cloudflared-mirror/cmd/cloudflared/main.go

122 lines
3.7 KiB
Go

package main
import (
"fmt"
"os"
"time"
"golang.org/x/crypto/ssh/terminal"
"github.com/cloudflare/cloudflared/cmd/cloudflared/access"
"github.com/cloudflare/cloudflared/cmd/cloudflared/tunnel"
"github.com/cloudflare/cloudflared/cmd/cloudflared/updater"
"github.com/cloudflare/cloudflared/log"
"github.com/cloudflare/cloudflared/metrics"
"github.com/getsentry/raven-go"
"github.com/mitchellh/go-homedir"
"gopkg.in/urfave/cli.v2"
"github.com/pkg/errors"
)
const (
developerPortal = "https://developers.cloudflare.com/argo-tunnel"
licenseUrl = developerPortal + "/licence/"
)
var (
Version = "DEV"
BuildTime = "unknown"
logger = log.CreateLogger()
)
func main() {
metrics.RegisterBuildInfo(BuildTime, Version)
raven.SetRelease(Version)
// Force shutdown channel used by the app. When closed, app must terminate.
// Windows service manager closes this channel when it receives shutdown command.
shutdownC := make(chan struct{})
// Graceful shutdown channel used by the app. When closed, app must terminate.
// Windows service manager closes this channel when it receives stop command.
graceShutdownC := make(chan struct{})
app := &cli.App{}
app.Name = "cloudflared"
app.Usage = "Cloudflare's command-line tool and agent"
app.ArgsUsage = "origin-url"
app.Copyright = fmt.Sprintf(`(c) %d Cloudflare Inc.
Use is subject to the license agreement at %s`, time.Now().Year(), licenseUrl)
app.Version = fmt.Sprintf("%s (built %s)", Version, BuildTime)
app.Description = `cloudflared connects your machine or user identity to Cloudflare's global network.
You can use it to authenticate a session to reach an API behind Access, route web traffic to this machine,
and configure access control.`
app.Flags = flags()
app.Action = action(Version, shutdownC, graceShutdownC)
app.Before = tunnel.Before
app.Commands = commands()
tunnel.Init(Version, shutdownC, graceShutdownC) // we need this to support the tunnel sub command...
runApp(app, shutdownC, graceShutdownC)
}
func commands() []*cli.Command {
cmds := []*cli.Command{
{
Name: "update",
Action: updater.Update,
Usage: "Update the agent if a new version exists",
ArgsUsage: " ",
Description: `Looks for a new version on the official download server.
If a new version exists, updates the agent binary and quits.
Otherwise, does nothing.
To determine if an update happened in a script, check for error code 64.`,
},
}
cmds = append(cmds, tunnel.Commands()...)
cmds = append(cmds, access.Commands()...)
return cmds
}
func flags() []cli.Flag {
flags := tunnel.Flags()
return append(flags, access.Flags()...)
}
func action(version string, shutdownC, graceShutdownC chan struct{}) cli.ActionFunc {
return func(c *cli.Context) (err error) {
if isRunningFromTerminal() {
logger.Error("Use of cloudflared without commands is deprecated.")
cli.ShowAppHelp(c)
return nil
}
tags := make(map[string]string)
tags["hostname"] = c.String("hostname")
raven.SetTagsContext(tags)
raven.CapturePanic(func() { err = tunnel.StartServer(c, version, shutdownC, graceShutdownC) }, nil)
if err != nil {
raven.CaptureError(err, nil)
}
return err
}
}
func userHomeDir() (string, error) {
// This returns the home dir of the executing user using OS-specific method
// for discovering the home dir. It's not recommended to call this function
// when the user has root permission as $HOME depends on what options the user
// use with sudo.
homeDir, err := homedir.Dir()
if err != nil {
logger.WithError(err).Error("Cannot determine home directory for the user")
return "", errors.Wrap(err, "Cannot determine home directory for the user")
}
return homeDir, nil
}
func isRunningFromTerminal() bool {
return terminal.IsTerminal(int(os.Stdout.Fd()))
}