mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-21 20:40:20 +00:00
425 lines
13 KiB
Go
425 lines
13 KiB
Go
/*
|
|
Copyright 2015 The Kubernetes 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 transport
|
|
|
|
import (
|
|
"fmt"
|
|
"net/http"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/golang/glog"
|
|
|
|
utilnet "k8s.io/apimachinery/pkg/util/net"
|
|
)
|
|
|
|
// HTTPWrappersForConfig wraps a round tripper with any relevant layered
|
|
// behavior from the config. Exposed to allow more clients that need HTTP-like
|
|
// behavior but then must hijack the underlying connection (like WebSocket or
|
|
// HTTP2 clients). Pure HTTP clients should use the RoundTripper returned from
|
|
// New.
|
|
func HTTPWrappersForConfig(config *Config, rt http.RoundTripper) (http.RoundTripper, error) {
|
|
if config.WrapTransport != nil {
|
|
rt = config.WrapTransport(rt)
|
|
}
|
|
|
|
rt = DebugWrappers(rt)
|
|
|
|
// Set authentication wrappers
|
|
switch {
|
|
case config.HasBasicAuth() && config.HasTokenAuth():
|
|
return nil, fmt.Errorf("username/password or bearer token may be set, but not both")
|
|
case config.HasTokenAuth():
|
|
rt = NewBearerAuthRoundTripper(config.BearerToken, rt)
|
|
case config.HasBasicAuth():
|
|
rt = NewBasicAuthRoundTripper(config.Username, config.Password, rt)
|
|
}
|
|
if len(config.UserAgent) > 0 {
|
|
rt = NewUserAgentRoundTripper(config.UserAgent, rt)
|
|
}
|
|
if len(config.Impersonate.UserName) > 0 ||
|
|
len(config.Impersonate.Groups) > 0 ||
|
|
len(config.Impersonate.Extra) > 0 {
|
|
rt = NewImpersonatingRoundTripper(config.Impersonate, rt)
|
|
}
|
|
return rt, nil
|
|
}
|
|
|
|
// DebugWrappers wraps a round tripper and logs based on the current log level.
|
|
func DebugWrappers(rt http.RoundTripper) http.RoundTripper {
|
|
switch {
|
|
case bool(glog.V(9)):
|
|
rt = newDebuggingRoundTripper(rt, debugCurlCommand, debugURLTiming, debugResponseHeaders)
|
|
case bool(glog.V(8)):
|
|
rt = newDebuggingRoundTripper(rt, debugJustURL, debugRequestHeaders, debugResponseStatus, debugResponseHeaders)
|
|
case bool(glog.V(7)):
|
|
rt = newDebuggingRoundTripper(rt, debugJustURL, debugRequestHeaders, debugResponseStatus)
|
|
case bool(glog.V(6)):
|
|
rt = newDebuggingRoundTripper(rt, debugURLTiming)
|
|
}
|
|
|
|
return rt
|
|
}
|
|
|
|
type requestCanceler interface {
|
|
CancelRequest(*http.Request)
|
|
}
|
|
|
|
type authProxyRoundTripper struct {
|
|
username string
|
|
groups []string
|
|
extra map[string][]string
|
|
|
|
rt http.RoundTripper
|
|
}
|
|
|
|
// NewAuthProxyRoundTripper provides a roundtripper which will add auth proxy fields to requests for
|
|
// authentication terminating proxy cases
|
|
// assuming you pull the user from the context:
|
|
// username is the user.Info.GetName() of the user
|
|
// groups is the user.Info.GetGroups() of the user
|
|
// extra is the user.Info.GetExtra() of the user
|
|
// extra can contain any additional information that the authenticator
|
|
// thought was interesting, for example authorization scopes.
|
|
// In order to faithfully round-trip through an impersonation flow, these keys
|
|
// MUST be lowercase.
|
|
func NewAuthProxyRoundTripper(username string, groups []string, extra map[string][]string, rt http.RoundTripper) http.RoundTripper {
|
|
return &authProxyRoundTripper{
|
|
username: username,
|
|
groups: groups,
|
|
extra: extra,
|
|
rt: rt,
|
|
}
|
|
}
|
|
|
|
func (rt *authProxyRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
|
|
req = utilnet.CloneRequest(req)
|
|
SetAuthProxyHeaders(req, rt.username, rt.groups, rt.extra)
|
|
|
|
return rt.rt.RoundTrip(req)
|
|
}
|
|
|
|
// SetAuthProxyHeaders stomps the auth proxy header fields. It mutates its argument.
