Implement DCC streaming

client/js/modules/socket.js

@@ -134,6 +134,22 @@ export default function handleSocket({
       }
     },
 
+    dcc_send({ server, from, filename, url }) {
+      const serverName = getState().servers[server]?.name || server;
+
+      dispatch(
+        openModal('confirm', {
+          question: `${from} on ${serverName} is sending you: ${filename}`,
+          confirmation: 'Download',
+          onConfirm: () => {
+            const a = document.createElement('a');
+            a.href = url;
+            a.click();
+          }
+        })
+      );
+    },
+
     _connected(connected) {
       dispatch(setConnected(connected));
     }

commands/dispatch.go

@@ -109,8 +109,14 @@ func init() {
 	viper.BindPFlags(rootCmd.PersistentFlags())
 	viper.BindPFlags(rootCmd.Flags())
 
-	viper.SetDefault("hexIP", false)
 	viper.SetDefault("verify_certificates", true)
+	viper.SetDefault("https.enabled", true)
+	viper.SetDefault("https.port", 443)
+	viper.SetDefault("auth.anonymous", true)
+	viper.SetDefault("auth.login", true)
+	viper.SetDefault("auth.registration", true)
+	viper.SetDefault("dcc.enabled", true)
+	viper.SetDefault("dcc.autoget.delete", true)
 }
 
 func initConfig(configPath string, overwrite bool) {

config.default.toml

@@ -4,8 +4,6 @@ port = 80
 # Hex encode the users IP and use it as the ident
 hexIP = false
 verify_certificates = true
-# Automatically download files from DCC SENDs
-autoget = false
 
 # Defaults for the client connect form
 [defaults]
@@ -63,6 +61,20 @@ secret = ""
 key = ""
 secret = ""
 
+[dcc]
+# Receive files through DCC, the user gets to choose if they want to accept the file,
+# the file then gets streamed to the user
+enabled = true
+
+[dcc.autoget]
+# Instead of streaming the file to the user, dispatch automatically downloads
+# DCC files and sends a download link to the user once its done
+enabled = false
+# Delete the file after the user has downloaded it once
+delete = true
+# Delete the file after a certain time period of inactivity, not implemented yet
+delete_after = "30m"
+
 # Strict-Transport-Security
 [https.hsts]
 enabled = false

config/config.go

@@ -14,12 +14,12 @@ type Config struct {
 	Dev                bool
 	HexIP              bool
 	VerifyCertificates bool `mapstructure:"verify_certificates"`
-	Autoget            bool
 	Headers            map[string]string
 	Defaults           Defaults
 	HTTPS              HTTPS
 	LetsEncrypt        LetsEncrypt
 	Auth               Auth
+	DCC                DCC
 }
 
 type Defaults struct {
@@ -65,6 +65,17 @@ type Provider struct {
 	Secret string
 }
 
+type DCC struct {
+	Enabled bool
+	Autoget Autoget
+}
+
+type Autoget struct {
+	Enabled     bool
+	Delete      bool
+	DeleteAfter time.Duration `mapstructure:"delete_after"`
+}
+
 func LoadConfig() (*Config, chan *Config) {
 	viper.SetConfigName("config")
 	viper.AddConfigPath(storage.Path.ConfigRoot())

pkg/https/https.go

@@ -41,7 +41,6 @@ func Serve(handler http.Handler, cfg Config) error {
 		httpsSrv := &http.Server{
 			Addr:        net.JoinHostPort(cfg.Addr, cfg.PortHTTPS),
 			ReadTimeout: 5 * time.Second,
-			WriteTimeout: 10 * time.Second,
 			IdleTimeout: 120 * time.Second,
 			Handler:     handler,
 		}
@@ -101,7 +100,6 @@ func Serve(handler http.Handler, cfg Config) error {
 		}
 	} else {
 		httpSrv.ReadTimeout = 5 * time.Second
-		httpSrv.WriteTimeout = 10 * time.Second
 		httpSrv.IdleTimeout = 120 * time.Second
 		httpSrv.Handler = handler
 

pkg/irc/client.go

@@ -26,12 +26,8 @@ type Client struct {
 	// Source is the reply to SOURCE CTCP messages
 	Source string
 
