java - Query on default page of Tomcat server -


this basic question understand.

i running fresh apache tomcat server on port 8080, , when type url http://localhost:8080, see browser sends following request tomcat.

get / http/1.1 host: localhost:8080 connection: keep-alive cache-control: max-age=0 accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 user-agent: mozilla/5.0 (windows nt 6.1; wow64) applewebkit/537.36 (khtml, gecko) chrome/35.0.1916.114 safari/537.36 accept-encoding: gzip,deflate,sdch accept-language: en-us,en;q=0.8

i see below http response content-type:text/html

enter image description here

my question:

1) how / parameter of get request mapped above html page response @ tomcat side, when tomcat server received get request? below xml element in tomcat/conf/web.xml? flow on tomcat side after receiving request?

<!-- mapping default servlet -->     <servlet-mapping>         <servlet-name>default</servlet-name>         <url-pattern>/</url-pattern>     </servlet-mapping>

tomcat architecture

a uml sequence diagram of request process flow understand it.

read more following sections directly official document of apache tomcat 7:

  • overview - overview of tomcat server architecture key terms , concepts.
  • server startup - detailed description, sequence diagrams, of how tomcat server starts up.
  • request process flow - detailed description of how tomcat handles request.

it might understand url-pattern

servlet matching procedure

a request may match more 1 servlet-mapping in given context. servlet container uses straightforward matching procedure determine best match.

the matching procedure has four simple rules.

  • first, container prefers exact path match on wildcard path match.

  • second, container prefers match longest pattern.

  • third, container prefers path matches on filetype matches.

  • finally, pattern <url-pattern>/</url-pattern> matches request no other pattern matches.

have @ post how servlets filter identify next destination filter or servlet/jsp? detailed description understand visually.


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