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// Copyright 2021 PingCAP, 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package proxy
import (
"context"
"fmt"
"net/http"
"os"
"sync/atomic"
"github.com/fatih/color"
logprinter "github.com/pingcap/tiup/pkg/logger/printer"
"github.com/pingcap/tiup/pkg/tui"
"github.com/pingcap/tiup/pkg/utils"
)
var (
httpProxy *http.Server
tcpProxy atomic.Value
)
// MaybeStartProxy maybe starts an inner http/tcp proxies
func MaybeStartProxy(
host string,
port int,
user string,
usePass bool,
identity string,
logger *logprinter.Logger,
) error {
if len(host) == 0 {
return nil
}
sshProps, err := tui.ReadIdentityFileOrPassword(identity, usePass)
if err != nil {
return err
}
httpPort := utils.MustGetFreePort("127.0.0.1", 12345, 0)
addr := fmt.Sprintf("127.0.0.1:%d", httpPort)
// TODO: Using environment variables to share data may not be a good idea
os.Setenv("TIUP_INNER_HTTP_PROXY", "http://"+addr)
httpProxy = &http.Server{
Addr: addr,
Handler: NewHTTPProxy(
host, port, user,
sshProps.Password,
sshProps.IdentityFile,
sshProps.IdentityFilePassphrase,
logger,
),
}
logger.Infof("%s", color.HiGreenString("Start HTTP inner proxy %s", httpProxy.Addr))
go func() {
if err := httpProxy.ListenAndServe(); err != nil && err != http.ErrServerClosed {
logger.Errorf("Failed to listen HTTP proxy: %v", err)
}
}()
p := NewTCPProxy(
host, port, user,
sshProps.Password,
sshProps.IdentityFile,
sshProps.IdentityFilePassphrase,
logger,
)
tcpProxy.Store(p)
logger.Infof("%s", color.HiGreenString("Start TCP inner proxy %s", p.endpoint))
return nil
}
// MaybeStopProxy stops the http/tcp proxies if it has been started before
func MaybeStopProxy() {
if httpProxy != nil {
_ = httpProxy.Shutdown(context.Background())
os.Unsetenv("TIUP_INNER_HTTP_PROXY")
}
if p := tcpProxy.Load(); p != nil {
_ = p.(*TCPProxy).Stop()
}
}
// GetTCPProxy returns the tcp proxy
func GetTCPProxy() *TCPProxy {
p := tcpProxy.Load()
if p != nil {
return p.(*TCPProxy)
}
return nil
}
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