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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"
"net"
"net/http"
"time"
"golang.org/x/net/http2"
)
// 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.RoundTripper, error) {
tr := &http.Transport{
Proxy: http.ProxyFromEnvironment,
DialContext: (&net.Dialer{
Timeout: 30 * time.Second,
KeepAlive: 30 * time.Second,
}).DialContext,
MaxIdleConns: 1024,
MaxIdleConnsPerHost: 1024,
IdleConnTimeout: 90 * time.Second,
TLSHandshakeTimeout: 10 * time.Second,
ExpectContinueTimeout: 1 * 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 {
rootCAs, _ := x509.SystemCertPool()
if rootCAs == nil {
// In some systems (like Windows) system cert pool is
// not supported or no certificates are present on the
// system - so we create a new cert pool.
rootCAs = x509.NewCertPool()
}
// Keep TLS config.
tlsConfig := &tls.Config{
RootCAs: rootCAs,
// 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,
}
tr.TLSClientConfig = tlsConfig
// Because we create a custom TLSClientConfig, we have to opt-in to HTTP/2.
// See https://github.com/golang/go/issues/14275
if err := http2.ConfigureTransport(tr); err != nil {
return nil, err
}
}
return tr, nil
}
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