package Ġru . ver kh ov in . cloud ch ats . security Ċ Ċ import Ġio . json web token .* Ċ import Ġorg . springframework . security . authentication . Username Password Authentication Token Ċ import Ġorg . springframework . security . core . authority . Simple Granted Authority Ċ import Ġorg . springframework . security . core . context . SecurityContext Holder Ċ import Ġorg . springframework . web . filter . Once Per Request Filter Ċ import Ġru . ver kh ov in . cloud ch ats . exception . Unauthorized Exception Ċ import Ġru . ver kh ov in . cloud ch ats . model . dto . Account Auth Details Ċ import Ġru . ver kh ov in . cloud ch ats . model . dto . TokenType Ċ import Ġru . ver kh ov in . cloud ch ats . security . account . Account Principal Ċ import Ġru . ver kh ov in . cloud ch ats . security . token . AUTHOR ITIES _ CL AIM S Ċ import Ġru . ver kh ov in . cloud ch ats . security . token . TYPE _ CL AIM S Ċ import Ġru . ver kh ov in . cloud ch ats . service . Account Security Service Ċ import Ġru . ver kh ov in . cloud ch ats . service . Jwt Token Service Ċ import Ġjavax . servlet . FilterChain Ċ import Ġjavax . servlet . http . HttpServletRequest Ċ import Ġjavax . servlet . http . HttpServletResponse ĊĊ Ċ const Ġval ĠAUTH ORIZ ATION _ HEADER _ NAME Ġ= Ġ" Authorization " Ċ const Ġval ĠTOKEN _ PREFIX Ġ= Ġ" Bearer Ġ" Ċ Ċ class ĠJWT Authentication Filter ( ĊĠĠĠ Ġprivate Ġval Ġjwt Token Service : ĠJwt Token Service , Ċ ) Ġ: ĠOnce Per Request Filter () Ġ{ ĊĊĊĠ Ġoverride Ġfun Ġdo Filter Internal ( request : ĠHttpServletRequest , Ġresponse : ĠHttpServletResponse , Ġchain : ĠFilter Chain ) Ġ{ ĊĠĠĠ Ġtry Ġ{ ĊĠĠĠĠĠ Ġrequest . getHeader ( AUTHORIZATION _ HEADER _ NAME ) ĊĠĠĠĠĠĠĠĠĠ Ġ? . replace ( TOKEN _ PREFIX , Ġ"") ?. let Ġ{ Ġtoken Ġ-> ĊĠĠĠĠĠĠĠĠĠĠĠ Ġval Ġaccount Auth Details Ġ= Ġjwt Token Service . validate Token And Extract Account Details ( token , ĠTokenType . ACCESS ) ĊĠĠĠĠĠĠĠĠĠĠĠ Ġauthenticate ( account Auth Details ) ĊĠĠĠĠĠĠĠĠĠ Ġ} ĊĠĠĠ Ġ} Ġcatch Ġ( e : ĠExp ired Jwt Exception ) Ġ{ ĊĠĠĠĠĠ Ġthrow ĠUnauthorized Exception ( e . message !! ) ĊĠĠĠ Ġ} Ġcatch Ġ( e : ĠUnsupported Jwt Exception ) Ġ{ ĊĠĠĠĠĠ Ġthrow ĠUnauthorized Exception ( e . message !! ) ĊĠĠĠ Ġ} Ġcatch Ġ( e : ĠMal formed Jwt Exception ) Ġ{ ĊĠĠĠĠĠ Ġthrow ĠUnauthorized Exception ( e . message !! ) ĊĠĠĠ Ġ} ĊĠĠĠ Ġchain . do Filter ( request , Ġresponse ); ĊĠ Ġ} ĊĊĠ Ġprivate Ġfun Ġauthenticate ( account Auth Details : ĠAccount Auth Details ) Ġ{ ĊĠĠĠ Ġval Ġprincipal Ġ= ĠAccount Principal . create ( account Auth Details . account Details , ĊĠĠĠĠĠĠĠ Ġaccount Auth Details . author ities . map Ġ{ Ġrole : ĠString Ġ-> ĠSimple Granted Authority ( role ) Ġ}) ĊĠĠĠ Ġval Ġauth Ġ= ĠUsername Password Authentication Token ( ĊĠĠĠĠĠĠĠ Ġprincipal , ĊĠĠĠĠĠĠĠ Ġnull , ĊĠĠĠĠĠĠĠ Ġprincipal . author ities ĊĠĠĠ Ġ) ĊĠĠĠ ĠSecurity Context Holder . getContext (). authentication Ġ= Ġauth ĊĠ Ġ} ĊĊ Ċ }