221 lines
5.8 KiB
Go
221 lines
5.8 KiB
Go
package handler
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import (
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"net/http"
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"strconv"
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"strings"
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"github.com/nspcc-dev/neofs-s3-gw/api"
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"github.com/nspcc-dev/neofs-s3-gw/api/errors"
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"github.com/nspcc-dev/neofs-s3-gw/api/layer"
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)
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const (
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// DefaultMaxAge is a default value of Access-Control-Max-Age if this value is not set in a rule.
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DefaultMaxAge = 600
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wildcard = "*"
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)
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func (h *handler) GetBucketCorsHandler(w http.ResponseWriter, r *http.Request) {
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reqInfo := api.GetReqInfo(r.Context())
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bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
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if err != nil {
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h.logAndSendError(w, "could not get bucket info", reqInfo, err)
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return
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}
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cors, err := h.obj.GetBucketCORS(r.Context(), bktInfo)
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if err != nil {
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h.logAndSendError(w, "could not get cors", reqInfo, err)
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return
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}
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if err = api.EncodeToResponse(w, cors); err != nil {
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h.logAndSendError(w, "could not encode cors to response", reqInfo, err)
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return
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}
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}
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func (h *handler) PutBucketCorsHandler(w http.ResponseWriter, r *http.Request) {
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reqInfo := api.GetReqInfo(r.Context())
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bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
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if err != nil {
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h.logAndSendError(w, "could not get bucket info", reqInfo, err)
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return
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}
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p := &layer.PutCORSParams{
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BktInfo: bktInfo,
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Reader: r.Body,
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}
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if err = h.obj.PutBucketCORS(r.Context(), p); err != nil {
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h.logAndSendError(w, "could not put cors configuration", reqInfo, err)
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return
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}
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api.WriteSuccessResponseHeadersOnly(w)
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}
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func (h *handler) DeleteBucketCorsHandler(w http.ResponseWriter, r *http.Request) {
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reqInfo := api.GetReqInfo(r.Context())
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bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
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if err != nil {
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h.logAndSendError(w, "could not get bucket info", reqInfo, err)
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return
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}
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if err = h.obj.DeleteBucketCORS(r.Context(), bktInfo); err != nil {
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h.logAndSendError(w, "could not delete cors", reqInfo, err)
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}
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w.WriteHeader(http.StatusNoContent)
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}
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func (h *handler) AppendCORSHeaders(w http.ResponseWriter, r *http.Request) {
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if r.Method == http.MethodOptions {
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return
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}
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origin := r.Header.Get(api.Origin)
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if origin == "" {
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return
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}
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reqInfo := api.GetReqInfo(r.Context())
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if reqInfo.BucketName == "" {
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return
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}
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bktInfo, err := h.obj.GetBucketInfo(r.Context(), reqInfo.BucketName)
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if err != nil {
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return
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}
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cors, err := h.obj.GetBucketCORS(r.Context(), bktInfo)
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if err != nil {
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return
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}
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withCredentials := r.Header.Get(api.Authorization) != ""
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for _, rule := range cors.CORSRules {
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for _, o := range rule.AllowedOrigins {
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if o == origin {
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for _, m := range rule.AllowedMethods {
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if m == r.Method {
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w.Header().Set(api.AccessControlAllowOrigin, origin)
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w.Header().Set(api.AccessControlAllowMethods, strings.Join(rule.AllowedMethods, ", "))
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w.Header().Set(api.AccessControlAllowCredentials, "true")
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w.Header().Set(api.Vary, api.Origin)
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return
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}
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}
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}
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if o == wildcard {
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for _, m := range rule.AllowedMethods {
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if m == r.Method {
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if withCredentials {
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w.Header().Set(api.AccessControlAllowOrigin, origin)
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w.Header().Set(api.AccessControlAllowCredentials, "true")
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w.Header().Set(api.Vary, api.Origin)
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} else {
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w.Header().Set(api.AccessControlAllowOrigin, o)
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}
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w.Header().Set(api.AccessControlAllowMethods, strings.Join(rule.AllowedMethods, ", "))
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return
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}
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}
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}
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}
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}
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}
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func (h *handler) Preflight(w http.ResponseWriter, r *http.Request) {
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reqInfo := api.GetReqInfo(r.Context())
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bktInfo, err := h.obj.GetBucketInfo(r.Context(), reqInfo.BucketName)
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if err != nil {
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h.logAndSendError(w, "could not get bucket info", reqInfo, err)
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return
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}
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origin := r.Header.Get(api.Origin)
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if origin == "" {
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h.logAndSendError(w, "origin request header needed", reqInfo, errors.GetAPIError(errors.ErrBadRequest))
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}
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method := r.Header.Get(api.AccessControlRequestMethod)
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if method == "" {
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h.logAndSendError(w, "Access-Control-Request-Method request header needed", reqInfo, errors.GetAPIError(errors.ErrBadRequest))
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return
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}
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var headers []string
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requestHeaders := r.Header.Get(api.AccessControlRequestHeaders)
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if requestHeaders != "" {
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headers = strings.Split(requestHeaders, ", ")
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}
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cors, err := h.obj.GetBucketCORS(r.Context(), bktInfo)
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if err != nil {
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h.logAndSendError(w, "could not get cors", reqInfo, err)
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return
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}
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for _, rule := range cors.CORSRules {
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for _, o := range rule.AllowedOrigins {
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if o == origin || o == wildcard {
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for _, m := range rule.AllowedMethods {
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if m == method {
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if !checkSubslice(rule.AllowedHeaders, headers) {
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continue
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}
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w.Header().Set(api.AccessControlAllowOrigin, o)
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w.Header().Set(api.AccessControlAllowMethods, strings.Join(rule.AllowedMethods, ", "))
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if headers != nil {
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w.Header().Set(api.AccessControlAllowHeaders, requestHeaders)
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}
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if rule.ExposeHeaders != nil {
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w.Header().Set(api.AccessControlExposeHeaders, strings.Join(rule.ExposeHeaders, ", "))
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}
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if rule.MaxAgeSeconds > 0 || rule.MaxAgeSeconds == -1 {
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w.Header().Set(api.AccessControlMaxAge, strconv.Itoa(rule.MaxAgeSeconds))
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} else {
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w.Header().Set(api.AccessControlMaxAge, strconv.Itoa(h.cfg.DefaultMaxAge))
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}
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if o != wildcard {
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w.Header().Set(api.AccessControlAllowCredentials, "true")
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}
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api.WriteSuccessResponseHeadersOnly(w)
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return
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}
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}
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}
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}
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}
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h.logAndSendError(w, "Forbidden", reqInfo, errors.GetAPIError(errors.ErrAccessDenied))
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}
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func checkSubslice(slice []string, subSlice []string) bool {
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if sliceContains(slice, wildcard) {
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return true
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}
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if len(subSlice) > len(slice) {
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return false
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}
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for _, r := range subSlice {
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if !sliceContains(slice, r) {
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return false
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}
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}
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return true
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}
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func sliceContains(slice []string, str string) bool {
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for _, s := range slice {
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if s == str {
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return true
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}
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}
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return false
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}
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