107 lines
3.9 KiB
JavaScript
107 lines
3.9 KiB
JavaScript
'use strict';
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exports.__esModule = true;
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var fs = require("fs");
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var path_1 = require("path");
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var crypto_1 = require("crypto");
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function jsonParse(data, cb) {
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var result = null;
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try {
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result = JSON.parse(data);
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}
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catch (ex) {
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return cb(ex);
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}
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cb(null, result);
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}
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var FileCache = /** @class */ (function () {
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function FileCache(location) {
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this._location = location;
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}
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FileCache.prototype.getResponse = function (url, callback) {
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var key = path_1.resolve(this._location, this.getCacheKey(url));
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fs.readFile(key + '.json', 'utf8', function (err, data) {
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if (err && err.code === 'ENOENT')
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return callback(null, null);
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else if (err)
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return callback(err, null);
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jsonParse(data, function (err, response) {
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if (err) {
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return callback(err, null);
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}
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var body = fs.createReadStream(key + '.body');
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response.body = body;
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callback(null, response);
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});
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});
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};
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FileCache.prototype.setResponse = function (url, response) {
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var key = path_1.resolve(this._location, this.getCacheKey(url));
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var errored = false;
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fs.mkdir(this._location, { recursive: true }, function (err) {
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if (err && err.code !== 'EEXIST') {
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console.warn('Error creating cache: ' + err.message);
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return;
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}
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response.body.pipe(fs.createWriteStream(key + '.body')).on('error', function (err) {
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errored = true;
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console.warn('Error writing to cache: ' + err.message);
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}).on('close', function () {
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if (!errored) {
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fs.writeFile(key + '.json', JSON.stringify({
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statusCode: response.statusCode,
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headers: response.headers,
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requestHeaders: response.requestHeaders,
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requestTimestamp: response.requestTimestamp
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}, null, ' '), function (err) {
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if (err) {
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console.warn('Error writing to cache: ' + err.message);
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}
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});
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}
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});
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});
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};
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FileCache.prototype.updateResponseHeaders = function (url, response) {
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var key = path_1.resolve(this._location, this.getCacheKey(url));
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fs.readFile(key + '.json', 'utf8', function (err, data) {
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if (err) {
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console.warn('Error writing to cache: ' + err.message);
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return;
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}
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var parsed = null;
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try {
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parsed = JSON.parse(data);
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}
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catch (ex) {
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console.warn('Error writing to cache: ' + ex.message);
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return;
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}
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fs.writeFile(key + '.json', JSON.stringify({
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statusCode: parsed.statusCode,
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headers: response.headers,
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requestHeaders: parsed.requestHeaders,
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requestTimestamp: response.requestTimestamp
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}, null, ' '), function (err) {
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if (err) {
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console.warn('Error writing to cache: ' + err.message);
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}
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});
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});
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};
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FileCache.prototype.invalidateResponse = function (url, callback) {
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var key = path_1.resolve(this._location, this.getCacheKey(url));
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fs.unlink(key + '.json', function (err) {
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if (err && err.code === 'ENOENT')
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return callback(null);
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else
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callback(err || null);
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});
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};
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FileCache.prototype.getCacheKey = function (url) {
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var hash = crypto_1.createHash('sha512');
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hash.update(url);
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return hash.digest('hex');
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};
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return FileCache;
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}());
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exports["default"] = FileCache;
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