-	DownloadFolder string
-	Autoget        bool
-
 	Messages          chan *Message
 	ConnectionChanged chan ConnectionState
-	Progress          chan DownloadProgress
 	Features          *Features
 	nick              string
 	channels          []string
@@ -59,7 +55,6 @@ func NewClient(nick, username string) *Client {
 		Realname:          nick,
 		Messages:          make(chan *Message, 32),
 		ConnectionChanged: make(chan ConnectionState, 4),
-		Progress:          make(chan DownloadProgress, 4),
 		out:               make(chan string, 32),
 		quit:              make(chan struct{}),
 		reconnect:         make(chan struct{}),

pkg/irc/ctcp.go

@@ -47,13 +47,6 @@ func (c *Client) handleCTCP(ctcp *CTCP, msg *Message) {
 	case "CLIENTINFO":
 		c.ReplyCTCP(msg.Nick, ctcp.Command, ClientInfo)
 
-	case "DCC":
-		if strings.HasPrefix(ctcp.Params, "SEND") {
-			if dccSend := ParseDCCSend(ctcp); dccSend != nil {
-				go c.Download(dccSend)
-			}
-		}
-
 	case "FINGER", "VERSION":
 		if c.Version != "" {
 			c.ReplyCTCP(msg.Nick, ctcp.Command, c.Version)

pkg/irc/dcc.go

@@ -2,14 +2,11 @@ package irc
 
 import (
 	"encoding/binary"
-	"encoding/json"
 	"fmt"
 	"io"
 	"math"
 	"net"
-	"os"
 	"path"
-	"path/filepath"
 	"strconv"
 	"strings"
 	"time"
@@ -52,27 +49,16 @@ func ParseDCCSend(ctcp *CTCP) *DCCSend {
 	return nil
 }
 
-func (c *Client) Download(pack *DCCSend) {
+func DownloadDCC(w io.Writer, pack *DCCSend, progress chan DownloadProgress) error {
-	if !c.Autoget {
+	if progress != nil {
-		// TODO: ask user if he/she wants to download the file
+		progress <- DownloadProgress{
-		return
-	}
-
-	c.Progress <- DownloadProgress{
 			File: pack.File,
 		}
-
-	file, err := os.OpenFile(filepath.Join(c.DownloadFolder, pack.File), os.O_CREATE|os.O_WRONLY, 0644)
-	if err != nil {
-		c.downloadFailed(pack, err)
-		return
 	}
-	defer file.Close()
 
 	conn, err := net.Dial("tcp", net.JoinHostPort(pack.IP, pack.Port))
 	if err != nil {
-		c.downloadFailed(pack, err)
+		return err
-		return
 	}
 	defer conn.Close()
 
@@ -87,24 +73,26 @@ func (c *Client) Download(pack *DCCSend) {
 		n, err := conn.Read(buf)
 		if err != nil {
 			if err != io.EOF {
-				c.downloadFailed(pack, err)
+				return err
-				return
 			}
 			if n == 0 {
 				break
 			}
 		}
 
-		if _, err := file.Write(buf[:n]); err != nil {
+		if _, err := w.Write(buf[:n]); err != nil {
-			c.downloadFailed(pack, err)
+			return err
-			return
 		}
 
 		accBytes += uint64(n)
 		totalBytes += uint64(n)
 
-		conn.Write(uint64Bytes(totalBytes))
+		_, err = conn.Write(uint64Bytes(totalBytes))
+		if err != nil {
+			return err
+		}
 
+		if progress != nil {
 			if dt := time.Since(prevUpdate); dt >= time.Second {
 				prevUpdate = time.Now()
 
@@ -119,7 +107,7 @@ func (c *Client) Download(pack *DCCSend) {
 				bytesRemaining := float64(pack.Length - totalBytes)
 				percentage := 100 * (float64(totalBytes) / float64(pack.Length))
 
-			c.Progress <- DownloadProgress{
+				progress <- DownloadProgress{
 					Speed:          humanReadableByteCount(averageSpeed, true),
 					PercCompletion: percentage,
 					BytesRemaining: humanReadableByteCount(bytesRemaining, false),
@@ -130,8 +118,10 @@ func (c *Client) Download(pack *DCCSend) {
 				}
 			}
 		}
+	}
 
-	c.Progress <- DownloadProgress{
+	if progress != nil {
+		progress <- DownloadProgress{
 			PercCompletion: 100,
 			BytesCompleted: humanReadableByteCount(float64(totalBytes), false),
 			SecondsElapsed: secondsSince(start),
@@ -139,12 +129,7 @@ func (c *Client) Download(pack *DCCSend) {
 		}
 	}
 
-func (c *Client) downloadFailed(pack *DCCSend, err error) {
+	return nil
-	c.Progress <- DownloadProgress{
-		PercCompletion: -1,
-		File:           pack.File,
-		Error:          err,
-	}
 }
 
 type DownloadProgress struct {
@@ -158,14 +143,6 @@ type DownloadProgress struct {
 	SecondsToGo    float64 `json:"eta"`
 }
 
