Node Static HTTP Servers

Examples of serving static files with HTTP using Node.js on five levels of abstraction - from express.static to directly using the net module with raw TCP sockets.

It was written for the answer on Stack Overflow:

• How to serve an image using Node.js

Read this answer for some background and better explanation.

Other related answers on Stack Overflow:

• Failed to load resource from same directory when redirecting Javascript
• onload js call not working with node
• Sending whole folder content to client with express
• Loading partials fails on the server JS
• Node JS not serving the static image

Examples

Every example serves the same files from the public directory and supports the minumum functionality of:

• MIME types for most common files
• must serve HTML, JS, CSS, plain text and images
• serves index.html as a default directory index
• responds with error codes for missing files
• no path traversal vulnerabilities
• no race conditions while reading files

Every version is tested with Travis on Node versions 4, 5, 6 and 7. See test results.

All examples:

1. express.static
2. express
3. connect
4. http
5. net

express.static

estatic.js (raw)

This version uses the express.static built-in middleware of the express module.

This example has the most functionality and the least amount of code.

express

express.js (raw)

This version uses the express module but without the express.static middleware. Serving static files is implemented as a single route handler using streams.

This example has simple path traversal countermeasures and supports a limited set of most common MIME types.

connect

connect.js (raw)

This version uses the connect module which is a one level of abstraction lower than express.

This example has similar functionality to the express version but using slightly lower-lever APIs.

http

http.js (raw)

This version uses the http module which is the lowest-level API for HTTP in Node.

This example has similar functionality to the connect version but using even more lower-level APIs.

net

net.js (raw)

This version uses the net module which is the lowest-level API for TCP sockets in Node.

This example has some of the functionality of the http version but the minimal and incomplete HTTP protocol has been implemented from scratch. Since it doesn't support chunked encoding it loads the files into memory before serving them to know the size before sending a response because statting the files and then loading would introduce a race condition.

Installation

Download the files using git:

git clone git@github.com:rsp/node-static-http-servers.git
# or:
git clone https://github.com/rsp/node-static-http-servers.git

Or download a ZIP file:

wget https://github.com/rsp/node-static-http-servers/archive/master.zip
tar xzvf master.zip

Install dependencies:

npm install

Running tests:

npm test

Running individual servers:

node net.js
node http.js
node connect.js
node express.js
node estatic.js

Issues

For any bug reports or feature requests please post an issue on GitHub.

Author

Rafał Pocztarski

License

MIT License (Expat). See LICENSE.md for details.