-
Notifications
You must be signed in to change notification settings - Fork 0
/
http.go
289 lines (263 loc) · 7.64 KB
/
http.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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
package auth
import (
"encoding/json"
"errors"
"fmt"
"net/http"
"strings"
"time"
"github.com/go-chi/chi"
)
//UserLoginHandler is an access layer for user-related operations
type UserLoginHandler interface {
Login(string, string) (string, error)
}
type UserLogoutHandler interface {
Logout(User) error
}
type UserReader interface {
GetUser(string, *User) error
GetAllUsers() ([]*User, error)
}
type UserWriter interface {
CreateUser(User) error
}
type TokenGenerator interface {
GenerateUserToken(owner, description string, scope Scope, expires time.Time) (Token, error)
}
type TokenRemover interface {
DeleteUserToken(id string, u *User) error
}
type TokenReader interface {
GetUserTokens(string) ([]Token, error)
}
type UserReadWriter interface {
UserReader
UserWriter
}
type TokenValidator interface {
ValidateToken(token string, user *User, claims *Claims, update bool) (string, error)
}
// Err is a json error wrapper
type Err struct {
Error string `json:"error"`
}
func jsonErr(msg string) Err {
return Err{Error: msg}
}
func jsonErrf(msg string, args ...interface{}) Err {
return Err{Error: fmt.Sprintf(msg, args...)}
}
func parseAuthorizationHeader(r *http.Request) string {
h := r.Header.Get("Authorization")
if !strings.HasPrefix(h, "Bearer ") {
return ""
}
return strings.TrimPrefix(h, "Bearer ")
}
func Middleware(validator TokenValidator) func(http.Handler) http.Handler {
return func(next http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
token := strings.TrimPrefix(r.URL.Query().Get("token"), "Bearer ")
if token == "" {
token = parseAuthorizationHeader(r)
}
if token == "" {
renderJSON(w, http.StatusUnauthorized, jsonErr("authorization bearer token not present"))
return
}
u := newUser()
defer returnUser(u)
cs := newClaims()
defer returnClaims(cs)
token, err := validator.ValidateToken(token, u, cs, r.Header.Get("X-Auth-Renew") == "1")
if err != nil {
renderJSON(w, http.StatusUnauthorized, jsonErrf("invalid token: %v", err))
return
}
w.Header().Set("Authorization", fmt.Sprintf("Bearer %s", token))
next.ServeHTTP(w, r.WithContext(WithContext(r.Context(), u, cs)))
}
return http.HandlerFunc(fn)
}
}
func LogoutHandler(auth UserLogoutHandler) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
u := ContextUser(r.Context())
if u == nil {
// we consider the user to be already logged out
w.WriteHeader(http.StatusOK)
return
}
err := auth.Logout(*u)
if err != nil {
renderJSON(w, http.StatusInternalServerError, jsonErrf("unexpected error: %v", err))
return
}
w.WriteHeader(http.StatusOK)
}
}
func LoginHandler(auth UserLoginHandler) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
var req struct {
Username string `json:"username"`
Password string `json:"password"`
}
err := json.NewDecoder(r.Body).Decode(&req)
if err != nil {
renderJSON(w, http.StatusBadRequest, jsonErrf("could not decode request: %v", err))
return
}
token, err := auth.Login(req.Username, req.Password)
if err != nil {
switch {
case errors.Is(err, ErrWrongUserPass):
renderJSON(w, http.StatusUnauthorized, jsonErr("wrong username or password"))
case errors.Is(err, ErrNotFound):
renderJSON(w, http.StatusUnauthorized, jsonErr("wrong username or password"))
default:
renderJSON(w, http.StatusInternalServerError, jsonErrf("unexpected error: %v", err))
}
return
}
w.Header().Set("Authorization", fmt.Sprintf("Bearer %s", token))
w.WriteHeader(http.StatusOK)
}
}
func GetAllUsersHandler(reader UserReader, access Scope) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