|
|
func SetAuthProxyHeaders(req *http.Request, username string, groups []string, extra map[string][]string) {
|
|
req.Header.Del("X-Remote-User")
|
|
req.Header.Del("X-Remote-Group")
|
|
for key := range req.Header {
|
|
if strings.HasPrefix(strings.ToLower(key), strings.ToLower("X-Remote-Extra-")) {
|
|
req.Header.Del(key)
|
|
}
|
|
}
|
|
|
|
req.Header.Set("X-Remote-User", username)
|
|
for _, group := range groups {
|
|
req.Header.Add("X-Remote-Group", group)
|
|
}
|
|
for key, values := range extra {
|
|
for _, value := range values {
|
|
req.Header.Add("X-Remote-Extra-"+key, value)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (rt *authProxyRoundTripper) CancelRequest(req *http.Request) {
|
|
if canceler, ok := rt.rt.(requestCanceler); ok {
|
|
canceler.CancelRequest(req)
|
|
} else {
|
|
glog.Errorf("CancelRequest not implemented")
|
|
}
|
|
}
|
|
|
|
func (rt *authProxyRoundTripper) WrappedRoundTripper() http.RoundTripper { return rt.rt }
|
|
|
|
type userAgentRoundTripper struct {
|
|
agent string
|
|
rt http.RoundTripper
|
|
}
|
|
|
|
func NewUserAgentRoundTripper(agent string, rt http.RoundTripper) http.RoundTripper {
|
|
return &userAgentRoundTripper{agent, rt}
|
|
}
|
|
|
|
func (rt *userAgentRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
|
|
if len(req.Header.Get("User-Agent")) != 0 {
|
|
return rt.rt.RoundTrip(req)
|
|
}
|
|
req = utilnet.CloneRequest(req)
|
|
req.Header.Set("User-Agent", rt.agent)
|
|
return rt.rt.RoundTrip(req)
|
|
}
|
|
|
|
func (rt *userAgentRoundTripper) CancelRequest(req *http.Request) {
|
|
if canceler, ok := rt.rt.(requestCanceler); ok {
|
|
canceler.CancelRequest(req)
|
|
} else {
|
|
glog.Errorf("CancelRequest not implemented")
|
|
}
|
|
}
|
|
|
|
func (rt *userAgentRoundTripper) WrappedRoundTripper() http.RoundTripper { return rt.rt }
|
|
|
|
type basicAuthRoundTripper struct {
|
|
username string
|
|
password string
|
|
rt http.RoundTripper
|
|
}
|
|
|
|
// NewBasicAuthRoundTripper will apply a BASIC auth authorization header to a
|
|
// request unless it has already been set.
|
|
func NewBasicAuthRoundTripper(username, password string, rt http.RoundTripper) http.RoundTripper {
|
|
return &basicAuthRoundTripper{username, password, rt}
|
|
}
|
|
|
|
func (rt *basicAuthRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
|
|
if len(req.Header.Get("Authorization")) != 0 {
|
|
return rt.rt.RoundTrip(req)
|
|
}
|
|
req = utilnet.CloneRequest(req)
|
|
req.SetBasicAuth(rt.username, rt.password)
|
|
return rt.rt.RoundTrip(req)
|
|
}
|
|
|
|
func (rt *basicAuthRoundTripper) CancelRequest(req *http.Request) {
|
|
if canceler, ok := rt.rt.(requestCanceler); ok {
|
|
canceler.CancelRequest(req)
|
|
} else {
|
|
glog.Errorf("CancelRequest not implemented")
|
|
}
|
|
}
|
|
|
|
func (rt *basicAuthRoundTripper) WrappedRoundTripper() http.RoundTripper { return rt.rt }
|
|
|
|
// These correspond to the headers used in pkg/apis/authentication. We don't want the package dependency,
|
|
// but you must not change the values.
|
|
const (
|
|
// ImpersonateUserHeader is used to impersonate a particular user during an API server request
|
|
ImpersonateUserHeader = "Impersonate-User"
|
|
|
|
// ImpersonateGroupHeader is used to impersonate a particular group during an API server request.
|
|
// It can be repeated multiplied times for multiple groups.
