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// Copyright 2015 Google Inc. All rights reserved.
//
// 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 skip provides a request modifier to skip the HTTP round-trip.
package skip
import (
"encoding/json"
"net/http"
"github.com/google/martian/v3"
"github.com/google/martian/v3/parse"
)
// RoundTrip is a modifier that skips the request round-trip.
type RoundTrip struct{}
type roundTripJSON struct {
Scope []parse.ModifierType `json:"scope"`
}
func init() {
parse.Register("skip.RoundTrip", roundTripFromJSON)
}
// NewRoundTrip returns a new modifier that skips round-trip.
func NewRoundTrip() *RoundTrip {
return &RoundTrip{}
}
// ModifyRequest skips the request round-trip.
func (r *RoundTrip) ModifyRequest(req *http.Request) error {
ctx := martian.NewContext(req)
ctx.SkipRoundTrip()
return nil
}
// roundTripFromJSON builds a skip.RoundTrip from JSON.
// Example JSON:
// {
// "skip.RoundTrip": { }
// }
func roundTripFromJSON(b []byte) (*parse.Result, error) {
msg := &roundTripJSON{}
if err := json.Unmarshal(b, msg); err != nil {
return nil, err
}
return parse.NewResult(NewRoundTrip(), msg.Scope)
}
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