u := ContextUser(r.Context())
if !u.Scope.Is(access) {
renderJSON(w, http.StatusUnauthorized, jsonErr("operation unauthorized"))
}
users, err := reader.GetAllUsers()
if err != nil {
renderJSON(w, http.StatusInternalServerError, jsonErrf("could not fetch users: %v", err))
return
}
renderJSON(w, http.StatusOK, users)
}
}
func CreateUserHandler(writer UserWriter, access Scope) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
u := ContextUser(r.Context())
if !u.Scope.Is(access) {
renderJSON(w, http.StatusUnauthorized, jsonErr("operation unauthorized"))
return
}
var usr User
err := json.NewDecoder(r.Body).Decode(&usr)
if err != nil {
renderJSON(w, http.StatusBadRequest, jsonErrf("could not decode request: %v", err))
return
}
err = usr.Validate()
if err != nil {
renderJSON(w, http.StatusBadRequest, err)
return
}
err = writer.CreateUser(usr)
if err != nil {
switch {
case errors.Is(err, ErrExists):
renderJSON(w, http.StatusConflict, jsonErr("user already exists"))
default:
renderJSON(w, http.StatusInternalServerError, jsonErrf("unexpected error: %v", err))
}
return
}
renderJSON(w, http.StatusOK, usr)
}
}
func GetUserTokens(reader TokenReader) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
u := ContextUser(r.Context())
tokens, err := reader.GetUserTokens(u.ID)
if err != nil {
renderJSON(w, http.StatusInternalServerError, jsonErrf("unexpected error: %v", err))
return
}
renderJSON(w, http.StatusOK, tokens)
}
}
func GenerateUserTokenHandler(writer TokenGenerator) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
u := ContextUser(r.Context())
var req struct {
Description string `json:"description"`
Scope int `json:"scope"`
ExpiresAt time.Time `json:"expires_at"`
}
err := json.NewDecoder(r.Body).Decode(&req)
if err != nil {
renderJSON(w, http.StatusBadRequest, jsonErrf("could not decode request: %v", err))
return
}
token, err := writer.GenerateUserToken(u.ID, req.Description, Scope(req.Scope), req.ExpiresAt)
if err != nil {
renderJSON(w, http.StatusInternalServerError, jsonErrf("unexpected error: %v", err))
return
}
resp := struct {
Token
Value string `json:"value"`
}{Token: token, Value: token.Token}
renderJSON(w, http.StatusOK, resp)
}
}
func DeleteUserToken(store TokenRemover) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
u := ContextUser(r.Context())
id := chi.URLParam(r, "id")
err := store.DeleteUserToken(id, u)
if err != nil {
renderJSON(w, http.StatusInternalServerError, jsonErrf("unexpected error: %v", err))
return
}
w.WriteHeader(http.StatusNoContent)
}
}
type CheckRequest struct {
Token string `json:"token"`
Update bool `json:"update"`
}
func CheckTokenHandler(validator TokenValidator) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
if r.Body == nil {
renderJSON(w, http.StatusBadRequest, jsonErr("could not decode request: empty body"))
return
}
var req CheckRequest
err := json.NewDecoder(r.Body).Decode(&req)
if err != nil {
renderJSON(w, http.StatusBadRequest, jsonErrf("could not decode request: %v", err))
return
}
cs := newClaims()
defer returnClaims(cs)
u := newUser()
defer returnUser(u)
token, err := validator.ValidateToken(req.Token, u, cs, req.Update)
if err != nil {
renderJSON(w, http.StatusUnauthorized, jsonErrf("invalid token: %v", err))
return
}
renderJSON(w, http.StatusOK, struct {
Token string `json:"token"`
Claims *Claims `json:"claims"`
}{
Token: token,
Claims: cs,
})
}
}
func renderJSON(w http.ResponseWriter, status int, res interface{}) {
data, err := json.Marshal(res)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
_, _ = w.Write([]byte(err.Error()))
}
w.Header().Add("Content-Type", "application/json")
w.WriteHeader(status)
_, _ = w.Write(data)
}