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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"
"github.com/caddyserver/caddy/v2"
"github.com/caddyserver/caddy/v2/caddyconfig"
)
// Main implements the main function of the caddy command.
// Call this if Caddy is to be the main() if your program.
func Main() {
caddy.TrapSignals()
if len(os.Args) < 2 {
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(caddy.ExitCodeFailedStartup)
}
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,
"run": cmdRun,
"stop": cmdStop,
"reload": cmdReload,
"version": cmdVersion,
"list-modules": cmdListModules,
"environ": cmdEnviron,
"adapt-config": cmdAdaptConfig,
}
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
}
// loadConfig loads the config from configFile and adapts it
// using adapterName. If adapterName is specified, configFile
// must be also. It prints any warnings to stderr, and returns
// the resulting JSON config bytes.
func loadConfig(configFile, adapterName string) ([]byte, error) {
// specifying an adapter without a config file is ambiguous
if configFile == "" && adapterName != "" {
return nil, fmt.Errorf("cannot adapt config without config file (use --config)")
}
// load initial config and adapter
var config []byte
var cfgAdapter caddyconfig.Adapter
var err error
if configFile != "" {
config, err = ioutil.ReadFile(configFile)
if err != nil {
return nil, fmt.Errorf("reading config file: %v", err)
}
} else if adapterName == "" {
// as a special case when no config file or adapter
// is specified, see if the Caddyfile adapter is
// plugged in, and if so, try using a default Caddyfile
cfgAdapter = caddyconfig.GetAdapter("caddyfile")
if cfgAdapter != nil {
config, err = ioutil.ReadFile("Caddyfile")
if os.IsNotExist(err) {
// okay, no default Caddyfile; pretend like this never happened
cfgAdapter = nil
err = nil
} else if err != nil {
// default Caddyfile exists, but error reading it
return nil, fmt.Errorf("reading default Caddyfile: %v", err)
} else {
// success reading default Caddyfile
configFile = "Caddyfile"
}
}
}
// load config adapter
if adapterName != "" {
cfgAdapter = caddyconfig.GetAdapter(adapterName)
if cfgAdapter == nil {
return nil, fmt.Errorf("unrecognized config adapter: %s", adapterName)
}
}
// adapt config
if cfgAdapter != nil {
adaptedConfig, warnings, err := cfgAdapter.Adapt(config, map[string]interface{}{
"filename": configFile,
})
if err != nil {
return nil, fmt.Errorf("adapting config using %s: %v", adapterName, err)
}
for _, warn := range warnings {
msg := warn.Message
if warn.Directive != "" {
msg = fmt.Sprintf("%s: %s", warn.Directive, warn.Message)
}
fmt.Printf("[WARNING][%s] %s:%d: %s", adapterName, warn.File, warn.Line, msg)
}
config = adaptedConfig
}
return config, nil
}
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