mirror of https://github.com/k3s-io/k3s
131 lines
4.0 KiB
Go
131 lines
4.0 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package rest
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import (
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"crypto/tls"
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"errors"
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"net/http"
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"k8s.io/client-go/pkg/apis/clientauthentication"
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"k8s.io/client-go/plugin/pkg/client/auth/exec"
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"k8s.io/client-go/transport"
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)
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// TLSConfigFor returns a tls.Config that will provide the transport level security defined
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// by the provided Config. Will return nil if no transport level security is requested.
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func TLSConfigFor(config *Config) (*tls.Config, error) {
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cfg, err := config.TransportConfig()
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if err != nil {
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return nil, err
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}
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return transport.TLSConfigFor(cfg)
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}
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// TransportFor returns an http.RoundTripper that will provide the authentication
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// or transport level security defined by the provided Config. Will return the
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// default http.DefaultTransport if no special case behavior is needed.
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func TransportFor(config *Config) (http.RoundTripper, error) {
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cfg, err := config.TransportConfig()
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if err != nil {
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return nil, err
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}
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return transport.New(cfg)
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}
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// HTTPWrappersForConfig wraps a round tripper with any relevant layered behavior from the
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// config. Exposed to allow more clients that need HTTP-like behavior but then must hijack
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// the underlying connection (like WebSocket or HTTP2 clients). Pure HTTP clients should use
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// the higher level TransportFor or RESTClientFor methods.
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func HTTPWrappersForConfig(config *Config, rt http.RoundTripper) (http.RoundTripper, error) {
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cfg, err := config.TransportConfig()
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if err != nil {
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return nil, err
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}
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return transport.HTTPWrappersForConfig(cfg, rt)
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}
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// TransportConfig converts a client config to an appropriate transport config.
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func (c *Config) TransportConfig() (*transport.Config, error) {
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conf := &transport.Config{
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UserAgent: c.UserAgent,
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Transport: c.Transport,
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WrapTransport: c.WrapTransport,
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DisableCompression: c.DisableCompression,
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TLS: transport.TLSConfig{
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Insecure: c.Insecure,
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ServerName: c.ServerName,
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CAFile: c.CAFile,
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CAData: c.CAData,
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CertFile: c.CertFile,
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CertData: c.CertData,
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KeyFile: c.KeyFile,
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KeyData: c.KeyData,
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NextProtos: c.NextProtos,
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},
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Username: c.Username,
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Password: c.Password,
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BearerToken: c.BearerToken,
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BearerTokenFile: c.BearerTokenFile,
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Impersonate: transport.ImpersonationConfig{
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UserName: c.Impersonate.UserName,
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Groups: c.Impersonate.Groups,
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Extra: c.Impersonate.Extra,
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},
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Dial: c.Dial,
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Proxy: c.Proxy,
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}
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if c.ExecProvider != nil && c.AuthProvider != nil {
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return nil, errors.New("execProvider and authProvider cannot be used in combination")
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}
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if c.ExecProvider != nil {
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var cluster *clientauthentication.Cluster
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if c.ExecProvider.ProvideClusterInfo {
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var err error
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cluster, err = ConfigToExecCluster(c)
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if err != nil {
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return nil, err
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}
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}
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provider, err := exec.GetAuthenticator(c.ExecProvider, cluster)
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if err != nil {
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return nil, err
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}
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if err := provider.UpdateTransportConfig(conf); err != nil {
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return nil, err
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}
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}
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if c.AuthProvider != nil {
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provider, err := GetAuthProvider(c.Host, c.AuthProvider, c.AuthConfigPersister)
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if err != nil {
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return nil, err
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}
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conf.Wrap(provider.WrapTransport)
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}
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return conf, nil
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}
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// Wrap adds a transport middleware function that will give the caller
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// an opportunity to wrap the underlying http.RoundTripper prior to the
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// first API call being made. The provided function is invoked after any
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// existing transport wrappers are invoked.
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func (c *Config) Wrap(fn transport.WrapperFunc) {
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c.WrapTransport = transport.Wrappers(c.WrapTransport, fn)
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}
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