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healthz.go
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healthz.go
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// Copyright 2023 sigma
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package middlewares
import (
"net/http"
"github.com/labstack/echo/v4"
"github.com/go-sigma/sigma/pkg/xerrors"
)
// Resource something that need be health checked
type Resource interface {
HealthCheck() error // returns error if health check no passed
}
// Healthz create a health check middleware
func Healthz(rs ...Resource) echo.MiddlewareFunc {
return func(next echo.HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) error {
if c.Request().URL.Path == "/healthz" && c.Request().Method == http.MethodGet {
for _, r := range rs {
if err := r.HealthCheck(); err != nil {
return xerrors.NewHTTPError(c, xerrors.HTTPErrCodeInternalError, err.Error())
}
}
return c.String(http.StatusOK, "OK")
}
return next(c)
}
}
}