|
|
ImpersonateGroupHeader = "Impersonate-Group"
|
|
|
|
// ImpersonateUserExtraHeaderPrefix is a prefix for a header used to impersonate an entry in the
|
|
// extra map[string][]string for user.Info. The key for the `extra` map is suffix.
|
|
// The same key can be repeated multiple times to have multiple elements in the slice under a single key.
|
|
// For instance:
|
|
// Impersonate-Extra-Foo: one
|
|
// Impersonate-Extra-Foo: two
|
|
// results in extra["Foo"] = []string{"one", "two"}
|
|
ImpersonateUserExtraHeaderPrefix = "Impersonate-Extra-"
|
|
)
|
|
|
|
type impersonatingRoundTripper struct {
|
|
impersonate ImpersonationConfig
|
|
delegate http.RoundTripper
|
|
}
|
|
|
|
// NewImpersonatingRoundTripper will add an Act-As header to a request unless it has already been set.
|
|
func NewImpersonatingRoundTripper(impersonate ImpersonationConfig, delegate http.RoundTripper) http.RoundTripper {
|
|
return &impersonatingRoundTripper{impersonate, delegate}
|
|
}
|
|
|
|
func (rt *impersonatingRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
|
|
// use the user header as marker for the rest.
|
|
if len(req.Header.Get(ImpersonateUserHeader)) != 0 {
|
|
return rt.delegate.RoundTrip(req)
|
|
}
|
|
req = utilnet.CloneRequest(req)
|
|
req.Header.Set(ImpersonateUserHeader, rt.impersonate.UserName)
|
|
|
|
for _, group := range rt.impersonate.Groups {
|
|
req.Header.Add(ImpersonateGroupHeader, group)
|
|
}
|
|
for k, vv := range rt.impersonate.Extra {
|
|
for _, v := range vv {
|
|
req.Header.Add(ImpersonateUserExtraHeaderPrefix+k, v)
|
|
}
|
|
}
|
|
|
|
return rt.delegate.RoundTrip(req)
|
|
}
|
|
|
|
func (rt *impersonatingRoundTripper) CancelRequest(req *http.Request) {
|
|
if canceler, ok := rt.delegate.(requestCanceler); ok {
|
|
canceler.CancelRequest(req)
|
|
} else {
|
|
glog.Errorf("CancelRequest not implemented")
|
|
}
|
|
}
|
|
|
|
func (rt *impersonatingRoundTripper) WrappedRoundTripper() http.RoundTripper { return rt.delegate }
|
|
|
|
type bearerAuthRoundTripper struct {
|
|
bearer string
|
|
rt http.RoundTripper
|
|
}
|
|
|
|
// NewBearerAuthRoundTripper adds the provided bearer token to a request
|
|
// unless the authorization header has already been set.
|
|
func NewBearerAuthRoundTripper(bearer string, rt http.RoundTripper) http.RoundTripper {
|
|
return &bearerAuthRoundTripper{bearer, rt}
|
|
}
|
|
|
|
func (rt *bearerAuthRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
|
|
if len(req.Header.Get("Authorization")) != 0 {
|
|
return rt.rt.RoundTrip(req)
|
|
}
|
|
|
|
req = utilnet.CloneRequest(req)
|
|
req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", rt.bearer))
|
|
return rt.rt.RoundTrip(req)
|
|
}
|
|
|
|
func (rt *bearerAuthRoundTripper) CancelRequest(req *http.Request) {
|
|
if canceler, ok := rt.rt.(requestCanceler); ok {
|
|
canceler.CancelRequest(req)
|
|
} else {
|
|
glog.Errorf("CancelRequest not implemented")
|
|
}
|
|
}
|
|
|
|
func (rt *bearerAuthRoundTripper) WrappedRoundTripper() http.RoundTripper { return rt.rt }
|
|
|
|
// requestInfo keeps track of information about a request/response combination
|
|
type requestInfo struct {
|
|
RequestHeaders http.Header
|
|
RequestVerb string
|
|
RequestURL string
|
|
|
|
ResponseStatus string
|
|
ResponseHeaders http.Header
|
|
ResponseErr error
|
|
|
|
Duration time.Duration
|
|
}
|
|
|
|
// newRequestInfo creates a new RequestInfo based on an http request
|
|
