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
|
package api
import (
"context"
"encoding/json"
"net/http"
)
//Wrap API handler and returns standard http.HandlerFunc function
func Wrap[RQ any, RS any](handler func(ctx context.Context, request *RQ) (RS, error)) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
req := new(RQ)
richifyRequest(req, r)
switch r.Method {
case http.MethodPost, http.MethodPatch, http.MethodDelete, http.MethodPut:
if err := json.NewDecoder(r.Body).Decode(req); err != nil {
w.WriteHeader(http.StatusBadRequest)
_, _ = w.Write([]byte(err.Error()))
return
}
}
resp, err := handler(r.Context(), req)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
_, _ = w.Write([]byte(err.Error()))
return
}
if err := json.NewEncoder(w).Encode(resp); err != nil {
w.WriteHeader(http.StatusInternalServerError)
_, _ = w.Write([]byte(err.Error()))
return
}
}
}
func richifyRequest[RQ any](req *RQ, baseRequest *http.Request) {
if v, ok := (any)(req).(WithHeader); ok {
v.WithHeader(baseRequest.Header)
}
if v, ok := (any)(req).(WithMethod); ok {
v.WithMethod(baseRequest.Method)
}
}
type WithHeader interface {
WithHeader(header http.Header)
}
type WithMethod interface {
WithMethod(method string)
}
|