-func (p DownloadProgress) ToJSON() string {
-	progress, err := json.Marshal(p)
-	if err != nil {
-		return ""
-	}
-	return string(progress)
-}
-
 func intToIP(n int) string {
 	var byte1 = n & 255
 	var byte2 = ((n >> 8) & 255)

server/irc.go

@@ -73,9 +73,6 @@ func connectIRC(server *storage.Server, state *State, srcIP []byte) *irc.Client
 		}
 	}
 
-	i.DownloadFolder = storage.Path.Downloads(state.user.Username)
-	i.Autoget = cfg.Autoget
-
 	state.setIRC(server.Host, i)
 	i.Connect(address)
 	go newIRCHandler(i, state).run()

server/irc_handler.go

@@ -3,8 +3,10 @@ package server
 import (
 	"fmt"
 	"log"
+	"os"
 	"strconv"
 	"strings"
+	"time"
 	"unicode"
 
 	"github.com/kjk/betterguid"
@@ -26,6 +28,7 @@ type ircHandler struct {
 	userBuffers map[string][]string
 	motdBuffer  MOTD
 	listBuffer  storage.ChannelListIndex
+	dccProgress chan irc.DownloadProgress
 
 	handlers map[string]func(*irc.Message)
 }
@@ -35,6 +38,7 @@ func newIRCHandler(client *irc.Client, state *State) *ircHandler {
 		client:      client,
 		state:       state,
 		userBuffers: make(map[string][]string),
+		dccProgress: make(chan irc.DownloadProgress, 4),
 	}
 	i.initHandlers()
 	return i
@@ -64,7 +68,7 @@ func (i *ircHandler) run() {
 				i.log("Connected")
 			}
 
-		case progress := <-i.client.Progress:
+		case progress := <-i.dccProgress:
 			if progress.Error != nil {
 				i.sendDCCInfo("%s: Download failed (%s)", true, progress.File, progress.Error)
 			} else if progress.PercCompletion == 100 {
@@ -175,10 +179,46 @@ func (i *ircHandler) mode(msg *irc.Message) {
 	}
 }
 
-func (i *ircHandler) message(msg *irc.Message) {
+func (i *ircHandler) receiveDCCSend(pack *irc.DCCSend, msg *irc.Message) {
-	if ctcp := msg.ToCTCP(); ctcp != nil && ctcp.Command != "ACTION" {
+	cfg := i.state.srv.Config()
+
+	if cfg.DCC.Enabled {
+		if cfg.DCC.Autoget.Enabled {
+			file, err := os.OpenFile(storage.Path.DownloadedFile(i.state.user.Username, pack.File), os.O_CREATE|os.O_WRONLY, 0644)
+			if err != nil {
 				return
 			}
+			defer file.Close()
+
+			irc.DownloadDCC(file, pack, i.dccProgress)
+		} else {
+			i.state.setPendingDCC(pack.File, pack)
+
+			i.state.sendJSON("dcc_send", DCCSend{
+				Server:   i.client.Host,
+				From:     msg.Nick,
+				Filename: pack.File,
+				URL: fmt.Sprintf("%s://%s/downloads/%s/%s",
+					i.state.String("scheme"), i.state.String("host"), i.state.user.Username, pack.File),
+			})
+
+			time.Sleep(150 * time.Second)
+			i.state.deletePendingDCC(pack.File)
+		}
+	}
+}
+
+func (i *ircHandler) message(msg *irc.Message) {
+	if ctcp := msg.ToCTCP(); ctcp != nil {
+		if ctcp.Command == "DCC" && strings.HasPrefix(ctcp.Params, "SEND") {
+			if pack := irc.ParseDCCSend(ctcp); pack != nil {
+				go i.receiveDCCSend(pack, msg)
+				return
+			}
+		} else if ctcp.Command != "ACTION" {
+			return
+		}
+	}
 
 	message := Message{
 		ID:      betterguid.New(),
@@ -431,8 +471,7 @@ func (i *ircHandler) initHandlers() {
 }
 
 func (i *ircHandler) log(v ...interface{}) {
-	s := fmt.Sprintln(v...)
+	log.Println("[IRC]", i.state.user.ID, i.client.Host, fmt.Sprint(v...))
-	log.Println("[IRC]", i.state.user.ID, i.client.Host, s[:len(s)-1])
 }
 
 func (i *ircHandler) sendDCCInfo(message string, log bool, a ...interface{}) {

server/json.go

@@ -222,6 +222,13 @@ type ChannelForward struct {
 	New    string
 }
 
+type DCCSend struct {
+	Server   string
+	From     string
+	Filename string
+	URL      string
+}
+
 type Tab struct {
 	storage.Tab
 }

