import { NextRequest , NextResponse } from 'next/server' ; const DATADOME_TIMEOUT = 500 ; const DATADOME_URI_REGEX_EXCLUSION = /\.(avi|flv|mka|mkv|mov|mp4|mpeg|mpg|mp3|flac|ogg|ogm|opus|wav|webm|webp|bmp|gif|ico|jpeg|jpg|png|svg|svgz|swf|eot|otf|ttf|woff|woff2|css|less|js)$/i ; export default async function datadome ( req ) { const { pathname } = req . nextUrl ; if ( DATADOME_URI_REGEX_EXCLUSION . test ( pathname ) ) { return ; } const requestData = { Key : process . env . DATADOME_SERVER_KEY , RequestModuleName : 'Next.js' , ModuleVersion : '0.1' , ServerName : 'vercel' , IP : req . headers . get ( 'x-forwarded-for' ) ? req . headers . get ( 'x-forwarded-for' ) ! . split ( ',' ) [ 0 ] : '127.0.0.1' , Port : 0 , TimeRequest : new Date ( ) . getTime ( ) * 1000 , Protocol : req . headers . get ( 'x-forwarded-proto' ) , Method : req . method , ServerHostname : req . headers . get ( 'host' ) , Request : pathname + encode ( Object . fromEntries ( req . nextUrl . searchParams ) ) , HeadersList : getHeadersList ( req ) , Host : req . headers . get ( 'host' ) , UserAgent : req . headers . get ( 'user-agent' ) , Referer : req . headers . get ( 'referer' ) , Accept : req . headers . get ( 'accept' ) , AcceptEncoding : req . headers . get ( 'accept-encoding' ) , AcceptLanguage : req . headers . get ( 'accept-language' ) , AcceptCharset : req . headers . get ( 'accept-charset' ) , Origin : req . headers . get ( 'origin' ) , XForwaredForIP : req . headers . get ( 'x-forwarded-for' ) , Connection : req . headers . get ( 'connection' ) , Pragma : req . headers . get ( 'pragma' ) , CacheControl : req . headers . get ( 'cache-control' ) , ContentType : req . headers . get ( 'content-type' ) , From : req . headers . get ( 'from' ) , Via : req . headers . get ( 'via' ) , CookiesLen : getCookiesLength ( req . cookies ) , AuthorizationLen : getAuthorizationLength ( req ) , PostParamLen : req . headers . get ( 'content-length' ) , ClientID : req . cookies . datadome , ServerRegion : 'sfo1' , } ; const dataDomeReq = fetch ( 'http://api-cloudflare.datadome.co/validate-request/' , { method : 'POST' , headers : { 'Content-Type' : 'application/x-www-form-urlencoded' , 'User-Agent' : 'DataDome' , } , body : stringify ( requestData ) , } ) ; const timeoutPromise = new Promise ( ( resolve , reject ) => { setTimeout ( ( ) => { reject ( new Error ( 'Datadome timeout' ) ) ; } , DATADOME_TIMEOUT ) ; } ) ; let dataDomeRes ; const dataDomeStart = Date . now ( ) ; try { dataDomeRes = ( await Promise . race ( [ dataDomeReq , timeoutPromise , ] ) ) as Response ; } catch ( err ) { console . error ( 'Datadome failed with:' , err . stack ) ; return ; } console . log ( 'Datadome debug' , dataDomeRes . status , JSON . stringify ( Object . fromEntries ( dataDomeRes . headers . entries ( ) ) , null , 2 ) ) ; switch ( dataDomeRes . status ) { case 301 : case 302 : case 401 : case 403 : const isBot = dataDomeRes . headers . get ( 'x-datadome-isbot' ) ; if ( isBot ) { console . log ( 'Bot detected. Name:' , dataDomeRes . headers . get ( 'x-datadome-botname' ) , '– Kind:' , dataDomeRes . headers . get ( 'x-datadome-botfamily' ) ) ; } return new NextResponse ( await dataDomeRes . text ( ) , { headers : Object . assign ( toHeaders ( req . headers , dataDomeRes . headers , 'x-datadome-headers' ) , { 'x-datadome-latency' : `${ Date . now ( ) - dataDomeStart }` } ) , } ) ; case 400 : console . log ( 'DataDome returned 400' , dataDomeRes . statusText ) ; return ; case 200 : { const res = NextResponse . next ( ) ; Object . entries ( toHeaders ( req . headers , dataDomeRes . headers , 'x-datadome-headers' ) ) . forEach ( ( [ k , v ] ) => { res . headers . set ( k , v ) ; } ) ; res . headers . set ( 'x-datadome-latency' , `${ Date . now ( ) - dataDomeStart }` ) ; return res ; } } } function encode ( query ) { let e = '' ; for ( const k in query ) { const v = query [ k ] ; e += `${ encodeURIComponent ( k ) }=${ encodeURIComponent ( v ) }` ; } return e ; } function toHeaders ( reqHeaders , dataDomeResHeaders , listKey ) { const ret = { } ; const list = dataDomeResHeaders . get ( listKey ) ! ; for ( const header of list . split ( ' ' ) ) { const value = dataDomeResHeaders . get ( header ) ! ; if ( header . toLowerCase ( ) === 'set-cookie' && /domain=\.vercel\.app/i . test ( value ) ) { ret [ header ] = value . replace ( /domain=\.vercel\.app/i , `Domain=${ reqHeaders . get ( 'host' ) }` ) ; } else { ret [ header ] = value ; } } return ret ; } function getHeadersList ( req ) { return [ ... req . headers . keys ( ) ] . join ( ',' ) ; } function getAuthorizationLength ( req ) { const authorization = req . headers . get ( 'authorization' ) ; return authorization === null ? null : authorization . length ; } function stringify ( obj ) { return obj ? Object . keys ( obj ) . map ( ( key ) => { const value = obj [ key ] ; if ( value === undefined ) { return '' ; } return value === null || value === undefined ? encodeURIComponent ( key ) : encodeURIComponent ( key ) + '=' + encodeURIComponent ( value ) ; } ) . filter ( ( x ) => x . length > 0 ) . join ( '&' ) : '' ; } function getCookiesLength ( cookies ) { let cookiesLength = 0 ; for ( const k in cookies ) { cookiesLength += cookies [ k ] . length ; } return cookiesLength ; }