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option.go
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option.go
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// Copyright 2023 CloudWeGo Authors
//
// 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 etag
import (
"context"
"github.com/cloudwego/hertz/pkg/app"
)
type Option func(o *Options)
type Options struct {
weak bool
next NextFunc
generator Generator
}
type (
NextFunc func(ctx context.Context, c *app.RequestContext) bool
Generator func(ctx context.Context, c *app.RequestContext) []byte
)
var defaultOptions = Options{
weak: false,
next: nil,
generator: nil,
}
func newOptions(opts ...Option) *Options {
options := &Options{
weak: defaultOptions.weak,
next: defaultOptions.next,
generator: defaultOptions.generator,
}
options.apply(opts)
return options
}
func (o *Options) apply(opts []Option) {
for _, opt := range opts {
opt(o)
}
}
// WithWeak will add weak prefix to the front of etag
func WithWeak() Option {
return func(o *Options) {
o.weak = true
}
}
// WithNext will skip etag middleware when return is true
func WithNext(next NextFunc) Option {
return func(o *Options) {
o.next = next
}
}
// WithGenerator will replace default etag generation with yours
// Note: you should not add a weak prefix to your custom etag when used with WithWeak
func WithGenerator(gen Generator) Option {
return func(o *Options) {
o.generator = gen
}
}