From f0e7f9c026739ab36efd9153d60f0935882a01b8 Mon Sep 17 00:00:00 2001 From: Charlie Moog Date: Wed, 3 Jun 2020 17:15:51 -0500 Subject: [PATCH 1/4] Use wsep for coder sh --- cmd/coder/shell.go | 64 ++++----- go.mod | 10 +- go.sum | 264 +++++++++++++++++++++++++++++++++++++- internal/entclient/env.go | 28 ++++ 4 files changed, 326 insertions(+), 40 deletions(-) diff --git a/cmd/coder/shell.go b/cmd/coder/shell.go index 286f1c20..c8d9ac30 100644 --- a/cmd/coder/shell.go +++ b/cmd/coder/shell.go @@ -16,8 +16,7 @@ import ( "go.coder.com/cli" "go.coder.com/flog" - client "cdr.dev/coder-cli/internal/entclient" - "cdr.dev/coder-cli/wush" + "cdr.dev/wsep" ) type shellCmd struct { @@ -45,7 +44,7 @@ func enableTerminal(fd int) (restore func(), err error) { }, nil } -func sendResizeEvents(termfd int, client *wush.Client) { +func sendResizeEvents(ctx context.Context, termfd int, process wsep.Process) { sigs := make(chan os.Signal, 16) signal.Notify(sigs, unix.SIGWINCH) @@ -53,21 +52,24 @@ func sendResizeEvents(termfd int, client *wush.Client) { resizeLimiter := rate.NewLimiter(rate.Every(time.Millisecond*100), 1) for { + if ctx.Err() != nil { + return + } width, height, err := terminal.GetSize(termfd) if err != nil { flog.Error("get term size: %v", err) return } - err = client.Resize(width, height) + err = process.Resize(ctx, uint16(height), uint16(width)) if err != nil { - flog.Error("get term size: %v", err) + flog.Error("set term size: %v", err) return } // Do this last so the first resize is sent. <-sigs - resizeLimiter.Wait(context.Background()) + resizeLimiter.Wait(ctx) } } @@ -78,6 +80,7 @@ func (cmd *shellCmd) Run(fl *pflag.FlagSet) { var ( envName = fl.Arg(0) command = fl.Arg(1) + ctx = context.Background() ) var args []string @@ -91,14 +94,16 @@ func (cmd *shellCmd) Run(fl *pflag.FlagSet) { args = []string{"-c", "exec $(getent passwd $(whoami) | awk -F: '{ print $7 }')"} } - exitCode, err := runCommand(envName, command, args) + err := runCommand(ctx, envName, command, args) + if exitErr, ok := err.(wsep.ExitError); ok { + os.Exit(exitErr.Code) + } if err != nil { flog.Fatal("run command: %v Is it online?", err) } - os.Exit(exitCode) } -func runCommand(envName string, command string, args []string) (int, error) { +func runCommand(ctx context.Context, envName string, command string, args []string) error { var ( entClient = requireAuth() env = findEnv(entClient, envName) @@ -110,38 +115,37 @@ func runCommand(envName string, command string, args []string) (int, error) { if tty { restore, err := enableTerminal(termfd) if err != nil { - return -1, err + return err } defer restore() } - conn, err := entClient.DialWush( - env, - &client.WushOptions{ - TTY: tty, - Stdin: true, - }, command, args...) + conn, err := entClient.DialWsep(ctx, env) + if err != nil { + return err + } + + execer := wsep.RemoteExecer(conn) + process, err := execer.Start(ctx, wsep.Command{ + Command: command, + Args: args, + TTY: tty, + }) if err != nil { - return -1, err + return err } - ctx := context.Background() - wc := wush.NewClient(ctx, conn) if tty { - go sendResizeEvents(termfd, wc) + go sendResizeEvents(ctx, termfd, process) } go func() { - defer wc.Stdin.Close() - io.Copy(wc.Stdin, os.Stdin) + stdin := process.Stdin() + defer stdin.Close() + io.Copy(stdin, os.Stdin) }() - go io.Copy(os.Stdout, wc.Stdout) - go io.Copy(os.Stderr, wc.Stderr) - - exitCode, err := wc.Wait() - if err != nil { - return -1, err - } + go io.Copy(os.Stdout, process.Stdout()) + go io.Copy(os.Stderr, process.Stderr()) - return int(exitCode), nil + return process.Wait() } diff --git a/go.mod b/go.mod index 36b82ea6..c7bfcc3c 100644 --- a/go.mod +++ b/go.mod @@ -3,10 +3,12 @@ module cdr.dev/coder-cli go 1.14 require ( + cdr.dev/wsep