forked from nspcc-dev/neofs-s3-gw
/
cors.go
225 lines (197 loc) · 5.98 KB
/
cors.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
package handler
import (
"net/http"
"strconv"
"strings"
"github.com/TrueCloudLab/frostfs-s3-gw/api"
"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
"go.uber.org/zap"
)
const (
// DefaultMaxAge is a default value of Access-Control-Max-Age if this value is not set in a rule.
DefaultMaxAge = 600
wildcard = "*"
)
func (h *handler) GetBucketCorsHandler(w http.ResponseWriter, r *http.Request) {
reqInfo := api.GetReqInfo(r.Context())
bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
if err != nil {
h.logAndSendError(w, "could not get bucket info", reqInfo, err)
return
}
cors, err := h.obj.GetBucketCORS(r.Context(), bktInfo)
if err != nil {
h.logAndSendError(w, "could not get cors", reqInfo, err)
return
}
if err = api.EncodeToResponse(w, cors); err != nil {
h.logAndSendError(w, "could not encode cors to response", reqInfo, err)
return
}
}
func (h *handler) PutBucketCorsHandler(w http.ResponseWriter, r *http.Request) {
reqInfo := api.GetReqInfo(r.Context())
bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
if err != nil {
h.logAndSendError(w, "could not get bucket info", reqInfo, err)
return
}
p := &layer.PutCORSParams{
BktInfo: bktInfo,
Reader: r.Body,
CopiesNumber: h.cfg.CopiesNumber,
}
if err = h.obj.PutBucketCORS(r.Context(), p); err != nil {
h.logAndSendError(w, "could not put cors configuration", reqInfo, err)
return
}
api.WriteSuccessResponseHeadersOnly(w)
}
func (h *handler) DeleteBucketCorsHandler(w http.ResponseWriter, r *http.Request) {
reqInfo := api.GetReqInfo(r.Context())
bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
if err != nil {
h.logAndSendError(w, "could not get bucket info", reqInfo, err)
return
}
if err = h.obj.DeleteBucketCORS(r.Context(), bktInfo); err != nil {
h.logAndSendError(w, "could not delete cors", reqInfo, err)
}
w.WriteHeader(http.StatusNoContent)
}
func (h *handler) AppendCORSHeaders(w http.ResponseWriter, r *http.Request) {
if r.Method == http.MethodOptions {
return
}
origin := r.Header.Get(api.Origin)
if origin == "" {
return
}
reqInfo := api.GetReqInfo(r.Context())
if reqInfo.BucketName == "" {
return
}
bktInfo, err := h.obj.GetBucketInfo(r.Context(), reqInfo.BucketName)
if err != nil {
h.log.Warn("get bucket info", zap.Error(err))
return
}
cors, err := h.obj.GetBucketCORS(r.Context(), bktInfo)
if err != nil {
h.log.Warn("get bucket cors", zap.Error(err))
return
}
withCredentials := r.Header.Get(api.Authorization) != ""
for _, rule := range cors.CORSRules {
for _, o := range rule.AllowedOrigins {
if o == origin {
for _, m := range rule.AllowedMethods {
if m == r.Method {
w.Header().Set(api.AccessControlAllowOrigin, origin)
w.Header().Set(api.AccessControlAllowMethods, strings.Join(rule.AllowedMethods, ", "))
w.Header().Set(api.AccessControlAllowCredentials, "true")
w.Header().Set(api.Vary, api.Origin)
return
}
}
}
if o == wildcard {
for _, m := range rule.AllowedMethods {
if m == r.Method {
if withCredentials {
w.Header().Set(api.AccessControlAllowOrigin, origin)
w.Header().Set(api.AccessControlAllowCredentials, "true")
w.Header().Set(api.Vary, api.Origin)
} else {
w.Header().Set(api.AccessControlAllowOrigin, o)
}
w.Header().Set(api.AccessControlAllowMethods, strings.Join(rule.AllowedMethods, ", "))
return
}
}
}
}
}
}
func (h *handler) Preflight(w http.ResponseWriter, r *http.Request) {
reqInfo := api.GetReqInfo(r.Context())
bktInfo, err := h.obj.GetBucketInfo(r.Context(), reqInfo.BucketName)
if err != nil {
h.logAndSendError(w, "could not get bucket info", reqInfo, err)
return
}
origin := r.Header.Get(api.Origin)
if origin == "" {
h.logAndSendError(w, "origin request header needed", reqInfo, errors.GetAPIError(errors.ErrBadRequest))
}
method := r.Header.Get(api.AccessControlRequestMethod)
if method == "" {
h.logAndSendError(w, "Access-Control-Request-Method request header needed", reqInfo, errors.GetAPIError(errors.ErrBadRequest))
return
}
var headers []string
requestHeaders := r.Header.Get(api.AccessControlRequestHeaders)
if requestHeaders != "" {
headers = strings.Split(requestHeaders, ", ")
}
cors, err := h.obj.GetBucketCORS(r.Context(), bktInfo)
if err != nil {
h.logAndSendError(w, "could not get cors", reqInfo, err)
return
}
for _, rule := range cors.CORSRules {
for _, o := range rule.AllowedOrigins {
if o == origin || o == wildcard {
for _, m := range rule.AllowedMethods {
if m == method {
if !checkSubslice(rule.AllowedHeaders, headers) {
continue
}
w.Header().Set(api.AccessControlAllowOrigin, o)
w.Header().Set(api.AccessControlAllowMethods, strings.Join(rule.AllowedMethods, ", "))
if headers != nil {
w.Header().Set(api.AccessControlAllowHeaders, requestHeaders)
}
if rule.ExposeHeaders != nil {
w.Header().Set(api.AccessControlExposeHeaders, strings.Join(rule.ExposeHeaders, ", "))
}
if rule.MaxAgeSeconds > 0 || rule.MaxAgeSeconds == -1 {
w.Header().Set(api.AccessControlMaxAge, strconv.Itoa(rule.MaxAgeSeconds))
} else {
w.Header().Set(api.AccessControlMaxAge, strconv.Itoa(h.cfg.DefaultMaxAge))
}
if o != wildcard {
w.Header().Set(api.AccessControlAllowCredentials, "true")
}
api.WriteSuccessResponseHeadersOnly(w)
return
}
}
}
}
}
h.logAndSendError(w, "Forbidden", reqInfo, errors.GetAPIError(errors.ErrAccessDenied))
}
func checkSubslice(slice []string, subSlice []string) bool {
if sliceContains(slice, wildcard) {
return true
}
if len(subSlice) > len(slice) {
return false
}
for _, r := range subSlice {
if !sliceContains(slice, r) {
return false
}
}
return true
}
func sliceContains(slice []string, str string) bool {
for _, s := range slice {
if s == str {
return true
}
}
return false
}