => {
callback();
});
},
function (callback) {
(callback) => {
const path = `${CACHE_DIR}minified_${cacheKey}.gz`;
zlib.gzip(buffer, (error, content) => {
if (error) {
@ -168,10 +168,10 @@ CachingMiddleware.prototype = new function () {
};
} else if (status === 304) {
// Nothing new changed from the cached version.
old_res.write = res.write;
old_res.end = res.end;
res.write = function (data, encoding) {};
res.end = function (data, encoding) { respond(); };
oldRes.write = res.write;
oldRes.end = res.end;
res.write = (data, encoding) => {};
res.end = (data, encoding) => { respond(); };
} else {
res.writeHead(status, headers);
}
@ -184,9 +184,9 @@ CachingMiddleware.prototype = new function () {
// TODO: Implement locking on write or ditch caching of gzip and use
// existing middlewares.
function respond() {
req.method = old_req.method || req.method;
res.write = old_res.write || res.write;
res.end = old_res.end || res.end;
req.method = oldReq.method || req.method;
res.write = oldRes.write || res.write;
res.end = oldRes.end || res.end;
const headers = {};
Object.assign(headers, (responseCache[cacheKey].headers || {}));