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// +build go1.7 go1.8
/*
* MinIO Go Library for Amazon S3 Compatible Cloud Storage
* Copyright 2017-2018 MinIO, Inc.
*
* 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 minio
import (
"crypto/tls"
"crypto/x509"
"io/ioutil"
"net"
"net/http"
"os"
"time"
)
// mustGetSystemCertPool - return system CAs or empty pool in case of error (or windows)
func mustGetSystemCertPool() *x509.CertPool {
pool, err := x509.SystemCertPool()
if err != nil {
return x509.NewCertPool()
}
return pool
}
// DefaultTransport - this default transport is similar to
// http.DefaultTransport but with additional param DisableCompression
// is set to true to avoid decompressing content with 'gzip' encoding.
var DefaultTransport = func(secure bool) (*http.Transport, error) {
tr := &http.Transport{
Proxy: http.ProxyFromEnvironment,
DialContext: (&net.Dialer{
Timeout: 30 * time.Second,
KeepAlive: 30 * time.Second,
}).DialContext,
MaxIdleConns: 256,
MaxIdleConnsPerHost: 16,
ResponseHeaderTimeout: time.Minute,
IdleConnTimeout: time.Minute,
TLSHandshakeTimeout: 10 * time.Second,
ExpectContinueTimeout: 10 * time.Second,
// Set this value so that the underlying transport round-tripper
// doesn't try to auto decode the body of objects with
// content-encoding set to `gzip`.
//
// Refer:
// https://golang.org/src/net/http/transport.go?h=roundTrip#L1843
DisableCompression: true,
}
if secure {
tr.TLSClientConfig = &tls.Config{
// Can't use SSLv3 because of POODLE and BEAST
// Can't use TLSv1.0 because of POODLE and BEAST using CBC cipher
// Can't use TLSv1.1 because of RC4 cipher usage
MinVersion: tls.VersionTLS12,
}
if f := os.Getenv("SSL_CERT_FILE"); f != "" {
rootCAs := mustGetSystemCertPool()
data, err := ioutil.ReadFile(f)
if err == nil {
rootCAs.AppendCertsFromPEM(data)
}
tr.TLSClientConfig.RootCAs = rootCAs
}
}
return tr, nil
}
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