HttpServletRequest cheat sheet

Many HttpServletRequest properties can be confusing, so I decided to create this cheat sheet. (Properties can have similar names, some properties contain delimiters and some don’t, etc.) Let’s say your domain is domain.com, and it points to a router which forwards the request to port 8080 on a server called bob with a local IP of 192.168.0.100. Now we look at some properties for a request to http://domain.com/app/servlet/extra?query.

Property Value Notes
contextPath /app
localAddr 192.168.0.100
localName bob
localPort 8080
pathInfo /extra may be null
protocol HTTP/1.1 protocol is NOT http or https, that is scheme
queryString query may be null
requestURI /app/servlet/extra doesn’t contain query
requestURL http://domain.com/app/servlet/extra doesn’t contain query
scheme http
serverName domain.com
serverPort 80
servletPath /servlet

Note that I wanted to keep it smallish, so I’ve only included useful, non-obvious String and int properties. For instance, pathTranslated is useless, so I left it out.

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