v0.0.0-20200602025116-5cbe721683df + github.com/fatih/color v1.9.0 // indirect github.com/gorilla/websocket v1.4.1 github.com/kirsle/configdir v0.0.0-20170128060238-e45d2f54772f - github.com/mattn/go-colorable v0.1.2 // indirect - github.com/mattn/go-isatty v0.0.12 // indirect + github.com/klauspost/compress v1.10.7 // indirect + github.com/mattn/go-colorable v0.1.6 // indirect github.com/pkg/browser v0.0.0-20180916011732-0a3d74bf9ce4 github.com/rjeczalik/notify v0.9.2 github.com/spf13/pflag v1.0.5 @@ -14,8 +16,8 @@ require ( go.coder.com/flog v0.0.0-20190906214207-47dd47ea0512 golang.org/x/crypto v0.0.0-20200422194213-44a606286825 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a - golang.org/x/sys v0.0.0-20200413165638-669c56c373c4 + golang.org/x/sys v0.0.0-20200523222454-059865788121 golang.org/x/time v0.0.0-20191024005414-555d28b269f0 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 - nhooyr.io/websocket v1.8.5 + nhooyr.io/websocket v1.8.6 ) diff --git a/go.sum b/go.sum index b4b4317a..7c65d44a 100644 --- a/go.sum +++ b/go.sum @@ -1,58 +1,310 @@ +cdr.dev/slog v1.3.0 h1:MYN1BChIaVEGxdS7I5cpdyMC0+WfJfK8BETAfzfLUGQ= +cdr.dev/slog v1.3.0/go.mod h1:C5OL99WyuOK8YHZdYY57dAPN1jK2WJlCdq2VP6xeQns= 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v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg= +nhooyr.io/websocket v1.8.6 h1:s+C3xAMLwGmlI31Nyn/eAehUlZPwfYZu2JXM621Q5/k= +nhooyr.io/websocket v1.8.6/go.mod h1:B70DZP8IakI65RVQ51MsWP/8jndNma26DVA/nFSCgW0= +rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8= diff --git a/internal/entclient/env.go b/internal/entclient/env.go index ce9dc5ae..6a5fb3bf 100644 --- a/internal/entclient/env.go +++ b/internal/entclient/env.go @@ -34,6 +34,34 @@ var defaultWushOptions = WushOptions{ Stdin: true, } +func (c Client) DialWsep(ctx context.Context, env Environment) (*websocket.Conn, error) { + u := c.copyURL() + if c.BaseURL.Scheme == "https" { + u.Scheme = "wss" + } else { + u.Scheme = "ws" + } + u.Path = "/proxy/environments/" + env.ID + "/wsep" + + ctx, cancel := context.WithTimeout(ctx, time.Second*15) + defer cancel() + + conn, resp, err := websocket.Dial(ctx, u.String(), + &websocket.DialOptions{ + HTTPHeader: map[string][]string{ + "Cookie": {"session_token=" + c.Token}, + }, + }, + ) + if err != nil { + if resp != nil { + return nil, bodyError(resp) + } + return nil, err + } + return conn, nil +} + func (c Client) DialWush(env Environment, opts *WushOptions, cmd string, args ...string) (*websocket.Conn, error) { u := c.copyURL() if c.BaseURL.Scheme == "https" { From 7ba07e967c4eb06b3861f37ee713718e8ab8946c Mon Sep 17 00:00:00 2001 From: Charlie Moog Date: Wed, 10 Jun 2020 09:21:14 -0500 Subject: [PATCH 2/4] Migrate coder sync to wsep --- internal/entclient/env.go | 50 ---------- internal/sync/sync.go | 32 +++++-- wush/client.go | 197 -------------------------------------- wush/clientmessage.go | 24 ----- wush/doc.go | 6 -- wush/promise.go | 19 ---- wush/servermessage.go | 22 ----- 7 files changed, 22 insertions(+), 328 deletions(-) delete mode 100644 wush/client.go delete mode 100644 wush/clientmessage.go delete mode 100644 wush/doc.go delete mode 100644 wush/promise.go delete mode 100644 wush/servermessage.go diff --git a/internal/entclient/env.go b/internal/entclient/env.go index 6a5fb3bf..45a7aa0e 100644 --- a/internal/entclient/env.go +++ b/internal/entclient/env.go @@ -2,8 +2,6 @@ package entclient import ( "context" - "net/url" - "strconv" "time" "nhooyr.io/websocket" @@ -24,16 +22,6 @@ func (c Client) Envs(user *User, org Org) ([]Environment, error) { return envs, err } -type WushOptions struct { - TTY bool - Stdin bool -} - -var defaultWushOptions = WushOptions{ - TTY: false, - Stdin: true, -} - func (c Client) DialWsep(ctx context.Context, env