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42 changed files with 9258 additions and 5376 deletions

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@ -1,20 +0,0 @@
kind: pipeline
name: default
steps:
- name: build
image: golang:1.17.2
commands:
- git tag $DRONE_TAG
- bash make.sh
- echo -n "latest,${DRONE_TAG#v}" > .tags
- name: gitea_release
image: plugins/gitea-release
settings:
api_key:
from_secret: gitea_api_key
base_url: https://kumoly.io
files: dist/*
checksum:
- sha256
trigger:
event: tag

4
.gitignore vendored
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@ -1,3 +1 @@
node_modules node_modules
.parcel-cache
dist

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@ -1,40 +1 @@
# gterm # goshell
## Usage
```shell
Usage: gterm [options]
-addr string
address to bind (default ":8000")
-allow string
restrict ip
-arg value
additional args to pass to cmd, multiple args can be passed, ex. -arg a -arg b
-dev
set the system to development mode
-dir string
the working dir that the shell will start from
-log-level int
log level, error:1 debug:2 warn:4 info:8 (default 9)
-name string
the application name (default "gterm")
-profile
print default profile, could be invoked with <(..)
-shell string
the shell to use (default "bash")
-v show version
```
### run bash with default profile
```shell
gterm -arg "--rcfile" -arg <(gterm -profile)
```
## Install
```shell
sudo rm -f /usr/local/bin/gterm
sudo sh -c "curl -fsSL RELEASE_URL | tar -C /usr/local/bin/ -xz"
```

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@ -1,13 +0,0 @@
#!/bin/bash
VERSION=$(git describe --tags --abbrev=0)
BUILD=$(git rev-parse --short HEAD)
PROJ=gterm
DIST=dist
LDFLAGS="-ldflags \"-X main.Version=${VERSION} -X main.Build=${BUILD} -w -s\""
BIN_FILENAME="${PROJ}"
CMD="CGO_ENABLED=0 go build ${LDFLAGS} -o ${DIST}/${BIN_FILENAME} cmd/gterm/main.go"
echo "${CMD}"
eval $CMD

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@ -1,122 +0,0 @@
package main
import (
"flag"
"fmt"
"net"
"net/http"
"os"
"strings"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"kumoly.io/lib/guard"
"kumoly.io/tools/gterm"
)
type arrayFlags []string
func (i *arrayFlags) String() string {
return strings.Join(*i, ", ")
}
func (i *arrayFlags) Set(value string) error {
*i = append(*i, strings.TrimSpace(value))
return nil
}
var Version = "0.0.0"
var Build = "alpha"
var (
flagAllowIPNet string
flagAppName string
flagAddr string
flagShell string
flagDir string
flagLogLevel int
flagLogPretty bool
flagDev bool
flagVer bool
flagArgs arrayFlags
flagProfile bool
flagSalt string
flagUsr string
flagPasswd string
)
func init() {
flag.StringVar(&flagAppName, "name", "gterm", "the application name")
flag.StringVar(&flagAddr, "addr", ":8000", "address to bind")
flag.StringVar(&flagShell, "shell", "bash", "the shell to use")
flag.StringVar(&flagDir, "dir", "", "the working dir that the shell will start from")
flag.Var(&flagArgs, "arg", "additional args to pass to cmd, multiple args can be passed, ex. -arg a -arg b")
flag.BoolVar(&flagDev, "dev", false, "set the system to development mode")
flag.IntVar(&flagLogLevel, "log-level", 1, "log level [-1(trace):5(panic)] 7 to disable")
flag.StringVar(&flagAllowIPNet, "allow", "", "restrict ip in a specific ip net")
flag.BoolVar(&flagProfile, "profile", false, "print default profile, could be invoked with <(..)")
flag.StringVar(&flagSalt, "salt", "", "add salt to encoded keyparam")
flag.BoolVar(&flagVer, "v", false, "show version")
flag.BoolVar(&flagLogPretty, "pretty", false, "log message in human readable format (the original log is json)")
flag.StringVar(&flagUsr, "usr", "", "username, use basic auth for authentication if user and password are set")
flag.StringVar(&flagPasswd, "passwd", "", "password, use basic auth for authentication if user and password are set")
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage: gterm [options]\n")
flag.PrintDefaults()
}
}
func main() {
flag.Parse()
if flagVer {
fmt.Printf("%v - %v\n", Version, Build)
return
}
if flagProfile {
fmt.Println(gterm.BashProfile)
return
}
zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
zerolog.SetGlobalLevel(zerolog.Level(flagLogLevel))
if flagLogPretty {
log.Logger = log.Output(zerolog.ConsoleWriter{
Out: os.Stdout,
TimeFormat: "2006/01/02 15:04:05",
})
}
if flagDev {
log.Logger = log.With().Caller().Logger()
}
log.Logger = log.With().Str("mod", "gtrem").Logger()
g := gterm.New()
g.AppName = flagAppName
g.Cmd = flagShell
g.Args = flagArgs
g.Dir = flagDir
g.Salt = flagSalt
gd := guard.New()
if flagAllowIPNet != "" {
_, ipnet, err := net.ParseCIDR(flagAllowIPNet)
if err != nil {
log.Panic().Err(err).Msg("")
}
gd.AllowIPNet = ipnet
}
if flagUsr != "" && flagPasswd != "" {
gd.SetBasicAuth(flagUsr, flagPasswd)
}
server := &http.Server{
Addr: flagAddr,
Handler: gd.Guard(g),
}
log.Info().Msgf("gterm starting at %s", flagAddr)
err := server.ListenAndServe()
if err != nil {
panic(err)
}
}

