87 lines
2.6 KiB
JavaScript
87 lines
2.6 KiB
JavaScript
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// This module provides a customFileHandler for karma
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// that serves files with urls like /packages_<timestamp>/...
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// with maximum cache.
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// We are using these urls when we spawn isolates
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// so that the isolates don't reload files every time.
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var common = require('karma/lib/middleware/common');
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var fs = require('fs');
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var DART_EVAL_PATH_RE = /.*\/packages_\d+\/(.*)$/;
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module.exports = createFactory;
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function createFactory(proxyPaths) {
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return {
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'framework:dart-evalcache': ['factory', dartEvalCacheFactory]
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};
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function dartEvalCacheFactory(emitter, logger, customFileHandlers) {
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var filesPromise = new common.PromiseContainer();
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emitter.on('file_list_modified', function(files) {
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filesPromise.set(files);
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});
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var serveFile = common.createServeFile(fs);
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var log = logger.create('dart-evalcache');
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customFileHandlers.push({
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urlRegex: DART_EVAL_PATH_RE,
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handler: handler
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});
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// See source_files handler
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function handler(request, response, fa, fb, basePath) {
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return filesPromise.then(function(files) {
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try {
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var requestedFilePath = mapUrlToFile(request.url, proxyPaths, basePath, log);
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// TODO(vojta): change served to be a map rather then an array
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var file = findByPath(files.served, requestedFilePath);
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if (file) {
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serveFile(file.contentPath || file.path, response, function() {
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common.setHeavyCacheHeaders(response);
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}, file.content);
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} else {
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response.writeHead(404);
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response.end('Not found');
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}
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} catch (e) {
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log.error(e.stack);
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response.writeHead(500);
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response.end('Error', e.stack);
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}
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});
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}
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};
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}
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function mapUrlToFile(url, proxyPaths, basePath, log) {
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var originalUrl = url;
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url = url.indexOf('?') > -1 ? url.substring(0, url.indexOf('?')) : url;
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var match = DART_EVAL_PATH_RE.exec(url);
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var packagePath = match[1];
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var result = null;
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var lastProxyFromLength = 0;
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Object.keys(proxyPaths).forEach(function(proxyFrom) {
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if (startsWith(packagePath, proxyFrom) && proxyFrom.length > lastProxyFromLength) {
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lastProxyFromLength = proxyFrom.length;
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result = proxyPaths[proxyFrom] + packagePath.substring(proxyFrom.length);
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}
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});
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return basePath + '/' + result;
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}
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function startsWith(string, subString) {
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return string.length >= subString.length && string.slice(0, subString.length) === subString;
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}
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function findByPath(files, path) {
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for (var i = 0; i < files.length; i++) {
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if (files[i].path === path) {
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return files[i];
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}
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}
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return null;
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}
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