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handlers.go
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handlers.go
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package server
import (
"errors"
"fmt"
"go.uber.org/zap"
"net"
"net/http"
"strings"
"time"
"github.com/emicklei/go-restful"
)
func (s *Server) signToken(req *restful.Request, decodeScopeFunc ScopeDecoder, isActionMatchFunc ScopeMatcher) (token *Token, status int, err error) {
var scope, resultScope AccessScope
status = 200
accountArg := req.QueryParameter("account")
scopeArg := req.QueryParameter("scope")
clientIP := getClientIP(req.Request)
defer func() {
debug := fmt.Sprintf("%s %s %d %v", clientIP, req.Request.URL.String(), status, err)
logger.Debug(debug, zap.String("func", "signToken"))
info := fmt.Sprintf("%s | %s | %s | %v | %v | %d | %v", clientIP, accountArg, scopeArg, scope, resultScope, status, err)
logger.Info(info, zap.String("func", "signToken"))
}()
user, err := s.processor.Authenticate(req.HeaderParameter("Authorization"))
if err != nil {
status = http.StatusUnauthorized
return
}
scope, err = decodeScopeFunc(req.Request)
if err != nil {
status = http.StatusBadRequest
return
}
resultScope = s.processor.Authorize(user, scope)
if len(resultScope) == 0 {
resultScope = s.processor.Authorize(AnonymousUser, scope)
}
if isActionMatchFunc != nil {
if !isActionMatchFunc(req.Request, resultScope, scope) {
err = ErrNotHandleAuthHeader
return
}
}
authService := req.QueryParameter("service")
if authService == "" {
authService = s.BasicConfig.AuthService
}
token, err = s.processor.Sign(user, authService, resultScope)
if err != nil {
status = http.StatusInternalServerError
return
}
return
}
// HandleAuth handle registry auth
func (s *Server) HandleAuth(req *restful.Request, res *restful.Response) {
var err error
var status int
now := time.Now()
defer func() {
if err != nil {
res.WriteErrorString(status, err.Error())
}
ms := time.Since(now).Milliseconds()
info := fmt.Sprintf("%s %s %d ms", req.Request.Method, req.Request.URL.String(), ms)
logger.Info(info, zap.String("func", "HandleAuth"))
}()
token, status, err := s.signToken(req, DecodeScope, nil)
if err != nil {
return
}
_ = req.QueryParameter("client_id")
_ = req.QueryParameter("offline_token")
res.WriteAsJson(token)
}
func (s *Server) HandleProxy(res http.ResponseWriter, req *http.Request) {
now := time.Now()
clientIP := getClientIP(req)
if s.BasicConfig.RegistryBackend == "" {
res.WriteHeader(http.StatusNotFound)
res.Write([]byte("no registry-backend config"))
return
}
status, err := handleAuthorizationHeader(s, req)
if err != nil {
res.WriteHeader(status)
res.Write([]byte(err.Error()))
return
}
req.Header.Add("Host", req.Host)
defer func() {
ms := time.Since(now).Milliseconds()
info := fmt.Sprintf("%s | %s %s => %s %d ms", clientIP, req.Method, req.URL.Path, s.BasicConfig.RegistryBackend, ms)
logger.Info(info, zap.String("func", "HandleProxy"))
}()
req.URL.Host = req.Host
s.proxy.ServeHTTP(res, req)
}
func handleAuthorizationHeader(server *Server, req *http.Request) (int, error) {
authHeader := req.Header.Get("Authorization")
if strings.HasPrefix(authHeader, BasicPrefix) {
token, status, err := server.signToken(restful.NewRequest(req), DecodeScopeFromUrl, IsScopeActionMatch)
if err == nil {
req.Header.Set("Authorization", BearerPrefix+token.Token)
} else if !errors.Is(err, ErrNotHandleAuthHeader) {
return status, err
}
}
return http.StatusOK, nil
}
func getClientIP(req *http.Request) string {
realIP := req.Header.Get("X-Real-Ip")
if realIP != "" {
return realIP
}
forwarded := req.Header.Get("X-Forwarded-For")
if forwarded != "" {
return strings.Split(forwarded, ",")[0]
}
ip, _, err := net.SplitHostPort(req.RemoteAddr)
if err == nil {
return ip
}
return req.RemoteAddr
}