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editor.go
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editor.go
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package editor
/* Package editor provides alm-tools cloud editor automation for the iris web framework.
Usage:
import "github.com/kataras/iris/typescript/editor"
[...]
app := iris.New()
e := editor.New(editor.Config{})
e.Run(app.Logger().Infof)
[...]
app.Run(iris.Addr(":8080"))
e.Stop()
General notes for authentication
The Authorization specifies the authentication mechanism (in this case Basic) followed by the username and password.
Although, the string aHR0cHdhdGNoOmY= may look encrypted it is simply a base64 encoded version of <username>:<password>.
Would be readily available to anyone who could intercept the HTTP request.
*/
import (
"bufio"
"io"
"os"
"path/filepath"
"strconv"
"github.com/kataras/iris/typescript/npm"
)
type (
// Editor is the alm-tools adaptor.
//
// It holds a logger from the iris' station
// username,password for basic auth
// directory which the client side code is
// keyfile,certfile for TLS listening
// and a host which is listening for
Editor struct {
config *Config
log func(format string, a ...interface{})
enabled bool // default true
// after alm started
process *os.Process
debugOutput io.Writer
}
)
var (
// NoOpLogger can be used as the logger argument, it prints nothing.
NoOpLogger = func(string, ...interface{}) {}
)
// New creates and returns an Editor Plugin instance
func New(cfg ...Config) *Editor {
c := DefaultConfig()
if len(cfg) > 0 {
c = cfg[0]
}
c.WorkingDir = validateWorkingDir(c.WorkingDir) // add "/" if not exists
return &Editor{
enabled: true,
config: &c,
}
}
// User set a user, accepts two parameters: username (string), string (string)
func (e *Editor) User(username string, password string) *Editor {
e.config.Username = username
e.config.Password = password
return e
}
func validateWorkingDir(workingDir string) string {
l := workingDir[len(workingDir)-1]
if l != '/' && l != os.PathSeparator {
workingDir += "/"
}
return workingDir
}
// Dir sets the directory which the client side source code alive
func (e *Editor) Dir(workingDir string) *Editor {
e.config.WorkingDir = validateWorkingDir(workingDir)
return e
}
// Port sets the port (int) for the editor adaptor's standalone server
func (e *Editor) Port(port int) *Editor {
e.config.Port = port
return e
}
// SetEnable if true enables the editor adaptor, otherwise disables it
func (e *Editor) SetEnable(enable bool) {
e.enabled = enable
}
// DisableOutput call that if you don't care about alm-tools' messages
// they are useful because that the default configuration shows them
func (e *Editor) DisableOutput() {
e.config.DisableOutput = true
}
// GetDescription EditorPlugin is a bridge between iris and the alm-tools, the browser-based IDE for client-side sources.
func (e *Editor) GetDescription() string {
return "A bridge between iris and the alm-tools, the browser-based IDE."
}
// we use that editorWriter to prefix the editor's output with "Editor Adaptor: "
type editorWriter struct {
underline io.Writer
}
// Run starts the editor's server.
//
// Developers should call the `Stop` to shutdown the editor's server when main server will be closed.
func (e *Editor) Run(logger func(format string, a ...interface{})) {
if logger == nil {
logger = NoOpLogger
}
e.log = logger
if e.config.Hostname == "" {
e.config.Hostname = "0.0.0.0"
}
if e.config.Port <= 0 {
e.config.Port = DefaultPort
}
if s, err := filepath.Abs(e.config.WorkingDir); err == nil {
e.config.WorkingDir = s
}
e.start()
}
// Stop kills the editor's server.
func (e *Editor) Stop() {
if e.process != nil {
err := e.process.Kill()
if err != nil {
e.log("error while trying to terminate the Editor,please kill this process by yourself, process id: %d", e.process.Pid)
}
}
}
// start starts the job
func (e *Editor) start() {
if e.config.Username == "" || e.config.Password == "" {
e.log("error before running alm-tools. You have to set username & password for security reasons, otherwise this adaptor won't run.")
return
}
if !npm.NodeModuleExists("alm/bin/alm") {
e.log("installing alm-tools, please wait...")
res := npm.NodeModuleInstall("alm")
if res.Error != nil {
e.log(res.Error.Error())
return
}
e.log(res.Message)
}
cmd := npm.CommandBuilder("node", npm.NodeModuleAbs("alm/src/server.js"))
cmd.AppendArguments("-a", e.config.Username+":"+e.config.Password,
"-h", e.config.Hostname, "-t", strconv.Itoa(e.config.Port), "-d", e.config.WorkingDir)
// for auto-start in the browser: cmd.AppendArguments("-o")
if e.config.KeyFile != "" && e.config.CertFile != "" {
cmd.AppendArguments("--httpskey", e.config.KeyFile, "--httpscert", e.config.CertFile)
}
prefix := ""
// when debug is not disabled
// show any messages to the user( they are useful here)
// to the io.Writer that iris' user is defined from configuration
if !e.config.DisableOutput {
outputReader, err := cmd.StdoutPipe()
if err == nil {
outputScanner := bufio.NewScanner(outputReader)
go func() {
for outputScanner.Scan() {
e.log(prefix + outputScanner.Text())
}
}()
errReader, err := cmd.StderrPipe()
if err == nil {
errScanner := bufio.NewScanner(errReader)
go func() {
for errScanner.Scan() {
e.log(prefix + errScanner.Text())
}
}()
}
}
}
err := cmd.Start()
if err != nil {
e.log(prefix + err.Error())
return
}
// no need, alm-tools post these
// e.logger.Printf("Editor is running at %s:%d | %s", e.config.Hostname, e.config.Port, e.config.WorkingDir)
}