func newRequestInfo(req *http.Request) *requestInfo {
|
|
return &requestInfo{
|
|
RequestURL: req.URL.String(),
|
|
RequestVerb: req.Method,
|
|
RequestHeaders: req.Header,
|
|
}
|
|
}
|
|
|
|
// complete adds information about the response to the requestInfo
|
|
func (r *requestInfo) complete(response *http.Response, err error) {
|
|
if err != nil {
|
|
r.ResponseErr = err
|
|
return
|
|
}
|
|
r.ResponseStatus = response.Status
|
|
r.ResponseHeaders = response.Header
|
|
}
|
|
|
|
// toCurl returns a string that can be run as a command in a terminal (minus the body)
|
|
func (r *requestInfo) toCurl() string {
|
|
headers := ""
|
|
for key, values := range r.RequestHeaders {
|
|
for _, value := range values {
|
|
headers += fmt.Sprintf(` -H %q`, fmt.Sprintf("%s: %s", key, value))
|
|
}
|
|
}
|
|
|
|
return fmt.Sprintf("curl -k -v -X%s %s %s", r.RequestVerb, headers, r.RequestURL)
|
|
}
|
|
|
|
// debuggingRoundTripper will display information about the requests passing
|
|
// through it based on what is configured
|
|
type debuggingRoundTripper struct {
|
|
delegatedRoundTripper http.RoundTripper
|
|
|
|
levels map[debugLevel]bool
|
|
}
|
|
|
|
type debugLevel int
|
|
|
|
const (
|
|
debugJustURL debugLevel = iota
|
|
debugURLTiming
|
|
debugCurlCommand
|
|
debugRequestHeaders
|
|
debugResponseStatus
|
|
debugResponseHeaders
|
|
)
|
|
|
|
func newDebuggingRoundTripper(rt http.RoundTripper, levels ...debugLevel) *debuggingRoundTripper {
|
|
drt := &debuggingRoundTripper{
|
|
delegatedRoundTripper: rt,
|
|
levels: make(map[debugLevel]bool, len(levels)),
|
|
}
|
|
for _, v := range levels {
|
|
drt.levels[v] = true
|
|
}
|
|
return drt
|
|
}
|
|
|
|
func (rt *debuggingRoundTripper) CancelRequest(req *http.Request) {
|
|
if canceler, ok := rt.delegatedRoundTripper.(requestCanceler); ok {
|
|
canceler.CancelRequest(req)
|
|
} else {
|
|
glog.Errorf("CancelRequest not implemented")
|
|
}
|
|
}
|
|
|
|
func (rt *debuggingRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
|
|
reqInfo := newRequestInfo(req)
|
|
|
|
if rt.levels[debugJustURL] {
|
|
glog.Infof("%s %s", reqInfo.RequestVerb, reqInfo.RequestURL)
|
|
}
|
|
if rt.levels[debugCurlCommand] {
|
|
glog.Infof("%s", reqInfo.toCurl())
|
|
|
|
}
|
|
if rt.levels[debugRequestHeaders] {
|
|
glog.Infof("Request Headers:")
|
|
for key, values := range reqInfo.RequestHeaders {
|
|
for _, value := range values {
|
|
glog.Infof(" %s: %s", key, value)
|
|
}
|
|
}
|
|
}
|
|
|
|
startTime := time.Now()
|
|
response, err := rt.delegatedRoundTripper.RoundTrip(req)
|
|
reqInfo.Duration = time.Since(startTime)
|
|
|
|
reqInfo.complete(response, err)
|
|
|
|
if rt.levels[debugURLTiming] {
|
|
glog.Infof("%s %s %s in %d milliseconds", reqInfo.RequestVerb, reqInfo.RequestURL, reqInfo.ResponseStatus, reqInfo.Duration.Nanoseconds()/int64(time.Millisecond))
|
|
}
|
|
if rt.levels[debugResponseStatus] {
|
|
glog.Infof("Response Status: %s in %d milliseconds", reqInfo.ResponseStatus, reqInfo.Duration.Nanoseconds()/int64(time.Millisecond))
|
|
}
|
|
if rt.levels[debugResponseHeaders] {
|
|
glog.Infof("Response Headers:")
|
|
for key, values := range reqInfo.ResponseHeaders {
|
|
for _, value := range values {
|
|
glog.Infof(" %s: %s", key, value)
|
|
}
|
|
}
|
|
}
|
|
|
|
return response, err
|
|
}
|
|
|
|
func (rt *debuggingRoundTripper) WrappedRoundTripper() http.RoundTripper {
|
|
return rt.delegatedRoundTripper
|
|
}
|