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Code Issues Releases Wiki Activity

cache static assets in memory

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This commit is contained in:
John Crepezzi 2011-11-21 22:19:43 -05:00
parent e4da28de8a
commit 83cb68ada2
2 changed files with 26 additions and 2 deletions
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6
TODO
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@ -1,10 +1,12 @@
cache headers for static assets (and on document GET)
tests
add FAVICON (or force 404)
cache static in memory
add feedback for errors to UI - esp. too long
copy URL to clipboard button
add about page
make asset caching optional
todo store buffer instead of string while grabbing contents (if possible)
write cache to use callback instead of using non-DRY code
# shared version only
some way to do announcements easily (and use for ads)
copy URL to clipboard button

22
lib/static_handler.js
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@ -16,6 +16,8 @@ var StaticHandler = function(path) {
}
};
StaticHandler.cache = {};
// Determine the content type for a given extension
StaticHandler.contentTypeFor = function(ext) {
if (ext == '.js') return 'text/javascript';
@ -34,6 +36,16 @@ StaticHandler.prototype.handle = function(incPath, response) {
if (!this.availablePaths[incPath]) incPath = this.defaultPath;
var filePath = this.basePath + (incPath == '/' ? this.defaultPath : incPath);
// And then stream the file back
if (StaticHandler.cache[filePath]) {
this.serveCached(filePath, response);
}
else {
this.retrieve(filePath, response);
}
};
// Retrieve from the file
StaticHandler.prototype.retrieve = function(filePath, response) {
var _this = this;
fs.readFile(filePath, function(error, content) {
if (error) {
@ -45,8 +57,18 @@ StaticHandler.prototype.handle = function(incPath, response) {
var contentType = StaticHandler.contentTypeFor(path.extname(filePath));
response.writeHead(200, { 'content-type': contentType });
response.end(content, 'utf-8');
// Stick it in the cache
StaticHandler.cache[filePath] = content;
}
});
};
// Retrieve from memory cache
StaticHandler.prototype.serveCached = function(filePath, response) {
var contentType = StaticHandler.contentTypeFor(path.extname(filePath));
response.writeHead(200, { 'content-type': contentType });
response.end(StaticHandler.cache[filePath], 'utf-8');
};
module.exports = StaticHandler;