server/json_easyjson.go

@@ -3060,7 +3060,110 @@ func (v *Error) UnmarshalJSON(data []byte) error {
 func (v *Error) UnmarshalEasyJSON(l *jlexer.Lexer) {
 	easyjson42239ddeDecodeGithubComKhliengDispatchServer27(l, v)
 }
-func easyjson42239ddeDecodeGithubComKhliengDispatchServer28(in *jlexer.Lexer, out *ConnectionUpdate) {
+func easyjson42239ddeDecodeGithubComKhliengDispatchServer28(in *jlexer.Lexer, out *DCCSend) {
+	isTopLevel := in.IsStart()
+	if in.IsNull() {
+		if isTopLevel {
+			in.Consumed()
+		}
+		in.Skip()
+		return
+	}
+	in.Delim('{')
+	for !in.IsDelim('}') {
+		key := in.UnsafeFieldName(false)
+		in.WantColon()
+		if in.IsNull() {
+			in.Skip()
+			in.WantComma()
+			continue
+		}
+		switch key {
+		case "server":
+			out.Server = string(in.String())
+		case "from":
+			out.From = string(in.String())
+		case "filename":
+			out.Filename = string(in.String())
+		case "url":
+			out.URL = string(in.String())
+		default:
+			in.SkipRecursive()
+		}
+		in.WantComma()
+	}
+	in.Delim('}')
+	if isTopLevel {
+		in.Consumed()
+	}
+}
+func easyjson42239ddeEncodeGithubComKhliengDispatchServer28(out *jwriter.Writer, in DCCSend) {
+	out.RawByte('{')
+	first := true
+	_ = first
+	if in.Server != "" {
+		const prefix string = ",\"server\":"
+		first = false
+		out.RawString(prefix[1:])
+		out.String(string(in.Server))
+	}
+	if in.From != "" {
+		const prefix string = ",\"from\":"
+		if first {
+			first = false
+			out.RawString(prefix[1:])
+		} else {
+			out.RawString(prefix)
+		}
+		out.String(string(in.From))
+	}
+	if in.Filename != "" {
+		const prefix string = ",\"filename\":"
+		if first {
+			first = false
+			out.RawString(prefix[1:])
+		} else {
+			out.RawString(prefix)
+		}
+		out.String(string(in.Filename))
+	}
+	if in.URL != "" {
+		const prefix string = ",\"url\":"
+		if first {
+			first = false
+			out.RawString(prefix[1:])
+		} else {
+			out.RawString(prefix)
+		}
+		out.String(string(in.URL))
+	}
+	out.RawByte('}')
+}
+
+// MarshalJSON supports json.Marshaler interface
+func (v DCCSend) MarshalJSON() ([]byte, error) {
+	w := jwriter.Writer{}
+	easyjson42239ddeEncodeGithubComKhliengDispatchServer28(&w, v)
+	return w.Buffer.BuildBytes(), w.Error
+}
+
+// MarshalEasyJSON supports easyjson.Marshaler interface
+func (v DCCSend) MarshalEasyJSON(w *jwriter.Writer) {
+	easyjson42239ddeEncodeGithubComKhliengDispatchServer28(w, v)
+}
+
+// UnmarshalJSON supports json.Unmarshaler interface
+func (v *DCCSend) UnmarshalJSON(data []byte) error {
+	r := jlexer.Lexer{Data: data}
+	easyjson42239ddeDecodeGithubComKhliengDispatchServer28(&r, v)
+	return r.Error()
+}
+
+// UnmarshalEasyJSON supports easyjson.Unmarshaler interface
+func (v *DCCSend) UnmarshalEasyJSON(l *jlexer.Lexer) {
+	easyjson42239ddeDecodeGithubComKhliengDispatchServer28(l, v)
+}
+func easyjson42239ddeDecodeGithubComKhliengDispatchServer29(in *jlexer.Lexer, out *ConnectionUpdate) {
 	isTopLevel := in.IsStart()
 	if in.IsNull() {
 		if isTopLevel {
@@ -3097,7 +3200,7 @@ func easyjson42239ddeDecodeGithubComKhliengDispatchServer28(in *jlexer.Lexer, ou
 		in.Consumed()
 	}
 }
-func easyjson42239ddeEncodeGithubComKhliengDispatchServer28(out *jwriter.Writer, in ConnectionUpdate) {
+func easyjson42239ddeEncodeGithubComKhliengDispatchServer29(out *jwriter.Writer, in ConnectionUpdate) {
 	out.RawByte('{')
 	first := true
 	_ = first
@@ -3143,27 +3246,27 @@ func easyjson42239ddeEncodeGithubComKhliengDispatchServer28(out *jwriter.Writer,
 // MarshalJSON supports json.Marshaler interface
 func (v ConnectionUpdate) MarshalJSON() ([]byte, error) {
 	w := jwriter.Writer{}
-	easyjson42239ddeEncodeGithubComKhliengDispatchServer28(&w, v)
+	easyjson42239ddeEncodeGithubComKhliengDispatchServer29(&w, v)
 	return w.Buffer.BuildBytes(), w.Error
 }
 