Environment) (*websocket.Conn, error) { u := c.copyURL() if c.BaseURL.Scheme == "https" { @@ -61,41 +49,3 @@ func (c Client) DialWsep(ctx context.Context, env Environment) (*websocket.Conn, } return conn, nil } - -func (c Client) DialWush(env Environment, opts *WushOptions, cmd string, args ...string) (*websocket.Conn, error) { - u := c.copyURL() - if c.BaseURL.Scheme == "https" { - u.Scheme = "wss" - } else { - u.Scheme = "ws" - } - u.Path = "/proxy/environments/" + env.ID + "/wush-lite" - query := make(url.Values) - query.Set("command", cmd) - query["args[]"] = args - if opts == nil { - opts = &defaultWushOptions - } - query.Set("tty", strconv.FormatBool(opts.TTY)) - query.Set("stdin", strconv.FormatBool(opts.Stdin)) - - ctx, cancel := context.WithTimeout(context.Background(), time.Second*15) - defer cancel() - - fullURL := u.String() + "?" + query.Encode() - - conn, resp, err := websocket.Dial(ctx, fullURL, - &websocket.DialOptions{ - HTTPHeader: map[string][]string{ - "Cookie": {"session_token=" + c.Token}, - }, - }, - ) - if err != nil { - if resp != nil { - return nil, bodyError(resp) - } - return nil, err - } - return conn, nil -} diff --git a/internal/sync/sync.go b/internal/sync/sync.go index e456b47f..ab857cf7 100644 --- a/internal/sync/sync.go +++ b/internal/sync/sync.go @@ -22,7 +22,7 @@ import ( "go.coder.com/flog" "cdr.dev/coder-cli/internal/entclient" - "cdr.dev/coder-cli/wush" + "cdr.dev/wsep" ) // Sync runs a live sync daemon. @@ -67,22 +67,31 @@ func (s Sync) syncPaths(delete bool, local, remote string) error { return nil } -func (s Sync) remoteRm(remote string) error { - conn, err := s.Client.DialWush(s.Environment, nil, "rm", "-rf", remote) +func (s Sync) remoteRm(ctx context.Context, remote string) error { + conn, err := s.Client.DialWsep(ctx, s.Environment) if err != nil { return err } defer conn.Close(websocket.CloseNormalClosure, "") - wc := wush.NewClient(context.Background(), conn) - go io.Copy(os.Stdout, wc.Stderr) - go io.Copy(os.Stderr, wc.Stdout) - code, err := wc.Wait() + + execer := wsep.RemoteExecer(conn) + process, err := execer.Start(ctx, wsep.Command{ + Command: "rm", + Args: []string{"-rf", remote}, + }) if err != nil { - return xerrors.Errorf("wush failure: %w", err) + return err } - if code != 0 { + go io.Copy(os.Stdout, process.Stderr()) + go io.Copy(os.Stderr, process.Stdout()) + + err = process.Wait() + if code, ok := err.(wsep.ExitError); ok { return fmt.Errorf("rm exit status: %v", code) } + if err != nil { + return xerrors.Errorf("execution failure: %w", err) + } return nil } @@ -128,7 +137,10 @@ func (s Sync) handleCreate(localPath string) error { } func (s Sync) handleDelete(localPath string) error { - return s.remoteRm(s.convertPath(localPath)) + ctx, cancel := context.WithTimeout(context.Background(), time.Minute) + defer cancel() + + return s.remoteRm(ctx, s.convertPath(localPath)) } func (s Sync) handleRename(localPath string) error { diff --git a/wush/client.go b/wush/client.go deleted file mode 100644 index 84abb314..00000000 --- a/wush/client.go +++ /dev/null @@ -1,197 +0,0 @@ -package wush - -import ( - "context" - "encoding/base64" - "encoding/json" - "io" - "io/ioutil" - - "golang.org/x/sync/errgroup" - "golang.org/x/xerrors" - "nhooyr.io/websocket" - "nhooyr.io/websocket/wsjson" -) - -// Client converts a Wush connection into OS streams. -type Client struct { - statusPromise promise - exitCode uint8 - err error - - conn *websocket.Conn - ctx context.Context - - Stdin io.WriteCloser - Stdout io.Reader - Stderr io.Reader -} - -type stdinWriter struct { - *Client -} - -func (w *stdinWriter) writeChunk(p []byte) (int, error) { - err := wsjson.Write(w.ctx, w.conn, &ClientMessage{ - Type: Stdin, - Input: base64.StdEncoding.EncodeToString(p), - }) - if