Tomcat static resources

Posted on | Edited on | In

Config

$CATALINA_HOME\conf\web.conf

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<servlet>
    <servlet-name>default</servlet-name>
    <servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-class>
    <init-param>
        <param-name>debug</param-name>
        <param-value>0</param-value>
    </init-param>
    <init-param>
        <param-name>listings</param-name>
        <param-value>false</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

When param listings is true, / can list all files

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<!-- The mapping for the default servlet -->
<servlet-mapping>
    <servlet-name>default</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

The pattern mapping is this, for all no mapping servlet-mapping request.

Process

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protected void doGet(HttpServletRequest request,
  HttpServletResponse response)
    throws IOException, ServletException {
      // Serve the requested resource, including the data content
      serveResource(request, response, true, fileEncoding);
    }
  1. judge resource existence
  2. judge file readable
  3. set response head content-type base on file type
  4. judge file time
  5. set response timeout
  6. stream operation

tomcat