/
handler.go
66 lines (56 loc) · 1.53 KB
/
handler.go
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package error
import (
"fmt"
"github.com/gin-gonic/gin"
"net/http"
"strings"
"unicode"
"github.com/gotify/server/model"
"gopkg.in/go-playground/validator.v8"
)
// Handler creates a gin middleware for handling errors.
func Handler() gin.HandlerFunc {
return func(c *gin.Context) {
c.Next()
if len(c.Errors) > 0 {
for _, e := range c.Errors {
switch e.Type {
case gin.ErrorTypeBind:
errs, ok := e.Err.(validator.ValidationErrors)
if !ok {
writeError(c, e.Error())
return
}
var stringErrors []string
for _, err := range errs {
stringErrors = append(stringErrors, validationErrorToText(err))
}
writeError(c, strings.Join(stringErrors, "; "))
default:
writeError(c, e.Err.Error())
}
}
}
}
}
func validationErrorToText(e *validator.FieldError) string {
runes := []rune(e.Field)
runes[0] = unicode.ToLower(runes[0])
fieldName := string(runes)
switch e.Tag {
case "required":
return fmt.Sprintf("Field '%s' is required", fieldName)
case "max":
return fmt.Sprintf("Field '%s' must be less or equal to %s", fieldName, e.Param)
case "min":
return fmt.Sprintf("Field '%s' must be more or equal to %s", fieldName, e.Param)
}
return fmt.Sprintf("Field '%s' is not valid", fieldName)
}
func writeError(ctx *gin.Context, errString string) {
status := http.StatusBadRequest
if ctx.Writer.Status() != http.StatusOK {
status = ctx.Writer.Status()
}
ctx.JSON(status, &model.Error{Error: http.StatusText(status), ErrorCode: status, ErrorDescription: errString})
}