-
Notifications
You must be signed in to change notification settings - Fork 19
/
response_writer.go
109 lines (94 loc) · 3.43 KB
/
response_writer.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
// Copyright (C) 2023 Gobalsky Labs Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package v2
import (
"encoding/json"
"net/http"
"code.vegaprotocol.io/vega/libs/jsonrpc"
)
// responseWriter is a wrapper used to easily track response information written
// to the HTTP response writer, without polluting the handler's code.
type responseWriter struct {
writer http.ResponseWriter
// traceID holds a unique identifier of the incoming request. It's used to
// trace everything related to that request. It's used on a "technical"
// level for tracing the request through multiple components, and services.
// It shouldn't be confused with the requestID that is an optional
// identifier set by the client.
traceID string
// statusCode holds the latest status code set on the writer.
statusCode int
// internalError holds the error that came up during processing of the
// request or the response.
internalError error
// response holds the body of the response.
response []byte
// requestID is the identifier the client set in the request. It's used by
// the client to track its requests. This identifier can be empty. It
// shouldn't be confused with the traceID.
requestID string
}
func (lw *responseWriter) SetStatusCode(statusCode int) {
lw.statusCode = statusCode
lw.writer.WriteHeader(statusCode)
if lw.statusCode == 401 {
lw.writer.Header().Set("WWW-Authenticate", "VWT")
}
}
func (lw *responseWriter) SetAuthorization(vwt VWT) {
lw.writer.Header().Set("Authorization", vwt.String())
lw.writer.Header().Set("Access-Control-Allow-Headers", "Authorization")
lw.writer.Header().Set("Access-Control-Expose-Headers", "Authorization")
}
func (lw *responseWriter) WriteHTTPResponse(response *Response) {
lw.writer.Header().Set("Content-Type", "application/json")
marshaledResponse, err := json.Marshal(response)
if err != nil {
lw.SetStatusCode(http.StatusInternalServerError)
lw.response = nil
lw.internalError = err
return
}
if _, err = lw.writer.Write(marshaledResponse); err != nil {
lw.SetStatusCode(http.StatusInternalServerError)
lw.response = nil
lw.internalError = err
return
}
}
func (lw *responseWriter) WriteJSONRPCResponse(response *jsonrpc.Response) {
lw.requestID = response.ID
lw.writer.Header().Set("Content-Type", "application/json-rpc")
marshaledResponse, err := json.Marshal(response)
if err != nil {
lw.SetStatusCode(http.StatusInternalServerError)
lw.response = nil
lw.internalError = err
return
}
if _, err = lw.writer.Write(marshaledResponse); err != nil {
lw.SetStatusCode(http.StatusInternalServerError)
lw.response = nil
lw.internalError = err
return
}
}
func newResponseWriter(writer http.ResponseWriter, traceID string) *responseWriter {
writer.Header().Set("Content-Type", "application/json")
return &responseWriter{
writer: writer,
traceID: traceID,
}
}