7
go.mod
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@ -1,18 +1,15 @@
module kumoly.io/tools/gterm module kumoly.io/tools/goshell
go 1.17 go 1.17
require ( require (
github.com/creack/pty v1.1.17 github.com/creack/pty v1.1.17
github.com/gorilla/websocket v1.4.2 github.com/gorilla/websocket v1.4.2
github.com/rs/zerolog v1.26.0 kumoly.io/lib/klog v0.0.8
kumoly.io/lib/guard v0.1.1
kumoly.io/lib/ksrv v0.0.2-0.20211112060911-0d61b343a298 kumoly.io/lib/ksrv v0.0.2-0.20211112060911-0d61b343a298
kumoly.io/lib/xorencrypt v0.1.0
) )
require ( require (
github.com/mattn/go-isatty v0.0.14 // indirect github.com/mattn/go-isatty v0.0.14 // indirect
golang.org/x/sys v0.0.0-20211103235746-7861aae1554b // indirect golang.org/x/sys v0.0.0-20211103235746-7861aae1554b // indirect
kumoly.io/lib/klog v0.0.8 // indirect
) )

35
go.sum
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@ -1,48 +1,13 @@
github.com/coreos/go-systemd/v22 v22.3.2/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
github.com/creack/pty v1.1.17 h1:QeVUsEDNrLBW4tMgZHvxy18sKtr6VI492kBhUfhDJNI= github.com/creack/pty v1.1.17 h1:QeVUsEDNrLBW4tMgZHvxy18sKtr6VI492kBhUfhDJNI=
github.com/creack/pty v1.1.17/go.mod h1:MOBLtS5ELjhRRrroQr9kyvTxUAFNvYEK993ew/Vr4O4= github.com/creack/pty v1.1.17/go.mod h1:MOBLtS5ELjhRRrroQr9kyvTxUAFNvYEK993ew/Vr4O4=
github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc= github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE= github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y= github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y=
github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94= github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/rs/xid v1.3.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
github.com/rs/zerolog v1.26.0 h1:ORM4ibhEZeTeQlCojCK2kPz1ogAY4bGs4tD+SaAdGaE=
github.com/rs/zerolog v1.26.0/go.mod h1:yBiM87lvSqX8h0Ww4sdzNSkVYZ8dL2xjZJG1lAuGZEo=
github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20211103235746-7861aae1554b h1:1VkfZQv42XQlA/jchYumAnv1UPo6RgF9rJFkTgZIxO4= golang.org/x/sys v0.0.0-20211103235746-7861aae1554b h1:1VkfZQv42XQlA/jchYumAnv1UPo6RgF9rJFkTgZIxO4=
golang.org/x/sys v0.0.0-20211103235746-7861aae1554b/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/sys v0.0.0-20211103235746-7861aae1554b/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.1.7/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
kumoly.io/lib/guard v0.1.0 h1:PvFM0bcWbgfZQv4QfRwDmrK9FAjv9QYwfJY3Ffg6JA0=
kumoly.io/lib/guard v0.1.0/go.mod h1:yWg9RDSI6YXkOPmP6Ad93aMqzlxhgW8LOe/ZRjjYX3U=
kumoly.io/lib/guard v0.1.1 h1:aUcn0qVtX6TqRhp7bWSjIRlbWRWtuK0cjCArILTbAcY=
kumoly.io/lib/guard v0.1.1/go.mod h1:yWg9RDSI6YXkOPmP6Ad93aMqzlxhgW8LOe/ZRjjYX3U=
kumoly.io/lib/klog v0.0.8 h1:6hTfDlZh7KGnPrd2tUrauCKRImSnyyN9DHXpey3Czn8= kumoly.io/lib/klog v0.0.8 h1:6hTfDlZh7KGnPrd2tUrauCKRImSnyyN9DHXpey3Czn8=
kumoly.io/lib/klog v0.0.8/go.mod h1:Snm+c1xRrh/RbXsxQf7UGYbAJGPcIa6bEEN+CmzJh7M= kumoly.io/lib/klog v0.0.8/go.mod h1:Snm+c1xRrh/RbXsxQf7UGYbAJGPcIa6bEEN+CmzJh7M=
kumoly.io/lib/ksrv v0.0.2-0.20211112060911-0d61b343a298 h1:0raqoIXmNpD6s1SrJbieAyIIkDyhe+aqfaXvx8wenrI= kumoly.io/lib/ksrv v0.0.2-0.20211112060911-0d61b343a298 h1:0raqoIXmNpD6s1SrJbieAyIIkDyhe+aqfaXvx8wenrI=
kumoly.io/lib/ksrv v0.0.2-0.20211112060911-0d61b343a298/go.mod h1:pwd+NspxnoxPJAETRY2V4i2qZc+orKLxvWzGUBiqBW8= kumoly.io/lib/ksrv v0.0.2-0.20211112060911-0d61b343a298/go.mod h1:pwd+NspxnoxPJAETRY2V4i2qZc+orKLxvWzGUBiqBW8=
kumoly.io/lib/xorencrypt v0.1.0 h1:VssGocaBAPyLn+QURVY8FdFYRBmwFr26z7ame0zwV44=
kumoly.io/lib/xorencrypt v0.1.0/go.mod h1:+L3JtdD/CTlcXvE8X7AvOJBVbN16qvnxxv3zIWPZgQM=