err != nil { - return 0, err - } - - return len(p), nil -} - -func (w *stdinWriter) Write(p []byte) (int, error) { - // The real size is ~64,000, but we have to account for the - // shitty base64ing. - const maxSize = 8192 - - var nn int - for len(p) > maxSize { - n, err := w.writeChunk(p[:maxSize]) - nn += n - if err != nil { - return nn, err - } - p = p[maxSize:] - } - - n, err := w.writeChunk(p) - nn += n - return nn, err -} - -func (w *stdinWriter) Close() error { - return wsjson.Write(w.ctx, w.conn, &ClientMessage{ - Type: CloseStdin, - }) -} - -func (c *Client) Resize(width, height int) error { - err := wsjson.Write(c.ctx, c.conn, &ClientMessage{ - Type: Resize, - Height: height, - Width: width, - }) - return err -} - -// NewClient begins multiplexing the Wush connection -// into independent streams. -// It will cancel all goroutines when the provided context cancels. -func NewClient(ctx context.Context, conn *websocket.Conn) *Client { - var ( - stdoutReader, stdoutWriter = io.Pipe() - stderrReader, stderrWriter = io.Pipe() - ) - - eg, ctx := errgroup.WithContext(ctx) - - c := &Client{ - Stdout: stdoutReader, - Stderr: stderrReader, - conn: conn, - ctx: ctx, - statusPromise: newPromise(), - } - c.Stdin = &stdinWriter{ - Client: c, - } - - // We expect massive reads from some commands. Because we're streaming it's no big deal. - conn.SetReadLimit(1 << 40) - - // This channel must be buffered because all goroutines exit before the cleanup routine. - exitCode := make(chan uint8, 1) - // Start read side - eg.Go(func() error { - defer stdoutWriter.Close() - defer stderrWriter.Close() - - buf := make([]byte, 32<<10) - for { - _, rdr, err := conn.Reader(ctx) - if err != nil { - return nil - } - streamID := make([]byte, 1) - _, err = io.ReadFull(rdr, streamID) - if err != nil { - return xerrors.Errorf("read stream ID: %w", err) - } - switch StreamID(streamID[0]) { - case Stdout: - _, err = io.CopyBuffer(stdoutWriter, rdr, buf) - if err != nil { - return err - } - case Stderr: - _, err = io.CopyBuffer(stderrWriter, rdr, buf) - if err != nil { - return err - } - case ExitCode: - exitCodeBuf := make([]byte, 1) - _, err = io.ReadFull(rdr, exitCodeBuf) - if err != nil { - return xerrors.Errorf("read exit code: %w", err) - } - exitCode <- uint8(exitCodeBuf[0]) - return nil - default: - // This probably means an error was returned. - errResp, err := ioutil.ReadAll(rdr) - if err != nil { - return xerrors.Errorf("read error msg: %w", err) - } - - // Since we read the first byte to check the - // stream id, prepend it to the rest of the - // data. - errResp = append([]byte{streamID[0]}, errResp...) - return handleStreamError(errResp) - } - } - }) - // Cleanup routine - go func() { - defer c.statusPromise.Release() - - err := eg.Wait() - // If the command failed before exit code, don't block. - select { - case c.exitCode = <-exitCode: - default: - } - c.err = err - }() - - return c -} - -func handleStreamError(body []byte) error { - res := struct { - Error struct { - Msg string `json:"msg"` - Verbose string `json:"verbose"` - } `json:"error"` - }{} - - err := json.Unmarshal(body, &res) - if err != nil { - // If it's not a JSON error just print response verbatim. - return xerrors.Errorf("unknown stream error: %s", string(body)) - } - - return xerrors.Errorf(res.Error.Msg) -} - -// Wait returns the status code of the command, along -// with any error. -func (c *Client) Wait() (uint8, error) { - c.statusPromise.Wait() - // There is guaranteed to be no writers after the channel is closed. - return c.exitCode, c.err -} diff --git a/wush/clientmessage.go b/wush/clientmessage.go deleted file mode 100644 index 5e37ca50..00000000 --- a/wush/clientmessage.go +++ /dev/null @@ -1,24 +0,0 @@ -package wush - -// ClientMsgType specifies the type of a wush lite message from the client. -type ClientMsgType int - -const ( - Stdin ClientMsgType = iota - Resize - CloseStdin -) - -// ClientMessage is sent from the local client to the wush server. -type ClientMessage struct { - Type ClientMsgType `json:"type"` - - // Valid on "input" messages. - // Because this encodes everything in base64, it will case ~30% performance - // overhead. - Input string `json:"input"` - - // Valid on "resize" messages. - Height int `json:"height"` - Width int `json:"width"` -} diff --git a/wush/doc.go b/wush/doc.go deleted file mode 100644 index 2ed5fc46..00000000 --- a/wush/doc.go +++ /dev/null @@ -1,6 +0,0 @@ -// Package wush is Coder Enterprise's protocol for transmitting Linux command execution -// over a WebSocket connection. It provides stdin, stdout, tty information, and exit code. -// -// This package provides the protocol, but no facilities beyond that for creating a wush server. -// This protocol was designed haphazardly and will likely be rebuild in the near term. -package wush diff --git a/wush/promise.go b/wush/promise.go deleted file mode 100644 index 9d4e89d9..00000000 --- a/wush/promise.go +++ /dev/null @@ -1,19 +0,0 @@ -package wush - -type promise struct { - wait chan struct{} -} - -func newPromise() promise { - return promise{wait: make(chan struct{})} -} - -// Wait may be called any number of times by value recievers. -func (o promise) Wait() { - <-o.wait -} - -// Release may only be called once from the value setter. -func (o promise) Release() { - close(o.wait) -} diff --git a/wush/servermessage.go b/wush/servermessage.go deleted file mode 100644 index 5d738b53..00000000 --- a/wush/servermessage.go +++ /dev/null @@ -1,22 +0,0 @@ -package wush - -import "io" - -// StreamID specifies the kind of data being transmitted. -type StreamID byte - -// Wush lite output stream IDs. -const ( - Stdout StreamID = 0 - Stderr StreamID = 1 - - // StreamID is a special stream ID, where the data is just a - // single byte representing the exit code of the process. - ExitCode StreamID = 255 -) - -// ServerMessage is sent over websocket type binary. -type ServerMessage struct { - StreamID byte - Body io.Reader -} From 8cbafc709ccc6f2e6d6f35f63b3b506321d323e2 Mon Sep 17 00:00:00 2001 From: Charlie Moog Date: Wed, 10 Jun 2020 09:25:37 -0500 Subject: [PATCH 3/4] Fix resize cancel exit --- cmd/coder/shell.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/cmd/coder/shell.go b/cmd/coder/shell.go index c8d9ac30..9146fa9a 100644 --- a/cmd/coder/shell.go +++ b/cmd/coder/shell.go @@ -51,7 +51,7 @@ func sendResizeEvents(ctx context.Context, termfd int, process wsep.Process) { // Limit the frequency of resizes to prevent a stuttering effect. resizeLimiter := rate.NewLimiter(rate.Every(time.Millisecond*100), 1) - for { + for ctx.Err() == nil { if ctx.Err() != nil { return } From 925216e3293650937d37cbb3d730ebba08c8eca4 Mon Sep 17 00:00:00 2001 From: Charlie Moog Date: Wed, 10 Jun 2020 13:53:56 -0500 Subject: [PATCH 4/4] Remove go get install suggestion --- README.md | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/README.md b/README.md index 1a72c931..a0f61706 100644 --- a/README.md +++ b/README.md @@ -8,13 +8,7 @@ To report bugs and request features, please [open an issue](https://github.com/c ## Installation -To install the latest version use: - -```bash -go get cdr.dev/coder-cli/cmd/coder -``` - -To install a specific [release](https://github.com/cdr/coder-cli/releases): +Install the latest release [here](https://github.com/cdr/coder-cli/releases): 1. Click a release and download the tar file for your operating system (ex: coder-cli-linux-amd64.tar.gz) 2. Extract the `coder` binary from the tar file, ex: