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.


Comments

Post a Comment

Popular posts from this blog

commonjs - How to write a typescript definition file for a node module that exports a function? -

consider, toml node module can use: // toml.d.ts declare module toml { export function parse(value:string):any; } declare module "toml" { export = toml; } then: /// <reference path="../../../../../defs/toml/toml.d.ts"/> import toml = require('toml'); toml.parse(...); however, node module export single function, such 'glob' ( https://github.com/isaacs/node-glob ). the node usage of module be: var glob = require("glob") glob("*.js", {}, callback(err, files) { ... }); you'd naively expect this: // glob.d.ts declare function globs(paths:string, options:any, callback:{(err:any, files:string[]):void; ...but because typescripts 'import' semantics bit strange, seems can use 'import .. = require()' statement alias modules . trying call: /// <reference path="../../../../../defs/glob/glob.d.ts"/> import blog = require('glob'); results in: error ts2072: mod
Read more

openid - Okta: Failed to get authorization code through API call -

i'm integrating okta own idp server using okta's api. i'm implementing authorization code flow following steps below: in own server, use /api/v1/authn endpoint sessiontoken. use sessiontoken obtain authorization calling endpoint: /oauth2/v1/authorize?client_id=" + clientid + "&sessiontoken=" + sessiontoken + "&response_type=code&response_mode=query&scope=openid&redirect_uri=" + redirecturl + "&state=evanyang&nonce=" it's supposed return response status code 302 , location header containing redirect url code value. however, keep getting response status code 200 , without location header, html body saying "you using unsupported browser." , "javascript disabled on browser." according api documentation: http://developer.okta.com/docs/api/resources/oidc.html#authentication-request , sessiontoken parameter sufficient this: an okta one-time sessiontoken. allows api-based
Read more

thorough guide for profiling racket code -

did googling ("racket profiling", "racket measure performance"), didn't find , there no examples in docs. did google "profile" search on htdp - no luck. (profile (f ...)) output isn't obvious other small snippets. ideally want python's python -m cprofile usage examples. when search "python profiling", both duckduckgo , google give top result: 26.4. python profilers . (although scanned quickly, seems more of reference "thorough usage guide" examples. if had else in mind, perhaps please link that?) the equivalent racket documentation be: profile: statistical profiler . a usage example: #lang racket (require profile) (profile-thunk (thunk (function-to-profile arg0 arg1) )) here (thunk e) convenience (lambda () e) . bigger example: #lang racket (module mod racket (provide f) (define (f) (for/list ([i 10000]) i))) (require (prefix-in mod: 'mod)) (define (f) (for ([i 10000
Read more