mirror of
https://github.com/dutchcoders/transfer.sh.git
synced 2020-11-18 19:53:40 -08:00
100 lines
2.4 KiB
Go
100 lines
2.4 KiB
Go
// Copyright 2015 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 ipauth provides a martian.Modifier that sets auth based on IP.
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package ipauth
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import (
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"net"
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"net/http"
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"github.com/google/martian"
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"github.com/google/martian/auth"
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)
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var noop = martian.Noop("ipauth.Modifier")
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// Modifier is the IP authentication modifier.
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type Modifier struct {
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reqmod martian.RequestModifier
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resmod martian.ResponseModifier
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}
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// NewModifier returns a new IP authentication modifier.
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func NewModifier() *Modifier {
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return &Modifier{
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reqmod: noop,
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resmod: noop,
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}
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}
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// SetRequestModifier sets the request modifier.
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func (m *Modifier) SetRequestModifier(reqmod martian.RequestModifier) {
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if reqmod == nil {
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reqmod = noop
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}
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m.reqmod = reqmod
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}
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// SetResponseModifier sets the response modifier.
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func (m *Modifier) SetResponseModifier(resmod martian.ResponseModifier) {
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if resmod == nil {
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resmod = noop
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}
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m.resmod = resmod
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}
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// ModifyRequest sets the auth ID in the context from the request iff it has
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// not already been set and runs reqmod.ModifyRequest. If the underlying
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// modifier has indicated via auth error that no valid auth credentials
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// have been found we set ctx.SkipRoundTrip.
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func (m *Modifier) ModifyRequest(req *http.Request) error {
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ctx := martian.NewContext(req)
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actx := auth.FromContext(ctx)
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ip, _, err := net.SplitHostPort(req.RemoteAddr)
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if err != nil {
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ip = req.RemoteAddr
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}
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actx.SetID(ip)
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err = m.reqmod.ModifyRequest(req)
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if actx.Error() != nil {
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ctx.SkipRoundTrip()
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}
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return err
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}
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// ModifyResponse runs resmod.ModifyResponse.
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//
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// If an error is returned from resmod.ModifyResponse it is returned.
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func (m *Modifier) ModifyResponse(res *http.Response) error {
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ctx := martian.NewContext(res.Request)
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actx := auth.FromContext(ctx)
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err := m.resmod.ModifyResponse(res)
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if actx.Error() != nil {
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res.StatusCode = 403
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res.Status = http.StatusText(403)
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}
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return err
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}
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