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datasource_cache.go
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/
datasource_cache.go
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package models
import (
"crypto/tls"
"crypto/x509"
"net"
"net/http"
"sync"
"time"
)
type proxyTransportCache struct {
cache map[int64]cachedTransport
sync.Mutex
}
type cachedTransport struct {
updated time.Time
*http.Transport
}
var ptc = proxyTransportCache{
cache: make(map[int64]cachedTransport),
}
func (ds *DataSource) GetHttpClient() (*http.Client, error) {
transport, err := ds.GetHttpTransport()
if err != nil {
return nil, err
}
return &http.Client{
Timeout: time.Duration(30 * time.Second),
Transport: transport,
}, nil
}
func (ds *DataSource) GetHttpTransport() (*http.Transport, error) {
ptc.Lock()
defer ptc.Unlock()
if t, present := ptc.cache[ds.Id]; present && ds.Updated.Equal(t.updated) {
return t.Transport, nil
}
transport := &http.Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: true,
},
Proxy: http.ProxyFromEnvironment,
Dial: (&net.Dialer{
Timeout: 30 * time.Second,
KeepAlive: 30 * time.Second,
}).Dial,
TLSHandshakeTimeout: 10 * time.Second,
ExpectContinueTimeout: 1 * time.Second,
MaxIdleConns: 100,
IdleConnTimeout: 90 * time.Second,
}
var tlsAuth, tlsAuthWithCACert bool
if ds.JsonData != nil {
tlsAuth = ds.JsonData.Get("tlsAuth").MustBool(false)
tlsAuthWithCACert = ds.JsonData.Get("tlsAuthWithCACert").MustBool(false)
}
if tlsAuth {
transport.TLSClientConfig.InsecureSkipVerify = false
decrypted := ds.SecureJsonData.Decrypt()
if tlsAuthWithCACert && len(decrypted["tlsCACert"]) > 0 {
caPool := x509.NewCertPool()
ok := caPool.AppendCertsFromPEM([]byte(decrypted["tlsCACert"]))
if ok {
transport.TLSClientConfig.RootCAs = caPool
}
}
cert, err := tls.X509KeyPair([]byte(decrypted["tlsClientCert"]), []byte(decrypted["tlsClientKey"]))
if err != nil {
return nil, err
}
transport.TLSClientConfig.Certificates = []tls.Certificate{cert}
}
ptc.cache[ds.Id] = cachedTransport{
Transport: transport,
updated: ds.Updated,
}
return transport, nil
}