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// Copyright 2015 Matthew Holt and The Caddy Authors
//
// 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 caddycmd
import (
"bytes"
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"net"
"os"
)
// Main executes the main function of the caddy command.
func Main() {
if len(os.Args) <= 1 {
fmt.Println(usageString())
return
}
subcommand, ok := commands[os.Args[1]]
if !ok {
fmt.Printf("%q is not a valid command\n", os.Args[1])
os.Exit(2)
}
if exitCode, err := subcommand(); err != nil {
log.Println(err)
os.Exit(exitCode)
}
}
// commandFunc is a function that executes
// a subcommand. It returns an exit code and
// any associated error.
type commandFunc func() (int, error)
var commands = map[string]commandFunc{
"start": cmdStart,
"stop": cmdStop,
"run": cmdRun,
"version": cmdVersion,
"list-modules": cmdListModules,
"environ": cmdEnviron,
}
func usageString() string {
buf := new(bytes.Buffer)
buf.WriteString("usage: caddy <command> [<args>]")
flag.CommandLine.SetOutput(buf)
flag.CommandLine.PrintDefaults()
return buf.String()
}
// handlePingbackConn reads from conn and ensures it matches
// the bytes in expect, or returns an error if it doesn't.
func handlePingbackConn(conn net.Conn, expect []byte) error {
defer conn.Close()
confirmationBytes, err := ioutil.ReadAll(io.LimitReader(conn, 32))
if err != nil {
return err
}
if !bytes.Equal(confirmationBytes, expect) {
return fmt.Errorf("wrong confirmation: %x", confirmationBytes)
}
return nil
}
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