Internet Protocol Cheat Sheet

HTTP, TCP, and IP

Firewalls

• https://github.com/squarism/firewool

HTTP Headers

Here is a complete list of HTTP headers. The focus of this section is on the most common ones and how to use them in Tower.

Request Headers

Example request headers to http://towerjs.org:

Accept:     application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_7; en-us) AppleWebKit/533.21.1 (KHTML, like Gecko) Version/5.0.5 Safari/533.21.1

Accept

Authorization Header

Cache-Control

Cookie

Content-Length

If-None-Match Header

Used to check an ETag.

User-Agent

X-Requested-With

Response Headers

Example response headers from http://towerjs.org

Age:                0
Connection:         close
Content-Encoding:   gzip
Content-Type:       text/html
Date:               Sat, 31 Mar 2012 20:58:56 GMT
Server:             nginx
Set-Cookie:         connect.sid=PUkUFKR8xSKYRLTlXSFKIpWL.XgLU%2BftoQsQzbWcjMc7Im1eiUHSiu7EfZOCbm9v0e9Z; domain=.undefined; path=/; expires=Sun, 01 Apr 2012 00:58:56 GMT; httpOnly
Transfer-Encoding:  Identity
Via:                1.1 varnish
X-Varnish:          2212951983

Age

Cache-Control

Connection

Content-Encoding

Content-Length

Content-Type

Date

ETag Header

Location

Server Header

Set-Cookie Header

Via

X-Powered-By

Not a good idea to use this because it tells hackers too much about your app - now if there's a security hole in the framework, they know they can take advantage of this on your app.

X-XSS-Protection

HTTP Methods

HTTP Proxies (Proxy Servers)

HTTP Redirects

Resources

• http://en.wikipedia.org/wiki/List_of_HTTP_status_codes
• http://en.wikipedia.org/wiki/Application_layer
• http://en.wikipedia.org/wiki/List_of_HTTP_header_fields

HTTP Request Methods and REST

HTTP Status Codes

Copied from the Wikipedia page.

1xx (Informational)

2xx (Success)

3xx (Redirection)

4xx (Client Error)

5xx (Server Error)

HTTP Web Servers

Quick overview of Web Servers in relation to Tower

Node.js' built in web server

Nginx

Resources

• http://en.wikipedia.org/wiki/Internet_protocol_suite
• http://en.wikipedia.org/wiki/Application_layer
• http://en.wikipedia.org/wiki/Proxy_server