mirror of
https://github.com/dutchcoders/transfer.sh.git
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98 lines
2.7 KiB
Go
98 lines
2.7 KiB
Go
// Copyright 2017 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package failure provides a verifier that always fails, adding a given message
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// to the multierror log. This can be used to turn any filter in to a defacto
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// verifier, by wrapping it in a filter and thus causing a verifier failure whenever
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// a request passes the filter.
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package failure
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"github.com/google/martian"
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"github.com/google/martian/parse"
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"github.com/google/martian/verify"
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)
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func init() {
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parse.Register("failure.Verifier", verifierFromJSON)
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}
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type verifier struct {
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message string
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merr *martian.MultiError
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}
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type verifierJSON struct {
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Message string `json:"message"`
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Scope []parse.ModifierType `json:"scope"`
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}
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// NewVerifier returns a new failing verifier.
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func NewVerifier(message string) (verify.RequestVerifier, error) {
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return &verifier{
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message: message,
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merr: martian.NewMultiError(),
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}, nil
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}
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// ModifyRequest adds an error message containing the message field in the verifier to the verifier errors.
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// This means that any time a request hits the verifier it's treated as an error.
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func (v *verifier) ModifyRequest(req *http.Request) error {
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err := fmt.Errorf("request(%v) verification error: %s", req.URL, v.message)
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v.merr.Add(err)
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return nil
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}
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// VerifyRequests returns an error if any requests have hit the verifier.
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// If an error is returned it will be of type *martian.MultiError.
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func (v *verifier) VerifyRequests() error {
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if v.merr.Empty() {
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return nil
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}
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return v.merr
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}
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// ResetRequestVerifications clears all failed request verifications.
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func (v *verifier) ResetRequestVerifications() {
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v.merr = martian.NewMultiError()
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}
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// verifierFromJSON builds a failure.Verifier from JSON
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//
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// Example JSON:
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// {
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// "failure.Verifier": {
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// "scope": ["request", "response"],
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// "message": "Request passed a filter it should not have"
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// }
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// }
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func verifierFromJSON(b []byte) (*parse.Result, error) {
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msg := &verifierJSON{}
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if err := json.Unmarshal(b, msg); err != nil {
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return nil, err
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}
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v, err := NewVerifier(msg.Message)
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if err != nil {
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return nil, err
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}
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return parse.NewResult(v, msg.Scope)
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}
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