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Copy pathclient.go
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125 lines (112 loc) · 3.52 KB
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/*
* Minio Cloud Storage, (C) 2018 Minio, Inc.
*
* Licensed under the Apa
8000
che 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 rest
import (
"context"
"crypto/tls"
"errors"
"io"
"io/ioutil"
"net"
"net/http"
"net/url"
"time"
xhttp "github.com/minio/minio/cmd/http"
"golang.org/x/net/http2"
)
// DefaultRESTTimeout - default RPC timeout is one minute.
const DefaultRESTTimeout = 1 * time.Minute
// Client - http based RPC client.
type Client struct {
httpClient *http.Client
httpIdleConnsCloser func()
url *url.URL
newAuthToken func() string
}
// Call - make a REST call.
func (c *Client) Call(method string, values url.Values, body io.Reader, length int64) (reply io.ReadCloser, err error) {
req, err := http.NewRequest(http.MethodPost, c.url.String()+"/"+method+"?"+values.Encode(), body)
if err != nil {
return nil, err
}
req.Header.Set("Authorization", "Bearer "+c.newAuthToken())
req.Header.Set("X-Minio-Time", time.Now().UTC().Format(time.RFC3339))
if length > 0 {
req.ContentLength = length
}
resp, err := c.httpClient.Do(req)
if err != nil {
return nil, err
}
if resp.StatusCode != http.StatusOK {
defer xhttp.DrainBody(resp.Body)
// Limit the ReadAll(), just in case, because of a bug, the server responds with large data.
b, err := ioutil.ReadAll(io.LimitReader(resp.Body, 4096))
if err != nil {
return nil, err
}
return nil, errors.New(string(b))
}
return resp.Body, nil
}
// Close closes all idle connections of the underlying http client
func (c *Client) Close() {
if c.httpIdleConnsCloser != nil {
c.httpIdleConnsCloser()
}
}
func newCustomDialContext(timeout time.Duration) func(ctx context.Context, network, addr string) (net.Conn, error) {
return func(ctx context.Context, network, addr string) (net.Conn, error) {
dialer := &net.Dialer{
Timeout: timeout,
KeepAlive: timeout,
DualStack: true,
}
conn, err := dialer.DialContext(ctx, network, addr)
if err != nil {
return nil, err
}
return xhttp.NewTimeoutConn(conn, timeout, timeout), nil
}
}
// NewClient - returns new REST client.
func NewClient(url *url.URL, tlsConfig *tls.Config, timeout time.Duration, newAuthToken func() string) (*Client, error) {
// Transport is exactly same as Go default in https://golang.org/pkg/net/http/#RoundTripper
// except custom DialContext and TLSClientConfig.
tr := &http.Transport{
Proxy: http.ProxyFromEnvironment,
DialContext: newCustomDialContext(timeout),
MaxIdleConnsPerHost: 4096,
MaxIdleConns: 4096,
IdleConnTimeout: 120 * time.Second,
TLSHandshakeTimeout: 30 * time.Second,
ExpectContinueTimeout: 10 * time.Second,
TLSClientConfig: tlsConfig,
DisableCompression: true,
}
if tlsConfig != nil {
// If TLS is enabled configure http2
if err := http2.ConfigureTransport(tr); err != nil {
return nil, err
}
}
return &Client{
httpClient: &http.Client{Transport: tr},
httpIdleConnsCloser: tr.CloseIdleConnections,
url: url,
newAuthToken: newAuthToken,
}, nil
}