362
gterm.go
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@ -1,362 +0,0 @@
package gterm
import (
"bytes"
_ "embed"
"encoding/json"
"fmt"
"net/http"
"os"
"os/exec"
"strings"
"time"
"github.com/creack/pty"
"github.com/gorilla/websocket"
"github.com/rs/zerolog/log"
"kumoly.io/lib/ksrv"
"kumoly.io/lib/ksrv/engine"
"kumoly.io/lib/xorencrypt"
"kumoly.io/tools/gterm/public"
)
//go:embed public/index.html
var index string
//go:embed profile
var BashProfile string
var tmpl *engine.Engine
var servePublic = http.FileServer(http.FS(public.FS))
var pool map[string]chan struct{}
var locks map[string]chan struct{}
func init() {
tmpl = engine.Must(engine.New("").Parse(index))
pool = map[string]chan struct{}{}
locks = map[string]chan struct{}{}
}
type GTerm struct {
AppName string
// Arguments is a list of strings to pass as arguments to the specified Command
Args []string
// Command is the path to the binary we should create a TTY for
Cmd string
// Dir working dir
Dir string
// Envs env pairs to pass to the command
Envs []string
// ErrorLimit defines the number of consecutive errors that can happen
// before a connection is considered unusable
ErrorLimit int
// Timeout defines the maximum duration between which a ping and pong
// cycle should be tolerated, beyond this the connection should be deemed dead
Timeout time.Duration
BufferSize int
Salt string
}
func New() *GTerm {
// if g.Cmd == "" {
// g.Cmd = "bash"
// }
// if len(g.Envs) == 0 {
// g.Envs = os.Environ()
// }
// if g.Timeout < time.Second {
// g.Timeout = 20 * time.Second
// }
// if g.ErrorLimit == 0 {
// g.ErrorLimit = 10
// }
// if g.BufferSize == 0 {
// g.BufferSize = 512
// }
go func() {
//print pool
for {
cons := []string{}
for k := range pool {
cons = append(cons, k)
}
log.Info().Interface("connections", cons).Msg("")
time.Sleep(5 * time.Minute)
}
}()
return &GTerm{
AppName: "GTERM",
Cmd: "bash",
Envs: append(os.Environ(), "TERM=xterm-256color"),
Timeout: 20 * time.Second,
ErrorLimit: 10,
BufferSize: 512,
}
}
func (g *GTerm) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if strings.HasPrefix(r.URL.String(), "/ws") {
g.WS(w, r)
} else {
g.App(w, r)
}
}
type App struct {
AppName string
}
func (g *GTerm) App(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/" {
tmpl.Execute(w, App{g.AppName})
return
}
file, err := public.FS.Open(strings.TrimPrefix(r.URL.String(), "/"))
if err != nil {
// tmpl.Execute(w, App{g.AppName})
http.NotFound(w, r)
return
}
stat, err := file.Stat()
if err != nil || stat.IsDir() {
// tmpl.Execute(w, App{g.AppName})
http.NotFound(w, r)
return
}
servePublic.ServeHTTP(w, r)
}
type NewCmdRequest struct {
Cmd string `json:"cmd"`
Envs []string `json:"envs"`
Args []string `json:"args"`
Dir string `json:"dir"`
Block bool `json:"block"`
}
func (g *GTerm) defaultCmd() *exec.Cmd {
cmd := exec.Command(g.Cmd, g.Args...)
cmd.Env = g.Envs
if g.Dir != "" && g.Dir != "." {
cmd.Dir = g.Dir
}
return cmd
}
func (g *GTerm) echo(msg string) *exec.Cmd {
cmd := exec.Command("echo", msg)
cmd.Env = g.Envs
return cmd
}
func (g *GTerm) WS(w http.ResponseWriter, r *http.Request) {
id := fmt.Sprintf("[%02d] %s", ctr(), ksrv.GetIP(r))
pool[id] = make(chan struct{}, 1)
defer func() {
close(pool[id])
delete(pool, id)
}()
l := log.With().Str("id", id).Logger()
var cmd *exec.Cmd
if newCmd := r.URL.Query().Get("cmd"); newCmd != "" {
param, _ := xorencrypt.Decrypt(newCmd, g.Salt)
req := &NewCmdRequest{}
err := json.Unmarshal([]byte(param), req)
if err != nil {
l.Error().Err(err).Str("base", newCmd).Str("decrypt", param).Msg("cmd decode failed")
cmd = g.echo("cmd decode failed")
} else {
cmd = exec.Command(req.Cmd, req.Args...)
cmd.Env = append(req.Envs, "TERM=xterm-256color")
cmd.Dir = req.Dir
if req.Block {
lock, ok := locks[newCmd]
if !ok {
locks[newCmd] = make(chan struct{}, 1)
}
if len(lock) == 1 {
cmd = g.echo("cmd already running")
} else {
l.Info().Interface("cmd", req).Msg("starting cmd")
locks[newCmd] <- struct{}{}
defer func() {
<-locks[newCmd]
close(locks[newCmd])
delete(locks, newCmd)
}()
}
}
}
} else {
cmd = g.defaultCmd()
}
upgrader := websocket.Upgrader{
HandshakeTimeout: 0,
ReadBufferSize: g.BufferSize,
WriteBufferSize: g.BufferSize,
}