 // MarshalEasyJSON supports easyjson.Marshaler interface
 func (v ConnectionUpdate) MarshalEasyJSON(w *jwriter.Writer) {
-	easyjson42239ddeEncodeGithubComKhliengDispatchServer28(w, v)
+	easyjson42239ddeEncodeGithubComKhliengDispatchServer29(w, v)
 }
 
 // UnmarshalJSON supports json.Unmarshaler interface
 func (v *ConnectionUpdate) UnmarshalJSON(data []byte) error {
 	r := jlexer.Lexer{Data: data}
-	easyjson42239ddeDecodeGithubComKhliengDispatchServer28(&r, v)
+	easyjson42239ddeDecodeGithubComKhliengDispatchServer29(&r, v)
 	return r.Error()
 }
 
 // UnmarshalEasyJSON supports easyjson.Unmarshaler interface
 func (v *ConnectionUpdate) UnmarshalEasyJSON(l *jlexer.Lexer) {
-	easyjson42239ddeDecodeGithubComKhliengDispatchServer28(l, v)
+	easyjson42239ddeDecodeGithubComKhliengDispatchServer29(l, v)
 }
-func easyjson42239ddeDecodeGithubComKhliengDispatchServer29(in *jlexer.Lexer, out *ClientCert) {
+func easyjson42239ddeDecodeGithubComKhliengDispatchServer30(in *jlexer.Lexer, out *ClientCert) {
 	isTopLevel := in.IsStart()
 	if in.IsNull() {
 		if isTopLevel {
@@ -3196,7 +3299,7 @@ func easyjson42239ddeDecodeGithubComKhliengDispatchServer29(in *jlexer.Lexer, ou
 		in.Consumed()
 	}
 }
-func easyjson42239ddeEncodeGithubComKhliengDispatchServer29(out *jwriter.Writer, in ClientCert) {
+func easyjson42239ddeEncodeGithubComKhliengDispatchServer30(out *jwriter.Writer, in ClientCert) {
 	out.RawByte('{')
 	first := true
 	_ = first
@@ -3222,27 +3325,27 @@ func easyjson42239ddeEncodeGithubComKhliengDispatchServer29(out *jwriter.Writer,
 // MarshalJSON supports json.Marshaler interface
 func (v ClientCert) MarshalJSON() ([]byte, error) {
 	w := jwriter.Writer{}
-	easyjson42239ddeEncodeGithubComKhliengDispatchServer29(&w, v)
+	easyjson42239ddeEncodeGithubComKhliengDispatchServer30(&w, v)
 	return w.Buffer.BuildBytes(), w.Error
 }
 
 // MarshalEasyJSON supports easyjson.Marshaler interface
 func (v ClientCert) MarshalEasyJSON(w *jwriter.Writer) {
-	easyjson42239ddeEncodeGithubComKhliengDispatchServer29(w, v)
+	easyjson42239ddeEncodeGithubComKhliengDispatchServer30(w, v)
 }
 
 // UnmarshalJSON supports json.Unmarshaler interface
 func (v *ClientCert) UnmarshalJSON(data []byte) error {
 	r := jlexer.Lexer{Data: data}
-	easyjson42239ddeDecodeGithubComKhliengDispatchServer29(&r, v)
+	easyjson42239ddeDecodeGithubComKhliengDispatchServer30(&r, v)
 	return r.Error()
 }
 
