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handler_utilities.go
58 lines (48 loc) · 1.16 KB
/
handler_utilities.go
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package loremsvc
import (
"bytes"
"encoding/json"
"golang.org/x/net/context"
"google.golang.org/appengine/log"
"net/http"
)
func decode(r *http.Request, v interface{}) error {
err := json.NewDecoder(r.Body).Decode(v)
if err != nil {
return err
}
if valid, ok := v.(interface {
OK() error
}); ok {
err = valid.OK()
if err != nil {
return err
}
}
return nil
}
func respond(ctx context.Context, w http.ResponseWriter, r *http.Request, v interface{}, code int) {
var buf bytes.Buffer
err := json.NewEncoder(&buf).Encode(v)
if err != nil {
respondErr(ctx, w, r, err, http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json; charset=utf-8")
w.WriteHeader(code)
_, err = buf.WriteTo(w)
if err != nil {
log.Errorf(ctx, "respond: %s", err)
}
}
func respondErr(ctx context.Context, w http.ResponseWriter, r *http.Request, err error, code int) {
errObj := struct {
Error string `json:"error"`
}{Error: err.Error()}
w.Header().Set("Content-Type", "application/json; charset=utf-8")
w.WriteHeader(code)
err = json.NewEncoder(w).Encode(errObj)
if err != nil {
log.Errorf(ctx, "respondErr: %s", err)
}
}