/
recovery.go
64 lines (55 loc) · 1.49 KB
/
recovery.go
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package recovery
import (
"context"
"runtime"
"github.com/go-kratos/kratos/v2/errors"
"github.com/go-kratos/kratos/v2/log"
"github.com/go-kratos/kratos/v2/middleware"
)
// HandlerFunc is recovery handler func.
type HandlerFunc func(ctx context.Context, req, err interface{}) error
// Option is recovery option.
type Option func(*options)
type options struct {
handler HandlerFunc
logger log.Logger
}
// WithHandler with recovery handler.
func WithHandler(h HandlerFunc) Option {
return func(o *options) {
o.handler = h
}
}
// WithLogger with recovery logger.
func WithLogger(logger log.Logger) Option {
return func(o *options) {
o.logger = logger
}
}
// Recovery is a server middleware that recovers from any panics.
func Recovery(opts ...Option) middleware.Middleware {
options := options{
logger: log.DefaultLogger,
handler: func(ctx context.Context, req, err interface{}) error {
return errors.Unknown("Unknown", "panic triggered: %v", err)
},
}
for _, o := range opts {
o(&options)
}
log := log.NewHelper("middleware/recovery", log.DefaultLogger)
return func(handler middleware.Handler) middleware.Handler {
return func(ctx context.Context, req interface{}) (reply interface{}, err error) {
defer func() {
if rerr := recover(); rerr != nil {
buf := make([]byte, 64<<10)
n := runtime.Stack(buf, false)
buf = buf[:n]
log.Errorf("%v: %+v\n%s\n", rerr, req, buf)
err = options.handler(ctx, req, rerr)
}
}()
return handler(ctx, req)
}
}
}