conn, err := upgrader.Upgrade(w, r, nil)
if err != nil {
l.Error().Err(err).Msg("upgrade error")
return
}
l.Info().Msg("connection established.")
tty, err := pty.Start(cmd)
if err != nil {
l.Error().Err(err).Msg("start tty error")
conn.WriteMessage(websocket.TextMessage, []byte(err.Error()))
}
defer func() {
if err := cmd.Process.Kill(); err != nil {
l.Error().Err(err).Msg("proccess kill error")
}
if _, err := cmd.Process.Wait(); err != nil {
l.Error().Err(err).Msg("proccess wait error")
}
if err := tty.Close(); err != nil {
l.Error().Err(err).Msg("tty close error")
}
if err := conn.Close(); err != nil {
l.Error().Err(err).Msg("conn close error")
}
}()
var connectionClosed bool
waiter := make(chan struct{}, 1)
// this is a keep-alive loop that ensures connection does not hang-up itself
lastPongTime := time.Now()
conn.SetPongHandler(func(msg string) error {
lastPongTime = time.Now()
return nil
})
go func() {
for {
if err := conn.WriteMessage(websocket.PingMessage, []byte("keepalive")); err != nil {
l.Warn().Msg("failed to write ping message")
return
}
time.Sleep(g.Timeout / 2)
if time.Since(lastPongTime) > g.Timeout {
l.Warn().Msg("failed to get response from ping, triggering disconnect now...")
waiter <- struct{}{}
return
}
l.Debug().Msg("received response from ping successfully")
}
}()
// tty >> xterm.js
go func() {
errorCounter := 0
for {
// consider the connection closed/errored out so that the socket handler
// can be terminated - this frees up memory so the service doesn't get
// overloaded
if errorCounter > g.ErrorLimit {
waiter <- struct{}{}
break
}
buffer := make([]byte, g.BufferSize)
readLength, err := tty.Read(buffer)
if err != nil {
l.Warn().Err(err).Msg("failed to read from tty")
if err := conn.WriteMessage(websocket.TextMessage, []byte("bye!")); err != nil {
l.Warn().Err(err).Msg("failed to send termination message from tty to xterm.js")
}
waiter <- struct{}{}
return
}
if err := conn.WriteMessage(websocket.BinaryMessage, buffer[:readLength]); err != nil {
l.Warn().Msgf("failed to send %s bytes from tty to xterm.js", readLength)
errorCounter++
continue
}
l.Debug().Msgf("sent message of size %s bytes from tty to xterm.js", readLength)
errorCounter = 0
}
}()
// tty << xterm.js
go func() {
for {
// data processing
messageType, data, err := conn.ReadMessage()
if err != nil {
if !connectionClosed {
l.Warn().Err(err).Msg("failed to get next reader")
}
return
}
dataLength := len(data)
dataBuffer := bytes.Trim(data, "\x00")
dataType, ok := WebsocketMessageType[messageType]
if !ok {
dataType = "uunknown"
}
l.Debug().Msgf("received %s (type: %v) message of size %v byte(s) from xterm.js with key sequence: %v", dataType, messageType, dataLength, dataBuffer)
// process
if dataLength == -1 { // invalid
l.Warn().Msg("failed to get the correct number of bytes read, ignoring message")
continue
}
// handle resizing
if messageType == websocket.BinaryMessage {
if dataBuffer[0] == 1 {
ttySize := &TTYSize{}
resizeMessage := bytes.Trim(dataBuffer[1:], " \n\r\t\x00\x01")
if err := json.Unmarshal(resizeMessage, ttySize); err != nil {
l.Warn().Err(err).Msgf("failed to unmarshal received resize message '%s'", string(resizeMessage))
continue
}
l.Debug().Int("rows", int(ttySize.Rows)).Int("columns", int(ttySize.Cols)).Msg("resizing tty...")
if err := pty.Setsize(tty, &pty.Winsize{
Rows: ttySize.Rows,
Cols: ttySize.Cols,
}); err != nil {
l.Warn().Err(err).Msg("failed to resize tty")
}
continue
}
}
// write to tty
bytesWritten, err := tty.Write(dataBuffer)
if err != nil {
l.Warn().Err(err).Msgf("failed to write %v bytes to tty", len(dataBuffer))
continue
}
l.Debug().Msgf("%d bytes written to tty...", bytesWritten)
}
}()
<-waiter
close(waiter)
l.Info().Msg("closing connection...")
connectionClosed = true
}
var WebsocketMessageType = map[int]string{
websocket.BinaryMessage: "binary",
websocket.TextMessage: "text",
websocket.CloseMessage: "close",
websocket.PingMessage: "ping",
websocket.PongMessage: "pong",
}
// TTYSize represents a JSON structure to be sent by the frontend
// xterm.js implementation to the xterm.js websocket handler
type TTYSize struct {
Cols uint16 `json:"cols"`
Rows uint16 `json:"rows"`
X uint16 `json:"x"`
Y uint16 `json:"y"`
}

