You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
91 lines
1.9 KiB
91 lines
1.9 KiB
package api
|
|
|
|
import (
|
|
"context"
|
|
"crypto/rand"
|
|
"encoding/hex"
|
|
"encoding/json"
|
|
"errors"
|
|
"fmt"
|
|
"net/http"
|
|
"strconv"
|
|
|
|
"github.com/mediocregopher/mediocre-go-lib/v2/mlog"
|
|
)
|
|
|
|
type loggerCtxKey int
|
|
|
|
func setRequestLogger(r *http.Request, logger *mlog.Logger) *http.Request {
|
|
ctx := r.Context()
|
|
ctx = context.WithValue(ctx, loggerCtxKey(0), logger)
|
|
return r.WithContext(ctx)
|
|
}
|
|
|
|
func getRequestLogger(r *http.Request) *mlog.Logger {
|
|
ctx := r.Context()
|
|
logger, _ := ctx.Value(loggerCtxKey(0)).(*mlog.Logger)
|
|
if logger == nil {
|
|
logger = mlog.Null
|
|
}
|
|
return logger
|
|
}
|
|
|
|
func jsonResult(rw http.ResponseWriter, r *http.Request, v interface{}) {
|
|
b, err := json.Marshal(v)
|
|
if err != nil {
|
|
internalServerError(rw, r, err)
|
|
return
|
|
}
|
|
b = append(b, '\n')
|
|
|
|
rw.Header().Set("Content-Type", "application/json")
|
|
rw.Write(b)
|
|
}
|
|
|
|
func badRequest(rw http.ResponseWriter, r *http.Request, err error) {
|
|
getRequestLogger(r).Warn(r.Context(), "bad request", err)
|
|
|
|
rw.WriteHeader(400)
|
|
jsonResult(rw, r, struct {
|
|
Error string `json:"error"`
|
|
}{
|
|
Error: err.Error(),
|
|
})
|
|
}
|
|
|
|
func internalServerError(rw http.ResponseWriter, r *http.Request, err error) {
|
|
getRequestLogger(r).Error(r.Context(), "internal server error", err)
|
|
|
|
rw.WriteHeader(500)
|
|
jsonResult(rw, r, struct {
|
|
Error string `json:"error"`
|
|
}{
|
|
Error: "internal server error",
|
|
})
|
|
}
|
|
|
|
func strToInt(str string, defaultVal int) (int, error) {
|
|
if str == "" {
|
|
return defaultVal, nil
|
|
}
|
|
return strconv.Atoi(str)
|
|
}
|
|
|
|
func getCookie(r *http.Request, cookieName, defaultVal string) (string, error) {
|
|
c, err := r.Cookie(cookieName)
|
|
if errors.Is(err, http.ErrNoCookie) {
|
|
return defaultVal, nil
|
|
} else if err != nil {
|
|
return "", fmt.Errorf("reading cookie %q: %w", cookieName, err)
|
|
}
|
|
|
|
return c.Value, nil
|
|
}
|
|
|
|
func randStr(numBytesEntropy int) string {
|
|
b := make([]byte, numBytesEntropy)
|
|
if _, err := rand.Read(b); err != nil {
|
|
panic(err)
|
|
}
|
|
return hex.EncodeToString(b)
|
|
}
|
|
|