 // UnmarshalEasyJSON supports easyjson.Unmarshaler interface
 func (v *ClientCert) UnmarshalEasyJSON(l *jlexer.Lexer) {
-	easyjson42239ddeDecodeGithubComKhliengDispatchServer29(l, v)
+	easyjson42239ddeDecodeGithubComKhliengDispatchServer30(l, v)
 }
-func easyjson42239ddeDecodeGithubComKhliengDispatchServer30(in *jlexer.Lexer, out *ChannelSearchResult) {
+func easyjson42239ddeDecodeGithubComKhliengDispatchServer31(in *jlexer.Lexer, out *ChannelSearchResult) {
 	isTopLevel := in.IsStart()
 	if in.IsNull() {
 		if isTopLevel {
@@ -3308,7 +3411,7 @@ func easyjson42239ddeDecodeGithubComKhliengDispatchServer30(in *jlexer.Lexer, ou
 		in.Consumed()
 	}
 }
-func easyjson42239ddeEncodeGithubComKhliengDispatchServer30(out *jwriter.Writer, in ChannelSearchResult) {
+func easyjson42239ddeEncodeGithubComKhliengDispatchServer31(out *jwriter.Writer, in ChannelSearchResult) {
 	out.RawByte('{')
 	first := true
 	_ = first
@@ -3367,25 +3470,25 @@ func easyjson42239ddeEncodeGithubComKhliengDispatchServer30(out *jwriter.Writer,
 // MarshalJSON supports json.Marshaler interface
 func (v ChannelSearchResult) MarshalJSON() ([]byte, error) {
 	w := jwriter.Writer{}
-	easyjson42239ddeEncodeGithubComKhliengDispatchServer30(&w, v)
+	easyjson42239ddeEncodeGithubComKhliengDispatchServer31(&w, v)
 	return w.Buffer.BuildBytes(), w.Error
 }
 
 // MarshalEasyJSON supports easyjson.Marshaler interface
 func (v ChannelSearchResult) MarshalEasyJSON(w *jwriter.Writer) {
-	easyjson42239ddeEncodeGithubComKhliengDispatchServer30(w, v)
+	easyjson42239ddeEncodeGithubComKhliengDispatchServer31(w, v)
 }
 
 // UnmarshalJSON supports json.Unmarshaler interface
 func (v *ChannelSearchResult) UnmarshalJSON(data []byte) error {
 	r := jlexer.Lexer{Data: data}
-	easyjson42239ddeDecodeGithubComKhliengDispatchServer30(&r, v)
+	easyjson42239ddeDecodeGithubComKhliengDispatchServer31(&r, v)
 	return r.Error()
 }
 
 // UnmarshalEasyJSON supports easyjson.Unmarshaler interface
 func (v *ChannelSearchResult) UnmarshalEasyJSON(l *jlexer.Lexer) {
-	easyjson42239ddeDecodeGithubComKhliengDispatchServer30(l, v)
+	easyjson42239ddeDecodeGithubComKhliengDispatchServer31(l, v)
 }
 func easyjson42239ddeDecodeGithubComKhliengDispatchStorage1(in *jlexer.Lexer, out *storage.ChannelListItem) {
 	isTopLevel := in.IsStart()
@@ -3454,7 +3557,7 @@ func easyjson42239ddeEncodeGithubComKhliengDispatchStorage1(out *jwriter.Writer,
 	}
 	out.RawByte('}')
 }
-func easyjson42239ddeDecodeGithubComKhliengDispatchServer31(in *jlexer.Lexer, out *ChannelSearch) {
+func easyjson42239ddeDecodeGithubComKhliengDispatchServer32(in *jlexer.Lexer, out *ChannelSearch) {
 	isTopLevel := in.IsStart()
 	if in.IsNull() {
 		if isTopLevel {
@@ -3489,7 +3592,7 @@ func easyjson42239ddeDecodeGithubComKhliengDispatchServer31(in *jlexer.Lexer, ou
 		in.Consumed()
 	}
 }
-func easyjson42239ddeEncodeGithubComKhliengDispatchServer31(out *jwriter.Writer, in ChannelSearch) {
+func easyjson42239ddeEncodeGithubComKhliengDispatchServer32(out *jwriter.Writer, in ChannelSearch) {
 	out.RawByte('{')
 	first := true
 	_ = first
@@ -3525,27 +3628,27 @@ func easyjson42239ddeEncodeGithubComKhliengDispatchServer31(out *jwriter.Writer,
 // MarshalJSON supports json.Marshaler interface
 func (v ChannelSearch) MarshalJSON() ([]byte, error) {
 	w := jwriter.Writer{}
-	easyjson42239ddeEncodeGithubComKhliengDispatchServer31(&w, v)
+	easyjson42239ddeEncodeGithubComKhliengDispatchServer32(&w, v)
 	return w.Buffer.BuildBytes(), w.Error
 }
 
 // MarshalEasyJSON supports easyjson.Marshaler interface
 func (v ChannelSearch) MarshalEasyJSON(w *jwriter.Writer) {
-	easyjson42239ddeEncodeGithubComKhliengDispatchServer31(w, v)
+	easyjson42239ddeEncodeGithubComKhliengDispatchServer32(w, v)
 }
 
