118 lines
3.2 KiB
Go
118 lines
3.2 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"
|
||
|
|
"net/http"
|
||
|
|
"sync"
|
||
|
|
"time"
|
||
|
|
|
||
|
|
utilnet "k8s.io/apimachinery/pkg/util/net"
|
||
|
|
)
|
||
|
|
|
||
|
|
// TlsTransportCache caches TLS http.RoundTrippers different configurations. The
|
||
|
|
// same RoundTripper will be returned for configs with identical TLS options If
|
||
|
|
// the config has no custom TLS options, http.DefaultTransport is returned.
|
||
|
|
type tlsTransportCache struct {
|
||
|
|
mu sync.Mutex
|
||
|
|
transports map[tlsCacheKey]*http.Transport
|
||
|
|
}
|
||
|
|
|
||
|
|
const idleConnsPerHost = 25
|
||
|
|
|
||
|
|
var tlsCache = &tlsTransportCache{transports: make(map[tlsCacheKey]*http.Transport)}
|
||
|
|
|
||
|
|
type tlsCacheKey struct {
|
||
|
|
insecure bool
|
||
|
|
caData string
|
||
|
|
certData string
|
||
|
|
keyData string
|
||
|
|
getCert string
|
||
|
|
serverName string
|
||
|
|
dial string
|
||
|
|
}
|
||
|
|
|
||
|
|
func (t tlsCacheKey) String() string {
|
||
|
|
keyText := "<none>"
|
||
|
|
if len(t.keyData) > 0 {
|
||
|
|
keyText = "<redacted>"
|
||
|
|
}
|
||
|
|
return fmt.Sprintf("insecure:%v, caData:%#v, certData:%#v, keyData:%s, getCert: %s, serverName:%s, dial:%s", t.insecure, t.caData, t.certData, keyText, t.getCert, t.serverName, t.dial)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *tlsTransportCache) get(config *Config) (http.RoundTripper, error) {
|
||
|
|
key, err := tlsConfigKey(config)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
|
||
|
|
// Ensure we only create a single transport for the given TLS options
|
||
|
|
c.mu.Lock()
|
||
|
|
defer c.mu.Unlock()
|
||
|
|
|
||
|
|
// See if we already have a custom transport for this config
|
||
|
|
if t, ok := c.transports[key]; ok {
|
||
|
|
return t, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// Get the TLS options for this client config
|
||
|
|
tlsConfig, err := TLSConfigFor(config)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
// The options didn't require a custom TLS config
|
||
|
|
if tlsConfig == nil && config.Dial == nil {
|
||
|
|
return http.DefaultTransport, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
dial := config.Dial
|
||
|
|
if dial == nil {
|
||
|
|
dial = (&net.Dialer{
|
||
|
|
Timeout: 30 * time.Second,
|
||
|
|
KeepAlive: 30 * time.Second,
|
||
|
|
}).DialContext
|
||
|
|
}
|
||
|
|
// Cache a single transport for these options
|
||
|
|
c.transports[key] = utilnet.SetTransportDefaults(&http.Transport{
|
||
|
|
Proxy: http.ProxyFromEnvironment,
|
||
|
|
TLSHandshakeTimeout: 10 * time.Second,
|
||
|
|
TLSClientConfig: tlsConfig,
|
||
|
|
MaxIdleConnsPerHost: idleConnsPerHost,
|
||
|
|
DialContext: dial,
|
||
|
|
})
|
||
|
|
return c.transports[key], nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// tlsConfigKey returns a unique key for tls.Config objects returned from TLSConfigFor
|
||
|
|
func tlsConfigKey(c *Config) (tlsCacheKey, error) {
|
||
|
|
// Make sure ca/key/cert content is loaded
|
||
|
|
if err := loadTLSFiles(c); err != nil {
|
||
|
|
return tlsCacheKey{}, err
|
||
|
|
}
|
||
|
|
return tlsCacheKey{
|
||
|
|
insecure: c.TLS.Insecure,
|
||
|
|
caData: string(c.TLS.CAData),
|
||
|
|
certData: string(c.TLS.CertData),
|
||
|
|
keyData: string(c.TLS.KeyData),
|
||
|
|
getCert: fmt.Sprintf("%p", c.TLS.GetCert),
|
||
|
|
serverName: c.TLS.ServerName,
|
||
|
|
dial: fmt.Sprintf("%p", c.Dial),
|
||
|
|
}, nil
|
||
|
|
}
|