53 lines
1.8 KiB
JavaScript
53 lines
1.8 KiB
JavaScript
var path = require('path');
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var fs = require('fs');
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var winston = require('winston');
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// For serving static assets
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var StaticHandler = function(path) {
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this.basePath = path;
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this.defaultPath = '/index.html';
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// Grab the list of available files - and move into hash for quick lookup
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var available = fs.readdirSync(this.basePath);
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this.availablePaths = {};
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for (var i = 0; i < available.length; i++) {
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this.availablePaths['/' + available[i]] = true;
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}
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};
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// Determine the content type for a given extension
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StaticHandler.contentTypeFor = function(ext) {
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if (ext == '.js') return 'text/javascript';
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else if (ext == '.css') return 'text/css';
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else if (ext == '.html') return 'text/html';
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else if (ext == '.ico') return 'image/ico';
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else {
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winston.error('unable to determine content type for static asset with extension: ' + ext);
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return 'text/plain';
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}
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};
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// Handle a request, and serve back the asset if it exists
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StaticHandler.prototype.handle = function(incPath, response) {
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// Go to index if not found or /
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if (!this.availablePaths[incPath]) incPath = this.defaultPath;
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var filePath = this.basePath + (incPath == '/' ? this.defaultPath : incPath);
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// And then stream the file back
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var _this = this;
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fs.readFile(filePath, function(error, content) {
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if (error) {
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winston.error('unable to read file', { path: filePath, error: error.message });
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response.writeHead(500, { 'content-type': 'application/json' });
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response.end(JSON.stringify({ message: 'IO: Unable to read file' }));
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}
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else {
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var contentType = StaticHandler.contentTypeFor(path.extname(filePath));
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response.writeHead(200, { 'content-type': contentType });
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response.end(content, 'utf-8');
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}
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});
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};
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module.exports = StaticHandler;
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