 // UnmarshalJSON supports json.Unmarshaler interface
 func (v *ChannelSearch) UnmarshalJSON(data []byte) error {
 	r := jlexer.Lexer{Data: data}
-	easyjson42239ddeDecodeGithubComKhliengDispatchServer31(&r, v)
+	easyjson42239ddeDecodeGithubComKhliengDispatchServer32(&r, v)
 	return r.Error()
 }
 
 // UnmarshalEasyJSON supports easyjson.Unmarshaler interface
 func (v *ChannelSearch) UnmarshalEasyJSON(l *jlexer.Lexer) {
-	easyjson42239ddeDecodeGithubComKhliengDispatchServer31(l, v)
+	easyjson42239ddeDecodeGithubComKhliengDispatchServer32(l, v)
 }
-func easyjson42239ddeDecodeGithubComKhliengDispatchServer32(in *jlexer.Lexer, out *ChannelForward) {
+func easyjson42239ddeDecodeGithubComKhliengDispatchServer33(in *jlexer.Lexer, out *ChannelForward) {
 	isTopLevel := in.IsStart()
 	if in.IsNull() {
 		if isTopLevel {
@@ -3580,7 +3683,7 @@ func easyjson42239ddeDecodeGithubComKhliengDispatchServer32(in *jlexer.Lexer, ou
 		in.Consumed()
 	}
 }
-func easyjson42239ddeEncodeGithubComKhliengDispatchServer32(out *jwriter.Writer, in ChannelForward) {
+func easyjson42239ddeEncodeGithubComKhliengDispatchServer33(out *jwriter.Writer, in ChannelForward) {
 	out.RawByte('{')
 	first := true
 	_ = first
@@ -3616,27 +3719,27 @@ func easyjson42239ddeEncodeGithubComKhliengDispatchServer32(out *jwriter.Writer,
 // MarshalJSON supports json.Marshaler interface
 func (v ChannelForward) MarshalJSON() ([]byte, error) {
 	w := jwriter.Writer{}
-	easyjson42239ddeEncodeGithubComKhliengDispatchServer32(&w, v)
+	easyjson42239ddeEncodeGithubComKhliengDispatchServer33(&w, v)
 	return w.Buffer.BuildBytes(), w.Error
 }
 
 // MarshalEasyJSON supports easyjson.Marshaler interface
 func (v ChannelForward) MarshalEasyJSON(w *jwriter.Writer) {
-	easyjson42239ddeEncodeGithubComKhliengDispatchServer32(w, v)
+	easyjson42239ddeEncodeGithubComKhliengDispatchServer33(w, v)
 }
 
 // UnmarshalJSON supports json.Unmarshaler interface
 func (v *ChannelForward) UnmarshalJSON(data []byte) error {
 	r := jlexer.Lexer{Data: data}
-	easyjson42239ddeDecodeGithubComKhliengDispatchServer32(&r, v)
+	easyjson42239ddeDecodeGithubComKhliengDispatchServer33(&r, v)
 	return r.Error()
 }
 
 // UnmarshalEasyJSON supports easyjson.Unmarshaler interface
 func (v *ChannelForward) UnmarshalEasyJSON(l *jlexer.Lexer) {
-	easyjson42239ddeDecodeGithubComKhliengDispatchServer32(l, v)
+	easyjson42239ddeDecodeGithubComKhliengDispatchServer33(l, v)
 }
-func easyjson42239ddeDecodeGithubComKhliengDispatchServer33(in *jlexer.Lexer, out *Away) {
+func easyjson42239ddeDecodeGithubComKhliengDispatchServer34(in *jlexer.Lexer, out *Away) {
 	isTopLevel := in.IsStart()
 	if in.IsNull() {
 		if isTopLevel {
@@ -3669,7 +3772,7 @@ func easyjson42239ddeDecodeGithubComKhliengDispatchServer33(in *jlexer.Lexer, ou
 		in.Consumed()
 	}
 }
-func easyjson42239ddeEncodeGithubComKhliengDispatchServer33(out *jwriter.Writer, in Away) {
+func easyjson42239ddeEncodeGithubComKhliengDispatchServer34(out *jwriter.Writer, in Away) {
 	out.RawByte('{')
 	first := true
 	_ = first
@@ -3695,23 +3798,23 @@ func easyjson42239ddeEncodeGithubComKhliengDispatchServer33(out *jwriter.Writer,
 // MarshalJSON supports json.Marshaler interface
 func (v Away) MarshalJSON() ([]byte, error) {
 	w := jwriter.Writer{}
-	easyjson42239ddeEncodeGithubComKhliengDispatchServer33(&w, v)
+	easyjson42239ddeEncodeGithubComKhliengDispatchServer34(&w, v)
 	return w.Buffer.BuildBytes(), w.Error
 }
 