View File

@ -1,47 +1 @@
<!DOCTYPE html> <!DOCTYPE html><html lang=""><head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width,initial-scale=1"><link rel="icon" href="favicon.ico"><title>{{.AppName}}</title><link href="css/app.0e433876.css" rel="preload" as="style"><link href="css/chunk-vendors.78de0e90.css" rel="preload" as="style"><link href="js/app.5bd01a68.js" rel="preload" as="script"><link href="js/chunk-vendors.3d58276e.js" rel="preload" as="script"><link href="css/chunk-vendors.78de0e90.css" rel="stylesheet"><link href="css/app.0e433876.css" rel="stylesheet"></head><body><noscript><strong>We're sorry but {{.AppName}} doesn't work properly without JavaScript enabled. Please enable it to continue.</strong></noscript><div id="app"></div><script src="js/chunk-vendors.3d58276e.js"></script><script src="js/app.5bd01a68.js"></script></body></html>
<html>
<head>
<title>{{.AppName}}</title>
<style>
html::-webkit-scrollbar,
body::-webkit-scrollbar,
div::-webkit-scrollbar {
display: none;
width: 0;
}
html,
body {
margin: 0;
overflow: hidden;
padding: 0;
}
div#terminal {
height: 100%;
left: 0;
position: absolute;
top: 0;
width: 100%;
}
div#terminal div {
height: 100%;
}
.xterm-viewport,
.xterm-screen {
height: 100%;
margin: 0;
padding: 0;
}
</style>
</head>
<body>
<div id="terminal"></div>
<script type="module" src="./main.js"></script>
</body>
</html>

95
main.go Normal file
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package main
import (
_ "embed"
"flag"
"net/http"
"os"
"os/exec"
"strings"
"github.com/creack/pty"
"github.com/gorilla/websocket"
"kumoly.io/lib/klog"
"kumoly.io/lib/ksrv"
"kumoly.io/lib/ksrv/engine"
"kumoly.io/tools/goshell/public"
)
//go:embed index.html
var index string
var tmpl *engine.Engine
var servePublic = http.FileServer(http.FS(public.FS))
var (
flagAppName string
flagAddr string
flagShell string
)
func init() {
flag.StringVar(&flagAddr, "addr", ":8000", "address to bind")
flag.StringVar(&flagShell, "shell", "bash", "the shell behind")
}
func main() {
flag.Parse()
server := ksrv.New()
mux := http.NewServeMux()
tmpl = engine.Must(engine.New("").Parse(index))
mux.HandleFunc("/", func(rw http.ResponseWriter, r *http.Request) {
if r.URL.String() == "/" {
tmpl.Execute(rw, App{flagAppName})
return
}
file, err := public.FS.Open(strings.TrimPrefix(r.URL.String(), "/"))
if err != nil {
klog.Debug(err)
tmpl.Execute(rw, App{flagAppName})
return
}
stat, err := file.Stat()
if err != nil || stat.IsDir() {
klog.Debug(err)
tmpl.Execute(rw, App{flagAppName})
return
}
servePublic.ServeHTTP(rw, r)
})
server.Handle(mux).Listen(flagAddr).Serve()
}
type App struct {
AppName string
}
type windowSize struct {
Rows uint16 `json:"rows"`
Cols uint16 `json:"cols"`
X uint16
Y uint16
}
var upgrader = websocket.Upgrader{
ReadBufferSize: 1024,
WriteBufferSize: 1024,
}
func handleWebsocket(w http.ResponseWriter, r *http.Request) {
l := klog.Sub(ksrv.GetIP(r))
conn, err := upgrader.Upgrade(w, r, nil)
if err != nil {
l.Error("Unable to upgrade connection, err: ", err)
return
}
cmd := exec.Command("/bin/bash", "-l")
cmd.Env = append(os.Environ(), "TERM=xterm")
pty.Winsize
}

60
main.js
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@ -1,60 +0,0 @@
import { Terminal } from 'xterm'
import { AttachAddon } from 'xterm-addon-attach';
import { FitAddon } from 'xterm-addon-fit';
import { SerializeAddon } from "xterm-addon-serialize";
import { Unicode11Addon } from 'xterm-addon-unicode11';
import { WebLinksAddon } from 'xterm-addon-web-links';
import 'xterm/css/xterm.css'
(function() {
const terminal = new Terminal({
// screenKeys: true,
// useStyle: true,
// cursorBlink: true,
// fullscreenWin: true,
// maximizeWin: true,
// screenReaderMode: true,
});
const fitAddon = new FitAddon();
terminal.loadAddon(fitAddon);
var protocol = (location.protocol === "https:") ? "wss://" : "ws://";
var url = protocol + location.host + location.pathname + "ws" + location.search
const ws = new WebSocket(url);
const attachAddon = new AttachAddon(ws);
const webLinksAddon = new WebLinksAddon();
terminal.loadAddon(webLinksAddon);
const unicode11Addon = new Unicode11Addon();
terminal.loadAddon(unicode11Addon);
const serializeAddon = new SerializeAddon();
terminal.loadAddon(serializeAddon);
terminal.open(document.getElementById("terminal"));
ws.onclose = function(event) {
console.log(event);
terminal.write('\r\n\nconnection has been terminated from the server-side (hit refresh to restart)\n')
};
ws.onopen = function() {
terminal.loadAddon(attachAddon);
terminal._initialized = true;
terminal.focus();
setTimeout(function() {fitAddon.fit()});
document.addEventListener('keypress',(e)=>{
e.preventDefault();
})
terminal.onResize(function(event) {
var rows = event.rows;
var cols = event.cols;
var size = JSON.stringify({cols: cols, rows: rows + 1});
var send = new TextEncoder().encode("\x01" + size);
console.log('resizing to', size);
ws.send(send);
});
terminal.onTitleChange(function(event) {
console.log(event);
});
window.onresize = function() {
console.log("resize")
fitAddon.fit();
};
fitAddon.fit();
};
})();

