Commit 83cb68ad authored by John Crepezzi's avatar John Crepezzi
Browse files

cache static assets in memory

parent e4da28de

TODO

+4 −2
Original line number Diff line number Diff line 
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

lib/static_handler.js

+22 −0
Original line number Diff line number Diff line
@@ -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;