 // MarshalEasyJSON supports easyjson.Marshaler interface
 func (v Away) MarshalEasyJSON(w *jwriter.Writer) {
-	easyjson42239ddeEncodeGithubComKhliengDispatchServer33(w, v)
+	easyjson42239ddeEncodeGithubComKhliengDispatchServer34(w, v)
 }
 
 // UnmarshalJSON supports json.Unmarshaler interface
 func (v *Away) UnmarshalJSON(data []byte) error {
 	r := jlexer.Lexer{Data: data}
-	easyjson42239ddeDecodeGithubComKhliengDispatchServer33(&r, v)
+	easyjson42239ddeDecodeGithubComKhliengDispatchServer34(&r, v)
 	return r.Error()
 }
 
 // UnmarshalEasyJSON supports easyjson.Unmarshaler interface
 func (v *Away) UnmarshalEasyJSON(l *jlexer.Lexer) {
-	easyjson42239ddeDecodeGithubComKhliengDispatchServer33(l, v)
+	easyjson42239ddeDecodeGithubComKhliengDispatchServer34(l, v)
 }

server/server.go

@@ -3,6 +3,7 @@ package server
 import (
 	"log"
 	"net/http"
+	"os"
 	"strconv"
 	"strings"
 	"sync"
@@ -10,6 +11,7 @@ import (
 	"github.com/gorilla/websocket"
 	"github.com/khlieng/dispatch/config"
 	"github.com/khlieng/dispatch/pkg/https"
+	"github.com/khlieng/dispatch/pkg/irc"
 	"github.com/khlieng/dispatch/pkg/session"
 	"github.com/khlieng/dispatch/storage"
 )
@@ -202,9 +204,21 @@ func (d *Dispatch) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			}
 
 			filename := params[2]
-
 			w.Header().Set("Content-Disposition", "attachment; filename="+filename)
-			http.ServeFile(w, r, storage.Path.DownloadedFile(state.user.Username, filename))
+
+			if pack, ok := state.getPendingDCC(filename); ok {
+				state.deletePendingDCC(filename)
+
+				w.Header().Set("Content-Length", strconv.FormatUint(pack.Length, 10))
+				irc.DownloadDCC(w, pack, nil)
+			} else {
+				file := storage.Path.DownloadedFile(state.user.Username, filename)
+				http.ServeFile(w, r, file)
+
+				if d.Config().DCC.Autoget.Delete {
+					os.Remove(file)
+				}
+			}
 		} else {
 			fail(w, http.StatusNotFound)
 		}

server/state.go

@@ -22,6 +22,7 @@ type State struct {
 
 	irc             map[string]*irc.Client
 	connectionState map[string]irc.ConnectionState
+	pendingDCCSends map[string]*irc.DCCSend
 	ircLock         sync.Mutex
 
 	ws        map[string]*wsConn
@@ -39,6 +40,7 @@ func NewState(user *storage.User, srv *Dispatch) *State {
 		stateData:       stateData{m: map[string]interface{}{}},
 		irc:             make(map[string]*irc.Client),
 		connectionState: make(map[string]irc.ConnectionState),
+		pendingDCCSends: make(map[string]*irc.DCCSend),
 		ws:              make(map[string]*wsConn),
 		broadcast:       make(chan WSResponse, 32),
 		srv:             srv,
@@ -102,6 +104,25 @@ func (s *State) setConnectionState(server string, state irc.ConnectionState) {
 	s.ircLock.Unlock()
 }
 
+func (s *State) getPendingDCC(filename string) (*irc.DCCSend, bool) {
+	s.ircLock.Lock()
+	pack, ok := s.pendingDCCSends[filename]
+	s.ircLock.Unlock()
+	return pack, ok
+}
+
+func (s *State) setPendingDCC(filename string, pack *irc.DCCSend) {
+	s.ircLock.Lock()
+	s.pendingDCCSends[filename] = pack
+	s.ircLock.Unlock()
+}
+
+func (s *State) deletePendingDCC(filename string) {
+	s.ircLock.Lock()
+	delete(s.pendingDCCSends, filename)
+	s.ircLock.Unlock()
+}
+
 func (s *State) setWS(addr string, w *wsConn) {
 	s.wsLock.Lock()
 	s.ws[addr] = w