31
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VERSION=$(git describe --tags --abbrev=0)
if [ $? -ne 0 ]; then VERSION=$DRONE_TAG; fi
BUILD=$(git rev-parse --short HEAD)
if [ $? -ne 0 ]; then BUILD=${DRONE_COMMIT:0:7}; fi
PROJ=gterm
DIST=dist
LDFLAGS="-ldflags \"-X main.Version=${VERSION} -X main.Build=${BUILD} -w -s\""
FAILURES=""
PLATFORMS="darwin/amd64 darwin/arm64"
PLATFORMS="$PLATFORMS linux/amd64"
PLATFORMS="$PLATFORMS linux/s390x"
for PLATFORM in $PLATFORMS; do
GOOS=${PLATFORM%/*}
GOARCH=${PLATFORM#*/}
BIN_FILENAME="${PROJ}"
CMD="CGO_ENABLED=0 GOOS=${GOOS} GOARCH=${GOARCH} go build ${LDFLAGS} -o ${DIST}/${BIN_FILENAME} cmd/gterm/main.go"
echo "${CMD}"
eval $CMD || FAILURES="${FAILURES} ${PLATFORM}"
sh -c "cd ${DIST} && tar -czf ${PROJ}-${VERSION}-${GOOS}-${GOARCH}.tar.gz ${BIN_FILENAME} && rm ${BIN_FILENAME}"
done
if [[ "${FAILURES}" != "" ]]; then
echo ""
echo "${SCRIPT_NAME} failed on: ${FAILURES}"
exit 1
fi

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@ -1,26 +0,0 @@
{
"name": "gterm",
"version": "1.0.0",
"repository": "git@kumoly.io:tools/gterm.git",
"author": "Evan Chen <evanchen@kumoly.io>",
"license": "MIT",
"scripts": {
"build":"rm public/*.js public/*.css && yarn parcel build index.html"
},
"dependencies": {
"parcel": "^2.0.1",
"xterm": "^4.15.0",
"xterm-addon-attach": "^0.6.0",
"xterm-addon-fit": "^0.5.0",
"xterm-addon-serialize": "^0.6.1",
"xterm-addon-unicode11": "^0.3.0",
"xterm-addon-web-links": "^0.4.0"
},
"targets":{
"default":{
"distDir":"public",
"publicUrl":"./",
"sourceMap": false
}
}
}

31
profile
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@ -1,31 +0,0 @@
export LSCOLORS="gxfxcxdxbxegedabagacad"
export CLICOLOR=1
export TERM="xterm-256color"
PS1='\[\e[0;33m\]\u\[\e[0m\]@\[\e[0;32m\]\h\[\e[0m\]:\[\033[01;34m\]\w\[\033[00m\]$(git_info)\[\033[00m\]\n\[\033[1;31m\]\$ \[\033[00m\]'
# functions
function git_info {
ref=$(git symbolic-ref HEAD 2> /dev/null) || return;
# Check for uncommitted changes in the index
if ! $(git diff --quiet --ignore-submodules --cached); then
uc=" $(tput setaf 64)+"
fi
# Check for unstaged changes
if ! $(git diff-files --quiet --ignore-submodules --); then
us=" $(tput setaf 124)!"
fi
# Check for untracked files
if [ -n "$(git ls-files --others --exclude-standard)" ]; then
ut=" $(tput setaf 166)?"
fi
# Check for stashed files
if $(git rev-parse --verify refs/stash &>/dev/null); then
st=" $(tput setaf 136)$"
fi
echo " ($(tput bold)${ref#refs/heads/}$uc$us$ut$st$(tput sgr0)$(tput setaf 254))";
# echo "(${ref#refs/heads/})";
}

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@ -0,0 +1 @@
.xterm{position:relative;-moz-user-select:none;user-select:none;-ms-user-select:none;-webkit-user-select:none}.xterm.focus,.xterm:focus{outline:none}.xterm .xterm-helpers{position:absolute;top:0;z-index:5}.xterm .xterm-helper-textarea{padding:0;border:0;margin:0;position:absolute;opacity:0;left:-9999em;top:0;width:0;height:0;z-index:-5;white-space:nowrap;overflow:hidden;resize:none}.xterm .composition-view{background:#000;color:#fff;display:none;position:absolute;white-space:nowrap;z-index:1}.xterm .composition-view.active{display:block}.xterm .xterm-viewport{background-color:#000;overflow-y:scroll;cursor:default;position:absolute;right:0;left:0;top:0;bottom:0}.xterm .xterm-screen{position:relative}.xterm .xterm-screen canvas{position:absolute;left:0;top:0}.xterm .xterm-scroll-area{visibility:hidden}.xterm-char-measure-element{display:inline-block;visibility:hidden;position:absolute;top:0;left:-9999em;line-height:normal}.xterm{cursor:text}.xterm.enable-mouse-events{cursor:default}.xterm.xterm-cursor-pointer{cursor:pointer}.xterm.column-select.focus{cursor:crosshair}.xterm .xterm-accessibility,.xterm .xterm-message{position:absolute;left:0;top:0;bottom:0;right:0;z-index:10;color:transparent}.xterm .live-region{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}.xterm-dim{opacity:.5}.xterm-underline{text-decoration:underline}.xterm-strikethrough{text-decoration:line-through}

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@ -2,5 +2,5 @@ package public
import "embed" import "embed"
//go:embed * //go:embed js favicon.ico
var FS embed.FS var FS embed.FS

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@ -1 +0,0 @@
.xterm{position:relative;user-select:none;-ms-user-select:none;-webkit-user-select:none}.xterm.focus,.xterm:focus{outline:none}.xterm .xterm-helpers{position:absolute;top:0;z-index:5}.xterm .xterm-helper-textarea{border:0;height:0;left:-9999em;margin:0;opacity:0;overflow:hidden;padding:0;position:absolute;resize:none;top:0;white-space:nowrap;width:0;z-index:-5}.xterm .composition-view{background:#000;color:#fff;display:none;position:absolute;white-space:nowrap;z-index:1}.xterm .composition-view.active{display:block}.xterm .xterm-viewport{background-color:#000;bottom:0;cursor:default;left:0;overflow-y:scroll;position:absolute;right:0;top:0}.xterm .xterm-screen{position:relative}.xterm .xterm-screen canvas{left:0;position:absolute;top:0}.xterm .xterm-scroll-area{visibility:hidden}.xterm-char-measure-element{display:inline-block;left:-9999em;line-height:normal;position:absolute;top:0;visibility:hidden}.xterm{cursor:text}.xterm.enable-mouse-events{cursor:default}.xterm.xterm-cursor-pointer{cursor:pointer}.xterm.column-select.focus{cursor:crosshair}.xterm .xterm-accessibility,.xterm .xterm-message{bottom:0;color:transparent;left:0;position:absolute;right:0;top:0;z-index:10}.xterm .live-region{height:1px;left:-9999px;overflow:hidden;position:absolute;width:1px}.xterm-dim{opacity:.5}.xterm-underline{text-decoration:underline}.xterm-strikethrough{text-decoration:line-through}

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@ -1 +0,0 @@
<!DOCTYPE html><html><head><link rel="stylesheet" href="index.6999253a.css"><title>{{.AppName}}</title><style>body::-webkit-scrollbar,div::-webkit-scrollbar,html::-webkit-scrollbar{display:none;width:0}body,html{margin:0;overflow:hidden;padding:0}div#terminal{height:100%;left:0;position:absolute;top:0;width:100%}div#terminal div{height:100%}.xterm-screen,.xterm-viewport{height:100%;margin:0;padding:0}</style></head><body> <div id="terminal"></div> <script type="module" src="index.a2a226ad.js"></script> </body></html>

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@ -0,0 +1,2 @@
(function(e){function t(t){for(var r,c,a=t[0],i=t[1],p=t[2],l=0,s=[];l<a.length;l++)c=a[l],Object.prototype.hasOwnProperty.call(o,c)&&o[c]&&s.push(o[c][0]),o[c]=0;for(r in i)Object.prototype.hasOwnProperty.call(i,r)&&(e[r]=i[r]);f&&f(t);while(s.length)s.shift()();return u.push.apply(u,p||[]),n()}function n(){for(var e,t=0;t<u.length;t++){for(var n=u[t],r=!0,a=1;a<n.length;a++){var i=n[a];0!==o[i]&&(r=!1)}r&&(u.splice(t--,1),e=c(c.s=n[0]))}return e}var r={},o={app:0},u=[];function c(t){if(r[t])return r[t].exports;var n=r[t]={i:t,l:!1,exports:{}};return e[t].call(n.exports,n,n.exports,c),n.l=!0,n.exports}c.m=e,c.c=r,c.d=function(e,t,n){c.o(e,t)||Object.defineProperty(e,t,{enumerable:!0,get:n})},c.r=function(e){"undefined"!==typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"__esModule",{value:!0})},c.t=function(e,t){if(1&t&&(e=c(e)),8&t)return e;if(4&t&&"object"===typeof e&&e&&e.__esModule)return e;var n=Object.create(null);if(c.r(n),Object.defineProperty(n,"default",{enumerable:!0,value:e}),2&t&&"string"!=typeof e)for(var r in e)c.d(n,r,function(t){return e[t]}.bind(null,r));return n},c.n=function(e){var t=e&&e.__esModule?function(){return e["default"]}:function(){return e};return c.d(t,"a",t),t},c.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},c.p="";var a=window["webpackJsonp"]=window["webpackJsonp"]||[],i=a.push.bind(a);a.push=t,a=a.slice();for(var p=0;p<a.length;p++)t(a[p]);var f=i;u.push([0,"chunk-vendors"]),n()})({0:function(e,t,n){e.exports=n("56d7")},"0ae4":function(e,t,n){},"56d7":function(e,t,n){"use strict";n.r(t);n("e260"),n("e6cf"),n("cca6"),n("a79d");var r=n("7a23");function o(e,t,n,o,u,c){var a=Object(r["e"])("XTerm");return Object(r["d"])(),Object(r["b"])(a)}function u(e,t,n,o,u,c){return Object(r["d"])(),Object(r["c"])("h1",null,"TEST")}var c={},a=(n("9a49"),n("6b0d")),i=n.n(a);const p=i()(c,[["render",u]]);var f=p,l={name:"App",components:{XTerm:f}};const s=i()(l,[["render",o]]);var d=s;Object(r["a"])(d).mount("#app")},"9a49":function(e,t,n){"use strict";n("0ae4")}});
//# sourceMappingURL=app.5bd01a68.js.map

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3
src/.browserslistrc Normal file
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@ -0,0 +1,3 @@
> 1%
last 2 versions
not dead

17
src/.eslintrc.js Normal file
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module.exports = {
root: true,
env: {
node: true
},
'extends': [
'plugin:vue/vue3-essential',
'eslint:recommended'
],
parserOptions: {
parser: 'babel-eslint'
},
rules: {
'no-console': process.env.NODE_ENV === 'production' ? 'warn' : 'off',
'no-debugger': process.env.NODE_ENV === 'production' ? 'warn' : 'off'
}
}

23
src/.gitignore vendored Normal file
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@ -0,0 +1,23 @@
.DS_Store
node_modules
/dist
# local env files
.env.local
.env.*.local
# Log files
npm-debug.log*
yarn-debug.log*
yarn-error.log*
pnpm-debug.log*
# Editor directories and files
.idea
.vscode
*.suo
*.ntvs*
*.njsproj
*.sln
*.sw?

24
src/README.md Normal file
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# src
## Project setup
```
yarn install
```
### Compiles and hot-reloads for development
```
yarn serve
```
### Compiles and minifies for production
```
yarn build
```
### Lints and fixes files
```
yarn lint
```
### Customize configuration
See [Configuration Reference](https://cli.vuejs.org/config/).

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src/babel.config.js Normal file
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module.exports = {
presets: [
'@vue/cli-plugin-babel/preset'
]
}

29
src/package.json Normal file
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{
"name": "src",
"version": "0.1.0",
"private": true,
"scripts": {
"serve": "vue-cli-service serve",
"build": "vue-cli-service build",
"lint": "vue-cli-service lint"
},
"dependencies": {
"core-js": "^3.6.5",
"vue": "^3.0.0",
"xterm": "^4.15.0",
"xterm-addon-fit": "^0.5.0",
"xterm-addon-search": "^0.8.1"
},
"devDependencies": {
"@vue/cli-plugin-babel": "~4.5.0",
"@vue/cli-plugin-eslint": "~4.5.0",
"@vue/cli-service": "~4.5.0",
"@vue/compiler-sfc": "^3.0.0",
"babel-eslint": "^10.1.0",
"eslint": "^6.7.2",
"eslint-plugin-vue": "^7.0.0",
"sass": "^1.26.5",
"sass-loader": "^8.0.2",
"vue-cli-plugin-pug": "~2.0.0"
}
}

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src/public/fs.go Normal file
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package public
import "embed"
//go:embed css js favicon.ico
var FS embed.FS

17
src/public/index.html Normal file
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<!DOCTYPE html>
<html lang="">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
<link rel="icon" href="<%= BASE_URL %>favicon.ico">
<title>{{.AppName}}</title>
</head>
<body>
<noscript>
<strong>We're sorry but {{.AppName}} doesn't work properly without JavaScript enabled. Please enable it to continue.</strong>
</noscript>
<div id="app"></div>
<!-- built files will be auto injected -->
</body>
</html>

17
src/src/App.vue Normal file
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<template lang="pug">
XTerm
</template>
<script>
import XTerm from './components/XTerm.vue'
export default {
name: 'App',
components: {
XTerm
}
}
</script>
<style lang="scss">
</style>

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<template lang="pug">
.console#terminal
</template>
<script>
import {Terminal} from 'xterm'
import {FitAddon} from 'xterm-addon-fit'
export default {
data () {
return {
term: null,
terminalSocket: null,
fitaddon: null
}
},
mounted(){
console.log("mounted")
let terminalContainer = document.getElementById('terminal')
this.term = new Terminal()
this.fitaddon = new FitAddon()
this.term.loadAddon(this.fitaddon)
this.term.open(terminalContainer)
this.fitaddon.fit()
this.term.write('Hello from \x1B[1;3;31mxterm.js\x1B[0m $ ')
console.log(this.term)
},
Unmounted () {
this.term.dispose()
},
methods:{
}
}
</script>
<style lang="scss">
@import '~xterm/css/xterm.css';
.console {
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
}
</style>

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src/src/main.js Normal file
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import { createApp } from 'vue'
import App from './App.vue'
createApp(App).mount('#app')

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src/vue.config.js Normal file
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module.exports = {
publicPath: "",
outputDir: "../public",
indexPath: "../index.html",
devServer: {
proxy: 'http://localhost:8000'
}
}

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src/yarn.lock Normal file

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util.go
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package gterm
import "sync"
var curCtr = 0
var ctrLck sync.Mutex
func ctr() int {
ctrLck.Lock()
defer ctrLck.Unlock()
if curCtr >= 99 {
curCtr = 0
}
curCtr++
return curCtr
}

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yarn.lock

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